Git 2.0.1

Signed-off-by: Junio C Hamano <gitster@pobox.com>

.gitignore

@@ -182,6 +182,7 @@
 /test-dump-cache-tree
 /test-scrap-cache-tree
 /test-genrandom
+/test-hashmap
 /test-index-version
 /test-line-buffer
 /test-match-trees

Documentation/CodingGuidelines

@@ -126,6 +126,17 @@ For C programs:
    "char * string".  This makes it easier to understand code
    like "char *string, c;".
 
+ - Use whitespace around operators and keywords, but not inside
+   parentheses and not around functions. So:
+
+        while (condition)
+		func(bar + 1);
+
+   and not:
+
+        while( condition )
+		func (bar+1);
+
  - We avoid using braces unnecessarily.  I.e.
 
 	if (bla) {
@@ -153,6 +164,16 @@ For C programs:
 	 * multi-line comment.
 	 */
 
+   Note however that a comment that explains a translatable string to
+   translators uses a convention of starting with a magic token
+   "TRANSLATORS: " immediately after the opening delimiter, even when
+   it spans multiple lines.  We do not add an asterisk at the beginning
+   of each line, either.  E.g.
+
+	/* TRANSLATORS: here is a comment that explains the string
+	   to be translated, that follows immediately after it */
+	_("Here is a translatable string explained by the above.");
+
  - Double negation is often harder to understand than no negation
    at all.
 

Documentation/RelNotes/1.9.4.txt

@@ -0,0 +1,16 @@
+Git v1.9.4 Release Notes
+========================
+
+Fixes since v1.9.3
+------------------
+
+ * Commands that take pathspecs on the command line misbehaved when
+   the pathspec is given as an absolute pathname (which is a
+   practice not particularly encouraged) that points at a symbolic
+   link in the working tree.
+
+ * An earlier fix to the shell prompt script (in contrib/) for using
+   the PROMPT_COMMAND interface did not correctly check if the extra
+   code path needs to trigger, causing the branch name not to appear
+   when 'promptvars' option is disabled in bash or PROMPT_SUBST is
+   unset in zsh.

Documentation/RelNotes/2.0.0.txt

@@ -0,0 +1,364 @@
+Git v2.0 Release Notes
+======================
+
+Backward compatibility notes
+----------------------------
+
+When "git push [$there]" does not say what to push, we have used the
+traditional "matching" semantics so far (all your branches were sent
+to the remote as long as there already are branches of the same name
+over there).  In Git 2.0, the default is now the "simple" semantics,
+which pushes:
+
+ - only the current branch to the branch with the same name, and only
+   when the current branch is set to integrate with that remote
+   branch, if you are pushing to the same remote as you fetch from; or
+
+ - only the current branch to the branch with the same name, if you
+   are pushing to a remote that is not where you usually fetch from.
+
+You can use the configuration variable "push.default" to change
+this.  If you are an old-timer who wants to keep using the
+"matching" semantics, you can set the variable to "matching", for
+example.  Read the documentation for other possibilities.
+
+When "git add -u" and "git add -A" are run inside a subdirectory
+without specifying which paths to add on the command line, they
+operate on the entire tree for consistency with "git commit -a" and
+other commands (these commands used to operate only on the current
+subdirectory).  Say "git add -u ." or "git add -A ." if you want to
+limit the operation to the current directory.
+
+"git add <path>" is the same as "git add -A <path>" now, so that
+"git add dir/" will notice paths you removed from the directory and
+record the removal.  In older versions of Git, "git add <path>" used
+to ignore removals.  You can say "git add --ignore-removal <path>" to
+add only added or modified paths in <path>, if you really want to.
+
+The "-q" option to "git diff-files", which does *NOT* mean "quiet",
+has been removed (it told Git to ignore deletion, which you can do
+with "git diff-files --diff-filter=d").
+
+"git request-pull" lost a few "heuristics" that often led to mistakes.
+
+The default prefix for "git svn" has changed in Git 2.0.  For a long
+time, "git svn" created its remote-tracking branches directly under
+refs/remotes, but it now places them under refs/remotes/origin/ unless
+it is told otherwise with its "--prefix" option.
+
+
+Updates since v1.9 series
+-------------------------
+
+UI, Workflows & Features
+
+ * The "multi-mail" post-receive hook (in contrib/) has been updated
+   to a more recent version from upstream.
+
+ * The "remote-hg/bzr" remote-helper interfaces (used to be in
+   contrib/) are no more.  They are now maintained separately as
+   third-party plug-ins in their own repositories.
+
+ * "git gc --aggressive" learned "--depth" option and
+   "gc.aggressiveDepth" configuration variable to allow use of a less
+   insane depth than the built-in default value of 250.
+
+ * "git log" learned the "--show-linear-break" option to show where a
+   single strand-of-pearls is broken in its output.
+
+ * The "rev-parse --parseopt" mechanism used by scripted Porcelains to
+   parse command-line options and to give help text learned to take
+   the argv-help (the placeholder string for an option parameter,
+   e.g. "key-id" in "--gpg-sign=<key-id>").
+
+ * The pattern to find where the function begins in C/C++ used in
+   "diff" and "grep -p" has been updated to improve viewing C++
+   sources.
+
+ * "git rebase" learned to interpret a lone "-" as "@{-1}", the
+   branch that we were previously on.
+
+ * "git commit --cleanup=<mode>" learned a new mode, scissors.
+
+ * "git tag --list" output can be sorted using "version sort" with
+   "--sort=version:refname".
+
+ * Discard the accumulated "heuristics" to guess from which branch the
+   result wants to be pulled from and make sure that what the end user
+   specified is not second-guessed by "git request-pull", to avoid
+   mistakes.  When you pushed out your 'master' branch to your public
+   repository as 'for-linus', use the new "master:for-linus" syntax to
+   denote the branch to be pulled.
+
+ * "git grep" learned to behave in a way similar to native grep when
+   "-h" (no header) and "-c" (count) options are given.
+
+ * "git push" via transport-helper interface has been updated to
+   allow forced ref updates in a way similar to the natively
+   supported transports.
+
+ * The "simple" mode is the default for "git push".
+
+ * "git add -u" and "git add -A", when run without any pathspec, is a
+   tree-wide operation even when run inside a subdirectory of a
+   working tree.
+
+ * "git add <path>" is the same as "git add -A <path>" now.
+
+ * "core.statinfo" configuration variable, which is a
+   never-advertised synonym to "core.checkstat", has been removed.
+
+ * The "-q" option to "git diff-files", which does *NOT* mean
+   "quiet", has been removed (it told Git to ignore deletion, which
+   you can do with "git diff-files --diff-filter=d").
+
+ * Server operators can loosen the "tips of refs only" restriction for
+   the remote archive service with the uploadarchive.allowUnreachable
+   configuration option.
+
+ * The progress indicators from various time-consuming commands have
+   been marked for i18n/l10n.
+
+ * "git notes -C <blob>" diagnoses as an error an attempt to use an
+   object that is not a blob.
+
+ * "git config" learned to read from the standard input when "-" is
+   given as the value to its "--file" parameter (attempting an
+   operation to update the configuration in the standard input is
+   rejected, of course).
+
+ * Trailing whitespaces in .gitignore files, unless they are quoted
+   for fnmatch(3), e.g. "path\ ", are warned and ignored.  Strictly
+   speaking, this is a backward-incompatible change, but very unlikely
+   to bite any sane user and adjusting should be obvious and easy.
+
+ * Many commands that create commits, e.g. "pull" and "rebase",
+   learned to take the "--gpg-sign" option on the command line.
+
+ * "git commit" can be told to always GPG sign the resulting commit
+   by setting the "commit.gpgsign" configuration variable to "true"
+   (the command-line option "--no-gpg-sign" should override it).
+
+ * "git pull" can be told to only accept fast-forward by setting the
+   new "pull.ff" configuration variable.
+
+ * "git reset" learned the "-N" option, which does not reset the index
+   fully for paths the index knows about but the tree-ish the command
+   resets to does not (these paths are kept as intend-to-add entries).
+
+
+Performance, Internal Implementation, etc.
+
+ * The compilation options to port to AIX and to MSVC have been
+   updated.
+
+ * We started using wildmatch() in place of fnmatch(3) a few releases
+   ago; complete the process and stop using fnmatch(3).
+
+ * Uses of curl's "multi" interface and "easy" interface do not mix
+   well when we attempt to reuse outgoing connections.  Teach the RPC
+   over HTTP code, used in the smart HTTP transport, not to use the
+   "easy" interface.
+
+ * The bitmap-index feature from JGit has been ported, which should
+   significantly improve performance when serving objects from a
+   repository that uses it.
+
+ * The way "git log --cc" shows a combined diff against multiple
+   parents has been optimized.
+
+ * The prefixcmp() and suffixcmp() functions are gone.  Use
+   starts_with() and ends_with(), and also consider if skip_prefix()
+   suits your needs better when using the former.
+
+
+Also contains various documentation updates and code clean-ups.  Many
+of them came from flurry of activities as GSoC candidate microproject
+exercises.
+
+
+Fixes since v1.9 series
+-----------------------
+
+Unless otherwise noted, all the fixes since v1.9 in the maintenance
+track are contained in this release (see the maintenance releases'
+notes for details).
+
+ * "git p4" was broken in 1.9 release to deal with changes in binary
+   files.
+   (merge 749b668 cl/p4-use-diff-tree later to maint).
+
+ * The shell prompt script (in contrib/), when using the PROMPT_COMMAND
+   interface, used an unsafe construct when showing the branch name in
+   $PS1.
+   (merge 1e4119c8 rh/prompt-pcmode-avoid-eval-on-refname later to maint).
+
+ * "git rebase" used a POSIX shell construct FreeBSD's /bin/sh does not
+   work well with.
+   (merge 8cd6596 km/avoid-non-function-return-in-rebase later to maint).
+
+ * zsh prompt (in contrib/) leaked unnecessary error messages.
+
+ * Bash completion (in contrib/) did not complete the refs and remotes
+   correctly given "git pu<TAB>" when "pu" is aliased to "push".
+
+ * Some more Unicode code points, defined in Unicode 6.3 as having zero
+   width, have been taught to our display column counting logic.
+   (merge d813ab9 tb/unicode-6.3-zero-width later to maint).
+
+ * Some tests used shell constructs that did not work well on FreeBSD
+   (merge ff7a1c6 km/avoid-bs-in-shell-glob later to maint).
+   (merge 00764ca km/avoid-cp-a later to maint).
+
+ * "git update-ref --stdin" did not fail a request to create a ref
+   when the ref already existed.
+   (merge b9d56b5 mh/update-ref-batch-create-fix later to maint).
+
+ * "git diff --no-index -Mq a b" fell into an infinite loop.
+   (merge ad1c3fb jc/fix-diff-no-index-diff-opt-parse later to maint).
+
+ * "git fetch --prune", when the right-hand side of multiple fetch
+   refspecs overlap (e.g. storing "refs/heads/*" to
+   "refs/remotes/origin/*", while storing "refs/frotz/*" to
+   "refs/remotes/origin/fr/*"), aggressively thought that lack of
+   "refs/heads/fr/otz" on the origin site meant we should remove
+   "refs/remotes/origin/fr/otz" from us, without checking their
+   "refs/frotz/otz" first.
+
+   Note that such a configuration is inherently unsafe (think what
+   should happen when "refs/heads/fr/otz" does appear on the origin
+   site), but that is not a reason not to be extra careful.
+   (merge e6f6371 cn/fetch-prune-overlapping-destination later to maint).
+
+ * "git status --porcelain --branch" showed its output with labels
+   "ahead/behind/gone" translated to the user's locale.
+   (merge 7a76c28 mm/status-porcelain-format-i18n-fix later to maint).
+
+ * A stray environment variable $prefix could have leaked into and
+   affected the behaviour of the "subtree" script (in contrib/).
+
+ * When it is not necessary to edit a commit log message (e.g. "git
+   commit -m" is given a message without specifying "-e"), we used to
+   disable the spawning of the editor by overriding GIT_EDITOR, but
+   this means all the uses of the editor, other than to edit the
+   commit log message, are also affected.
+   (merge b549be0 bp/commit-p-editor later to maint).
+
+ * "git mv" that moves a submodule forgot to adjust the array that
+   uses to keep track of which submodules were to be moved to update
+   its configuration.
+   (merge fb8a4e8 jk/mv-submodules-fix later to maint).
+
+ * Length limit for the pathname used when removing a path in a deep
+   subdirectory has been removed to avoid buffer overflows.
+   (merge 2f29e0c mh/remove-subtree-long-pathname-fix later to maint).
+
+ * The test helper lib-terminal always run an actual test_expect_*
+   when included, which screwed up with the use of skil-all that may
+   have to be done later.
+   (merge 7e27173 jk/lib-terminal-lazy later to maint).
+
+ * "git index-pack" used a wrong variable to name the keep-file in an
+   error message when the file cannot be written or closed.
+   (merge de983a0 nd/index-pack-error-message later to maint).
+
+ * "rebase -i" produced a broken insn sheet when the title of a commit
+   happened to contain '\n' (or ended with '\c') due to a careless use
+   of 'echo'.
+   (merge cb1aefd us/printf-not-echo later to maint).
+
+ * There were a few instances of 'git-foo' remaining in the
+   documentation that should have been spelled 'git foo'.
+   (merge 3c3e6f5 rr/doc-merge-strategies later to maint).
+
+ * Serving objects from a shallow repository needs to write a
+   new file to hold the temporary shallow boundaries, but it was not
+   cleaned when we exit due to die() or a signal.
+   (merge 7839632 jk/shallow-update-fix later to maint).
+
+ * When "git stash pop" stops after failing to apply the stash
+   (e.g. due to conflicting changes), the stash is not dropped. State
+   that explicitly in the output to let the users know.
+   (merge 2d4c993 jc/stash-pop-not-popped later to maint).
+
+ * The labels in "git status" output that describe the nature of
+   conflicts (e.g. "both deleted") were limited to 20 bytes, which was
+   too short for some l10n (e.g. fr).
+   (merge c7cb333 jn/wt-status later to maint).
+
+ * "git clean -d pathspec" did not use the given pathspec correctly
+   and ended up cleaning too much.
+   (merge 1f2e108 jk/clean-d-pathspec later to maint).
+
+ * "git difftool" misbehaved when the repository is bound to the
+   working tree with the ".git file" mechanism, where a textual file
+   ".git" tells us where it is.
+   (merge fcfec8b da/difftool-git-files later to maint).
+
+ * "git push" did not pay attention to "branch.*.pushremote" if it is
+   defined earlier than "remote.pushdefault"; the order of these two
+   variables in the configuration file should not matter, but it did
+   by mistake.
+   (merge 98b406f jk/remote-pushremote-config-reading later to maint).
+
+ * Code paths that parse timestamps in commit objects have been
+   tightened.
+   (merge f80d1f9 jk/commit-dates-parsing-fix later to maint).
+
+ * "git diff --external-diff" incorrectly fed the submodule directory
+   in the working tree to the external diff driver when it knew that it
+   is the same as one of the versions being compared.
+   (merge aba4727 tr/diff-submodule-no-reuse-worktree later to maint).
+
+ * "git reset" needs to refresh the index when working in a working
+   tree (it can also be used to match the index to the HEAD in an
+   otherwise bare repository), but it failed to set up the working
+   tree properly, causing GIT_WORK_TREE to be ignored.
+   (merge b7756d4 nd/reset-setup-worktree later to maint).
+
+ * "git check-attr" when working on a repository with a working tree
+   did not work well when the working tree was specified via the
+   "--work-tree" (and obviously with "--git-dir") option.
+   (merge cdbf623 jc/check-attr-honor-working-tree later to maint).
+
+ * "merge-recursive" was broken in 1.7.7 era and stopped working in
+   an empty (temporary) working tree, when there are renames
+   involved.  This has been corrected.
+   (merge 6e2068a bk/refresh-missing-ok-in-merge-recursive later to maint.)
+
+ * "git rev-parse" was loose in rejecting command-line arguments
+   that do not make sense, e.g. "--default" without the required
+   value for that option.
+   (merge a43219f ds/rev-parse-required-args later to maint.)
+
+ * "include.path" variable (or any variable that expects a path that
+   can use ~username expansion) in the configuration file is not a
+   boolean, but the code failed to check it.
+   (merge 67beb60 jk/config-path-include-fix later to maint.)
+
+ * Commands that take pathspecs on the command line misbehaved when
+   the pathspec is given as an absolute pathname (which is a
+   practice not particularly encouraged) that points at a symbolic
+   link in the working tree.
+   (merge 6127ff6 mw/symlinks later to maint.)
+
+ * "git diff --quiet -- pathspec1 pathspec2" sometimes did not return
+   the correct status value.
+   (merge f34b205 nd/diff-quiet-stat-dirty later to maint.)
+
+ * Attempting to deepen a shallow repository by fetching over smart
+   HTTP transport failed in the protocol exchange, when the no-done
+   extension was used.  The fetching side waited for the list of
+   shallow boundary commits after the sending side stopped talking to
+   it.
+   (merge 0232852 nd/http-fetch-shallow-fix later to maint.)
+
+ * Allow "git cmd path/", when the 'path' is where a submodule is
+   bound to the top-level working tree, to match 'path', despite the
+   extra and unnecessary trailing slash (such a slash is often
+   given by command-line completion).
+   (merge 2e70c01 nd/submodule-pathspec-ending-with-slash later to maint.)
+
+ * Documentation and in-code comments had many instances of mistaken
+   use of "nor", which have been corrected.
+   (merge 235e8d5 jl/nor-or-nand-and later to maint).

Documentation/RelNotes/2.0.1.txt

@@ -0,0 +1,115 @@
+Git v2.0.1 Release Notes
+========================
+
+ * We used to unconditionally disable the pager in the pager process
+   we spawn to feed out output, but that prevented people who want to
+   run "less" within "less" from doing so.
+
+ * Tools that read diagnostic output in our standard error stream do
+   not want to see terminal control sequence (e.g. erase-to-eol).
+   Detect them by checking if the standard error stream is connected
+   to a tty.
+ * Reworded the error message given upon a failure to open an existing
+   loose object file due to e.g. permission issues; it was reported as
+   the object being corrupt, but that is not quite true.
+
+ * "git log -2master" is a common typo that shows two commits starting
+   from whichever random branch that is not 'master' that happens to
+   be checked out currently.
+
+ * The "%<(10,trunc)%s" pretty format specifier in the log family of
+   commands is used to truncate the string to a given length (e.g. 10
+   in the example) with padding to column-align the output, but did
+   not take into account that number of bytes and number of display
+   columns are different.
+
+ * The "mailmap.file" configuration option did not support the tilde
+   expansion (i.e. ~user/path and ~/path).
+
+ * The completion scripts (in contrib/) did not know about quite a few
+   options that are common between "git merge" and "git pull", and a
+   couple of options unique to "git merge".
+
+ * "--ignore-space-change" option of "git apply" ignored the spaces
+   at the beginning of line too aggressively, which is inconsistent
+   with the option of the same name "diff" and "git diff" have.
+
+ * "git blame" miscounted number of columns needed to show localized
+   timestamps, resulting in jaggy left-side-edge of the source code
+   lines in its output.
+
+ * "git blame" assigned the blame to the copy in the working-tree if
+   the repository is set to core.autocrlf=input and the file used CRLF
+   line endings.
+
+ * "git commit --allow-empty-message -C $commit" did not work when the
+   commit did not have any log message.
+
+ * "git diff --find-copies-harder" sometimes pretended as if the mode
+   bits have changed for paths that are marked with assume-unchanged
+   bit.
+
+ * "git format-patch" did not enforce the rule that the "--follow"
+   option from the log/diff family of commands must be used with
+   exactly one pathspec.
+
+ * "git gc --auto" was recently changed to run in the background to
+   give control back early to the end-user sitting in front of the
+   terminal, but it forgot that housekeeping involving reflogs should
+   be done without other processes competing for accesses to the refs.
+
+ * "git grep -O" to show the lines that hit in the pager did not work
+   well with case insensitive search.  We now spawn "less" with its
+   "-I" option when it is used as the pager (which is the default).
+
+ * We used to disable threaded "git index-pack" on platforms without
+   thread-safe pread(); use a different workaround for such
+   platforms to allow threaded "git index-pack".
+
+ * The error reporting from "git index-pack" has been improved to
+   distinguish missing objects from type errors.
+
+ * "git mailinfo" used to read beyond the end of header string while
+   parsing an incoming e-mail message to extract the patch.
+
+ * On a case insensitive filesystem, merge-recursive incorrectly
+   deleted the file that is to be renamed to a name that is the same
+   except for case differences.
+
+ * "git pack-objects" unnecessarily copied the previous contents when
+   extending the hashtable, even though it will populate the table
+   from scratch anyway.
+
+ * "git rerere forget" did not work well when merge.conflictstyle
+   was set to a non-default value.
+
+ * "git remote rm" and "git remote prune" can involve removing many
+   refs at once, which is not a very efficient thing to do when very
+   many refs exist in the packed-refs file.
+
+ * "git log --exclude=<glob> --all | git shortlog" worked as expected,
+   but "git shortlog --exclude=<glob> --all", which is supposed to be
+   identical to the above pipeline, was not accepted at the command
+   line argument parser level.
+
+ * The autostash mode of "git rebase -i" did not restore the dirty
+   working tree state if the user aborted the interactive rebase by
+   emptying the insn sheet.
+
+ * "git show -s" (i.e. show log message only) used to incorrectly emit
+   an extra blank line after a merge commit.
+
+ * "git status", even though it is a read-only operation, tries to
+   update the index with refreshed lstat(2) info to optimize future
+   accesses to the working tree opportunistically, but this could
+   race with a "read-write" operation that modify the index while it
+   is running.  Detect such a race and avoid overwriting the index.
+
+ * "git status" (and "git commit") behaved as if changes in a modified
+   submodule are not there if submodule.*.ignore configuration is set,
+   which was misleading.  The configuration is only to unclutter diff
+   output during the course of development, and should not to hide
+   changes in the "status" output to cause the users forget to commit
+   them.
+
+ * The mode to run tests with HTTP server tests disabled was broken.

Documentation/config.txt

@@ -131,8 +131,13 @@ Variables
 
 Note that this list is non-comprehensive and not necessarily complete.
 For command-specific variables, you will find a more detailed description
-in the appropriate manual page. You will find a description of non-core
-porcelain configuration variables in the respective porcelain documentation.
+in the appropriate manual page.
+
+Other git-related tools may and do use their own variables.  When
+inventing new variables for use in your own tool, make sure their
+names do not conflict with those that are used by Git itself and
+other popular tools, and describe them in your documentation.
+
 
 advice.*::
 	These variables control various optional help messages designed to
@@ -142,19 +147,13 @@ advice.*::
 --
 	pushUpdateRejected::
 		Set this variable to 'false' if you want to disable
-		'pushNonFFCurrent', 'pushNonFFDefault',
+		'pushNonFFCurrent',
 		'pushNonFFMatching', 'pushAlreadyExists',
 		'pushFetchFirst', and 'pushNeedsForce'
 		simultaneously.
 	pushNonFFCurrent::
 		Advice shown when linkgit:git-push[1] fails due to a
 		non-fast-forward update to the current branch.
-	pushNonFFDefault::
-		Advice to set 'push.default' to 'upstream' or 'current'
-		when you ran linkgit:git-push[1] and pushed 'matching
-		refs' by default (i.e. you did not provide an explicit
-		refspec, and no 'push.default' configuration was set)
-		and it resulted in a non-fast-forward error.
 	pushNonFFMatching::
 		Advice shown when you ran linkgit:git-push[1] and pushed
 		'matching refs' explicitly (i.e. you used ':', or
@@ -992,6 +991,14 @@ commit.cleanup::
 	have to remove the help lines that begin with `#` in the commit log
 	template yourself, if you do this).
 
+commit.gpgsign::
+
+	A boolean to specify whether all commits should be GPG signed.
+	Use of this option when doing operations such as rebase can
+	result in a large number of commits being signed. It may be
+	convenient to use an agent to avoid typing your GPG passphrase
+	several times.
+
 commit.status::
 	A boolean to enable/disable inclusion of status information in the
 	commit message template when using an editor to prepare the commit
@@ -1149,6 +1156,11 @@ filter.<driver>.smudge::
 	object to a worktree file upon checkout.  See
 	linkgit:gitattributes[5] for details.
 
+gc.aggressiveDepth::
+	The depth parameter used in the delta compression
+	algorithm used by 'git gc --aggressive'.  This defaults
+	to 250.
+
 gc.aggressiveWindow::
 	The window size parameter used in the delta compression
 	algorithm used by 'git gc --aggressive'.  This defaults
@@ -1167,6 +1179,10 @@ gc.autopacklimit::
 	--auto` consolidates them into one larger pack.  The
 	default	value is 50.  Setting this to 0 disables it.
 
+gc.autodetach::
+	Make `git gc --auto` return immediately andrun in background
+	if the system supports it. Default is true.
+
 gc.packrefs::
 	Running `git pack-refs` in a repository renders it
 	unclonable by Git versions prior to 1.5.1.2 over dumb
@@ -1324,6 +1340,10 @@ gui.diffcontext::
 	Specifies how many context lines should be used in calls to diff
 	made by the linkgit:git-gui[1]. The default is "5".
 
+gui.displayuntracked::
+	Determines if linkgit::git-gui[1] shows untracked files
+	in the file list. The default is "true".
+
 gui.encoding::
 	Specifies the default encoding to use for displaying of
 	file contents in linkgit:git-gui[1] and linkgit:gitk[1].
@@ -1601,6 +1621,10 @@ imap::
 	The configuration variables in the 'imap' section are described
 	in linkgit:git-imap-send[1].
 
+index.version::
+	Specify the version with which new index files should be
+	initialized.  This does not affect existing repositories.
+
 init.templatedir::
 	Specify the directory from which templates will be copied.
 	(See the "TEMPLATE DIRECTORY" section of linkgit:git-init[1].)
@@ -1633,7 +1657,7 @@ interactive.singlekey::
 	linkgit:git-add[1], linkgit:git-checkout[1], linkgit:git-commit[1],
 	linkgit:git-reset[1], and linkgit:git-stash[1]. Note that this
 	setting is silently ignored if portable keystroke input
-	is not available.
+	is not available; requires the Perl module Term::ReadKey.
 
 log.abbrevCommit::
 	If true, makes linkgit:git-log[1], linkgit:git-show[1], and
@@ -1862,6 +1886,31 @@ pack.packSizeLimit::
 	Common unit suffixes of 'k', 'm', or 'g' are
 	supported.
 
+pack.useBitmaps::
+	When true, git will use pack bitmaps (if available) when packing
+	to stdout (e.g., during the server side of a fetch). Defaults to
+	true. You should not generally need to turn this off unless
+	you are debugging pack bitmaps.
+
+pack.writebitmaps::
+	When true, git will write a bitmap index when packing all
+	objects to disk (e.g., when `git repack -a` is run).  This
+	index can speed up the "counting objects" phase of subsequent
+	packs created for clones and fetches, at the cost of some disk
+	space and extra time spent on the initial repack.  Defaults to
+	false.
+
+pack.writeBitmapHashCache::
+	When true, git will include a "hash cache" section in the bitmap
+	index (if one is written). This cache can be used to feed git's
+	delta heuristics, potentially leading to better deltas between
+	bitmapped and non-bitmapped objects (e.g., when serving a fetch
+	between an older, bitmapped pack and objects that have been
+	pushed since the last gc). The downside is that it consumes 4
+	bytes per object of disk space, and that JGit's bitmap
+	implementation does not understand it, causing it to complain if
+	Git and JGit are used on the same repository. Defaults to false.
+
 pager.<cmd>::
 	If the value is boolean, turns on or off pagination of the
 	output of a particular Git subcommand when writing to a tty.
@@ -1881,6 +1930,16 @@ pretty.<name>::
 	Note that an alias with the same name as a built-in format
 	will be silently ignored.
 
+pull.ff::
+	By default, Git does not create an extra merge commit when merging
+	a commit that is a descendant of the current commit. Instead, the
+	tip of the current branch is fast-forwarded. When set to `false`,
+	this variable tells Git to create an extra merge commit in such
+	a case (equivalent to giving the `--no-ff` option from the command
+	line). When set to `only`, only such fast-forward merges are
+	allowed (equivalent to giving the `--ff-only` option from the
+	command line).
+
 pull.rebase::
 	When true, rebase branches on top of the fetched branch, instead
 	of merging the default branch from the default remote when "git
@@ -1933,7 +1992,7 @@ When pushing to a remote that is different from the remote you normally
 pull from, work as `current`.  This is the safest option and is suited
 for beginners.
 +
-This mode will become the default in Git 2.0.
+This mode has become the default in Git 2.0.
 
 * `matching` - push all branches having the same name on both ends.
   This makes the repository you are pushing to remember the set of
@@ -1952,8 +2011,8 @@ suitable for pushing into a shared central repository, as other
 people may add new branches there, or update the tip of existing
 branches outside your control.
 +
-This is currently the default, but Git 2.0 will change the default
-to `simple`.
+This used to be the default, but not since Git 2.0 (`simple` is the
+new default).
 
 --
 
@@ -2111,6 +2170,13 @@ repack.usedeltabaseoffset::
 	"false" and repack. Access from old Git versions over the
 	native protocol are unaffected by this option.
 
+repack.packKeptObjects::
+	If set to true, makes `git repack` act as if
+	`--pack-kept-objects` was passed. See linkgit:git-repack[1] for
+	details. Defaults to `false` normally, but `true` if a bitmap
+	index is being written (either via `--write-bitmap-index` or
+	`pack.writeBitmaps`).
+
 rerere.autoupdate::
 	When set to true, `git-rerere` updates the index with the
 	resulting contents after it cleanly resolves conflicts using
@@ -2227,7 +2293,9 @@ status.submodulesummary::
 	--summary-limit option of linkgit:git-submodule[1]). Please note
 	that the summary output command will be suppressed for all
 	submodules when `diff.ignoreSubmodules` is set to 'all' or only
-	for those submodules where `submodule.<name>.ignore=all`. To
+	for those submodules where `submodule.<name>.ignore=all`. The only
+	exception to that rule is that status and commit will show staged
+	submodule changes. To
 	also view the summary for ignored submodules you can either use
 	the --ignore-submodules=dirty command line option or the 'git
 	submodule summary' command, which shows a similar output but does
@@ -2258,7 +2326,9 @@ submodule.<name>.fetchRecurseSubmodules::
 submodule.<name>.ignore::
 	Defines under what circumstances "git status" and the diff family show
 	a submodule as modified. When set to "all", it will never be considered
-	modified, "dirty" will ignore all changes to the submodules work tree and
+	modified (but it will nonetheless show up in the output of status and
+	commit when it has been staged), "dirty" will ignore all changes
+	to the submodules work tree and
 	takes only differences between the HEAD of the submodule and the commit
 	recorded in the superproject into account. "untracked" will additionally
 	let submodules with modified tracked files in their work tree show up.
@@ -2291,6 +2361,13 @@ transfer.unpackLimit::
 	not set, the value of this variable is used instead.
 	The default value is 100.
 
+uploadarchive.allowUnreachable::
+	If true, allow clients to use `git archive --remote` to request
+	any tree, whether reachable from the ref tips or not. See the
+	discussion in the `SECURITY` section of
+	linkgit:git-upload-archive[1] for more details. Defaults to
+	`false`.
+
 uploadpack.hiderefs::
 	String(s) `upload-pack` uses to decide which refs to omit
 	from its initial advertisement.  Use more than one

Documentation/git-add.txt

@@ -53,8 +53,14 @@ OPTIONS
 	Files to add content from.  Fileglobs (e.g. `*.c`) can
 	be given to add all matching files.  Also a
 	leading directory name (e.g. `dir` to add `dir/file1`
-	and `dir/file2`) can be given to add all files in the
-	directory, recursively.
+	and `dir/file2`) can be given to update the index to
+	match the current state of the directory as a whole (e.g.
+	specifying `dir` will record not just a file `dir/file1`
+	modified in the working tree, a file `dir/file2` added to
+	the working tree, but also a file `dir/file3` removed from
+	the working tree.  Note that older versions of Git used
+	to ignore removed files; use `--no-all` option if you want
+	to add modified or new files but ignore removed	ones.
 
 -n::
 --dry-run::
@@ -104,10 +110,10 @@ apply to the index. See EDITING PATCHES below.
 	<pathspec>.  This removes as well as modifies index entries to
 	match the working tree, but adds no new files.
 +
-If no <pathspec> is given, the current version of Git defaults to
-"."; in other words, update all tracked files in the current directory
-and its subdirectories. This default will change in a future version
-of Git, hence the form without <pathspec> should not be used.
+If no <pathspec> is given when `-u` option is used, all
+tracked files in the entire working tree are updated (old versions
+of Git used to limit the update to the current directory and its
+subdirectories).
 
 -A::
 --all::
@@ -117,10 +123,10 @@ of Git, hence the form without <pathspec> should not be used.
 	entry.	This adds, modifies, and removes index entries to
 	match the working tree.
 +
-If no <pathspec> is given, the current version of Git defaults to
-"."; in other words, update all files in the current directory
-and its subdirectories. This default will change in a future version
-of Git, hence the form without <pathspec> should not be used.
+If no <pathspec> is given when `-A` option is used, all
+files in the entire working tree are updated (old versions
+of Git used to limit the update to the current directory and its
+subdirectories).
 
 --no-all::
 --ignore-removal::
@@ -129,11 +135,9 @@ of Git, hence the form without <pathspec> should not be used.
 	files that have been removed from the working tree.  This
 	option is a no-op when no <pathspec> is used.
 +
-This option is primarily to help the current users of Git, whose
-"git add <pathspec>..." ignores removed files.  In future versions
-of Git, "git add <pathspec>..." will be a synonym to "git add -A
-<pathspec>..." and "git add --ignore-removal <pathspec>..." will behave like
-today's "git add <pathspec>...", ignoring removed files.
+This option is primarily to help users who are used to older
+versions of Git, whose "git add <pathspec>..." was a synonym
+for "git add --no-all <pathspec>...", i.e. ignored removed files.
 
 -N::
 --intent-to-add::

Documentation/git-am.txt

@@ -14,7 +14,7 @@ SYNOPSIS
 	 [--ignore-date] [--ignore-space-change | --ignore-whitespace]
 	 [--whitespace=<option>] [-C<n>] [-p<n>] [--directory=<dir>]
 	 [--exclude=<path>] [--include=<path>] [--reject] [-q | --quiet]
-	 [--[no-]scissors]
+	 [--[no-]scissors] [-S[<keyid>]] [--patch-format=<format>]
 	 [(<mbox> | <Maildir>)...]
 'git am' (--continue | --skip | --abort)
 
@@ -97,6 +97,12 @@ default.   You can use `--no-utf8` to override this.
 	program that applies
 	the patch.
 
+--patch-format::
+	By default the command will try to detect the patch format
+	automatically. This option allows the user to bypass the automatic
+	detection and specify the patch format that the patch(es) should be
+	interpreted as. Valid formats are mbox, stgit, stgit-series and hg.
+
 -i::
 --interactive::
 	Run interactively.
@@ -119,6 +125,10 @@ default.   You can use `--no-utf8` to override this.
 	Skip the current patch.  This is only meaningful when
 	restarting an aborted patch.
 
+-S[<keyid>]::
+--gpg-sign[=<keyid>]::
+	GPG-sign commits.
+
 --continue::
 -r::
 --resolved::
@@ -189,6 +199,11 @@ commits, like running 'git am' on the wrong branch or an error in the
 commits that is more easily fixed by changing the mailbox (e.g.
 errors in the "From:" lines).
 
+HOOKS
+-----
+This command can run `applypatch-msg`, `pre-applypatch`,
+and `post-applypatch` hooks.  See linkgit:githooks[5] for more
+information.
 
 SEE ALSO
 --------

Documentation/git-archive.txt

@@ -65,7 +65,10 @@ OPTIONS
 
 --remote=<repo>::
 	Instead of making a tar archive from the local repository,
-	retrieve a tar archive from a remote repository.
+	retrieve a tar archive from a remote repository. Note that the
+	remote repository may place restrictions on which sha1
+	expressions may be allowed in `<tree-ish>`. See
+	linkgit:git-upload-archive[1] for details.
 
 --exec=<git-upload-archive>::
 	Used with --remote to specify the path to the

Documentation/git-blame.txt

@@ -35,7 +35,8 @@ Apart from supporting file annotation, Git also supports searching the
 development history for when a code snippet occurred in a change. This makes it
 possible to track when a code snippet was added to a file, moved or copied
 between files, and eventually deleted or replaced. It works by searching for
-a text string in the diff. A small example:
+a text string in the diff. A small example of the pickaxe interface
+that searches for `blame_usage`:
 
 -----------------------------------------------------------------------------
 $ git log --pretty=oneline -S'blame_usage'

Documentation/git-cherry-pick.txt

@@ -8,7 +8,8 @@ git-cherry-pick - Apply the changes introduced by some existing commits
 SYNOPSIS
 --------
 [verse]
-'git cherry-pick' [--edit] [-n] [-m parent-number] [-s] [-x] [--ff] <commit>...
+'git cherry-pick' [--edit] [-n] [-m parent-number] [-s] [-x] [--ff]
+		  [-S[<key-id>]] <commit>...
 'git cherry-pick' --continue
 'git cherry-pick' --quit
 'git cherry-pick' --abort
@@ -100,6 +101,10 @@ effect to your index in a row.
 --signoff::
 	Add Signed-off-by line at the end of the commit message.
 
+-S[<key-id>]::
+--gpg-sign[=<key-id>]::
+	GPG-sign commits.
+
 --ff::
 	If the current HEAD is the same as the parent of the
 	cherry-pick'ed commit, then a fast forward to this commit will

Documentation/git-clone.txt

@@ -55,15 +55,12 @@ repository is specified as a URL, then this flag is ignored (and we
 never use the local optimizations).  Specifying `--no-local` will
 override the default when `/path/to/repo` is given, using the regular
 Git transport instead.
-+
-To force copying instead of hardlinking (which may be desirable if you
-are trying to make a back-up of your repository), but still avoid the
-usual "Git aware" transport mechanism, `--no-hardlinks` can be used.
 
 --no-hardlinks::
-	Optimize the cloning process from a repository on a
-	local filesystem by copying files under `.git/objects`
-	directory.
+	Force the cloning process from a repository on a local
+	filesystem to copy the files under the `.git/objects`
+	directory instead of using hardlinks. This may be desirable
+	if you are trying to make a back-up of your repository.
 
 --shared::
 -s::

Documentation/git-commit-tree.txt

@@ -55,8 +55,13 @@ OPTIONS
 	from the standard input.
 
 -S[<keyid>]::
+--gpg-sign[=<keyid>]::
 	GPG-sign commit.
 
+--no-gpg-sign::
+	Countermand `commit.gpgsign` configuration variable that is
+	set to force each and every commit to be signed.
+
 
 Commit Information
 ------------------

Documentation/git-commit.txt

@@ -13,7 +13,7 @@ SYNOPSIS
 	   [-F <file> | -m <msg>] [--reset-author] [--allow-empty]
 	   [--allow-empty-message] [--no-verify] [-e] [--author=<author>]
 	   [--date=<date>] [--cleanup=<mode>] [--[no-]status]
-	   [-i | -o] [-S[<keyid>]] [--] [<file>...]
+	   [-i | -o] [-S[<key-id>]] [--] [<file>...]
 
 DESCRIPTION
 -----------
@@ -176,7 +176,7 @@ OPTIONS
 --cleanup=<mode>::
 	This option determines how the supplied commit message should be
 	cleaned up before committing.  The '<mode>' can be `strip`,
-	`whitespace`, `verbatim`, or `default`.
+	`whitespace`, `verbatim`, `scissors` or `default`.
 +
 --
 strip::
@@ -186,6 +186,12 @@ whitespace::
 	Same as `strip` except #commentary is not removed.
 verbatim::
 	Do not change the message at all.
+scissors::
+	Same as `whitespace`, except that everything from (and
+	including) the line
+	"`# ------------------------ >8 ------------------------`"
+	is truncated if the message is to be edited. "`#`" can be
+	customized with core.commentChar.
 default::
 	Same as `strip` if the message is to be edited.
 	Otherwise `whitespace`.
@@ -302,6 +308,10 @@ configuration variable documented in linkgit:git-config[1].
 --gpg-sign[=<keyid>]::
 	GPG-sign commit.
 
+--no-gpg-sign::
+	Countermand `commit.gpgsign` configuration variable that is
+	set to force each and every commit to be signed.
+
 \--::
 	Do not interpret any more arguments as options.
 

Documentation/git-cvsimport.txt

@@ -21,8 +21,8 @@ DESCRIPTION
 *WARNING:* `git cvsimport` uses cvsps version 2, which is considered
 deprecated; it does not work with cvsps version 3 and later.  If you are
 performing a one-shot import of a CVS repository consider using
-link:http://cvs2svn.tigris.org/cvs2git.html[cvs2git] or
-link:https://github.com/BartMassey/parsecvs[parsecvs].
+http://cvs2svn.tigris.org/cvs2git.html[cvs2git] or
+https://github.com/BartMassey/parsecvs[parsecvs].
 
 Imports a CVS repository into Git. It will either create a new
 repository, or incrementally import into an existing one.

Documentation/git-filter-branch.txt

@@ -436,7 +436,7 @@ git-filter-branch allows you to make complex shell-scripted rewrites
 of your Git history, but you probably don't need this flexibility if
 you're simply _removing unwanted data_ like large files or passwords.
 For those operations you may want to consider
-link:http://rtyley.github.io/bfg-repo-cleaner/[The BFG Repo-Cleaner],
+http://rtyley.github.io/bfg-repo-cleaner/[The BFG Repo-Cleaner],
 a JVM-based alternative to git-filter-branch, typically at least
 10-50x faster for those use-cases, and with quite different
 characteristics:
@@ -455,7 +455,7 @@ characteristics:
   _is_ possible to write filters that include their own parallellism,
   in the scripts executed against each commit.
 
-* The link:http://rtyley.github.io/bfg-repo-cleaner/#examples[command options]
+* The http://rtyley.github.io/bfg-repo-cleaner/#examples[command options]
   are much more restrictive than git-filter branch, and dedicated just
   to the tasks of removing unwanted data- e.g:
   `--strip-blobs-bigger-than 1M`.

Documentation/git-gc.txt

@@ -124,6 +124,9 @@ the value, the more time is spent optimizing the delta compression.  See
 the documentation for the --window' option in linkgit:git-repack[1] for
 more details.  This defaults to 250.
 
+Similarly, the optional configuration variable 'gc.aggressiveDepth'
+controls --depth option in linkgit:git-repack[1]. This defaults to 250.
+
 The optional configuration variable 'gc.pruneExpire' controls how old
 the unreferenced loose objects have to be before they are pruned.  The
 default is "2 weeks ago".

Documentation/git-merge.txt

@@ -10,7 +10,7 @@ SYNOPSIS
 --------
 [verse]
 'git merge' [-n] [--stat] [--no-commit] [--squash] [--[no-]edit]
-	[-s <strategy>] [-X <strategy-option>] [-S[<keyid>]]
+	[-s <strategy>] [-X <strategy-option>] [-S[<key-id>]]
 	[--[no-]rerere-autoupdate] [-m <msg>] [<commit>...]
 'git merge' <msg> HEAD <commit>...
 'git merge' --abort

Documentation/git-notes.txt

@@ -14,7 +14,7 @@ SYNOPSIS
 'git notes' append [-F <file> | -m <msg> | (-c | -C) <object>] [<object>]
 'git notes' edit [<object>]
 'git notes' show [<object>]
-'git notes' merge [-v | -q] [-s <strategy> ] <notes_ref>
+'git notes' merge [-v | -q] [-s <strategy> ] <notes-ref>
 'git notes' merge --commit [-v | -q]
 'git notes' merge --abort [-v | -q]
 'git notes' remove [--ignore-missing] [--stdin] [<object>...]

Documentation/git-pack-objects.txt

@@ -64,6 +64,8 @@ base-name::
 	the same way as 'git rev-list' with the `--objects` flag
 	uses its `commit` arguments to build the list of objects it
 	outputs.  The objects on the resulting list are packed.
+	Besides revisions, `--not` or `--shallow <SHA-1>` lines are
+	also accepted.
 
 --unpacked::
 	This implies `--revs`.  When processing the list of

Documentation/git-push.txt

@@ -83,8 +83,8 @@ the local side, the remote side is updated if a branch of the same name
 already exists on the remote side.
 
 --all::
-	Instead of naming each ref to push, specifies that all
-	refs under `refs/heads/` be pushed.
+	Push all branches (i.e. refs under `refs/heads/`); cannot be
+	used with other <refspec>.
 
 --prune::
 	Remove remote branches that don't have a local counterpart. For example
@@ -442,8 +442,10 @@ Examples
 	configured for the current branch).
 
 `git push origin`::
-	Without additional configuration, works like
-	`git push origin :`.
+	Without additional configuration, pushes the current branch to
+	the configured upstream (`remote.origin.merge` configuration
+	variable) if it has the same name as the current branch, and
+	errors out without pushing otherwise.
 +
 The default behavior of this command when no <refspec> is given can be
 configured by setting the `push` option of the remote, or the `push.default`

Documentation/git-rebase.txt

@@ -281,6 +281,10 @@ which makes little sense.
 	specified, `-s recursive`.  Note the reversal of 'ours' and
 	'theirs' as noted above for the `-m` option.
 
+-S[<keyid>]::
+--gpg-sign[=<keyid>]::
+	GPG-sign commits.
+
 -q::
 --quiet::
 	Be quiet. Implies --no-stat.

Documentation/git-remote.txt

@@ -3,7 +3,7 @@ git-remote(1)
 
 NAME
 ----
-git-remote - manage set of tracked repositories
+git-remote - Manage set of tracked repositories
 
 
 SYNOPSIS

Documentation/git-repack.txt

@@ -9,7 +9,7 @@ git-repack - Pack unpacked objects in a repository
 SYNOPSIS
 --------
 [verse]
-'git repack' [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [--window=<n>] [--depth=<n>]
+'git repack' [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [-b] [--window=<n>] [--depth=<n>]
 
 DESCRIPTION
 -----------
@@ -110,6 +110,21 @@ other objects in that pack they already have locally.
 	The default is unlimited, unless the config variable
 	`pack.packSizeLimit` is set.
 
+-b::
+--write-bitmap-index::
+	Write a reachability bitmap index as part of the repack. This
+	only makes sense when used with `-a` or `-A`, as the bitmaps
+	must be able to refer to all reachable objects. This option
+	overrides the setting of `pack.writebitmaps`.
+
+--pack-kept-objects::
+	Include objects in `.keep` files when repacking.  Note that we
+	still do not delete `.keep` packs after `pack-objects` finishes.
+	This means that we may duplicate objects, but this makes the
+	option safe to use when there are concurrent pushes or fetches.
+	This option is generally only useful if you are writing bitmaps
+	with `-b` or `pack.writebitmaps`, as it ensures that the
+	bitmapped packfile has the necessary objects.
 
 Configuration
 -------------

Documentation/git-request-pull.txt

@@ -13,22 +13,65 @@ SYNOPSIS
 DESCRIPTION
 -----------
 
-Summarizes the changes between two commits to the standard output, and includes
-the given URL in the generated summary.
+Generate a request asking your upstream project to pull changes into
+their tree.  The request, printed to the standard output, summarizes
+the changes and indicates from where they can be pulled.
+
+The upstream project is expected to have the commit named by
+`<start>` and the output asks it to integrate the changes you made
+since that commit, up to the commit named by `<end>`, by visiting
+the repository named by `<url>`.
+
 
 OPTIONS
 -------
 -p::
-	Show patch text
+	Include patch text in the output.
 
 <start>::
-	Commit to start at.
+	Commit to start at.  This names a commit that is already in
+	the upstream history.
 
 <url>::
-	URL to include in the summary.
+	The repository URL to be pulled from.
 
 <end>::
-	Commit to end at; defaults to HEAD.
+	Commit to end at (defaults to HEAD).  This names the commit
+	at the tip of the history you are asking to be pulled.
++
+When the repository named by `<url>` has the commit at a tip of a
+ref that is different from the ref you have locally, you can use the
+`<local>:<remote>` syntax, to have its local name, a colon `:`, and
+its remote name.
+
+
+EXAMPLE
+-------
+
+Imagine that you built your work on your `master` branch on top of
+the `v1.0` release, and want it to be integrated to the project.
+First you push that change to your public repository for others to
+see:
+
+	git push https://git.ko.xz/project master
+
+Then, you run this command:
+
+	git request-pull v1.0 https://git.ko.xz/project master
+
+which will produce a request to the upstream, summarizing the
+changes between the `v1.0` release and your `master`, to pull it
+from your public repository.
+
+If you pushed your change to a branch whose name is different from
+the one you have locally, e.g.
+
+	git push https://git.ko.xz/project master:for-linus
+
+then you can ask that to be pulled with
+
+	git request-pull v1.0 https://git.ko.xz/project master:for-linus
+
 
 GIT
 ---

Documentation/git-reset.txt

@@ -10,7 +10,7 @@ SYNOPSIS
 [verse]
 'git reset' [-q] [<tree-ish>] [--] <paths>...
 'git reset' (--patch | -p) [<tree-ish>] [--] [<paths>...]
-'git reset' [--soft | --mixed | --hard | --merge | --keep] [-q] [<commit>]
+'git reset' [--soft | --mixed [-N] | --hard | --merge | --keep] [-q] [<commit>]
 
 DESCRIPTION
 -----------
@@ -60,6 +60,9 @@ section of linkgit:git-add[1] to learn how to operate the `--patch` mode.
 	Resets the index but not the working tree (i.e., the changed files
 	are preserved but not marked for commit) and reports what has not
 	been updated. This is the default action.
++
+If `-N` is specified, removed paths are marked as intent-to-add (see
+linkgit:git-add[1]).
 
 --hard::
 	Resets the index and working tree. Any changes to tracked files in the

Documentation/git-rev-list.txt

@@ -55,6 +55,7 @@ SYNOPSIS
 	     [ \--reverse ]
 	     [ \--walk-reflogs ]
 	     [ \--no-walk ] [ \--do-walk ]
+	     [ \--use-bitmap-index ]
 	     <commit>... [ \-- <paths>... ]
 
 DESCRIPTION

Documentation/git-rev-parse.txt

@@ -284,20 +284,20 @@ Input Format
 
 'git rev-parse --parseopt' input format is fully text based. It has two parts,
 separated by a line that contains only `--`. The lines before the separator
-(should be more than one) are used for the usage.
+(should be one or more) are used for the usage.
 The lines after the separator describe the options.
 
 Each line of options has this format:
 
 ------------
-<opt_spec><flags>* SP+ help LF
+<opt-spec><flags>*<arg-hint>? SP+ help LF
 ------------
 
-`<opt_spec>`::
+`<opt-spec>`::
 	its format is the short option character, then the long option name
 	separated by a comma. Both parts are not required, though at least one
 	is necessary. `h,help`, `dry-run` and `f` are all three correct
-	`<opt_spec>`.
+	`<opt-spec>`.
 
 `<flags>`::
 	`<flags>` are of `*`, `=`, `?` or `!`.
@@ -313,6 +313,12 @@ Each line of options has this format:
 
 	* Use `!` to not make the corresponding negated long option available.
 
+`<arg-hint>`::
+	`<arg-hint>`, if specified, is used as a name of the argument in the
+	help output, for options that take arguments. `<arg-hint>` is
+	terminated by the first whitespace.  It is customary to use a
+	dash to separate words in a multi-word argument hint.
+
 The remainder of the line, after stripping the spaces, is used
 as the help associated to the option.
 
@@ -333,6 +339,8 @@ h,help    show the help
 
 foo       some nifty option --foo
 bar=      some cool option --bar with an argument
+baz=arg   another cool option --baz with a named argument
+qux?path  qux may take a path argument but has meaning by itself
 
   An option group Header
 C?        option C with an optional argument"
@@ -340,6 +348,28 @@ C?        option C with an optional argument"
 eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)"
 ------------
 
+
+Usage text
+~~~~~~~~~~
+
+When `"$@"` is `-h` or `--help` in the above example, the following
+usage text would be shown:
+
+------------
+usage: some-command [options] <args>...
+
+    some-command does foo and bar!
+
+    -h, --help            show the help
+    --foo                 some nifty option --foo
+    --bar ...             some cool option --bar with an argument
+    --baz <arg>           another cool option --baz with a named argument
+    --qux[=<path>]        qux may take a path argument but has meaning by itself
+
+An option group Header
+    -C[...]               option C with an optional argument
+------------
+
 SQ-QUOTE
 --------
 

Documentation/git-revert.txt

@@ -8,7 +8,7 @@ git-revert - Revert some existing commits
 SYNOPSIS
 --------
 [verse]
-'git revert' [--[no-]edit] [-n] [-m parent-number] [-s] <commit>...
+'git revert' [--[no-]edit] [-n] [-m parent-number] [-s] [-S[<key-id>]] <commit>...
 'git revert' --continue
 'git revert' --quit
 'git revert' --abort
@@ -80,6 +80,10 @@ more details.
 This is useful when reverting more than one commits'
 effect to your index in a row.
 
+-S[<key-id>]::
+--gpg-sign[=<key-id>]::
+	GPG-sign commits.
+
 -s::
 --signoff::
 	Add Signed-off-by line at the end of the commit message.

Documentation/git-stash.txt

@@ -44,7 +44,7 @@ is also possible).
 OPTIONS
 -------
 
-save [-p|--patch] [--[no-]keep-index] [-u|--include-untracked] [-a|--all] [-q|--quiet] [<message>]::
+save [-p|--patch] [-k|--[no-]keep-index] [-u|--include-untracked] [-a|--all] [-q|--quiet] [<message>]::
 
 	Save your local modifications to a new 'stash', and run `git reset
 	--hard` to revert them.  The <message> part is optional and gives

Documentation/git-status.txt

@@ -97,7 +97,7 @@ configuration variable documented in linkgit:git-config[1].
 OUTPUT
 ------
 The output from this command is designed to be used as a commit
-template comment, and all the output lines are prefixed with '#'.
+template comment.
 The default, long format, is designed to be human readable,
 verbose and descriptive.  Its contents and format are subject to change
 at any time.

Documentation/git-submodule.txt

@@ -15,8 +15,8 @@ SYNOPSIS
 'git submodule' [--quiet] init [--] [<path>...]
 'git submodule' [--quiet] deinit [-f|--force] [--] <path>...
 'git submodule' [--quiet] update [--init] [--remote] [-N|--no-fetch]
-	      [-f|--force] [--rebase] [--reference <repository>] [--depth <depth>]
-	      [--merge] [--recursive] [--] [<path>...]
+	      [-f|--force] [--rebase|--merge] [--reference <repository>]
+	      [--depth <depth>] [--recursive] [--] [<path>...]
 'git submodule' [--quiet] summary [--cached|--files] [(-n|--summary-limit) <n>]
 	      [commit] [--] [<path>...]
 'git submodule' [--quiet] foreach [--recursive] <command>
@@ -229,7 +229,7 @@ OPTIONS
 -b::
 --branch::
 	Branch of repository to add as submodule.
-	The name of the branch is recorded as `submodule.<path>.branch` in
+	The name of the branch is recorded as `submodule.<name>.branch` in
 	`.gitmodules` for `update --remote`.
 
 -f::
@@ -281,12 +281,31 @@ In order to ensure a current tracking branch state, `update --remote`
 fetches the submodule's remote repository before calculating the
 SHA-1.  If you don't want to fetch, you should use `submodule update
 --remote --no-fetch`.
++
+Use this option to integrate changes from the upstream subproject with
+your submodule's current HEAD.  Alternatively, you can run `git pull`
+from the submodule, which is equivalent except for the remote branch
+name: `update --remote` uses the default upstream repository and
+`submodule.<name>.branch`, while `git pull` uses the submodule's
+`branch.<name>.merge`.  Prefer `submodule.<name>.branch` if you want
+to distribute the default upstream branch with the superproject and
+`branch.<name>.merge` if you want a more native feel while working in
+the submodule itself.
 
 -N::
 --no-fetch::
 	This option is only valid for the update command.
 	Don't fetch new objects from the remote site.
 
+--checkout::
+	This option is only valid for the update command.
+	Checkout the commit recorded in the superproject on a detached HEAD
+	in the submodule. This is the default behavior, the main use of
+	this option is to override `submodule.$name.update` when set to
+	`merge`, `rebase` or `none`.
+	If the key `submodule.$name.update` is either not explicitly set or
+	set to `checkout`, this option is implicit.
+
 --merge::
 	This option is only valid for the update command.
 	Merge the commit recorded in the superproject into the current branch

Documentation/git-svn.txt

@@ -86,13 +86,14 @@ COMMANDS
 	(refs/remotes/$remote/*). Setting a prefix is also useful
 	if you wish to track multiple projects that share a common
 	repository.
+	By default, the prefix is set to 'origin/'.
 +
-NOTE: In Git v2.0, the default prefix will CHANGE from "" (no prefix)
-to "origin/". This is done to put SVN-tracking refs at
-"refs/remotes/origin/*" instead of "refs/remotes/*", and make them
-more compatible with how Git's own remote-tracking refs are organized
-(i.e. refs/remotes/$remote/*). You can enjoy the same benefits today,
-by using the --prefix option.
+NOTE: Before Git v2.0, the default prefix was "" (no prefix). This
+meant that SVN-tracking refs were put at "refs/remotes/*", which is
+incompatible with how Git's own remote-tracking refs are organized.
+If you still want the old default, you can get it by passing
+`--prefix ""` on the command line (`--prefix=""` may not work if
+your Perl's Getopt::Long is < v2.37).
 
 --ignore-paths=<regex>;;
 	When passed to 'init' or 'clone' this regular expression will
@@ -994,16 +995,6 @@ without giving any repository layout options.  If the full history with
 branches and tags is required, the options '--trunk' / '--branches' /
 '--tags' must be used.
 
-When using the options for describing the repository layout (--trunk,
---tags, --branches, --stdlayout), please also specify the --prefix
-option (e.g. '--prefix=origin/') to cause your SVN-tracking refs to be
-placed at refs/remotes/origin/* rather than the default refs/remotes/*.
-The former is more compatible with the layout of Git's "regular"
-remote-tracking refs (refs/remotes/$remote/*), and may potentially
-prevent similarly named SVN branches and Git remotes from clobbering
-each other. In Git v2.0 the default prefix used (i.e. when no --prefix
-is given) will change from "" (no prefix) to "origin/".
-
 When using multiple --branches or --tags, 'git svn' does not automatically
 handle name collisions (for example, if two branches from different paths have
 the same name, or if a branch and a tag have the same name).  In these cases,

Documentation/git-tag.txt

@@ -95,6 +95,12 @@ OPTIONS
 	using fnmatch(3)).  Multiple patterns may be given; if any of
 	them matches, the tag is shown.
 
+--sort=<type>::
+	Sort in a specific order. Supported type is "refname"
+	(lexicographic order), "version:refname" or "v:refname" (tag
+	names are treated as versions). Prepend "-" to reverse sort
+	order.
+
 --column[=<options>]::
 --no-column::
 	Display tag listing in columns. See configuration variable

Documentation/git-update-index.txt

@@ -12,7 +12,7 @@ SYNOPSIS
 'git update-index'
 	     [--add] [--remove | --force-remove] [--replace]
 	     [--refresh] [-q] [--unmerged] [--ignore-missing]
-	     [(--cacheinfo <mode> <object> <file>)...]
+	     [(--cacheinfo <mode>,<object>,<file>)...]
 	     [--chmod=(+|-)x]
 	     [--[no-]assume-unchanged]
 	     [--[no-]skip-worktree]
@@ -68,8 +68,12 @@ OPTIONS
 --ignore-missing::
 	Ignores missing files during a --refresh
 
+--cacheinfo <mode>,<object>,<path>::
 --cacheinfo <mode> <object> <path>::
-	Directly insert the specified info into the index.
+	Directly insert the specified info into the index.  For
+	backward compatibility, you can also give these three
+	arguments as three separate parameters, but new users are
+	encouraged to use a single-parameter form.
 
 --index-info::
         Read index information from stdin.

Documentation/git-upload-archive.txt

@@ -20,6 +20,38 @@ This command is usually not invoked directly by the end user.  The UI
 for the protocol is on the 'git archive' side, and the program pair
 is meant to be used to get an archive from a remote repository.
 
+SECURITY
+--------
+
+In order to protect the privacy of objects that have been removed from
+history but may not yet have been pruned, `git-upload-archive` avoids
+serving archives for commits and trees that are not reachable from the
+repository's refs.  However, because calculating object reachability is
+computationally expensive, `git-upload-archive` implements a stricter
+but easier-to-check set of rules:
+
+  1. Clients may request a commit or tree that is pointed to directly by
+     a ref. E.g., `git archive --remote=origin v1.0`.
+
+  2. Clients may request a sub-tree within a commit or tree using the
+     `ref:path` syntax. E.g., `git archive --remote=origin v1.0:Documentation`.
+
+  3. Clients may _not_ use other sha1 expressions, even if the end
+     result is reachable. E.g., neither a relative commit like `master^`
+     nor a literal sha1 like `abcd1234` is allowed, even if the result
+     is reachable from the refs.
+
+Note that rule 3 disallows many cases that do not have any privacy
+implications. These rules are subject to change in future versions of
+git, and the server accessed by `git archive --remote` may or may not
+follow these exact rules.
+
+If the config option `uploadArchive.allowUnreachable` is true, these
+rules are ignored, and clients may use arbitrary sha1 expressions.
+This is useful if you do not care about the privacy of unreachable
+objects, or if your object database is already publicly available for
+access via non-smart-http.
+
 OPTIONS
 -------
 <directory>::

Documentation/git.txt

@@ -43,9 +43,16 @@ unreleased) version of Git, that is available from 'master'
 branch of the `git.git` repository.
 Documentation for older releases are available here:
 
-* link:v1.9.3/git.html[documentation for release 1.9.3]
+* link:v2.0.1/git.html[documentation for release 2.0.1]
 
 * release notes for
+  link:RelNotes/2.0.1.txt[2.0.1],
+  link:RelNotes/2.0.0.txt[2.0.0].
+
+* link:v1.9.4/git.html[documentation for release 1.9.4]
+
+* release notes for
+  link:RelNotes/1.9.4.txt[1.9.4],
   link:RelNotes/1.9.3.txt[1.9.3],
   link:RelNotes/1.9.2.txt[1.9.2],
   link:RelNotes/1.9.1.txt[1.9.1],
@@ -723,6 +730,11 @@ Git so take care if using Cogito etc.
 	index file. If not specified, the default of `$GIT_DIR/index`
 	is used.
 
+'GIT_INDEX_VERSION'::
+	This environment variable allows the specification of an index
+	version for new repositories.  It won't affect existing index
+	files.  By default index file version [23] is used.
+
 'GIT_OBJECT_DIRECTORY'::
 	If the object storage directory is specified via this
 	environment variable then the sha1 directories are created

Documentation/gitcore-tutorial.txt

@@ -1443,7 +1443,7 @@ Although Git is a truly distributed system, it is often
 convenient to organize your project with an informal hierarchy
 of developers. Linux kernel development is run this way. There
 is a nice illustration (page 17, "Merges to Mainline") in
-link:http://www.xenotime.net/linux/mentor/linux-mentoring-2006.pdf[Randy Dunlap's presentation].
+http://www.xenotime.net/linux/mentor/linux-mentoring-2006.pdf[Randy Dunlap's presentation].
 
 It should be stressed that this hierarchy is purely *informal*.
 There is nothing fundamental in Git that enforces the "chain of

Documentation/gitcvs-migration.txt

@@ -117,7 +117,7 @@ Importing a CVS archive
 -----------------------
 
 First, install version 2.1 or higher of cvsps from
-link:http://www.cobite.com/cvsps/[http://www.cobite.com/cvsps/] and make
+http://www.cobite.com/cvsps/[http://www.cobite.com/cvsps/] and make
 sure it is in your path.  Then cd to a checked out CVS working directory
 of the project you are interested in and run linkgit:git-cvsimport[1]:
 

Documentation/gitignore.txt

@@ -77,6 +77,9 @@ PATTERN FORMAT
    Put a backslash ("`\`") in front of the first hash for patterns
    that begin with a hash.
 
+ - Trailing spaces are ignored unless they are quoted with backlash
+   ("`\`").
+
  - An optional prefix "`!`" which negates the pattern; any
    matching file excluded by a previous pattern will become
    included again. It is not possible to re-include a file if a parent

Documentation/gitk.txt

@@ -166,8 +166,14 @@ gitk --max-count=100 --all \-- Makefile::
 
 Files
 -----
-Gitk creates the .gitk file in your $HOME directory to store preferences
-such as display options, font, and colors.
+User configuration and preferences are stored at:
+
+* '$XDG_CONFIG_HOME/git/gitk' if it exists, otherwise
+* '$HOME/.gitk' if it exists
+
+If neither of the above exist then '$XDG_CONFIG_HOME/git/gitk' is created and
+used by default. If '$XDG_CONFIG_HOME' is not set it defaults to
+'$HOME/.config' in all cases.
 
 History
 -------

Documentation/gitmodules.txt

@@ -67,7 +67,9 @@ submodule.<name>.fetchRecurseSubmodules::
 submodule.<name>.ignore::
 	Defines under what circumstances "git status" and the diff family show
 	a submodule as modified. When set to "all", it will never be considered
-	modified, "dirty" will ignore all changes to the submodules work tree and
+	modified (but will nonetheless show up in the output of status and
+	commit when it has been staged), "dirty" will ignore all changes
+	to the submodules work tree and
 	takes only differences between the HEAD of the submodule and the commit
 	recorded in the superproject into account. "untracked" will additionally
 	let submodules with modified tracked files in their work tree show up.

Documentation/gitremote-helpers.txt

@@ -437,6 +437,10 @@ set by Git if the remote helper has the 'option' capability.
 'option check-connectivity' \{'true'|'false'\}::
 	Request the helper to check connectivity of a clone.
 
+'option force' \{'true'|'false'\}::
+	Request the helper to perform a force update.  Defaults to
+	'false'.
+
 'option cloning \{'true'|'false'\}::
 	Notify the helper this is a clone request (i.e. the current
 	repository is guaranteed empty).

Documentation/gitrepository-layout.txt

@@ -176,6 +176,10 @@ info/grafts::
 	per line describes a commit and its fake parents by
 	listing their 40-byte hexadecimal object names separated
 	by a space and terminated by a newline.
++
+Note that the grafts mechanism is outdated and can lead to problems
+transferring objects between repositories; see linkgit:git-replace[1]
+for a more flexible and robust system to do the same thing.
 
 info/exclude::
 	This file, by convention among Porcelains, stores the

Documentation/gitweb.txt

@@ -84,7 +84,7 @@ separator (rules for Perl's "`split(" ", $line)`").
 
 * Fields use modified URI encoding, defined in RFC 3986, section 2.1
 (Percent-Encoding), or rather "Query string encoding" (see
-link:http://en.wikipedia.org/wiki/Query_string#URL_encoding[]), the difference
+http://en.wikipedia.org/wiki/Query_string#URL_encoding[]), the difference
 being that SP (" ") can be encoded as "{plus}" (and therefore "{plus}" has to be
 also percent-encoded).
 +

Documentation/glossary-content.txt

@@ -176,6 +176,10 @@ current branch integrates with) obviously do not work, as there is no
 	you can make Git pretend the set of <<def_parent,parents>> a <<def_commit,commit>> has
 	is different from what was recorded when the commit was
 	created. Configured via the `.git/info/grafts` file.
++
+Note that the grafts mechanism is outdated and can lead to problems
+transferring objects between repositories; see linkgit:git-replace[1]
+for a more flexible and robust system to do the same thing.
 
 [[def_hash]]hash::
 	In Git's context, synonym for <<def_object_name,object name>>.

Documentation/howto-index.sh

@@ -11,8 +11,8 @@ EOF
 
 for txt
 do
-	title=`expr "$txt" : '.*/\(.*\)\.txt$'`
-	from=`sed -ne '
+	title=$(expr "$txt" : '.*/\(.*\)\.txt$')
+	from=$(sed -ne '
 	/^$/q
 	/^From:[ 	]/{
 		s///
@@ -21,9 +21,9 @@ do
 		s/^/by /
 		p
 	}
-	' "$txt"`
+	' "$txt")
 
-	abstract=`sed -ne '
+	abstract=$(sed -ne '
 	/^Abstract:[ 	]/{
 		s/^[^ 	]*//
 		x
@@ -39,11 +39,11 @@ do
 		x
 		p
 		q
-	}' "$txt"`
+	}' "$txt")
 
 	if grep 'Content-type: text/asciidoc' >/dev/null $txt
 	then
-		file=`expr "$txt" : '\(.*\)\.txt$'`.html
+		file=$(expr "$txt" : '\(.*\)\.txt$').html
 	else
 		file="$txt"
 	fi

Documentation/install-webdoc.sh

@@ -18,17 +18,17 @@ do
 	else
 		echo >&2 "# install $h $T/$h"
 		rm -f "$T/$h"
-		mkdir -p `dirname "$T/$h"`
+		mkdir -p $(dirname "$T/$h")
 		cp "$h" "$T/$h"
 	fi
 done
-strip_leading=`echo "$T/" | sed -e 's|.|.|g'`
+strip_leading=$(echo "$T/" | sed -e 's|.|.|g')
 for th in \
 	"$T"/*.html "$T"/*.txt \
 	"$T"/howto/*.txt "$T"/howto/*.html \
 	"$T"/technical/*.txt "$T"/technical/*.html
 do
-	h=`expr "$th" : "$strip_leading"'\(.*\)'`
+	h=$(expr "$th" : "$strip_leading"'\(.*\)')
 	case "$h" in
 	RelNotes-*.txt | index.html) continue ;;
 	esac

Documentation/merge-strategies.txt

@@ -20,7 +20,7 @@ recursive::
 	merged tree of the common ancestors and uses that as
 	the reference tree for the 3-way merge.  This has been
 	reported to result in fewer merge conflicts without
-	causing mis-merges by tests done on actual merge commits
+	causing mismerges by tests done on actual merge commits
 	taken from Linux 2.6 kernel development history.
 	Additionally this can detect and handle merges involving
 	renames.  This is the default merge strategy when

Documentation/rev-list-options.txt

@@ -257,6 +257,14 @@ See also linkgit:git-reflog[1].
 	Output excluded boundary commits. Boundary commits are
 	prefixed with `-`.
 
+ifdef::git-rev-list[]
+--use-bitmap-index::
+
+	Try to speed up the traversal using the pack bitmap index (if
+	one is available). Note that when traversing with `--objects`,
+	trees and blobs will not have their associated path printed.
+endif::git-rev-list[]
+
 --
 
 History Simplification
@@ -750,6 +758,13 @@ This enables parent rewriting, see 'History Simplification' below.
 This implies the `--topo-order` option by default, but the
 `--date-order` option may also be specified.
 
+--show-linear-break[=<barrier>]::
+	When --graph is not used, all history branches are flattened
+	which can make it hard to see that the two consecutive commits
+	do not belong to a linear branch. This option puts a barrier
+	in between them in that case. If `<barrier>` is specified, it
+	is the string that will be shown instead of the default one.
+
 ifdef::git-rev-list[]
 --count::
 	Print a number stating how many commits would have been

Documentation/technical/api-hash.txt

@@ -1,52 +0,0 @@
-hash API
-========
-
-The hash API is a collection of simple hash table functions. Users are expected
-to implement their own hashing.
-
-Data Structures
----------------
-
-`struct hash_table`::
-
-	The hash table structure. The `array` member points to the hash table
-	entries. The `size` member counts the total number of valid and invalid
-	entries in the table. The `nr` member keeps track of the number of
-	valid entries.
-
-`struct hash_table_entry`::
-
-	An opaque structure representing an entry in the hash table. The `hash`
-	member is the entry's hash key and the `ptr` member is the entry's
-	value.
-
-Functions
----------
-
-`init_hash`::
-
-	Initialize the hash table.
-
-`free_hash`::
-
-	Release memory associated with the hash table.
-
-`insert_hash`::
-
-	Insert a pointer into the hash table. If an entry with that hash
-	already exists, a pointer to the existing entry's value is returned.
-	Otherwise NULL is returned.  This allows callers to implement
-	chaining, etc.
-
-`lookup_hash`::
-
-	Lookup an entry in the hash table. If an entry with that hash exists
-	the entry's value is returned. Otherwise NULL is returned.
-
-`for_each_hash`::
-
-	Call a function for each entry in the hash table. The function is
-	expected to take the entry's value as its only argument and return an
-	int. If the function returns a negative int the loop is aborted
-	immediately.  Otherwise, the return value is accumulated and the sum
-	returned upon completion of the loop.

Documentation/technical/api-hashmap.txt

@@ -0,0 +1,234 @@
+hashmap API
+===========
+
+The hashmap API is a generic implementation of hash-based key-value mappings.
+
+Data Structures
+---------------
+
+`struct hashmap`::
+
+	The hash table structure.
++
+The `size` member keeps track of the total number of entries. The `cmpfn`
+member is a function used to compare two entries for equality. The `table` and
+`tablesize` members store the hash table and its size, respectively.
+
+`struct hashmap_entry`::
+
+	An opaque structure representing an entry in the hash table, which must
+	be used as first member of user data structures. Ideally it should be
+	followed by an int-sized member to prevent unused memory on 64-bit
+	systems due to alignment.
++
+The `hash` member is the entry's hash code and the `next` member points to the
+next entry in case of collisions (i.e. if multiple entries map to the same
+bucket).
+
+`struct hashmap_iter`::
+
+	An iterator structure, to be used with hashmap_iter_* functions.
+
+Types
+-----
+
+`int (*hashmap_cmp_fn)(const void *entry, const void *entry_or_key, const void *keydata)`::
+
+	User-supplied function to test two hashmap entries for equality. Shall
+	return 0 if the entries are equal.
++
+This function is always called with non-NULL `entry` / `entry_or_key`
+parameters that have the same hash code. When looking up an entry, the `key`
+and `keydata` parameters to hashmap_get and hashmap_remove are always passed
+as second and third argument, respectively. Otherwise, `keydata` is NULL.
+
+Functions
+---------
+
+`unsigned int strhash(const char *buf)`::
+`unsigned int strihash(const char *buf)`::
+`unsigned int memhash(const void *buf, size_t len)`::
+`unsigned int memihash(const void *buf, size_t len)`::
+
+	Ready-to-use hash functions for strings, using the FNV-1 algorithm (see
+	http://www.isthe.com/chongo/tech/comp/fnv).
++
+`strhash` and `strihash` take 0-terminated strings, while `memhash` and
+`memihash` operate on arbitrary-length memory.
++
+`strihash` and `memihash` are case insensitive versions.
+
+`void hashmap_init(struct hashmap *map, hashmap_cmp_fn equals_function, size_t initial_size)`::
+
+	Initializes a hashmap structure.
++
+`map` is the hashmap to initialize.
++
+The `equals_function` can be specified to compare two entries for equality.
+If NULL, entries are considered equal if their hash codes are equal.
++
+If the total number of entries is known in advance, the `initial_size`
+parameter may be used to preallocate a sufficiently large table and thus
+prevent expensive resizing. If 0, the table is dynamically resized.
+
+`void hashmap_free(struct hashmap *map, int free_entries)`::
+
+	Frees a hashmap structure and allocated memory.
++
+`map` is the hashmap to free.
++
+If `free_entries` is true, each hashmap_entry in the map is freed as well
+(using stdlib's free()).
+
+`void hashmap_entry_init(void *entry, unsigned int hash)`::
+
+	Initializes a hashmap_entry structure.
++
+`entry` points to the entry to initialize.
++
+`hash` is the hash code of the entry.
+
+`void *hashmap_get(const struct hashmap *map, const void *key, const void *keydata)`::
+
+	Returns the hashmap entry for the specified key, or NULL if not found.
++
+`map` is the hashmap structure.
++
+`key` is a hashmap_entry structure (or user data structure that starts with
+hashmap_entry) that has at least been initialized with the proper hash code
+(via `hashmap_entry_init`).
++
+If an entry with matching hash code is found, `key` and `keydata` are passed
+to `hashmap_cmp_fn` to decide whether the entry matches the key.
+
+`void *hashmap_get_next(const struct hashmap *map, const void *entry)`::
+
+	Returns the next equal hashmap entry, or NULL if not found. This can be
+	used to iterate over duplicate entries (see `hashmap_add`).
++
+`map` is the hashmap structure.
++
+`entry` is the hashmap_entry to start the search from, obtained via a previous
+call to `hashmap_get` or `hashmap_get_next`.
+
+`void hashmap_add(struct hashmap *map, void *entry)`::
+
+	Adds a hashmap entry. This allows to add duplicate entries (i.e.
+	separate values with the same key according to hashmap_cmp_fn).
++
+`map` is the hashmap structure.
++
+`entry` is the entry to add.
+
+`void *hashmap_put(struct hashmap *map, void *entry)`::
+
+	Adds or replaces a hashmap entry. If the hashmap contains duplicate
+	entries equal to the specified entry, only one of them will be replaced.
++
+`map` is the hashmap structure.
++
+`entry` is the entry to add or replace.
++
+Returns the replaced entry, or NULL if not found (i.e. the entry was added).
+
+`void *hashmap_remove(struct hashmap *map, const void *key, const void *keydata)`::
+
+	Removes a hashmap entry matching the specified key. If the hashmap
+	contains duplicate entries equal to the specified key, only one of
+	them will be removed.
++
+`map` is the hashmap structure.
++
+`key` is a hashmap_entry structure (or user data structure that starts with
+hashmap_entry) that has at least been initialized with the proper hash code
+(via `hashmap_entry_init`).
++
+If an entry with matching hash code is found, `key` and `keydata` are
+passed to `hashmap_cmp_fn` to decide whether the entry matches the key.
++
+Returns the removed entry, or NULL if not found.
+
+`void hashmap_iter_init(struct hashmap *map, struct hashmap_iter *iter)`::
+`void *hashmap_iter_next(struct hashmap_iter *iter)`::
+`void *hashmap_iter_first(struct hashmap *map, struct hashmap_iter *iter)`::
+
+	Used to iterate over all entries of a hashmap.
++
+`hashmap_iter_init` initializes a `hashmap_iter` structure.
++
+`hashmap_iter_next` returns the next hashmap_entry, or NULL if there are no
+more entries.
++
+`hashmap_iter_first` is a combination of both (i.e. initializes the iterator
+and returns the first entry, if any).
+
+Usage example
+-------------
+
+Here's a simple usage example that maps long keys to double values.
+------------
+struct hashmap map;
+
+struct long2double {
+	struct hashmap_entry ent; /* must be the first member! */
+	long key;
+	double value;
+};
+
+static int long2double_cmp(const struct long2double *e1, const struct long2double *e2, const void *unused)
+{
+	return !(e1->key == e2->key);
+}
+
+void long2double_init(void)
+{
+	hashmap_init(&map, (hashmap_cmp_fn) long2double_cmp, 0);
+}
+
+void long2double_free(void)
+{
+	hashmap_free(&map, 1);
+}
+
+static struct long2double *find_entry(long key)
+{
+	struct long2double k;
+	hashmap_entry_init(&k, memhash(&key, sizeof(long)));
+	k.key = key;
+	return hashmap_get(&map, &k, NULL);
+}
+
+double get_value(long key)
+{
+	struct long2double *e = find_entry(key);
+	return e ? e->value : 0;
+}
+
+void set_value(long key, double value)
+{
+	struct long2double *e = find_entry(key);
+	if (!e) {
+		e = malloc(sizeof(struct long2double));
+		hashmap_entry_init(e, memhash(&key, sizeof(long)));
+		e->key = key;
+		hashmap_add(&map, e);
+	}
+	e->value = value;
+}
+------------
+
+Using variable-sized keys
+-------------------------
+
+The `hashmap_entry_get` and `hashmap_entry_remove` functions expect an ordinary
+`hashmap_entry` structure as key to find the correct entry. If the key data is
+variable-sized (e.g. a FLEX_ARRAY string) or quite large, it is undesirable
+to create a full-fledged entry structure on the heap and copy all the key data
+into the structure.
+
+In this case, the `keydata` parameter can be used to pass
+variable-sized key data directly to the comparison function, and the `key`
+parameter can be a stripped-down, fixed size entry structure allocated on the
+stack.
+
+See test-hashmap.c for an example using arbitrary-length strings as keys.

Documentation/technical/api-parse-options.txt

@@ -160,10 +160,6 @@ There are some macros to easily define options:
 	`int_var` is set to `integer` with `--option`, and
 	reset to zero with `--no-option`.
 
-`OPT_SET_PTR(short, long, &ptr_var, description, ptr)`::
-	Introduce a boolean option.
-	If used, set `ptr_var` to `ptr`.
-
 `OPT_STRING(short, long, &str_var, arg_str, description)`::
 	Introduce an option with string argument.
 	The string argument is put into `str_var`.

Documentation/technical/bitmap-format.txt

@@ -0,0 +1,164 @@
+GIT bitmap v1 format
+====================
+
+	- A header appears at the beginning:
+
+		4-byte signature: {'B', 'I', 'T', 'M'}
+
+		2-byte version number (network byte order)
+			The current implementation only supports version 1
+			of the bitmap index (the same one as JGit).
+
+		2-byte flags (network byte order)
+
+			The following flags are supported:
+
+			- BITMAP_OPT_FULL_DAG (0x1) REQUIRED
+			This flag must always be present. It implies that the bitmap
+			index has been generated for a packfile with full closure
+			(i.e. where every single object in the packfile can find
+			 its parent links inside the same packfile). This is a
+			requirement for the bitmap index format, also present in JGit,
+			that greatly reduces the complexity of the implementation.
+
+			- BITMAP_OPT_HASH_CACHE (0x4)
+			If present, the end of the bitmap file contains
+			`N` 32-bit name-hash values, one per object in the
+			pack. The format and meaning of the name-hash is
+			described below.
+
+		4-byte entry count (network byte order)
+
+			The total count of entries (bitmapped commits) in this bitmap index.
+
+		20-byte checksum
+
+			The SHA1 checksum of the pack this bitmap index belongs to.
+
+	- 4 EWAH bitmaps that act as type indexes
+
+		Type indexes are serialized after the hash cache in the shape
+		of four EWAH bitmaps stored consecutively (see Appendix A for
+		the serialization format of an EWAH bitmap).
+
+		There is a bitmap for each Git object type, stored in the following
+		order:
+
+			- Commits
+			- Trees
+			- Blobs
+			- Tags
+
+		In each bitmap, the `n`th bit is set to true if the `n`th object
+		in the packfile is of that type.
+
+		The obvious consequence is that the OR of all 4 bitmaps will result
+		in a full set (all bits set), and the AND of all 4 bitmaps will
+		result in an empty bitmap (no bits set).
+
+	- N entries with compressed bitmaps, one for each indexed commit
+
+		Where `N` is the total amount of entries in this bitmap index.
+		Each entry contains the following:
+
+		- 4-byte object position (network byte order)
+			The position **in the index for the packfile** where the
+			bitmap for this commit is found.
+
+		- 1-byte XOR-offset
+			The xor offset used to compress this bitmap. For an entry
+			in position `x`, a XOR offset of `y` means that the actual
+			bitmap representing this commit is composed by XORing the
+			bitmap for this entry with the bitmap in entry `x-y` (i.e.
+			the bitmap `y` entries before this one).
+
+			Note that this compression can be recursive. In order to
+			XOR this entry with a previous one, the previous entry needs
+			to be decompressed first, and so on.
+
+			The hard-limit for this offset is 160 (an entry can only be
+			xor'ed against one of the 160 entries preceding it). This
+			number is always positive, and hence entries are always xor'ed
+			with **previous** bitmaps, not bitmaps that will come afterwards
+			in the index.
+
+		- 1-byte flags for this bitmap
+			At the moment the only available flag is `0x1`, which hints
+			that this bitmap can be re-used when rebuilding bitmap indexes
+			for the repository.
+
+		- The compressed bitmap itself, see Appendix A.
+
+== Appendix A: Serialization format for an EWAH bitmap
+
+Ewah bitmaps are serialized in the same protocol as the JAVAEWAH
+library, making them backwards compatible with the JGit
+implementation:
+
+	- 4-byte number of bits of the resulting UNCOMPRESSED bitmap
+
+	- 4-byte number of words of the COMPRESSED bitmap, when stored
+
+	- N x 8-byte words, as specified by the previous field
+
+		This is the actual content of the compressed bitmap.
+
+	- 4-byte position of the current RLW for the compressed
+		bitmap
+
+All words are stored in network byte order for their corresponding
+sizes.
+
+The compressed bitmap is stored in a form of run-length encoding, as
+follows.  It consists of a concatenation of an arbitrary number of
+chunks.  Each chunk consists of one or more 64-bit words
+
+     H  L_1  L_2  L_3 .... L_M
+
+H is called RLW (run length word).  It consists of (from lower to higher
+order bits):
+
+     - 1 bit: the repeated bit B
+
+     - 32 bits: repetition count K (unsigned)
+
+     - 31 bits: literal word count M (unsigned)
+
+The bitstream represented by the above chunk is then:
+
+     - K repetitions of B
+
+     - The bits stored in `L_1` through `L_M`.  Within a word, bits at
+       lower order come earlier in the stream than those at higher
+       order.
+
+The next word after `L_M` (if any) must again be a RLW, for the next
+chunk.  For efficient appending to the bitstream, the EWAH stores a
+pointer to the last RLW in the stream.
+
+
+== Appendix B: Optional Bitmap Sections
+
+These sections may or may not be present in the `.bitmap` file; their
+presence is indicated by the header flags section described above.
+
+Name-hash cache
+---------------
+
+If the BITMAP_OPT_HASH_CACHE flag is set, the end of the bitmap contains
+a cache of 32-bit values, one per object in the pack. The value at
+position `i` is the hash of the pathname at which the `i`th object
+(counting in index order) in the pack can be found.  This can be fed
+into the delta heuristics to compare objects with similar pathnames.
+
+The hash algorithm used is:
+
+    hash = 0;
+    while ((c = *name++))
+	    if (!isspace(c))
+		    hash = (hash >> 2) + (c << 24);
+
+Note that this hashing scheme is tied to the BITMAP_OPT_HASH_CACHE flag.
+If implementations want to choose a different hashing scheme, they are
+free to do so, but MUST allocate a new header flag (because comparing
+hashes made under two different schemes would be pointless).

Documentation/technical/http-protocol.txt

@@ -500,7 +500,7 @@ TODO: Document this further.
 References
 ----------
 
-link:http://www.ietf.org/rfc/rfc1738.txt[RFC 1738: Uniform Resource Locators (URL)]
-link:http://www.ietf.org/rfc/rfc2616.txt[RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1]
+http://www.ietf.org/rfc/rfc1738.txt[RFC 1738: Uniform Resource Locators (URL)]
+http://www.ietf.org/rfc/rfc2616.txt[RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1]
 link:technical/pack-protocol.html
 link:technical/protocol-capabilities.html

GIT-VERSION-GEN

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 GVF=GIT-VERSION-FILE
-DEF_VER=v1.9.3
+DEF_VER=v2.0.1
 
 LF='
 '

Makefile

@@ -59,9 +59,9 @@ all::
 # FreeBSD can use either, but MinGW and some others need to use
 # libcharset.h's locale_charset() instead.
 #
-# Define CHARSET_LIB to you need to link with library other than -liconv to
+# Define CHARSET_LIB to the library you need to link with in order to
 # use locale_charset() function.  On some platforms this needs to set to
-# -lcharset
+# -lcharset, on others to -liconv .
 #
 # Define LIBC_CONTAINS_LIBINTL if your gettext implementation doesn't
 # need -lintl when linking.
@@ -101,14 +101,6 @@ all::
 #
 # Define NO_MKSTEMPS if you don't have mkstemps in the C library.
 #
-# Define NO_FNMATCH if you don't have fnmatch in the C library.
-#
-# Define NO_FNMATCH_CASEFOLD if your fnmatch function doesn't have the
-# FNM_CASEFOLD GNU extension.
-#
-# Define NO_WILDMATCH if you do not want to use Git's wildmatch
-# implementation as fnmatch
-#
 # Define NO_GECOS_IN_PWENT if you don't have pw_gecos in struct passwd
 # in the C library.
 #
@@ -191,9 +183,6 @@ all::
 # Define NO_STRUCT_ITIMERVAL if you don't have struct itimerval
 # This also implies NO_SETITIMER
 #
-# Define NO_THREAD_SAFE_PREAD if your pread() implementation is not
-# thread-safe. (e.g. compat/pread.c or cygwin)
-#
 # Define NO_FAST_WORKING_DIRECTORY if accessing objects in pack files is
 # generally faster on your platform than accessing the working directory.
 #
@@ -343,6 +332,10 @@ all::
 # (defaults to "man") if you want to have a different default when
 # "git help" is called without a parameter specifying the format.
 #
+# Define TEST_GIT_INDEX_VERSION to 2, 3 or 4 to run the test suite
+# with a different indexfile format version.  If it isn't set the index
+# file format used is index-v[23].
+#
 # Define GMTIME_UNRELIABLE_ERRORS if your gmtime() function does not
 # return NULL when it receives a bogus time_t.
 
@@ -558,6 +551,7 @@ TEST_PROGRAMS_NEED_X += test-date
 TEST_PROGRAMS_NEED_X += test-delta
 TEST_PROGRAMS_NEED_X += test-dump-cache-tree
 TEST_PROGRAMS_NEED_X += test-genrandom
+TEST_PROGRAMS_NEED_X += test-hashmap
 TEST_PROGRAMS_NEED_X += test-index-version
 TEST_PROGRAMS_NEED_X += test-line-buffer
 TEST_PROGRAMS_NEED_X += test-match-trees
@@ -666,6 +660,8 @@ LIB_H += diff.h
 LIB_H += diffcore.h
 LIB_H += dir.h
 LIB_H += exec_cmd.h
+LIB_H += ewah/ewok.h
+LIB_H += ewah/ewok_rlw.h
 LIB_H += fetch-pack.h
 LIB_H += fmt-merge-msg.h
 LIB_H += fsck.h
@@ -674,7 +670,7 @@ LIB_H += git-compat-util.h
 LIB_H += gpg-interface.h
 LIB_H += graph.h
 LIB_H += grep.h
-LIB_H += hash.h
+LIB_H += hashmap.h
 LIB_H += help.h
 LIB_H += http.h
 LIB_H += kwset.h
@@ -693,8 +689,10 @@ LIB_H += notes-merge.h
 LIB_H += notes-utils.h
 LIB_H += notes.h
 LIB_H += object.h
+LIB_H += pack-objects.h
 LIB_H += pack-revindex.h
 LIB_H += pack.h
+LIB_H += pack-bitmap.h
 LIB_H += parse-options.h
 LIB_H += patch-ids.h
 LIB_H += pathspec.h
@@ -798,6 +796,10 @@ LIB_OBJS += dir.o
 LIB_OBJS += editor.o
 LIB_OBJS += entry.o
 LIB_OBJS += environment.o
+LIB_OBJS += ewah/bitmap.o
+LIB_OBJS += ewah/ewah_bitmap.o
+LIB_OBJS += ewah/ewah_io.o
+LIB_OBJS += ewah/ewah_rlw.o
 LIB_OBJS += exec_cmd.o
 LIB_OBJS += fetch-pack.o
 LIB_OBJS += fsck.o
@@ -805,7 +807,7 @@ LIB_OBJS += gettext.o
 LIB_OBJS += gpg-interface.o
 LIB_OBJS += graph.o
 LIB_OBJS += grep.o
-LIB_OBJS += hash.o
+LIB_OBJS += hashmap.o
 LIB_OBJS += help.o
 LIB_OBJS += hex.o
 LIB_OBJS += ident.o
@@ -829,7 +831,10 @@ LIB_OBJS += notes-cache.o
 LIB_OBJS += notes-merge.o
 LIB_OBJS += notes-utils.o
 LIB_OBJS += object.o
+LIB_OBJS += pack-bitmap.o
+LIB_OBJS += pack-bitmap-write.o
 LIB_OBJS += pack-check.o
+LIB_OBJS += pack-objects.o
 LIB_OBJS += pack-revindex.o
 LIB_OBJS += pack-write.o
 LIB_OBJS += pager.o
@@ -887,6 +892,7 @@ LIB_OBJS += userdiff.o
 LIB_OBJS += utf8.o
 LIB_OBJS += varint.o
 LIB_OBJS += version.o
+LIB_OBJS += versioncmp.o
 LIB_OBJS += walker.o
 LIB_OBJS += wildmatch.o
 LIB_OBJS += wrapper.o
@@ -1274,20 +1280,6 @@ endif
 ifdef NO_STRTOULL
 	COMPAT_CFLAGS += -DNO_STRTOULL
 endif
-ifdef NO_FNMATCH
-	COMPAT_CFLAGS += -Icompat/fnmatch
-	COMPAT_CFLAGS += -DNO_FNMATCH
-	COMPAT_OBJS += compat/fnmatch/fnmatch.o
-else
-ifdef NO_FNMATCH_CASEFOLD
-	COMPAT_CFLAGS += -Icompat/fnmatch
-	COMPAT_CFLAGS += -DNO_FNMATCH_CASEFOLD
-	COMPAT_OBJS += compat/fnmatch/fnmatch.o
-endif
-endif
-ifndef NO_WILDMATCH
-	COMPAT_CFLAGS += -DUSE_WILDMATCH
-endif
 ifdef NO_SETENV
 	COMPAT_CFLAGS += -DNO_SETENV
 	COMPAT_OBJS += compat/setenv.o
@@ -1344,10 +1336,6 @@ endif
 ifdef NO_PREAD
 	COMPAT_CFLAGS += -DNO_PREAD
 	COMPAT_OBJS += compat/pread.o
-	NO_THREAD_SAFE_PREAD = YesPlease
-endif
-ifdef NO_THREAD_SAFE_PREAD
-	BASIC_CFLAGS += -DNO_THREAD_SAFE_PREAD
 endif
 ifdef NO_FAST_WORKING_DIRECTORY
 	BASIC_CFLAGS += -DNO_FAST_WORKING_DIRECTORY
@@ -2107,7 +2095,7 @@ pdf:
 
 XGETTEXT_FLAGS = \
 	--force-po \
-	--add-comments \
+	--add-comments=TRANSLATORS: \
 	--msgid-bugs-address="Git Mailing List <git@vger.kernel.org>" \
 	--from-code=UTF-8
 XGETTEXT_FLAGS_C = $(XGETTEXT_FLAGS) --language=C \
@@ -2230,6 +2218,9 @@ endif
 ifdef GIT_PERF_MAKE_OPTS
 	@echo GIT_PERF_MAKE_OPTS=\''$(subst ','\'',$(subst ','\'',$(GIT_PERF_MAKE_OPTS)))'\' >>$@
 endif
+ifdef TEST_GIT_INDEX_VERSION
+	@echo TEST_GIT_INDEX_VERSION=\''$(subst ','\'',$(subst ','\'',$(TEST_GIT_INDEX_VERSION)))'\' >>$@
+endif
 
 ### Detect Python interpreter path changes
 ifndef NO_PYTHON
@@ -2487,8 +2478,9 @@ profile-clean:
 	$(RM) $(addsuffix *.gcno,$(addprefix $(PROFILE_DIR)/, $(object_dirs)))
 
 clean: profile-clean coverage-clean
-	$(RM) *.o *.res block-sha1/*.o ppc/*.o compat/*.o compat/*/*.o xdiff/*.o vcs-svn/*.o \
-		builtin/*.o $(LIB_FILE) $(XDIFF_LIB) $(VCSSVN_LIB)
+	$(RM) *.o *.res block-sha1/*.o ppc/*.o compat/*.o compat/*/*.o
+	$(RM) xdiff/*.o vcs-svn/*.o ewah/*.o builtin/*.o
+	$(RM) $(LIB_FILE) $(XDIFF_LIB) $(VCSSVN_LIB)
 	$(RM) $(ALL_PROGRAMS) $(SCRIPT_LIB) $(BUILT_INS) git$X
 	$(RM) $(TEST_PROGRAMS) $(NO_INSTALL)
 	$(RM) -r bin-wrappers $(dep_dirs)

RelNotes

@@ -1 +1 @@
-Documentation/RelNotes/1.9.3.txt
+Documentation/RelNotes/2.0.1.txt

advice.c

@@ -2,7 +2,6 @@
 
 int advice_push_update_rejected = 1;
 int advice_push_non_ff_current = 1;
-int advice_push_non_ff_default = 1;
 int advice_push_non_ff_matching = 1;
 int advice_push_already_exists = 1;
 int advice_push_fetch_first = 1;
@@ -23,7 +22,6 @@ static struct {
 } advice_config[] = {
 	{ "pushupdaterejected", &advice_push_update_rejected },
 	{ "pushnonffcurrent", &advice_push_non_ff_current },
-	{ "pushnonffdefault", &advice_push_non_ff_default },
 	{ "pushnonffmatching", &advice_push_non_ff_matching },
 	{ "pushalreadyexists", &advice_push_already_exists },
 	{ "pushfetchfirst", &advice_push_fetch_first },

advice.h

@@ -5,7 +5,6 @@
 
 extern int advice_push_update_rejected;
 extern int advice_push_non_ff_current;
-extern int advice_push_non_ff_default;
 extern int advice_push_non_ff_matching;
 extern int advice_push_already_exists;
 extern int advice_push_fetch_first;

archive.c

@@ -17,6 +17,7 @@ static char const * const archive_usage[] = {
 static const struct archiver **archivers;
 static int nr_archivers;
 static int alloc_archivers;
+static int remote_allow_unreachable;
 
 void register_archiver(struct archiver *ar)
 {
@@ -257,10 +258,10 @@ static void parse_treeish_arg(const char **argv,
 	unsigned char sha1[20];
 
 	/* Remotes are only allowed to fetch actual refs */
-	if (remote) {
+	if (remote && !remote_allow_unreachable) {
 		char *ref = NULL;
-		const char *colon = strchr(name, ':');
-		int refnamelen = colon ? colon - name : strlen(name);
+		const char *colon = strchrnul(name, ':');
+		int refnamelen = colon - name;
 
 		if (!dwim_ref(name, refnamelen, sha1, &ref))
 			die("no such ref: %.*s", refnamelen, name);
@@ -401,6 +402,14 @@ static int parse_archive_args(int argc, const char **argv,
 	return argc;
 }
 
+static int git_default_archive_config(const char *var, const char *value,
+				      void *cb)
+{
+	if (!strcmp(var, "uploadarchive.allowunreachable"))
+		remote_allow_unreachable = git_config_bool(var, value);
+	return git_default_config(var, value, cb);
+}
+
 int write_archive(int argc, const char **argv, const char *prefix,
 		  int setup_prefix, const char *name_hint, int remote)
 {
@@ -411,7 +420,7 @@ int write_archive(int argc, const char **argv, const char *prefix,
 	if (setup_prefix && prefix == NULL)
 		prefix = setup_git_directory_gently(&nongit);
 
-	git_config(git_default_config, NULL);
+	git_config(git_default_archive_config, NULL);
 	init_tar_archiver();
 	init_zip_archiver();
 

attr.c

@@ -338,12 +338,7 @@ static void handle_attr_line(struct attr_stack *res,
 	a = parse_attr_line(line, src, lineno, macro_ok);
 	if (!a)
 		return;
-	if (res->alloc <= res->num_matches) {
-		res->alloc = alloc_nr(res->num_matches);
-		res->attrs = xrealloc(res->attrs,
-				      sizeof(struct match_attr *) *
-				      res->alloc);
-	}
+	ALLOC_GROW(res->attrs, res->num_matches + 1, res->alloc);
 	res->attrs[res->num_matches++] = a;
 }
 

bisect.c

@@ -21,8 +21,7 @@ static const char *argv_checkout[] = {"checkout", "-q", NULL, "--", NULL};
 static const char *argv_show_branch[] = {"show-branch", NULL, NULL};
 static const char *argv_update_ref[] = {"update-ref", "--no-deref", "BISECT_HEAD", NULL, NULL};
 
-/* bits #0-15 in revision.h */
-
+/* Remember to update object flag allocation in object.h */
 #define COUNTED		(1u<<16)
 
 /*
@@ -685,7 +684,6 @@ static void mark_expected_rev(char *bisect_rev_hex)
 
 static int bisect_checkout(char *bisect_rev_hex, int no_checkout)
 {
-	int res;
 
 	mark_expected_rev(bisect_rev_hex);
 
@@ -696,6 +694,7 @@ static int bisect_checkout(char *bisect_rev_hex, int no_checkout)
 			die("update-ref --no-deref HEAD failed on %s",
 			    bisect_rev_hex);
 	} else {
+		int res;
 		res = run_command_v_opt(argv_checkout, RUN_GIT_CMD);
 		if (res)
 			exit(res);

block-sha1/sha1.c

@@ -62,38 +62,6 @@
   #define setW(x, val) (W(x) = (val))
 #endif
 
-/*
- * Performance might be improved if the CPU architecture is OK with
- * unaligned 32-bit loads and a fast ntohl() is available.
- * Otherwise fall back to byte loads and shifts which is portable,
- * and is faster on architectures with memory alignment issues.
- */
-
-#if defined(__i386__) || defined(__x86_64__) || \
-    defined(_M_IX86) || defined(_M_X64) || \
-    defined(__ppc__) || defined(__ppc64__) || \
-    defined(__powerpc__) || defined(__powerpc64__) || \
-    defined(__s390__) || defined(__s390x__)
-
-#define get_be32(p)	ntohl(*(unsigned int *)(p))
-#define put_be32(p, v)	do { *(unsigned int *)(p) = htonl(v); } while (0)
-
-#else
-
-#define get_be32(p)	( \
-	(*((unsigned char *)(p) + 0) << 24) | \
-	(*((unsigned char *)(p) + 1) << 16) | \
-	(*((unsigned char *)(p) + 2) <<  8) | \
-	(*((unsigned char *)(p) + 3) <<  0) )
-#define put_be32(p, v)	do { \
-	unsigned int __v = (v); \
-	*((unsigned char *)(p) + 0) = __v >> 24; \
-	*((unsigned char *)(p) + 1) = __v >> 16; \
-	*((unsigned char *)(p) + 2) = __v >>  8; \
-	*((unsigned char *)(p) + 3) = __v >>  0; } while (0)
-
-#endif
-
 /* This "rolls" over the 512-bit array */
 #define W(x) (array[(x)&15])
 

branch.c

@@ -1,3 +1,4 @@
+#include "git-compat-util.h"
 #include "cache.h"
 #include "branch.h"
 #include "refs.h"
@@ -49,12 +50,11 @@ static int should_setup_rebase(const char *origin)
 
 void install_branch_config(int flag, const char *local, const char *origin, const char *remote)
 {
-	const char *shortname = remote + 11;
-	int remote_is_branch = starts_with(remote, "refs/heads/");
+	const char *shortname = skip_prefix(remote, "refs/heads/");
 	struct strbuf key = STRBUF_INIT;
 	int rebasing = should_setup_rebase(origin);
 
-	if (remote_is_branch
+	if (shortname
 	    && !strcmp(local, shortname)
 	    && !origin) {
 		warning(_("Not setting branch %s as its own upstream."),
@@ -77,29 +77,29 @@ void install_branch_config(int flag, const char *local, const char *origin, cons
 	strbuf_release(&key);
 
 	if (flag & BRANCH_CONFIG_VERBOSE) {
-		if (remote_is_branch && origin)
-			printf_ln(rebasing ?
-				  _("Branch %s set up to track remote branch %s from %s by rebasing.") :
-				  _("Branch %s set up to track remote branch %s from %s."),
-				  local, shortname, origin);
-		else if (remote_is_branch && !origin)
-			printf_ln(rebasing ?
-				  _("Branch %s set up to track local branch %s by rebasing.") :
-				  _("Branch %s set up to track local branch %s."),
-				  local, shortname);
-		else if (!remote_is_branch && origin)
-			printf_ln(rebasing ?
-				  _("Branch %s set up to track remote ref %s by rebasing.") :
-				  _("Branch %s set up to track remote ref %s."),
-				  local, remote);
-		else if (!remote_is_branch && !origin)
-			printf_ln(rebasing ?
-				  _("Branch %s set up to track local ref %s by rebasing.") :
-				  _("Branch %s set up to track local ref %s."),
-				  local, remote);
-		else
-			die("BUG: impossible combination of %d and %p",
-			    remote_is_branch, origin);
+		if (shortname) {
+			if (origin)
+				printf_ln(rebasing ?
+					  _("Branch %s set up to track remote branch %s from %s by rebasing.") :
+					  _("Branch %s set up to track remote branch %s from %s."),
+					  local, shortname, origin);
+			else
+				printf_ln(rebasing ?
+					  _("Branch %s set up to track local branch %s by rebasing.") :
+					  _("Branch %s set up to track local branch %s."),
+					  local, shortname);
+		} else {
+			if (origin)
+				printf_ln(rebasing ?
+					  _("Branch %s set up to track remote ref %s by rebasing.") :
+					  _("Branch %s set up to track remote ref %s."),
+					  local, remote);
+			else
+				printf_ln(rebasing ?
+					  _("Branch %s set up to track local ref %s by rebasing.") :
+					  _("Branch %s set up to track local ref %s."),
+					  local, remote);
+		}
 	}
 }
 
@@ -114,10 +114,6 @@ static int setup_tracking(const char *new_ref, const char *orig_ref,
 	struct tracking tracking;
 	int config_flags = quiet ? 0 : BRANCH_CONFIG_VERBOSE;
 
-	if (strlen(new_ref) > 1024 - 7 - 7 - 1)
-		return error(_("Tracking not set up: name too long: %s"),
-				new_ref);
-
 	memset(&tracking, 0, sizeof(tracking));
 	tracking.spec.dst = (char *)orig_ref;
 	if (for_each_remote(find_tracked_branch, &tracking))

builtin/add.c

@@ -15,6 +15,7 @@
 #include "diffcore.h"
 #include "revision.h"
 #include "bulk-checkin.h"
+#include "argv-array.h"
 
 static const char * const builtin_add_usage[] = {
 	N_("git add [options] [--] <pathspec>..."),
@@ -26,55 +27,8 @@ static int take_worktree_changes;
 struct update_callback_data {
 	int flags;
 	int add_errors;
-	const char *implicit_dot;
-	size_t implicit_dot_len;
-
-	/* only needed for 2.0 transition preparation */
-	int warn_add_would_remove;
 };
 
-static const char *option_with_implicit_dot;
-static const char *short_option_with_implicit_dot;
-
-static void warn_pathless_add(void)
-{
-	static int shown;
-	assert(option_with_implicit_dot && short_option_with_implicit_dot);
-
-	if (shown)
-		return;
-	shown = 1;
-
-	/*
-	 * To be consistent with "git add -p" and most Git
-	 * commands, we should default to being tree-wide, but
-	 * this is not the original behavior and can't be
-	 * changed until users trained themselves not to type
-	 * "git add -u" or "git add -A". For now, we warn and
-	 * keep the old behavior. Later, the behavior can be changed
-	 * to tree-wide, keeping the warning for a while, and
-	 * eventually we can drop the warning.
-	 */
-	warning(_("The behavior of 'git add %s (or %s)' with no path argument from a\n"
-		  "subdirectory of the tree will change in Git 2.0 and should not be used anymore.\n"
-		  "To add content for the whole tree, run:\n"
-		  "\n"
-		  "  git add %s :/\n"
-		  "  (or git add %s :/)\n"
-		  "\n"
-		  "To restrict the command to the current directory, run:\n"
-		  "\n"
-		  "  git add %s .\n"
-		  "  (or git add %s .)\n"
-		  "\n"
-		  "With the current Git version, the command is restricted to "
-		  "the current directory.\n"
-		  ""),
-		option_with_implicit_dot, short_option_with_implicit_dot,
-		option_with_implicit_dot, short_option_with_implicit_dot,
-		option_with_implicit_dot, short_option_with_implicit_dot);
-}
-
 static int fix_unmerged_status(struct diff_filepair *p,
 			       struct update_callback_data *data)
 {
@@ -96,49 +50,15 @@ static int fix_unmerged_status(struct diff_filepair *p,
 		return DIFF_STATUS_MODIFIED;
 }
 
-static const char *add_would_remove_warning = N_(
-	"You ran 'git add' with neither '-A (--all)' or '--ignore-removal',\n"
-"whose behaviour will change in Git 2.0 with respect to paths you removed.\n"
-"Paths like '%s' that are\n"
-"removed from your working tree are ignored with this version of Git.\n"
-"\n"
-"* 'git add --ignore-removal <pathspec>', which is the current default,\n"
-"  ignores paths you removed from your working tree.\n"
-"\n"
-"* 'git add --all <pathspec>' will let you also record the removals.\n"
-"\n"
-"Run 'git status' to check the paths you removed from your working tree.\n");
-
-static void warn_add_would_remove(const char *path)
-{
-	warning(_(add_would_remove_warning), path);
-}
-
 static void update_callback(struct diff_queue_struct *q,
 			    struct diff_options *opt, void *cbdata)
 {
 	int i;
 	struct update_callback_data *data = cbdata;
-	const char *implicit_dot = data->implicit_dot;
-	size_t implicit_dot_len = data->implicit_dot_len;
 
 	for (i = 0; i < q->nr; i++) {
 		struct diff_filepair *p = q->queue[i];
 		const char *path = p->one->path;
-		/*
-		 * Check if "git add -A" or "git add -u" was run from a
-		 * subdirectory with a modified file outside that directory,
-		 * and warn if so.
-		 *
-		 * "git add -u" will behave like "git add -u :/" instead of
-		 * "git add -u ." in the future.  This warning prepares for
-		 * that change.
-		 */
-		if (implicit_dot &&
-		    strncmp_icase(path, implicit_dot, implicit_dot_len)) {
-			warn_pathless_add();
-			continue;
-		}
 		switch (fix_unmerged_status(p, data)) {
 		default:
 			die(_("unexpected diff status %c"), p->status);
@@ -151,10 +71,6 @@ static void update_callback(struct diff_queue_struct *q,
 			}
 			break;
 		case DIFF_STATUS_DELETED:
-			if (data->warn_add_would_remove) {
-				warn_add_would_remove(path);
-				data->warn_add_would_remove = 0;
-			}
 			if (data->flags & ADD_CACHE_IGNORE_REMOVAL)
 				break;
 			if (!(data->flags & ADD_CACHE_PRETEND))
@@ -166,37 +82,28 @@ static void update_callback(struct diff_queue_struct *q,
 	}
 }
 
-static void update_files_in_cache(const char *prefix,
-				  const struct pathspec *pathspec,
-				  struct update_callback_data *data)
+int add_files_to_cache(const char *prefix,
+		       const struct pathspec *pathspec, int flags)
 {
+	struct update_callback_data data;
 	struct rev_info rev;
 
+	memset(&data, 0, sizeof(data));
+	data.flags = flags;
+
 	init_revisions(&rev, prefix);
 	setup_revisions(0, NULL, &rev, NULL);
 	if (pathspec)
 		copy_pathspec(&rev.prune_data, pathspec);
 	rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 	rev.diffopt.format_callback = update_callback;
-	rev.diffopt.format_callback_data = data;
+	rev.diffopt.format_callback_data = &data;
 	rev.max_count = 0; /* do not compare unmerged paths with stage #2 */
 	run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
-}
-
-int add_files_to_cache(const char *prefix,
-		       const struct pathspec *pathspec, int flags)
-{
-	struct update_callback_data data;
-
-	memset(&data, 0, sizeof(data));
-	data.flags = flags;
-	update_files_in_cache(prefix, pathspec, &data);
 	return !!data.add_errors;
 }
 
-#define WARN_IMPLICIT_DOT (1u << 0)
-static char *prune_directory(struct dir_struct *dir, struct pathspec *pathspec,
-			     int prefix, unsigned flag)
+static char *prune_directory(struct dir_struct *dir, struct pathspec *pathspec, int prefix)
 {
 	char *seen;
 	int i;
@@ -210,16 +117,6 @@ static char *prune_directory(struct dir_struct *dir, struct pathspec *pathspec,
 		struct dir_entry *entry = *src++;
 		if (dir_path_match(entry, pathspec, prefix, seen))
 			*dst++ = entry;
-		else if (flag & WARN_IMPLICIT_DOT)
-			/*
-			 * "git add -A" was run from a subdirectory with a
-			 * new file outside that directory.
-			 *
-			 * "git add -A" will behave like "git add -A :/"
-			 * instead of "git add -A ." in the future.
-			 * Warn about the coming behavior change.
-			 */
-			warn_pathless_add();
 	}
 	dir->nr = dst - dir->entries;
 	add_pathspec_matches_against_index(pathspec, seen);
@@ -245,23 +142,21 @@ static void refresh(int verbose, const struct pathspec *pathspec)
 int run_add_interactive(const char *revision, const char *patch_mode,
 			const struct pathspec *pathspec)
 {
-	int status, ac, i;
-	const char **args;
+	int status, i;
+	struct argv_array argv = ARGV_ARRAY_INIT;
 
-	args = xcalloc(sizeof(const char *), (pathspec->nr + 6));
-	ac = 0;
-	args[ac++] = "add--interactive";
+	argv_array_push(&argv, "add--interactive");
 	if (patch_mode)
-		args[ac++] = patch_mode;
+		argv_array_push(&argv, patch_mode);
 	if (revision)
-		args[ac++] = revision;
-	args[ac++] = "--";
+		argv_array_push(&argv, revision);
+	argv_array_push(&argv, "--");
 	for (i = 0; i < pathspec->nr; i++)
 		/* pass original pathspec, to be re-parsed */
-		args[ac++] = pathspec->items[i].original;
+		argv_array_push(&argv, pathspec->items[i].original);
 
-	status = run_command_v_opt(args, RUN_GIT_CMD);
-	free(args);
+	status = run_command_v_opt(argv.argv, RUN_GIT_CMD);
+	argv_array_clear(&argv);
 	return status;
 }
 
@@ -338,7 +233,7 @@ N_("The following paths are ignored by one of your .gitignore files:\n");
 static int verbose, show_only, ignored_too, refresh_only;
 static int ignore_add_errors, intent_to_add, ignore_missing;
 
-#define ADDREMOVE_DEFAULT 0 /* Change to 1 in Git 2.0 */
+#define ADDREMOVE_DEFAULT 1
 static int addremove = ADDREMOVE_DEFAULT;
 static int addremove_explicit = -1; /* unspecified */
 
@@ -411,8 +306,6 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 	int add_new_files;
 	int require_pathspec;
 	char *seen = NULL;
-	int implicit_dot = 0;
-	struct update_callback_data update_data;
 
 	git_config(add_config, NULL);
 
@@ -436,36 +329,17 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 	if (addremove && take_worktree_changes)
 		die(_("-A and -u are mutually incompatible"));
 
-	/*
-	 * Warn when "git add pathspec..." was given without "-u" or "-A"
-	 * and pathspec... covers a removed path.
-	 */
-	memset(&update_data, 0, sizeof(update_data));
-	if (!take_worktree_changes && addremove_explicit < 0)
-		update_data.warn_add_would_remove = 1;
-
 	if (!take_worktree_changes && addremove_explicit < 0 && argc)
-		/*
-		 * Turn "git add pathspec..." to "git add -A pathspec..."
-		 * in Git 2.0 but not yet
-		 */
-		; /* addremove = 1; */
+		/* Turn "git add pathspec..." to "git add -A pathspec..." */
+		addremove = 1;
 
 	if (!show_only && ignore_missing)
 		die(_("Option --ignore-missing can only be used together with --dry-run"));
-	if (addremove) {
-		option_with_implicit_dot = "--all";
-		short_option_with_implicit_dot = "-A";
-	}
-	if (take_worktree_changes) {
-		option_with_implicit_dot = "--update";
-		short_option_with_implicit_dot = "-u";
-	}
-	if (option_with_implicit_dot && !argc) {
-		static const char *here[2] = { ".", NULL };
+
+	if ((0 < addremove_explicit || take_worktree_changes) && !argc) {
+		static const char *whole[2] = { ":/", NULL };
 		argc = 1;
-		argv = here;
-		implicit_dot = 1;
+		argv = whole;
 	}
 
 	add_new_files = !take_worktree_changes && !refresh_only;
@@ -478,8 +352,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 		 (intent_to_add ? ADD_CACHE_INTENT : 0) |
 		 (ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
 		 (!(addremove || take_worktree_changes)
-		  ? ADD_CACHE_IGNORE_REMOVAL : 0)) |
-		 (implicit_dot ? ADD_CACHE_IMPLICIT_DOT : 0);
+		  ? ADD_CACHE_IGNORE_REMOVAL : 0));
 
 	if (require_pathspec && argc == 0) {
 		fprintf(stderr, _("Nothing specified, nothing added.\n"));
@@ -513,18 +386,15 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 
 		memset(&empty_pathspec, 0, sizeof(empty_pathspec));
 		/* This picks up the paths that are not tracked */
-		baselen = fill_directory(&dir, implicit_dot ? &empty_pathspec : &pathspec);
+		baselen = fill_directory(&dir, &pathspec);
 		if (pathspec.nr)
-			seen = prune_directory(&dir, &pathspec, baselen,
-					implicit_dot ? WARN_IMPLICIT_DOT : 0);
+			seen = prune_directory(&dir, &pathspec, baselen);
 	}
 
 	if (refresh_only) {
 		refresh(verbose, &pathspec);
 		goto finish;
 	}
-	if (implicit_dot && prefix)
-		refresh_cache(REFRESH_QUIET);
 
 	if (pathspec.nr) {
 		int i;
@@ -564,21 +434,8 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 
 	plug_bulk_checkin();
 
-	if ((flags & ADD_CACHE_IMPLICIT_DOT) && prefix) {
-		/*
-		 * Check for modified files throughout the worktree so
-		 * update_callback has a chance to warn about changes
-		 * outside the cwd.
-		 */
-		update_data.implicit_dot = prefix;
-		update_data.implicit_dot_len = strlen(prefix);
-		free_pathspec(&pathspec);
-		memset(&pathspec, 0, sizeof(pathspec));
-	}
-	update_data.flags = flags & ~ADD_CACHE_IMPLICIT_DOT;
-	update_files_in_cache(prefix, &pathspec, &update_data);
+	exit_status |= add_files_to_cache(prefix, &pathspec, flags);
 
-	exit_status |= !!update_data.add_errors;
 	if (add_new_files)
 		exit_status |= add_files(&dir, flags);
 

builtin/apply.c

@@ -300,11 +300,13 @@ static int fuzzy_matchlines(const char *s1, size_t n1,
 	while ((*last2 == '\r') || (*last2 == '\n'))
 		last2--;
 
-	/* skip leading whitespace */
-	while (isspace(*s1) && (s1 <= last1))
-		s1++;
-	while (isspace(*s2) && (s2 <= last2))
-		s2++;
+	/* skip leading whitespaces, if both begin with whitespace */
+	if (s1 <= last1 && s2 <= last2 && isspace(*s1) && isspace(*s2)) {
+		while (isspace(*s1) && (s1 <= last1))
+			s1++;
+		while (isspace(*s2) && (s2 <= last2))
+			s2++;
+	}
 	/* early return if both lines are empty */
 	if ((s1 > last1) && (s2 > last2))
 		return 1;
@@ -1943,13 +1945,7 @@ static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
 				       size - offset - hdrsize, patch);
 
 	if (!patchsize) {
-		static const char *binhdr[] = {
-			"Binary files ",
-			"Files ",
-			NULL,
-		};
 		static const char git_binary[] = "GIT binary patch\n";
-		int i;
 		int hd = hdrsize + offset;
 		unsigned long llen = linelen(buffer + hd, size - hd);
 
@@ -1965,6 +1961,12 @@ static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
 				patchsize = 0;
 		}
 		else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
+			static const char *binhdr[] = {
+				"Binary files ",
+				"Files ",
+				NULL,
+			};
+			int i;
 			for (i = 0; binhdr[i]; i++) {
 				int len = strlen(binhdr[i]);
 				if (len < size - hd &&
@@ -4152,7 +4154,7 @@ static int use_patch(struct patch *p)
 	/* See if it matches any of exclude/include rule */
 	for (i = 0; i < limit_by_name.nr; i++) {
 		struct string_list_item *it = &limit_by_name.items[i];
-		if (!fnmatch(it->string, pathname, 0))
+		if (!wildmatch(it->string, pathname, 0, NULL))
 			return (it->util != NULL);
 	}
 

builtin/blame.c

@@ -74,7 +74,7 @@ static unsigned blame_copy_score;
 #define BLAME_DEFAULT_MOVE_SCORE	20
 #define BLAME_DEFAULT_COPY_SCORE	40
 
-/* bits #0..7 in revision.h, #8..11 used for merge_bases() in commit.c */
+/* Remember to update object flag allocation in object.h */
 #define METAINFO_SHOWN		(1u<<12)
 #define MORE_THAN_ONE_PATH	(1u<<13)
 
@@ -197,7 +197,6 @@ static void drop_origin_blob(struct origin *o)
  * scoreboard structure, sorted by the target line number.
  */
 struct blame_entry {
-	struct blame_entry *prev;
 	struct blame_entry *next;
 
 	/* the first line of this group in the final image;
@@ -256,15 +255,6 @@ struct scoreboard {
 	int *lineno;
 };
 
-static inline int same_suspect(struct origin *a, struct origin *b)
-{
-	if (a == b)
-		return 1;
-	if (a->commit != b->commit)
-		return 0;
-	return !strcmp(a->path, b->path);
-}
-
 static void sanity_check_refcnt(struct scoreboard *);
 
 /*
@@ -277,13 +267,11 @@ static void coalesce(struct scoreboard *sb)
 	struct blame_entry *ent, *next;
 
 	for (ent = sb->ent; ent && (next = ent->next); ent = next) {
-		if (same_suspect(ent->suspect, next->suspect) &&
+		if (ent->suspect == next->suspect &&
 		    ent->guilty == next->guilty &&
 		    ent->s_lno + ent->num_lines == next->s_lno) {
 			ent->num_lines += next->num_lines;
 			ent->next = next->next;
-			if (ent->next)
-				ent->next->prev = ent;
 			origin_decref(next->suspect);
 			free(next);
 			ent->score = 0;
@@ -534,7 +522,7 @@ static void add_blame_entry(struct scoreboard *sb, struct blame_entry *e)
 		prev = ent;
 
 	/* prev, if not NULL, is the last one that is below e */
-	e->prev = prev;
+
 	if (prev) {
 		e->next = prev->next;
 		prev->next = e;
@@ -543,8 +531,6 @@ static void add_blame_entry(struct scoreboard *sb, struct blame_entry *e)
 		e->next = sb->ent;
 		sb->ent = e;
 	}
-	if (e->next)
-		e->next->prev = e;
 }
 
 /*
@@ -555,14 +541,12 @@ static void add_blame_entry(struct scoreboard *sb, struct blame_entry *e)
  */
 static void dup_entry(struct blame_entry *dst, struct blame_entry *src)
 {
-	struct blame_entry *p, *n;
+	struct blame_entry *n;
 
-	p = dst->prev;
 	n = dst->next;
 	origin_incref(src->suspect);
 	origin_decref(dst->suspect);
 	memcpy(dst, src, sizeof(*src));
-	dst->prev = p;
 	dst->next = n;
 	dst->score = 0;
 }
@@ -742,7 +726,7 @@ static int find_last_in_target(struct scoreboard *sb, struct origin *target)
 	int last_in_target = -1;
 
 	for (e = sb->ent; e; e = e->next) {
-		if (e->guilty || !same_suspect(e->suspect, target))
+		if (e->guilty || e->suspect != target)
 			continue;
 		if (last_in_target < e->s_lno + e->num_lines)
 			last_in_target = e->s_lno + e->num_lines;
@@ -762,7 +746,7 @@ static void blame_chunk(struct scoreboard *sb,
 	struct blame_entry *e;
 
 	for (e = sb->ent; e; e = e->next) {
-		if (e->guilty || !same_suspect(e->suspect, target))
+		if (e->guilty || e->suspect != target)
 			continue;
 		if (same <= e->s_lno)
 			continue;
@@ -939,7 +923,6 @@ static void find_copy_in_blob(struct scoreboard *sb,
 			      mmfile_t *file_p)
 {
 	const char *cp;
-	int cnt;
 	mmfile_t file_o;
 	struct handle_split_cb_data d;
 
@@ -950,13 +933,7 @@ static void find_copy_in_blob(struct scoreboard *sb,
 	 */
 	cp = nth_line(sb, ent->lno);
 	file_o.ptr = (char *) cp;
-	cnt = ent->num_lines;
-
-	while (cnt && cp < sb->final_buf + sb->final_buf_size) {
-		if (*cp++ == '\n')
-			cnt--;
-	}
-	file_o.size = cp - file_o.ptr;
+	file_o.size = nth_line(sb, ent->lno + ent->num_lines) - cp;
 
 	/*
 	 * file_o is a part of final image we are annotating.
@@ -992,7 +969,7 @@ static int find_move_in_parent(struct scoreboard *sb,
 	while (made_progress) {
 		made_progress = 0;
 		for (e = sb->ent; e; e = e->next) {
-			if (e->guilty || !same_suspect(e->suspect, target) ||
+			if (e->guilty || e->suspect != target ||
 			    ent_score(sb, e) < blame_move_score)
 				continue;
 			find_copy_in_blob(sb, e, parent, split, &file_p);
@@ -1027,14 +1004,14 @@ static struct blame_list *setup_blame_list(struct scoreboard *sb,
 
 	for (e = sb->ent, num_ents = 0; e; e = e->next)
 		if (!e->scanned && !e->guilty &&
-		    same_suspect(e->suspect, target) &&
+		    e->suspect == target &&
 		    min_score < ent_score(sb, e))
 			num_ents++;
 	if (num_ents) {
 		blame_list = xcalloc(num_ents, sizeof(struct blame_list));
 		for (e = sb->ent, i = 0; e; e = e->next)
 			if (!e->scanned && !e->guilty &&
-			    same_suspect(e->suspect, target) &&
+			    e->suspect == target &&
 			    min_score < ent_score(sb, e))
 				blame_list[i++].ent = e;
 	}
@@ -1178,7 +1155,7 @@ static void pass_whole_blame(struct scoreboard *sb,
 		origin->file.ptr = NULL;
 	}
 	for (e = sb->ent; e; e = e->next) {
-		if (!same_suspect(e->suspect, origin))
+		if (e->suspect != origin)
 			continue;
 		origin_incref(porigin);
 		origin_decref(e->suspect);
@@ -1567,7 +1544,7 @@ static void assign_blame(struct scoreboard *sb, int opt)
 
 		/* Take responsibility for the remaining entries */
 		for (ent = sb->ent; ent; ent = ent->next)
-			if (same_suspect(ent->suspect, suspect))
+			if (ent->suspect == suspect)
 				found_guilty_entry(ent);
 		origin_decref(suspect);
 
@@ -1579,22 +1556,29 @@ static void assign_blame(struct scoreboard *sb, int opt)
 static const char *format_time(unsigned long time, const char *tz_str,
 			       int show_raw_time)
 {
-	static char time_buf[128];
-	const char *time_str;
-	int time_len;
-	int tz;
+	static struct strbuf time_buf = STRBUF_INIT;
 
+	strbuf_reset(&time_buf);
 	if (show_raw_time) {
-		snprintf(time_buf, sizeof(time_buf), "%lu %s", time, tz_str);
+		strbuf_addf(&time_buf, "%lu %s", time, tz_str);
 	}
 	else {
+		const char *time_str;
+		size_t time_width;
+		int tz;
 		tz = atoi(tz_str);
 		time_str = show_date(time, tz, blame_date_mode);
-		time_len = strlen(time_str);
-		memcpy(time_buf, time_str, time_len);
-		memset(time_buf + time_len, ' ', blame_date_width - time_len);
+		strbuf_addstr(&time_buf, time_str);
+		/*
+		 * Add space paddings to time_buf to display a fixed width
+		 * string, and use time_width for display width calibration.
+		 */
+		for (time_width = utf8_strwidth(time_str);
+		     time_width < blame_date_width;
+		     time_width++)
+			strbuf_addch(&time_buf, ' ');
 	}
-	return time_buf;
+	return time_buf.buf;
 }
 
 #define OUTPUT_ANNOTATE_COMPAT	001
@@ -1772,25 +1756,41 @@ static int prepare_lines(struct scoreboard *sb)
 {
 	const char *buf = sb->final_buf;
 	unsigned long len = sb->final_buf_size;
-	int num = 0, incomplete = 0, bol = 1;
+	const char *end = buf + len;
+	const char *p;
+	int *lineno;
+	int num = 0, incomplete = 0;
 
-	if (len && buf[len-1] != '\n')
-		incomplete++; /* incomplete line at the end */
-	while (len--) {
-		if (bol) {
-			sb->lineno = xrealloc(sb->lineno,
-					      sizeof(int *) * (num + 1));
-			sb->lineno[num] = buf - sb->final_buf;
-			bol = 0;
-		}
-		if (*buf++ == '\n') {
+	for (p = buf;;) {
+		p = memchr(p, '\n', end - p);
+		if (p) {
+			p++;
 			num++;
-			bol = 1;
+			continue;
 		}
+		break;
 	}
-	sb->lineno = xrealloc(sb->lineno,
-			      sizeof(int *) * (num + incomplete + 1));
-	sb->lineno[num + incomplete] = buf - sb->final_buf;
+
+	if (len && end[-1] != '\n')
+		incomplete++; /* incomplete line at the end */
+
+	sb->lineno = xmalloc(sizeof(*sb->lineno) * (num + incomplete + 1));
+	lineno = sb->lineno;
+
+	*lineno++ = 0;
+	for (p = buf;;) {
+		p = memchr(p, '\n', end - p);
+		if (p) {
+			p++;
+			*lineno++ = p - buf;
+			continue;
+		}
+		break;
+	}
+
+	if (incomplete)
+		*lineno++ = len;
+
 	sb->num_lines = num + incomplete;
 	return sb->num_lines;
 }
@@ -2095,7 +2095,6 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 		if (strbuf_read(&buf, 0, 0) < 0)
 			die_errno("failed to read from stdin");
 	}
-	convert_to_git(path, buf.buf, buf.len, &buf, 0);
 	origin->file.ptr = buf.buf;
 	origin->file.size = buf.len;
 	pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_sha1);
@@ -2338,7 +2337,14 @@ parse_done:
 		blame_date_width = sizeof("2006-10-19");
 		break;
 	case DATE_RELATIVE:
-		/* "normal" is used as the fallback for "relative" */
+		/* TRANSLATORS: This string is used to tell us the maximum
+		   display width for a relative timestamp in "git blame"
+		   output.  For C locale, "4 years, 11 months ago", which
+		   takes 22 places, is the longest among various forms of
+		   relative timestamps, but your language may need more or
+		   fewer display columns. */
+		blame_date_width = utf8_strwidth(_("4 years, 11 months ago")) + 1; /* add the null */
+		break;
 	case DATE_LOCAL:
 	case DATE_NORMAL:
 		blame_date_width = sizeof("Thu Oct 19 16:00:04 2006 -0700");
@@ -2502,8 +2508,6 @@ parse_done:
 		ent->suspect = o;
 		ent->s_lno = bottom;
 		ent->next = next;
-		if (next)
-			next->prev = ent;
 		origin_incref(o);
 	}
 	origin_decref(o);

builtin/branch.c

@@ -315,7 +315,7 @@ static int match_patterns(const char **pattern, const char *refname)
 	if (!*pattern)
 		return 1; /* no pattern always matches */
 	while (*pattern) {
-		if (!fnmatch(*pattern, refname, 0))
+		if (!wildmatch(*pattern, refname, 0, NULL))
 			return 1;
 		pattern++;
 	}

builtin/cat-file.c

@@ -269,6 +269,8 @@ static int batch_objects(struct batch_options *opt)
 {
 	struct strbuf buf = STRBUF_INIT;
 	struct expand_data data;
+	int save_warning;
+	int retval = 0;
 
 	if (!opt->format)
 		opt->format = "%(objectname) %(objecttype) %(objectsize)";
@@ -297,11 +299,10 @@ static int batch_objects(struct batch_options *opt)
 	 * warn) ends up dwarfing the actual cost of the object lookups
 	 * themselves. We can work around it by just turning off the warning.
 	 */
+	save_warning = warn_on_object_refname_ambiguity;
 	warn_on_object_refname_ambiguity = 0;
 
 	while (strbuf_getline(&buf, stdin, '\n') != EOF) {
-		int error;
-
 		if (data.split_on_whitespace) {
 			/*
 			 * Split at first whitespace, tying off the beginning
@@ -316,12 +317,14 @@ static int batch_objects(struct batch_options *opt)
 			data.rest = p;
 		}
 
-		error = batch_one_object(buf.buf, opt, &data);
-		if (error)
-			return error;
+		retval = batch_one_object(buf.buf, opt, &data);
+		if (retval)
+			break;
 	}
 
-	return 0;
+	strbuf_release(&buf);
+	warn_on_object_refname_ambiguity = save_warning;
+	return retval;
 }
 
 static const char * const cat_file_usage[] = {

builtin/checkout.c

@@ -1095,7 +1095,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
 		OPT_BOOL(0, "detach", &opts.force_detach, N_("detach the HEAD at named commit")),
 		OPT_SET_INT('t', "track",  &opts.track, N_("set upstream info for new branch"),
 			BRANCH_TRACK_EXPLICIT),
-		OPT_STRING(0, "orphan", &opts.new_orphan_branch, N_("new branch"), N_("new unparented branch")),
+		OPT_STRING(0, "orphan", &opts.new_orphan_branch, N_("new-branch"), N_("new unparented branch")),
 		OPT_SET_INT('2', "ours", &opts.writeout_stage, N_("checkout our version for unmerged files"),
 			    2),
 		OPT_SET_INT('3', "theirs", &opts.writeout_stage, N_("checkout their version for unmerged files"),

builtin/clean.c

@@ -154,7 +154,7 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 	DIR *dir;
 	struct strbuf quoted = STRBUF_INIT;
 	struct dirent *e;
-	int res = 0, ret = 0, gone = 1, original_len = path->len, len, i;
+	int res = 0, ret = 0, gone = 1, original_len = path->len, len;
 	unsigned char submodule_head[20];
 	struct string_list dels = STRING_LIST_INIT_DUP;
 
@@ -242,6 +242,7 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 	}
 
 	if (!*dir_gone && !quiet) {
+		int i;
 		for (i = 0; i < dels.nr; i++)
 			printf(dry_run ?  _(msg_would_remove) : _(msg_remove), dels.items[i].string);
 	}

builtin/commit-tree.c

@@ -12,6 +12,8 @@
 
 static const char commit_tree_usage[] = "git commit-tree [(-p <sha1>)...] [-S[<keyid>]] [-m <message>] [-F <file>] <sha1> <changelog";
 
+static const char *sign_commit;
+
 static void new_parent(struct commit *parent, struct commit_list **parents_p)
 {
 	unsigned char *sha1 = parent->object.sha1;
@@ -31,6 +33,10 @@ static int commit_tree_config(const char *var, const char *value, void *cb)
 	int status = git_gpg_config(var, value, NULL);
 	if (status)
 		return status;
+	if (!strcmp(var, "commit.gpgsign")) {
+		sign_commit = git_config_bool(var, value) ? "" : NULL;
+		return 0;
+	}
 	return git_default_config(var, value, cb);
 }
 
@@ -41,7 +47,6 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 	unsigned char tree_sha1[20];
 	unsigned char commit_sha1[20];
 	struct strbuf buffer = STRBUF_INIT;
-	const char *sign_commit = NULL;
 
 	git_config(commit_tree_config, NULL);
 
@@ -66,6 +71,11 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 			continue;
 		}
 
+		if (!strcmp(arg, "--no-gpg-sign")) {
+			sign_commit = NULL;
+			continue;
+		}
+
 		if (!strcmp(arg, "-m")) {
 			if (argc <= ++i)
 				usage(commit_tree_usage);

builtin/commit.c

@@ -113,6 +113,7 @@ static char *sign_commit;
 static enum {
 	CLEANUP_SPACE,
 	CLEANUP_NONE,
+	CLEANUP_SCISSORS,
 	CLEANUP_ALL
 } cleanup_mode;
 static const char *cleanup_arg;
@@ -307,7 +308,6 @@ static char *prepare_index(int argc, const char **argv, const char *prefix,
 	int fd;
 	struct string_list partial;
 	struct pathspec pathspec;
-	char *old_index_env = NULL;
 	int refresh_flags = REFRESH_QUIET;
 
 	if (is_status)
@@ -320,6 +320,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix,
 		die(_("index file corrupt"));
 
 	if (interactive) {
+		char *old_index_env = NULL;
 		fd = hold_locked_index(&index_lock, 1);
 
 		refresh_cache_or_die(refresh_flags);
@@ -600,12 +601,10 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 {
 	struct stat statbuf;
 	struct strbuf committer_ident = STRBUF_INIT;
-	int commitable, saved_color_setting;
+	int commitable;
 	struct strbuf sb = STRBUF_INIT;
-	char *buffer;
 	const char *hook_arg1 = NULL;
 	const char *hook_arg2 = NULL;
-	int ident_shown = 0;
 	int clean_message_contents = (cleanup_mode != CLEANUP_NONE);
 	int old_display_comment_prefix;
 
@@ -649,10 +648,10 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 				  logfile);
 		hook_arg1 = "message";
 	} else if (use_message) {
+		char *buffer;
 		buffer = strstr(use_message_buffer, "\n\n");
-		if (!use_editor && (!buffer || buffer[2] == '\0'))
-			die(_("commit has empty message"));
-		strbuf_add(&sb, buffer + 2, strlen(buffer + 2));
+		if (buffer)
+			strbuf_add(&sb, buffer + 2, strlen(buffer + 2));
 		hook_arg1 = "commit";
 		hook_arg2 = use_message;
 	} else if (fixup_message) {
@@ -753,8 +752,12 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 	/* This checks if committer ident is explicitly given */
 	strbuf_addstr(&committer_ident, git_committer_info(IDENT_STRICT));
 	if (use_editor && include_status) {
+		int ident_shown = 0;
+		int saved_color_setting;
 		char *ai_tmp, *ci_tmp;
-		if (whence != FROM_COMMIT)
+		if (whence != FROM_COMMIT) {
+			if (cleanup_mode == CLEANUP_SCISSORS)
+				wt_status_add_cut_line(s->fp);
 			status_printf_ln(s, GIT_COLOR_NORMAL,
 			    whence == FROM_MERGE
 				? _("\n"
@@ -770,6 +773,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 				git_path(whence == FROM_MERGE
 					 ? "MERGE_HEAD"
 					 : "CHERRY_PICK_HEAD"));
+		}
 
 		fprintf(s->fp, "\n");
 		if (cleanup_mode == CLEANUP_ALL)
@@ -777,6 +781,8 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 				_("Please enter the commit message for your changes."
 				  " Lines starting\nwith '%c' will be ignored, and an empty"
 				  " message aborts the commit.\n"), comment_line_char);
+		else if (cleanup_mode == CLEANUP_SCISSORS && whence == FROM_COMMIT)
+			wt_status_add_cut_line(s->fp);
 		else /* CLEANUP_SPACE, that is. */
 			status_printf(s, GIT_COLOR_NORMAL,
 				_("Please enter the commit message for your changes."
@@ -826,8 +832,22 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 
 		if (get_sha1(parent, sha1))
 			commitable = !!active_nr;
-		else
-			commitable = index_differs_from(parent, 0);
+		else {
+			/*
+			 * Unless the user did explicitly request a submodule
+			 * ignore mode by passing a command line option we do
+			 * not ignore any changed submodule SHA-1s when
+			 * comparing index and parent, no matter what is
+			 * configured. Otherwise we won't commit any
+			 * submodules which were manually staged, which would
+			 * be really confusing.
+			 */
+			int diff_flags = DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG;
+			if (ignore_submodule_arg &&
+			    !strcmp(ignore_submodule_arg, "all"))
+				diff_flags |= DIFF_OPT_IGNORE_SUBMODULES;
+			commitable = index_differs_from(parent, diff_flags);
+		}
 	}
 	strbuf_release(&committer_ident);
 
@@ -1130,6 +1150,8 @@ static int parse_and_validate_options(int argc, const char *argv[],
 		cleanup_mode = CLEANUP_SPACE;
 	else if (!strcmp(cleanup_arg, "strip"))
 		cleanup_mode = CLEANUP_ALL;
+	else if (!strcmp(cleanup_arg, "scissors"))
+		cleanup_mode = use_editor ? CLEANUP_SCISSORS : CLEANUP_SPACE;
 	else
 		die(_("Invalid cleanup mode %s"), cleanup_arg);
 
@@ -1404,6 +1426,10 @@ static int git_commit_config(const char *k, const char *v, void *cb)
 	}
 	if (!strcmp(k, "commit.cleanup"))
 		return git_config_string(&cleanup_arg, k, v);
+	if (!strcmp(k, "commit.gpgsign")) {
+		sign_commit = git_config_bool(k, v) ? "" : NULL;
+		return 0;
+	}
 
 	status = git_gpg_config(k, v, NULL);
 	if (status)
@@ -1488,7 +1514,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		OPT_BOOL('e', "edit", &edit_flag, N_("force edit of commit")),
 		OPT_STRING(0, "cleanup", &cleanup_arg, N_("default"), N_("how to strip spaces and #comments from message")),
 		OPT_BOOL(0, "status", &include_status, N_("include status in commit message template")),
-		{ OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key id"),
+		{ OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key-id"),
 		  N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
 		/* end commit message options */
 
@@ -1531,7 +1557,6 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 	struct ref_lock *ref_lock;
 	struct commit_list *parents = NULL, **pptr = &parents;
 	struct stat statbuf;
-	int allow_fast_forward = 1;
 	struct commit *current_head = NULL;
 	struct commit_extra_header *extra = NULL;
 
@@ -1579,6 +1604,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 	} else if (whence == FROM_MERGE) {
 		struct strbuf m = STRBUF_INIT;
 		FILE *fp;
+		int allow_fast_forward = 1;
 
 		if (!reflog_msg)
 			reflog_msg = "commit (merge)";
@@ -1621,8 +1647,8 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		die(_("could not read commit message: %s"), strerror(saved_errno));
 	}
 
-	/* Truncate the message just before the diff, if any. */
-	if (verbose)
+	if (verbose || /* Truncate the message just before the diff, if any. */
+	    cleanup_mode == CLEANUP_SCISSORS)
 		wt_status_truncate_message_at_cut_line(&sb);
 
 	if (cleanup_mode != CLEANUP_NONE)

builtin/config.c

@@ -21,8 +21,7 @@ static char key_delim = ' ';
 static char term = '\n';
 
 static int use_global_config, use_system_config, use_local_config;
-static const char *given_config_file;
-static const char *given_config_blob;
+static struct git_config_source given_config_source;
 static int actions, types;
 static const char *get_color_slot, *get_colorbool_slot;
 static int end_null;
@@ -55,8 +54,8 @@ static struct option builtin_config_options[] = {
 	OPT_BOOL(0, "global", &use_global_config, N_("use global config file")),
 	OPT_BOOL(0, "system", &use_system_config, N_("use system config file")),
 	OPT_BOOL(0, "local", &use_local_config, N_("use repository config file")),
-	OPT_STRING('f', "file", &given_config_file, N_("file"), N_("use given config file")),
-	OPT_STRING(0, "blob", &given_config_blob, N_("blob-id"), N_("read config from given blob object")),
+	OPT_STRING('f', "file", &given_config_source.file, N_("file"), N_("use given config file")),
+	OPT_STRING(0, "blob", &given_config_source.blob, N_("blob-id"), N_("read config from given blob object")),
 	OPT_GROUP(N_("Action")),
 	OPT_BIT(0, "get", &actions, N_("get value: name [value-regex]"), ACTION_GET),
 	OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-regex]"), ACTION_GET_ALL),
@@ -224,8 +223,7 @@ static int get_value(const char *key_, const char *regex_)
 	}
 
 	git_config_with_options(collect_config, &values,
-				given_config_file, given_config_blob,
-				respect_includes);
+				&given_config_source, respect_includes);
 
 	ret = !values.nr;
 
@@ -309,8 +307,7 @@ static void get_color(const char *def_color)
 	get_color_found = 0;
 	parsed_color[0] = '\0';
 	git_config_with_options(git_get_color_config, NULL,
-				given_config_file, given_config_blob,
-				respect_includes);
+				&given_config_source, respect_includes);
 
 	if (!get_color_found && def_color)
 		color_parse(def_color, "command line", parsed_color);
@@ -339,8 +336,7 @@ static int get_colorbool(int print)
 	get_diff_color_found = -1;
 	get_color_ui_found = -1;
 	git_config_with_options(git_get_colorbool_config, NULL,
-				given_config_file, given_config_blob,
-				respect_includes);
+				&given_config_source, respect_includes);
 
 	if (get_colorbool_found < 0) {
 		if (!strcmp(get_colorbool_slot, "color.diff"))
@@ -362,9 +358,12 @@ static int get_colorbool(int print)
 		return get_colorbool_found ? 0 : 1;
 }
 
-static void check_blob_write(void)
+static void check_write(void)
 {
-	if (given_config_blob)
+	if (given_config_source.use_stdin)
+		die("writing to stdin is not supported");
+
+	if (given_config_source.blob)
 		die("writing config blobs is not supported");
 }
 
@@ -435,7 +434,7 @@ static int get_urlmatch(const char *var, const char *url)
 	}
 
 	git_config_with_options(urlmatch_config_entry, &config,
-				given_config_file, NULL, respect_includes);
+				&given_config_source, respect_includes);
 
 	for_each_string_list_item(item, &values) {
 		struct urlmatch_current_candidate_value *matched = item->util;
@@ -464,18 +463,24 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 	int nongit = !startup_info->have_repository;
 	char *value;
 
-	given_config_file = getenv(CONFIG_ENVIRONMENT);
+	given_config_source.file = getenv(CONFIG_ENVIRONMENT);
 
 	argc = parse_options(argc, argv, prefix, builtin_config_options,
 			     builtin_config_usage,
 			     PARSE_OPT_STOP_AT_NON_OPTION);
 
 	if (use_global_config + use_system_config + use_local_config +
-	    !!given_config_file + !!given_config_blob > 1) {
+	    !!given_config_source.file + !!given_config_source.blob > 1) {
 		error("only one config file at a time.");
 		usage_with_options(builtin_config_usage, builtin_config_options);
 	}
 
+	if (given_config_source.file &&
+			!strcmp(given_config_source.file, "-")) {
+		given_config_source.file = NULL;
+		given_config_source.use_stdin = 1;
+	}
+
 	if (use_global_config) {
 		char *user_config = NULL;
 		char *xdg_config = NULL;
@@ -493,24 +498,24 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 
 		if (access_or_warn(user_config, R_OK, 0) &&
 		    xdg_config && !access_or_warn(xdg_config, R_OK, 0))
-			given_config_file = xdg_config;
+			given_config_source.file = xdg_config;
 		else
-			given_config_file = user_config;
+			given_config_source.file = user_config;
 	}
 	else if (use_system_config)
-		given_config_file = git_etc_gitconfig();
+		given_config_source.file = git_etc_gitconfig();
 	else if (use_local_config)
-		given_config_file = git_pathdup("config");
-	else if (given_config_file) {
-		if (!is_absolute_path(given_config_file) && prefix)
-			given_config_file =
+		given_config_source.file = git_pathdup("config");
+	else if (given_config_source.file) {
+		if (!is_absolute_path(given_config_source.file) && prefix)
+			given_config_source.file =
 				xstrdup(prefix_filename(prefix,
 							strlen(prefix),
-							given_config_file));
+							given_config_source.file));
 	}
 
 	if (respect_includes == -1)
-		respect_includes = !given_config_file;
+		respect_includes = !given_config_source.file;
 
 	if (end_null) {
 		term = '\0';
@@ -549,57 +554,58 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 	if (actions == ACTION_LIST) {
 		check_argc(argc, 0, 0);
 		if (git_config_with_options(show_all_config, NULL,
-					    given_config_file,
-					    given_config_blob,
+					    &given_config_source,
 					    respect_includes) < 0) {
-			if (given_config_file)
+			if (given_config_source.file)
 				die_errno("unable to read config file '%s'",
-					  given_config_file);
+					  given_config_source.file);
 			else
 				die("error processing config file(s)");
 		}
 	}
 	else if (actions == ACTION_EDIT) {
 		check_argc(argc, 0, 0);
-		if (!given_config_file && nongit)
+		if (!given_config_source.file && nongit)
 			die("not in a git directory");
-		if (given_config_blob)
+		if (given_config_source.use_stdin)
+			die("editing stdin is not supported");
+		if (given_config_source.blob)
 			die("editing blobs is not supported");
 		git_config(git_default_config, NULL);
-		launch_editor(given_config_file ?
-			      given_config_file : git_path("config"),
+		launch_editor(given_config_source.file ?
+			      given_config_source.file : git_path("config"),
 			      NULL, NULL);
 	}
 	else if (actions == ACTION_SET) {
 		int ret;
-		check_blob_write();
+		check_write();
 		check_argc(argc, 2, 2);
 		value = normalize_value(argv[0], argv[1]);
-		ret = git_config_set_in_file(given_config_file, argv[0], value);
+		ret = git_config_set_in_file(given_config_source.file, argv[0], value);
 		if (ret == CONFIG_NOTHING_SET)
 			error("cannot overwrite multiple values with a single value\n"
 			"       Use a regexp, --add or --replace-all to change %s.", argv[0]);
 		return ret;
 	}
 	else if (actions == ACTION_SET_ALL) {
-		check_blob_write();
+		check_write();
 		check_argc(argc, 2, 3);
 		value = normalize_value(argv[0], argv[1]);
-		return git_config_set_multivar_in_file(given_config_file,
+		return git_config_set_multivar_in_file(given_config_source.file,
 						       argv[0], value, argv[2], 0);
 	}
 	else if (actions == ACTION_ADD) {
-		check_blob_write();
+		check_write();
 		check_argc(argc, 2, 2);
 		value = normalize_value(argv[0], argv[1]);
-		return git_config_set_multivar_in_file(given_config_file,
+		return git_config_set_multivar_in_file(given_config_source.file,
 						       argv[0], value, "^$", 0);
 	}
 	else if (actions == ACTION_REPLACE_ALL) {
-		check_blob_write();
+		check_write();
 		check_argc(argc, 2, 3);
 		value = normalize_value(argv[0], argv[1]);
-		return git_config_set_multivar_in_file(given_config_file,
+		return git_config_set_multivar_in_file(given_config_source.file,
 						       argv[0], value, argv[2], 1);
 	}
 	else if (actions == ACTION_GET) {
@@ -623,26 +629,26 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 		return get_urlmatch(argv[0], argv[1]);
 	}
 	else if (actions == ACTION_UNSET) {
-		check_blob_write();
+		check_write();
 		check_argc(argc, 1, 2);
 		if (argc == 2)
-			return git_config_set_multivar_in_file(given_config_file,
+			return git_config_set_multivar_in_file(given_config_source.file,
 							       argv[0], NULL, argv[1], 0);
 		else
-			return git_config_set_in_file(given_config_file,
+			return git_config_set_in_file(given_config_source.file,
 						      argv[0], NULL);
 	}
 	else if (actions == ACTION_UNSET_ALL) {
-		check_blob_write();
+		check_write();
 		check_argc(argc, 1, 2);
-		return git_config_set_multivar_in_file(given_config_file,
+		return git_config_set_multivar_in_file(given_config_source.file,
 						       argv[0], NULL, argv[1], 1);
 	}
 	else if (actions == ACTION_RENAME_SECTION) {
 		int ret;
-		check_blob_write();
+		check_write();
 		check_argc(argc, 2, 2);
-		ret = git_config_rename_section_in_file(given_config_file,
+		ret = git_config_rename_section_in_file(given_config_source.file,
 							argv[0], argv[1]);
 		if (ret < 0)
 			return ret;
@@ -651,9 +657,9 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 	}
 	else if (actions == ACTION_REMOVE_SECTION) {
 		int ret;
-		check_blob_write();
+		check_write();
 		check_argc(argc, 1, 1);
-		ret = git_config_rename_section_in_file(given_config_file,
+		ret = git_config_rename_section_in_file(given_config_source.file,
 							argv[0], NULL);
 		if (ret < 0)
 			return ret;

builtin/describe.c

@@ -6,7 +6,7 @@
 #include "exec_cmd.h"
 #include "parse-options.h"
 #include "diff.h"
-#include "hash.h"
+#include "hashmap.h"
 #include "argv-array.h"
 
 #define SEEN		(1u << 0)
@@ -25,7 +25,7 @@ static int longformat;
 static int first_parent;
 static int abbrev = -1; /* unspecified */
 static int max_candidates = 10;
-static struct hash_table names;
+static struct hashmap names;
 static int have_util;
 static const char *pattern;
 static int always;
@@ -37,7 +37,7 @@ static const char *diff_index_args[] = {
 };
 
 struct commit_name {
-	struct commit_name *next;
+	struct hashmap_entry entry;
 	unsigned char peeled[20];
 	struct tag *tag;
 	unsigned prio:2; /* annotated tag = 2, tag = 1, head = 0 */
@@ -50,6 +50,12 @@ static const char *prio_names[] = {
 	"head", "lightweight", "annotated",
 };
 
+static int commit_name_cmp(const struct commit_name *cn1,
+		const struct commit_name *cn2, const void *peeled)
+{
+	return hashcmp(cn1->peeled, peeled ? peeled : cn2->peeled);
+}
+
 static inline unsigned int hash_sha1(const unsigned char *sha1)
 {
 	unsigned int hash;
@@ -59,21 +65,9 @@ static inline unsigned int hash_sha1(const unsigned char *sha1)
 
 static inline struct commit_name *find_commit_name(const unsigned char *peeled)
 {
-	struct commit_name *n = lookup_hash(hash_sha1(peeled), &names);
-	while (n && !!hashcmp(peeled, n->peeled))
-		n = n->next;
-	return n;
-}
-
-static int set_util(void *chain, void *data)
-{
-	struct commit_name *n;
-	for (n = chain; n; n = n->next) {
-		struct commit *c = lookup_commit_reference_gently(n->peeled, 1);
-		if (c)
-			c->util = n;
-	}
-	return 0;
+	struct commit_name key;
+	hashmap_entry_init(&key, hash_sha1(peeled));
+	return hashmap_get(&names, &key, peeled);
 }
 
 static int replace_name(struct commit_name *e,
@@ -118,16 +112,10 @@ static void add_to_known_names(const char *path,
 	struct tag *tag = NULL;
 	if (replace_name(e, prio, sha1, &tag)) {
 		if (!e) {
-			void **pos;
 			e = xmalloc(sizeof(struct commit_name));
 			hashcpy(e->peeled, peeled);
-			pos = insert_hash(hash_sha1(peeled), e, &names);
-			if (pos) {
-				e->next = *pos;
-				*pos = e;
-			} else {
-				e->next = NULL;
-			}
+			hashmap_entry_init(e, hash_sha1(peeled));
+			hashmap_add(&names, e);
 			e->path = NULL;
 		}
 		e->tag = tag;
@@ -150,7 +138,7 @@ static int get_name(const char *path, const unsigned char *sha1, int flag, void
 		return 0;
 
 	/* Accept only tags that match the pattern, if given */
-	if (pattern && (!is_tag || fnmatch(pattern, path + 10, 0)))
+	if (pattern && (!is_tag || wildmatch(pattern, path + 10, 0, NULL)))
 		return 0;
 
 	/* Is it annotated? */
@@ -292,7 +280,14 @@ static void describe(const char *arg, int last_one)
 		fprintf(stderr, _("searching to describe %s\n"), arg);
 
 	if (!have_util) {
-		for_each_hash(&names, set_util, NULL);
+		struct hashmap_iter iter;
+		struct commit *c;
+		struct commit_name *n = hashmap_iter_first(&names, &iter);
+		for (; n; n = hashmap_iter_next(&iter)) {
+			c = lookup_commit_reference_gently(n->peeled, 1);
+			if (c)
+				c->util = n;
+		}
 		have_util = 1;
 	}
 
@@ -463,9 +458,9 @@ int cmd_describe(int argc, const char **argv, const char *prefix)
 		return cmd_name_rev(args.argc, args.argv, prefix);
 	}
 
-	init_hash(&names);
+	hashmap_init(&names, (hashmap_cmp_fn) commit_name_cmp, 0);
 	for_each_rawref(get_name, NULL);
-	if (!names.nr && !always)
+	if (!names.size && !always)
 		die(_("No names found, cannot describe anything."));
 
 	if (argc == 0) {

builtin/fetch.c

@@ -1026,7 +1026,6 @@ static int fetch_multiple(struct string_list *list)
 
 static int fetch_one(struct remote *remote, int argc, const char **argv)
 {
-	int i;
 	static const char **refs = NULL;
 	struct refspec *refspec;
 	int ref_nr = 0;
@@ -1050,6 +1049,7 @@ static int fetch_one(struct remote *remote, int argc, const char **argv)
 
 	if (argc > 0) {
 		int j = 0;
+		int i;
 		refs = xcalloc(argc + 1, sizeof(const char *));
 		for (i = 0; i < argc; i++) {
 			if (!strcmp(argv[i], "tag")) {

builtin/for-each-ref.c

@@ -864,7 +864,7 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
 			     refname[plen] == '/' ||
 			     p[plen-1] == '/'))
 				break;
-			if (!fnmatch(p, refname, FNM_PATHNAME))
+			if (!wildmatch(p, refname, WM_PATHNAME, NULL))
 				break;
 		}
 		if (!*pattern)

builtin/fsck.c

@@ -144,7 +144,7 @@ static int traverse_reachable(void)
 	unsigned int nr = 0;
 	int result = 0;
 	if (show_progress)
-		progress = start_progress_delay("Checking connectivity", 0, 0, 2);
+		progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
 	while (pending.nr) {
 		struct object_array_entry *entry;
 		struct object *obj;
@@ -541,7 +541,7 @@ static void fsck_object_dir(const char *path)
 		fprintf(stderr, "Checking object directory\n");
 
 	if (show_progress)
-		progress = start_progress("Checking object directories", 256);
+		progress = start_progress(_("Checking object directories"), 256);
 	for (i = 0; i < 256; i++) {
 		static char dir[4096];
 		sprintf(dir, "%s/%02x", path, i);
@@ -630,7 +630,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 	struct alternate_object_database *alt;
 
 	errors_found = 0;
-	read_replace_refs = 0;
+	check_replace_refs = 0;
 
 	argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
 
@@ -670,7 +670,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 				total += p->num_objects;
 			}
 
-			progress = start_progress("Checking objects", total);
+			progress = start_progress(_("Checking objects"), total);
 		}
 		for (p = packed_git; p; p = p->next) {
 			/* verify gives error messages itself */

builtin/gc.c

@@ -26,9 +26,12 @@ static const char * const builtin_gc_usage[] = {
 };
 
 static int pack_refs = 1;
+static int prune_reflogs = 1;
+static int aggressive_depth = 250;
 static int aggressive_window = 250;
 static int gc_auto_threshold = 6700;
 static int gc_auto_pack_limit = 50;
+static int detach_auto = 1;
 static const char *prune_expire = "2.weeks.ago";
 
 static struct argv_array pack_refs_cmd = ARGV_ARRAY_INIT;
@@ -65,6 +68,10 @@ static int gc_config(const char *var, const char *value, void *cb)
 		aggressive_window = git_config_int(var, value);
 		return 0;
 	}
+	if (!strcmp(var, "gc.aggressivedepth")) {
+		aggressive_depth = git_config_int(var, value);
+		return 0;
+	}
 	if (!strcmp(var, "gc.auto")) {
 		gc_auto_threshold = git_config_int(var, value);
 		return 0;
@@ -73,6 +80,10 @@ static int gc_config(const char *var, const char *value, void *cb)
 		gc_auto_pack_limit = git_config_int(var, value);
 		return 0;
 	}
+	if (!strcmp(var, "gc.autodetach")) {
+		detach_auto = git_config_bool(var, value);
+		return 0;
+	}
 	if (!strcmp(var, "gc.pruneexpire")) {
 		if (value && strcmp(value, "now")) {
 			unsigned long now = approxidate("now");
@@ -188,13 +199,12 @@ static int need_to_gc(void)
 static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
 {
 	static struct lock_file lock;
-	static char locking_host[128];
 	char my_host[128];
 	struct strbuf sb = STRBUF_INIT;
 	struct stat st;
 	uintmax_t pid;
 	FILE *fp;
-	int fd, should_exit;
+	int fd;
 
 	if (pidfile)
 		/* already locked */
@@ -206,6 +216,8 @@ static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
 	fd = hold_lock_file_for_update(&lock, git_path("gc.pid"),
 				       LOCK_DIE_ON_ERROR);
 	if (!force) {
+		static char locking_host[128];
+		int should_exit;
 		fp = fopen(git_path("gc.pid"), "r");
 		memset(locking_host, 0, sizeof(locking_host));
 		should_exit =
@@ -247,6 +259,19 @@ static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
 	return NULL;
 }
 
+static int gc_before_repack(void)
+{
+	if (pack_refs && run_command_v_opt(pack_refs_cmd.argv, RUN_GIT_CMD))
+		return error(FAILED_RUN, pack_refs_cmd.argv[0]);
+
+	if (prune_reflogs && run_command_v_opt(reflog.argv, RUN_GIT_CMD))
+		return error(FAILED_RUN, reflog.argv[0]);
+
+	pack_refs = 0;
+	prune_reflogs = 0;
+	return 0;
+}
+
 int cmd_gc(int argc, const char **argv, const char *prefix)
 {
 	int aggressive = 0;
@@ -288,7 +313,8 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 
 	if (aggressive) {
 		argv_array_push(&repack, "-f");
-		argv_array_push(&repack, "--depth=250");
+		if (aggressive_depth > 0)
+			argv_array_pushf(&repack, "--depth=%d", aggressive_depth);
 		if (aggressive_window > 0)
 			argv_array_pushf(&repack, "--window=%d", aggressive_window);
 	}
@@ -301,11 +327,22 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 		 */
 		if (!need_to_gc())
 			return 0;
-		if (!quiet)
-			fprintf(stderr,
-					_("Auto packing the repository for optimum performance. You may also\n"
-					"run \"git gc\" manually. See "
-					"\"git help gc\" for more information.\n"));
+		if (!quiet) {
+			if (detach_auto)
+				fprintf(stderr, _("Auto packing the repository in background for optimum performance.\n"));
+			else
+				fprintf(stderr, _("Auto packing the repository for optimum performance.\n"));
+			fprintf(stderr, _("See \"git help gc\" for manual housekeeping.\n"));
+		}
+		if (detach_auto) {
+			if (gc_before_repack())
+				return -1;
+			/*
+			 * failure to daemonize is ok, we'll continue
+			 * in foreground
+			 */
+			daemonize();
+		}
 	} else
 		add_repack_all_option();
 
@@ -317,11 +354,8 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 		    name, (uintmax_t)pid);
 	}
 
-	if (pack_refs && run_command_v_opt(pack_refs_cmd.argv, RUN_GIT_CMD))
-		return error(FAILED_RUN, pack_refs_cmd.argv[0]);
-
-	if (run_command_v_opt(reflog.argv, RUN_GIT_CMD))
-		return error(FAILED_RUN, reflog.argv[0]);
+	if (gc_before_repack())
+		return -1;
 
 	if (run_command_v_opt(repack.argv, RUN_GIT_CMD))
 		return error(FAILED_RUN, repack.argv[0]);

builtin/grep.c

@@ -874,6 +874,9 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 		if (len > 4 && is_dir_sep(pager[len - 5]))
 			pager += len - 4;
 
+		if (opt.ignore_case && !strcmp("less", pager))
+			string_list_append(&path_list, "-I");
+
 		if (!strcmp("less", pager) || !strcmp("vi", pager)) {
 			struct strbuf buf = STRBUF_INIT;
 			strbuf_addf(&buf, "+/%s%s",

builtin/index-pack.c

@@ -40,17 +40,13 @@ struct base_data {
 	int ofs_first, ofs_last;
 };
 
-#if !defined(NO_PTHREADS) && defined(NO_THREAD_SAFE_PREAD)
-/* pread() emulation is not thread-safe. Disable threading. */
-#define NO_PTHREADS
-#endif
-
 struct thread_local {
 #ifndef NO_PTHREADS
 	pthread_t thread;
 #endif
 	struct base_data *base_cache;
 	size_t base_cache_used;
+	int pack_fd;
 };
 
 /*
@@ -91,7 +87,8 @@ static off_t consumed_bytes;
 static unsigned deepest_delta;
 static git_SHA_CTX input_ctx;
 static uint32_t input_crc32;
-static int input_fd, output_fd, pack_fd;
+static int input_fd, output_fd;
+static const char *curr_pack;
 
 #ifndef NO_PTHREADS
 
@@ -134,6 +131,7 @@ static inline void unlock_mutex(pthread_mutex_t *mutex)
  */
 static void init_thread(void)
 {
+	int i;
 	init_recursive_mutex(&read_mutex);
 	pthread_mutex_init(&counter_mutex, NULL);
 	pthread_mutex_init(&work_mutex, NULL);
@@ -141,11 +139,18 @@ static void init_thread(void)
 		pthread_mutex_init(&deepest_delta_mutex, NULL);
 	pthread_key_create(&key, NULL);
 	thread_data = xcalloc(nr_threads, sizeof(*thread_data));
+	for (i = 0; i < nr_threads; i++) {
+		thread_data[i].pack_fd = open(curr_pack, O_RDONLY);
+		if (thread_data[i].pack_fd == -1)
+			die_errno(_("unable to open %s"), curr_pack);
+	}
+
 	threads_active = 1;
 }
 
 static void cleanup_thread(void)
 {
+	int i;
 	if (!threads_active)
 		return;
 	threads_active = 0;
@@ -154,6 +159,8 @@ static void cleanup_thread(void)
 	pthread_mutex_destroy(&work_mutex);
 	if (show_stat)
 		pthread_mutex_destroy(&deepest_delta_mutex);
+	for (i = 0; i < nr_threads; i++)
+		close(thread_data[i].pack_fd);
 	pthread_key_delete(key);
 	free(thread_data);
 }
@@ -200,8 +207,13 @@ static unsigned check_object(struct object *obj)
 	if (!(obj->flags & FLAG_CHECKED)) {
 		unsigned long size;
 		int type = sha1_object_info(obj->sha1, &size);
-		if (type != obj->type || type <= 0)
-			die(_("object of unexpected type"));
+		if (type <= 0)
+			die(_("did not receive expected object %s"),
+			      sha1_to_hex(obj->sha1));
+		if (type != obj->type)
+			die(_("object %s: expected type %s, found %s"),
+			    sha1_to_hex(obj->sha1),
+			    typename(obj->type), typename(type));
 		obj->flags |= FLAG_CHECKED;
 		return 1;
 	}
@@ -288,13 +300,13 @@ static const char *open_pack_file(const char *pack_name)
 			output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
 		if (output_fd < 0)
 			die_errno(_("unable to create '%s'"), pack_name);
-		pack_fd = output_fd;
+		nothread_data.pack_fd = output_fd;
 	} else {
 		input_fd = open(pack_name, O_RDONLY);
 		if (input_fd < 0)
 			die_errno(_("cannot open packfile '%s'"), pack_name);
 		output_fd = -1;
-		pack_fd = input_fd;
+		nothread_data.pack_fd = input_fd;
 	}
 	git_SHA1_Init(&input_ctx);
 	return pack_name;
@@ -542,7 +554,7 @@ static void *unpack_data(struct object_entry *obj,
 
 	do {
 		ssize_t n = (len < 64*1024) ? len : 64*1024;
-		n = pread(pack_fd, inbuf, n, from);
+		n = xpread(get_thread_data()->pack_fd, inbuf, n, from);
 		if (n < 0)
 			die_errno(_("cannot pread pack file"));
 		if (!n)
@@ -1490,7 +1502,7 @@ static void show_pack_info(int stat_only)
 int cmd_index_pack(int argc, const char **argv, const char *prefix)
 {
 	int i, fix_thin_pack = 0, verify = 0, stat_only = 0;
-	const char *curr_pack, *curr_index;
+	const char *curr_index;
 	const char *index_name = NULL, *pack_name = NULL;
 	const char *keep_name = NULL, *keep_msg = NULL;
 	char *index_name_buf = NULL, *keep_name_buf = NULL;
@@ -1502,7 +1514,7 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
 	if (argc == 2 && !strcmp(argv[1], "-h"))
 		usage(index_pack_usage);
 
-	read_replace_refs = 0;
+	check_replace_refs = 0;
 
 	reset_pack_idx_option(&opts);
 	git_config(git_index_pack_config, &opts);

builtin/init-db.c

@@ -412,11 +412,9 @@ int init_db(const char *template_dir, unsigned int flags)
 	if (!(flags & INIT_DB_QUIET)) {
 		int len = strlen(git_dir);
 
-		/*
-		 * TRANSLATORS: The first '%s' is either "Reinitialized
-		 * existing" or "Initialized empty", the second " shared" or
-		 * "", and the last '%s%s' is the verbatim directory name.
-		 */
+		/* TRANSLATORS: The first '%s' is either "Reinitialized
+		   existing" or "Initialized empty", the second " shared" or
+		   "", and the last '%s%s' is the verbatim directory name. */
 		printf(_("%s%s Git repository in %s%s\n"),
 		       reinit ? _("Reinitialized existing") : _("Initialized empty"),
 		       shared_repository ? _(" shared") : "",

builtin/log.c

@@ -158,13 +158,9 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 	if (rev->show_notes)
 		init_display_notes(&rev->notes_opt);
 
-	if (rev->diffopt.pickaxe || rev->diffopt.filter)
+	if (rev->diffopt.pickaxe || rev->diffopt.filter ||
+	    DIFF_OPT_TST(&rev->diffopt, FOLLOW_RENAMES))
 		rev->always_show_header = 0;
-	if (DIFF_OPT_TST(&rev->diffopt, FOLLOW_RENAMES)) {
-		rev->always_show_header = 0;
-		if (rev->diffopt.pathspec.nr != 1)
-			usage("git logs can only follow renames on one pathname at a time");
-	}
 
 	if (source)
 		rev->show_source = 1;

builtin/ls-remote.c

@@ -22,7 +22,7 @@ static int tail_match(const char **pattern, const char *path)
 	if (snprintf(pathbuf, sizeof(pathbuf), "/%s", path) > sizeof(pathbuf))
 		return error("insanely long ref %.*s...", 20, path);
 	while ((p = *(pattern++)) != NULL) {
-		if (!fnmatch(p, pathbuf, 0))
+		if (!wildmatch(p, pathbuf, 0, NULL))
 			return 1;
 	}
 	return 0;

builtin/mailinfo.c

@@ -334,7 +334,7 @@ static int check_header(const struct strbuf *line,
 	}
 	if (starts_with(line->buf, "[PATCH]") && isspace(line->buf[7])) {
 		for (i = 0; header[i]; i++) {
-			if (!memcmp("Subject", header[i], 7)) {
+			if (!strcmp("Subject", header[i])) {
 				handle_header(&hdr_data[i], line);
 				ret = 1;
 				goto check_header_out;
@@ -929,13 +929,13 @@ static void handle_info(void)
 		else
 			continue;
 
-		if (!memcmp(header[i], "Subject", 7)) {
+		if (!strcmp(header[i], "Subject")) {
 			if (!keep_subject) {
 				cleanup_subject(hdr);
 				cleanup_space(hdr);
 			}
 			output_header_lines(fout, "Subject", hdr);
-		} else if (!memcmp(header[i], "From", 4)) {
+		} else if (!strcmp(header[i], "From")) {
 			cleanup_space(hdr);
 			handle_from(hdr);
 			fprintf(fout, "Author: %s\n", name.buf);

builtin/merge.c

@@ -220,7 +220,7 @@ static struct option builtin_merge_options[] = {
 	OPT_BOOL(0, "abort", &abort_current_merge,
 		N_("abort the current in-progress merge")),
 	OPT_SET_INT(0, "progress", &show_progress, N_("force progress reporting"), 1),
-	{ OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key id"),
+	{ OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key-id"),
 	  N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
 	OPT_BOOL(0, "overwrite-ignore", &overwrite_ignore, N_("update ignored files (default)")),
 	OPT_END()
@@ -597,6 +597,9 @@ static int git_merge_config(const char *k, const char *v, void *cb)
 	} else if (!strcmp(k, "merge.defaulttoupstream")) {
 		default_to_upstream = git_config_bool(k, v);
 		return 0;
+	} else if (!strcmp(k, "commit.gpgsign")) {
+		sign_commit = git_config_bool(k, v) ? "" : NULL;
+		return 0;
 	}
 
 	status = fmt_merge_msg_config(k, v, cb);

builtin/mktree.c

@@ -23,10 +23,7 @@ static void append_to_tree(unsigned mode, unsigned char *sha1, char *path)
 	if (strchr(path, '/'))
 		die("path %s contains slash", path);
 
-	if (alloc <= used) {
-		alloc = alloc_nr(used);
-		entries = xrealloc(entries, sizeof(*entries) * alloc);
-	}
+	ALLOC_GROW(entries, used + 1, alloc);
 	ent = entries[used++] = xmalloc(sizeof(**entries) + len + 1);
 	ent->mode = mode;
 	ent->len = len;

builtin/mv.c

@@ -162,7 +162,8 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
 					if (strncmp(path, src_w_slash, len_w_slash))
 						break;
 				}
-				free((char *)src_w_slash);
+				if (src_w_slash != src)
+					free((char *)src_w_slash);
 
 				if (last - first < 1)
 					bad = _("source directory is empty");
@@ -202,7 +203,8 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
 			}
 		} else if (cache_name_pos(src, length) < 0)
 			bad = _("not under version control");
-		else if (lstat(dst, &st) == 0) {
+		else if (lstat(dst, &st) == 0 &&
+			 (!ignore_case || strcasecmp(src, dst))) {
 			bad = _("destination exists");
 			if (force) {
 				/*

builtin/name-rev.c

@@ -87,7 +87,7 @@ static int subpath_matches(const char *path, const char *filter)
 	const char *subpath = path;
 
 	while (subpath) {
-		if (!fnmatch(filter, subpath, 0))
+		if (!wildmatch(filter, subpath, 0, NULL))
 			return subpath - path;
 		subpath = strchr(subpath, '/');
 		if (subpath)

builtin/notes.c

@@ -269,7 +269,11 @@ static int parse_reuse_arg(const struct option *opt, const char *arg, int unset)
 		die(_("Failed to resolve '%s' as a valid ref."), arg);
 	if (!(buf = read_sha1_file(object, &type, &len)) || !len) {
 		free(buf);
-		die(_("Failed to read object '%s'."), arg);;
+		die(_("Failed to read object '%s'."), arg);
+	}
+	if (type != OBJ_BLOB) {
+		free(buf);
+		die(_("Cannot read note data from non-blob object '%s'."), arg);
 	}
 	strbuf_add(&(msg->buf), buf, len);
 	free(buf);
@@ -935,7 +939,7 @@ int cmd_notes(int argc, const char **argv, const char *prefix)
 	int result;
 	const char *override_notes_ref = NULL;
 	struct option options[] = {
-		OPT_STRING(0, "ref", &override_notes_ref, N_("notes_ref"),
+		OPT_STRING(0, "ref", &override_notes_ref, N_("notes-ref"),
 			   N_("use notes from <notes_ref>")),
 		OPT_END()
 	};

builtin/pack-objects.c

@@ -14,10 +14,12 @@
 #include "diff.h"
 #include "revision.h"
 #include "list-objects.h"
+#include "pack-objects.h"
 #include "progress.h"
 #include "refs.h"
 #include "streaming.h"
 #include "thread-utils.h"
+#include "pack-bitmap.h"
 
 static const char *pack_usage[] = {
 	N_("git pack-objects --stdout [options...] [< ref-list | < object-list]"),
@@ -25,42 +27,15 @@ static const char *pack_usage[] = {
 	NULL
 };
 
-struct object_entry {
-	struct pack_idx_entry idx;
-	unsigned long size;	/* uncompressed size */
-	struct packed_git *in_pack; 	/* already in pack */
-	off_t in_pack_offset;
-	struct object_entry *delta;	/* delta base object */
-	struct object_entry *delta_child; /* deltified objects who bases me */
-	struct object_entry *delta_sibling; /* other deltified objects who
-					     * uses the same base as me
-					     */
-	void *delta_data;	/* cached delta (uncompressed) */
-	unsigned long delta_size;	/* delta data size (uncompressed) */
-	unsigned long z_delta_size;	/* delta data size (compressed) */
-	enum object_type type;
-	enum object_type in_pack_type;	/* could be delta */
-	uint32_t hash;			/* name hint hash */
-	unsigned char in_pack_header_size;
-	unsigned preferred_base:1; /*
-				    * we do not pack this, but is available
-				    * to be used as the base object to delta
-				    * objects against.
-				    */
-	unsigned no_try_delta:1;
-	unsigned tagged:1; /* near the very tip of refs */
-	unsigned filled:1; /* assigned write-order */
-};
-
 /*
- * Objects we are going to pack are collected in objects array (dynamically
- * expanded).  nr_objects & nr_alloc controls this array.  They are stored
- * in the order we see -- typically rev-list --objects order that gives us
- * nice "minimum seek" order.
+ * Objects we are going to pack are collected in the `to_pack` structure.
+ * It contains an array (dynamically expanded) of the object data, and a map
+ * that can resolve SHA1s to their position in the array.
  */
-static struct object_entry *objects;
+static struct packing_data to_pack;
+
 static struct pack_idx_entry **written_list;
-static uint32_t nr_objects, nr_alloc, nr_result, nr_written;
+static uint32_t nr_result, nr_written;
 
 static int non_empty;
 static int reuse_delta = 1, reuse_object = 1;
@@ -83,27 +58,43 @@ static struct progress *progress_state;
 static int pack_compression_level = Z_DEFAULT_COMPRESSION;
 static int pack_compression_seen;
 
+static struct packed_git *reuse_packfile;
+static uint32_t reuse_packfile_objects;
+static off_t reuse_packfile_offset;
+
+static int use_bitmap_index = 1;
+static int write_bitmap_index;
+static uint16_t write_bitmap_options;
+
 static unsigned long delta_cache_size = 0;
 static unsigned long max_delta_cache_size = 256 * 1024 * 1024;
 static unsigned long cache_max_small_delta_size = 1000;
 
 static unsigned long window_memory_limit = 0;
 
-/*
- * The object names in objects array are hashed with this hashtable,
- * to help looking up the entry by object name.
- * This hashtable is built after all the objects are seen.
- */
-static int *object_ix;
-static int object_ix_hashsz;
-static struct object_entry *locate_object_entry(const unsigned char *sha1);
-
 /*
  * stats
  */
 static uint32_t written, written_delta;
 static uint32_t reused, reused_delta;
 
+/*
+ * Indexed commits
+ */
+static struct commit **indexed_commits;
+static unsigned int indexed_commits_nr;
+static unsigned int indexed_commits_alloc;
+
+static void index_commit_for_bitmap(struct commit *commit)
+{
+	if (indexed_commits_nr >= indexed_commits_alloc) {
+		indexed_commits_alloc = (indexed_commits_alloc + 32) * 2;
+		indexed_commits = xrealloc(indexed_commits,
+			indexed_commits_alloc * sizeof(struct commit *));
+	}
+
+	indexed_commits[indexed_commits_nr++] = commit;
+}
 
 static void *get_delta(struct object_entry *entry)
 {
@@ -553,12 +544,12 @@ static int mark_tagged(const char *path, const unsigned char *sha1, int flag,
 		       void *cb_data)
 {
 	unsigned char peeled[20];
-	struct object_entry *entry = locate_object_entry(sha1);
+	struct object_entry *entry = packlist_find(&to_pack, sha1, NULL);
 
 	if (entry)
 		entry->tagged = 1;
 	if (!peel_ref(path, peeled)) {
-		entry = locate_object_entry(peeled);
+		entry = packlist_find(&to_pack, peeled, NULL);
 		if (entry)
 			entry->tagged = 1;
 	}
@@ -633,9 +624,10 @@ static struct object_entry **compute_write_order(void)
 {
 	unsigned int i, wo_end, last_untagged;
 
-	struct object_entry **wo = xmalloc(nr_objects * sizeof(*wo));
+	struct object_entry **wo = xmalloc(to_pack.nr_objects * sizeof(*wo));
+	struct object_entry *objects = to_pack.objects;
 
-	for (i = 0; i < nr_objects; i++) {
+	for (i = 0; i < to_pack.nr_objects; i++) {
 		objects[i].tagged = 0;
 		objects[i].filled = 0;
 		objects[i].delta_child = NULL;
@@ -647,7 +639,7 @@ static struct object_entry **compute_write_order(void)
 	 * Make sure delta_sibling is sorted in the original
 	 * recency order.
 	 */
-	for (i = nr_objects; i > 0;) {
+	for (i = to_pack.nr_objects; i > 0;) {
 		struct object_entry *e = &objects[--i];
 		if (!e->delta)
 			continue;
@@ -665,7 +657,7 @@ static struct object_entry **compute_write_order(void)
 	 * Give the objects in the original recency order until
 	 * we see a tagged tip.
 	 */
-	for (i = wo_end = 0; i < nr_objects; i++) {
+	for (i = wo_end = 0; i < to_pack.nr_objects; i++) {
 		if (objects[i].tagged)
 			break;
 		add_to_write_order(wo, &wo_end, &objects[i]);
@@ -675,7 +667,7 @@ static struct object_entry **compute_write_order(void)
 	/*
 	 * Then fill all the tagged tips.
 	 */
-	for (; i < nr_objects; i++) {
+	for (; i < to_pack.nr_objects; i++) {
 		if (objects[i].tagged)
 			add_to_write_order(wo, &wo_end, &objects[i]);
 	}
@@ -683,7 +675,7 @@ static struct object_entry **compute_write_order(void)
 	/*
 	 * And then all remaining commits and tags.
 	 */
-	for (i = last_untagged; i < nr_objects; i++) {
+	for (i = last_untagged; i < to_pack.nr_objects; i++) {
 		if (objects[i].type != OBJ_COMMIT &&
 		    objects[i].type != OBJ_TAG)
 			continue;
@@ -693,7 +685,7 @@ static struct object_entry **compute_write_order(void)
 	/*
 	 * And then all the trees.
 	 */
-	for (i = last_untagged; i < nr_objects; i++) {
+	for (i = last_untagged; i < to_pack.nr_objects; i++) {
 		if (objects[i].type != OBJ_TREE)
 			continue;
 		add_to_write_order(wo, &wo_end, &objects[i]);
@@ -702,17 +694,70 @@ static struct object_entry **compute_write_order(void)
 	/*
 	 * Finally all the rest in really tight order
 	 */
-	for (i = last_untagged; i < nr_objects; i++) {
+	for (i = last_untagged; i < to_pack.nr_objects; i++) {
 		if (!objects[i].filled)
 			add_family_to_write_order(wo, &wo_end, &objects[i]);
 	}
 
-	if (wo_end != nr_objects)
-		die("ordered %u objects, expected %"PRIu32, wo_end, nr_objects);
+	if (wo_end != to_pack.nr_objects)
+		die("ordered %u objects, expected %"PRIu32, wo_end, to_pack.nr_objects);
 
 	return wo;
 }
 
+static off_t write_reused_pack(struct sha1file *f)
+{
+	unsigned char buffer[8192];
+	off_t to_write, total;
+	int fd;
+
+	if (!is_pack_valid(reuse_packfile))
+		die("packfile is invalid: %s", reuse_packfile->pack_name);
+
+	fd = git_open_noatime(reuse_packfile->pack_name);
+	if (fd < 0)
+		die_errno("unable to open packfile for reuse: %s",
+			  reuse_packfile->pack_name);
+
+	if (lseek(fd, sizeof(struct pack_header), SEEK_SET) == -1)
+		die_errno("unable to seek in reused packfile");
+
+	if (reuse_packfile_offset < 0)
+		reuse_packfile_offset = reuse_packfile->pack_size - 20;
+
+	total = to_write = reuse_packfile_offset - sizeof(struct pack_header);
+
+	while (to_write) {
+		int read_pack = xread(fd, buffer, sizeof(buffer));
+
+		if (read_pack <= 0)
+			die_errno("unable to read from reused packfile");
+
+		if (read_pack > to_write)
+			read_pack = to_write;
+
+		sha1write(f, buffer, read_pack);
+		to_write -= read_pack;
+
+		/*
+		 * We don't know the actual number of objects written,
+		 * only how many bytes written, how many bytes total, and
+		 * how many objects total. So we can fake it by pretending all
+		 * objects we are writing are the same size. This gives us a
+		 * smooth progress meter, and at the end it matches the true
+		 * answer.
+		 */
+		written = reuse_packfile_objects *
+				(((double)(total - to_write)) / total);
+		display_progress(progress_state, written);
+	}
+
+	close(fd);
+	written = reuse_packfile_objects;
+	display_progress(progress_state, written);
+	return reuse_packfile_offset - sizeof(struct pack_header);
+}
+
 static void write_pack_file(void)
 {
 	uint32_t i = 0, j;
@@ -723,8 +768,8 @@ static void write_pack_file(void)
 	struct object_entry **write_order;
 
 	if (progress > pack_to_stdout)
-		progress_state = start_progress("Writing objects", nr_result);
-	written_list = xmalloc(nr_objects * sizeof(*written_list));
+		progress_state = start_progress(_("Writing objects"), nr_result);
+	written_list = xmalloc(to_pack.nr_objects * sizeof(*written_list));
 	write_order = compute_write_order();
 
 	do {
@@ -737,8 +782,17 @@ static void write_pack_file(void)
 			f = create_tmp_packfile(&pack_tmp_name);
 
 		offset = write_pack_header(f, nr_remaining);
+
+		if (reuse_packfile) {
+			off_t packfile_size;
+			assert(pack_to_stdout);
+
+			packfile_size = write_reused_pack(f);
+			offset += packfile_size;
+		}
+
 		nr_written = 0;
-		for (; i < nr_objects; i++) {
+		for (; i < to_pack.nr_objects; i++) {
 			struct object_entry *e = write_order[i];
 			if (write_one(f, e, &offset) == WRITE_ONE_BREAK)
 				break;
@@ -762,7 +816,7 @@ static void write_pack_file(void)
 
 		if (!pack_to_stdout) {
 			struct stat st;
-			char tmpname[PATH_MAX];
+			struct strbuf tmpname = STRBUF_INIT;
 
 			/*
 			 * Packs are runtime accessed in their mtime
@@ -782,16 +836,35 @@ static void write_pack_file(void)
 				utb.modtime = --last_mtime;
 				if (utime(pack_tmp_name, &utb) < 0)
 					warning("failed utime() on %s: %s",
-						tmpname, strerror(errno));
+						pack_tmp_name, strerror(errno));
 			}
 
-			/* Enough space for "-<sha-1>.pack"? */
-			if (sizeof(tmpname) <= strlen(base_name) + 50)
-				die("pack base name '%s' too long", base_name);
-			snprintf(tmpname, sizeof(tmpname), "%s-", base_name);
-			finish_tmp_packfile(tmpname, pack_tmp_name,
+			strbuf_addf(&tmpname, "%s-", base_name);
+
+			if (write_bitmap_index) {
+				bitmap_writer_set_checksum(sha1);
+				bitmap_writer_build_type_index(written_list, nr_written);
+			}
+
+			finish_tmp_packfile(&tmpname, pack_tmp_name,
 					    written_list, nr_written,
 					    &pack_idx_opts, sha1);
+
+			if (write_bitmap_index) {
+				strbuf_addf(&tmpname, "%s.bitmap", sha1_to_hex(sha1));
+
+				stop_progress(&progress_state);
+
+				bitmap_writer_show_progress(progress);
+				bitmap_writer_reuse_bitmaps(&to_pack);
+				bitmap_writer_select_commits(indexed_commits, indexed_commits_nr, -1);
+				bitmap_writer_build(&to_pack);
+				bitmap_writer_finish(written_list, nr_written,
+						     tmpname.buf, write_bitmap_options);
+				write_bitmap_index = 0;
+			}
+
+			strbuf_release(&tmpname);
 			free(pack_tmp_name);
 			puts(sha1_to_hex(sha1));
 		}
@@ -801,7 +874,7 @@ static void write_pack_file(void)
 			written_list[j]->offset = (off_t)-1;
 		}
 		nr_remaining -= nr_written;
-	} while (nr_remaining && i < nr_objects);
+	} while (nr_remaining && i < to_pack.nr_objects);
 
 	free(written_list);
 	free(write_order);
@@ -811,73 +884,6 @@ static void write_pack_file(void)
 			written, nr_result);
 }
 
-static int locate_object_entry_hash(const unsigned char *sha1)
-{
-	int i;
-	unsigned int ui;
-	memcpy(&ui, sha1, sizeof(unsigned int));
-	i = ui % object_ix_hashsz;
-	while (0 < object_ix[i]) {
-		if (!hashcmp(sha1, objects[object_ix[i] - 1].idx.sha1))
-			return i;
-		if (++i == object_ix_hashsz)
-			i = 0;
-	}
-	return -1 - i;
-}
-
-static struct object_entry *locate_object_entry(const unsigned char *sha1)
-{
-	int i;
-
-	if (!object_ix_hashsz)
-		return NULL;
-
-	i = locate_object_entry_hash(sha1);
-	if (0 <= i)
-		return &objects[object_ix[i]-1];
-	return NULL;
-}
-
-static void rehash_objects(void)
-{
-	uint32_t i;
-	struct object_entry *oe;
-
-	object_ix_hashsz = nr_objects * 3;
-	if (object_ix_hashsz < 1024)
-		object_ix_hashsz = 1024;
-	object_ix = xrealloc(object_ix, sizeof(int) * object_ix_hashsz);
-	memset(object_ix, 0, sizeof(int) * object_ix_hashsz);
-	for (i = 0, oe = objects; i < nr_objects; i++, oe++) {
-		int ix = locate_object_entry_hash(oe->idx.sha1);
-		if (0 <= ix)
-			continue;
-		ix = -1 - ix;
-		object_ix[ix] = i + 1;
-	}
-}
-
-static uint32_t name_hash(const char *name)
-{
-	uint32_t c, hash = 0;
-
-	if (!name)
-		return 0;
-
-	/*
-	 * This effectively just creates a sortable number from the
-	 * last sixteen non-whitespace characters. Last characters
-	 * count "most", so things that end in ".c" sort together.
-	 */
-	while ((c = *name++) != 0) {
-		if (isspace(c))
-			continue;
-		hash = (hash >> 2) + (c << 24);
-	}
-	return hash;
-}
-
 static void setup_delta_attr_check(struct git_attr_check *check)
 {
 	static struct git_attr *attr_delta;
@@ -900,42 +906,69 @@ static int no_try_delta(const char *path)
 	return 0;
 }
 
-static int add_object_entry(const unsigned char *sha1, enum object_type type,
-			    const char *name, int exclude)
+/*
+ * When adding an object, check whether we have already added it
+ * to our packing list. If so, we can skip. However, if we are
+ * being asked to excludei t, but the previous mention was to include
+ * it, make sure to adjust its flags and tweak our numbers accordingly.
+ *
+ * As an optimization, we pass out the index position where we would have
+ * found the item, since that saves us from having to look it up again a
+ * few lines later when we want to add the new entry.
+ */
+static int have_duplicate_entry(const unsigned char *sha1,
+				int exclude,
+				uint32_t *index_pos)
 {
 	struct object_entry *entry;
-	struct packed_git *p, *found_pack = NULL;
-	off_t found_offset = 0;
-	int ix;
-	uint32_t hash = name_hash(name);
 
-	ix = nr_objects ? locate_object_entry_hash(sha1) : -1;
-	if (ix >= 0) {
-		if (exclude) {
-			entry = objects + object_ix[ix] - 1;
-			if (!entry->preferred_base)
-				nr_result--;
-			entry->preferred_base = 1;
-		}
+	entry = packlist_find(&to_pack, sha1, index_pos);
+	if (!entry)
 		return 0;
+
+	if (exclude) {
+		if (!entry->preferred_base)
+			nr_result--;
+		entry->preferred_base = 1;
 	}
 
+	return 1;
+}
+
+/*
+ * Check whether we want the object in the pack (e.g., we do not want
+ * objects found in non-local stores if the "--local" option was used).
+ *
+ * As a side effect of this check, we will find the packed version of this
+ * object, if any. We therefore pass out the pack information to avoid having
+ * to look it up again later.
+ */
+static int want_object_in_pack(const unsigned char *sha1,
+			       int exclude,
+			       struct packed_git **found_pack,
+			       off_t *found_offset)
+{
+	struct packed_git *p;
+
 	if (!exclude && local && has_loose_object_nonlocal(sha1))
 		return 0;
 
+	*found_pack = NULL;
+	*found_offset = 0;
+
 	for (p = packed_git; p; p = p->next) {
 		off_t offset = find_pack_entry_one(sha1, p);
 		if (offset) {
-			if (!found_pack) {
+			if (!*found_pack) {
 				if (!is_pack_valid(p)) {
 					warning("packfile %s cannot be accessed", p->pack_name);
 					continue;
 				}
-				found_offset = offset;
-				found_pack = p;
+				*found_offset = offset;
+				*found_pack = p;
 			}
 			if (exclude)
-				break;
+				return 1;
 			if (incremental)
 				return 0;
 			if (local && !p->pack_local)
@@ -945,14 +978,21 @@ static int add_object_entry(const unsigned char *sha1, enum object_type type,
 		}
 	}
 
-	if (nr_objects >= nr_alloc) {
-		nr_alloc = (nr_alloc  + 1024) * 3 / 2;
-		objects = xrealloc(objects, nr_alloc * sizeof(*entry));
-	}
+	return 1;
+}
 
-	entry = objects + nr_objects++;
-	memset(entry, 0, sizeof(*entry));
-	hashcpy(entry->idx.sha1, sha1);
+static void create_object_entry(const unsigned char *sha1,
+				enum object_type type,
+				uint32_t hash,
+				int exclude,
+				int no_try_delta,
+				uint32_t index_pos,
+				struct packed_git *found_pack,
+				off_t found_offset)
+{
+	struct object_entry *entry;
+
+	entry = packlist_alloc(&to_pack, sha1, index_pos);
 	entry->hash = hash;
 	if (type)
 		entry->type = type;
@@ -965,16 +1005,53 @@ static int add_object_entry(const unsigned char *sha1, enum object_type type,
 		entry->in_pack_offset = found_offset;
 	}
 
-	if (object_ix_hashsz * 3 <= nr_objects * 4)
-		rehash_objects();
-	else
-		object_ix[-1 - ix] = nr_objects;
+	entry->no_try_delta = no_try_delta;
+}
 
-	display_progress(progress_state, nr_objects);
+static const char no_closure_warning[] = N_(
+"disabling bitmap writing, as some objects are not being packed"
+);
 
-	if (name && no_try_delta(name))
-		entry->no_try_delta = 1;
+static int add_object_entry(const unsigned char *sha1, enum object_type type,
+			    const char *name, int exclude)
+{
+	struct packed_git *found_pack;
+	off_t found_offset;
+	uint32_t index_pos;
 
+	if (have_duplicate_entry(sha1, exclude, &index_pos))
+		return 0;
+
+	if (!want_object_in_pack(sha1, exclude, &found_pack, &found_offset)) {
+		/* The pack is missing an object, so it will not have closure */
+		if (write_bitmap_index) {
+			warning(_(no_closure_warning));
+			write_bitmap_index = 0;
+		}
+		return 0;
+	}
+
+	create_object_entry(sha1, type, pack_name_hash(name),
+			    exclude, name && no_try_delta(name),
+			    index_pos, found_pack, found_offset);
+
+	display_progress(progress_state, nr_result);
+	return 1;
+}
+
+static int add_object_entry_from_bitmap(const unsigned char *sha1,
+					enum object_type type,
+					int flags, uint32_t name_hash,
+					struct packed_git *pack, off_t offset)
+{
+	uint32_t index_pos;
+
+	if (have_duplicate_entry(sha1, 0, &index_pos))
+		return 0;
+
+	create_object_entry(sha1, type, name_hash, 0, 0, index_pos, pack, offset);
+
+	display_progress(progress_state, nr_result);
 	return 1;
 }
 
@@ -1156,12 +1233,9 @@ static int check_pbase_path(unsigned hash)
 	if (0 <= pos)
 		return 1;
 	pos = -pos - 1;
-	if (done_pbase_paths_alloc <= done_pbase_paths_num) {
-		done_pbase_paths_alloc = alloc_nr(done_pbase_paths_alloc);
-		done_pbase_paths = xrealloc(done_pbase_paths,
-					    done_pbase_paths_alloc *
-					    sizeof(unsigned));
-	}
+	ALLOC_GROW(done_pbase_paths,
+		   done_pbase_paths_num + 1,
+		   done_pbase_paths_alloc);
 	done_pbase_paths_num++;
 	if (pos < done_pbase_paths_num)
 		memmove(done_pbase_paths + pos + 1,
@@ -1175,7 +1249,7 @@ static void add_preferred_base_object(const char *name)
 {
 	struct pbase_tree *it;
 	int cmplen;
-	unsigned hash = name_hash(name);
+	unsigned hash = pack_name_hash(name);
 
 	if (!num_preferred_base || check_pbase_path(hash))
 		return;
@@ -1327,7 +1401,7 @@ static void check_object(struct object_entry *entry)
 			break;
 		}
 
-		if (base_ref && (base_entry = locate_object_entry(base_ref))) {
+		if (base_ref && (base_entry = packlist_find(&to_pack, base_ref, NULL))) {
 			/*
 			 * If base_ref was set above that means we wish to
 			 * reuse delta data, and we even found that base
@@ -1401,12 +1475,12 @@ static void get_object_details(void)
 	uint32_t i;
 	struct object_entry **sorted_by_offset;
 
-	sorted_by_offset = xcalloc(nr_objects, sizeof(struct object_entry *));
-	for (i = 0; i < nr_objects; i++)
-		sorted_by_offset[i] = objects + i;
-	qsort(sorted_by_offset, nr_objects, sizeof(*sorted_by_offset), pack_offset_sort);
+	sorted_by_offset = xcalloc(to_pack.nr_objects, sizeof(struct object_entry *));
+	for (i = 0; i < to_pack.nr_objects; i++)
+		sorted_by_offset[i] = to_pack.objects + i;
+	qsort(sorted_by_offset, to_pack.nr_objects, sizeof(*sorted_by_offset), pack_offset_sort);
 
-	for (i = 0; i < nr_objects; i++) {
+	for (i = 0; i < to_pack.nr_objects; i++) {
 		struct object_entry *entry = sorted_by_offset[i];
 		check_object(entry);
 		if (big_file_threshold < entry->size)
@@ -2032,7 +2106,7 @@ static int add_ref_tag(const char *path, const unsigned char *sha1, int flag, vo
 
 	if (starts_with(path, "refs/tags/") && /* is a tag? */
 	    !peel_ref(path, peeled)        && /* peelable? */
-	    locate_object_entry(peeled))      /* object packed? */
+	    packlist_find(&to_pack, peeled, NULL))      /* object packed? */
 		add_object_entry(sha1, OBJ_TAG, NULL, 0);
 	return 0;
 }
@@ -2055,14 +2129,14 @@ static void prepare_pack(int window, int depth)
 	if (!pack_to_stdout)
 		do_check_packed_object_crc = 1;
 
-	if (!nr_objects || !window || !depth)
+	if (!to_pack.nr_objects || !window || !depth)
 		return;
 
-	delta_list = xmalloc(nr_objects * sizeof(*delta_list));
+	delta_list = xmalloc(to_pack.nr_objects * sizeof(*delta_list));
 	nr_deltas = n = 0;
 
-	for (i = 0; i < nr_objects; i++) {
-		struct object_entry *entry = objects + i;
+	for (i = 0; i < to_pack.nr_objects; i++) {
+		struct object_entry *entry = to_pack.objects + i;
 
 		if (entry->delta)
 			/* This happens if we decided to reuse existing
@@ -2097,7 +2171,7 @@ static void prepare_pack(int window, int depth)
 	if (nr_deltas && n > 1) {
 		unsigned nr_done = 0;
 		if (progress)
-			progress_state = start_progress("Compressing objects",
+			progress_state = start_progress(_("Compressing objects"),
 							nr_deltas);
 		qsort(delta_list, n, sizeof(*delta_list), type_size_sort);
 		ll_find_deltas(delta_list, n, window+1, depth, &nr_done);
@@ -2140,6 +2214,20 @@ static int git_pack_config(const char *k, const char *v, void *cb)
 		cache_max_small_delta_size = git_config_int(k, v);
 		return 0;
 	}
+	if (!strcmp(k, "pack.writebitmaps")) {
+		write_bitmap_index = git_config_bool(k, v);
+		return 0;
+	}
+	if (!strcmp(k, "pack.writebitmaphashcache")) {
+		if (git_config_bool(k, v))
+			write_bitmap_options |= BITMAP_OPT_HASH_CACHE;
+		else
+			write_bitmap_options &= ~BITMAP_OPT_HASH_CACHE;
+	}
+	if (!strcmp(k, "pack.usebitmaps")) {
+		use_bitmap_index = git_config_bool(k, v);
+		return 0;
+	}
 	if (!strcmp(k, "pack.threads")) {
 		delta_search_threads = git_config_int(k, v);
 		if (delta_search_threads < 0)
@@ -2198,6 +2286,9 @@ static void show_commit(struct commit *commit, void *data)
 {
 	add_object_entry(commit->object.sha1, OBJ_COMMIT, NULL, 0);
 	commit->object.flags |= OBJECT_ADDED;
+
+	if (write_bitmap_index)
+		index_commit_for_bitmap(commit);
 }
 
 static void show_object(struct object *obj,
@@ -2340,7 +2431,7 @@ static void loosen_unused_packed_objects(struct rev_info *revs)
 
 		for (i = 0; i < p->num_objects; i++) {
 			sha1 = nth_packed_object_sha1(p, i);
-			if (!locate_object_entry(sha1) &&
+			if (!packlist_find(&to_pack, sha1, NULL) &&
 				!has_sha1_pack_kept_or_nonlocal(sha1))
 				if (force_object_loose(sha1, p->mtime))
 					die("unable to force loose object");
@@ -2348,6 +2439,35 @@ static void loosen_unused_packed_objects(struct rev_info *revs)
 	}
 }
 
+/*
+ * This tracks any options which a reader of the pack might
+ * not understand, and which would therefore prevent blind reuse
+ * of what we have on disk.
+ */
+static int pack_options_allow_reuse(void)
+{
+	return allow_ofs_delta;
+}
+
+static int get_object_list_from_bitmap(struct rev_info *revs)
+{
+	if (prepare_bitmap_walk(revs) < 0)
+		return -1;
+
+	if (pack_options_allow_reuse() &&
+	    !reuse_partial_packfile_from_bitmap(
+			&reuse_packfile,
+			&reuse_packfile_objects,
+			&reuse_packfile_offset)) {
+		assert(reuse_packfile_objects);
+		nr_result += reuse_packfile_objects;
+		display_progress(progress_state, nr_result);
+	}
+
+	traverse_bitmap_commit_list(&add_object_entry_from_bitmap);
+	return 0;
+}
+
 static void get_object_list(int ac, const char **av)
 {
 	struct rev_info revs;
@@ -2358,6 +2478,9 @@ static void get_object_list(int ac, const char **av)
 	save_commit_buffer = 0;
 	setup_revisions(ac, av, &revs, NULL);
 
+	/* make sure shallows are read */
+	is_repository_shallow();
+
 	while (fgets(line, sizeof(line), stdin) != NULL) {
 		int len = strlen(line);
 		if (len && line[len - 1] == '\n')
@@ -2367,6 +2490,14 @@ static void get_object_list(int ac, const char **av)
 		if (*line == '-') {
 			if (!strcmp(line, "--not")) {
 				flags ^= UNINTERESTING;
+				write_bitmap_index = 0;
+				continue;
+			}
+			if (starts_with(line, "--shallow ")) {
+				unsigned char sha1[20];
+				if (get_sha1_hex(line + 10, sha1))
+					die("not an SHA-1 '%s'", line + 10);
+				register_shallow(sha1);
 				continue;
 			}
 			die("not a rev '%s'", line);
@@ -2375,6 +2506,9 @@ static void get_object_list(int ac, const char **av)
 			die("bad revision '%s'", line);
 	}
 
+	if (use_bitmap_index && !get_object_list_from_bitmap(&revs))
+		return;
+
 	if (prepare_revision_walk(&revs))
 		die("revision walk setup failed");
 	mark_edges_uninteresting(&revs, show_edge);
@@ -2504,10 +2638,14 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 			    N_("pack compression level")),
 		OPT_SET_INT(0, "keep-true-parents", &grafts_replace_parents,
 			    N_("do not hide commits by grafts"), 0),
+		OPT_BOOL(0, "use-bitmap-index", &use_bitmap_index,
+			 N_("use a bitmap index if available to speed up counting objects")),
+		OPT_BOOL(0, "write-bitmap-index", &write_bitmap_index,
+			 N_("write a bitmap index together with the pack index")),
 		OPT_END(),
 	};
 
-	read_replace_refs = 0;
+	check_replace_refs = 0;
 
 	reset_pack_idx_option(&pack_idx_opts);
 	git_config(git_pack_config, NULL);
@@ -2570,13 +2708,19 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 	if (keep_unreachable && unpack_unreachable)
 		die("--keep-unreachable and --unpack-unreachable are incompatible.");
 
+	if (!use_internal_rev_list || !pack_to_stdout || is_repository_shallow())
+		use_bitmap_index = 0;
+
+	if (pack_to_stdout || !rev_list_all)
+		write_bitmap_index = 0;
+
 	if (progress && all_progress_implied)
 		progress = 2;
 
 	prepare_packed_git();
 
 	if (progress)
-		progress_state = start_progress("Counting objects", 0);
+		progress_state = start_progress(_("Counting objects"), 0);
 	if (!use_internal_rev_list)
 		read_object_list_from_stdin();
 	else {

builtin/prune-packed.c

@@ -46,7 +46,7 @@ void prune_packed_objects(int opts)
 
 	strbuf_addstr(&pathname, dir);
 	if (opts & PRUNE_PACKED_VERBOSE)
-		progress = start_progress_delay("Removing duplicate objects",
+		progress = start_progress_delay(_("Removing duplicate objects"),
 			256, 95, 2);
 
 	if (pathname.len && pathname.buf[pathname.len - 1] != '/')

builtin/prune.c

@@ -150,7 +150,7 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
 
 	expire = ULONG_MAX;
 	save_commit_buffer = 0;
-	read_replace_refs = 0;
+	check_replace_refs = 0;
 	init_revisions(&revs, prefix);
 
 	argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
@@ -169,7 +169,7 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
 	if (show_progress == -1)
 		show_progress = isatty(2);
 	if (show_progress)
-		progress = start_progress_delay("Checking connectivity", 0, 0, 2);
+		progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
 
 	mark_reachable_objects(&revs, 1, progress);
 	stop_progress(&progress);

builtin/push.c

@@ -26,7 +26,6 @@ static struct push_cas_option cas;
 static const char **refspec;
 static int refspec_nr;
 static int refspec_alloc;
-static int default_matching_used;
 
 static void add_refspec(const char *ref)
 {
@@ -59,7 +58,7 @@ static const char *map_refspec(const char *ref,
 	}
 
 	if (push_default == PUSH_DEFAULT_UPSTREAM &&
-	    !prefixcmp(matched->name, "refs/heads/")) {
+	    starts_with(matched->name, "refs/heads/")) {
 		struct branch *branch = branch_get(matched->name + 11);
 		if (branch->merge_nr == 1 && branch->merge[0]->src) {
 			struct strbuf buf = STRBUF_INIT;
@@ -204,9 +203,9 @@ static void setup_push_current(struct remote *remote, struct branch *branch)
 }
 
 static char warn_unspecified_push_default_msg[] =
-N_("push.default is unset; its implicit value is changing in\n"
+N_("push.default is unset; its implicit value has changed in\n"
    "Git 2.0 from 'matching' to 'simple'. To squelch this message\n"
-   "and maintain the current behavior after the default changes, use:\n"
+   "and maintain the traditional behavior, use:\n"
    "\n"
    "  git config --global push.default matching\n"
    "\n"
@@ -217,7 +216,7 @@ N_("push.default is unset; its implicit value is changing in\n"
    "When push.default is set to 'matching', git will push local branches\n"
    "to the remote branches that already exist with the same name.\n"
    "\n"
-   "In Git 2.0, Git will default to the more conservative 'simple'\n"
+   "Since Git 2.0, Git defaults to the more conservative 'simple'\n"
    "behavior, which only pushes the current branch to the corresponding\n"
    "remote branch that 'git pull' uses to update the current branch.\n"
    "\n"
@@ -247,14 +246,14 @@ static void setup_default_push_refspecs(struct remote *remote)
 
 	switch (push_default) {
 	default:
-	case PUSH_DEFAULT_UNSPECIFIED:
-		default_matching_used = 1;
-		warn_unspecified_push_default_configuration();
-		/* fallthru */
 	case PUSH_DEFAULT_MATCHING:
 		add_refspec(":");
 		break;
 
+	case PUSH_DEFAULT_UNSPECIFIED:
+		warn_unspecified_push_default_configuration();
+		/* fallthru */
+
 	case PUSH_DEFAULT_SIMPLE:
 		if (triangular)
 			setup_push_current(remote, branch);
@@ -283,12 +282,6 @@ static const char message_advice_pull_before_push[] =
 	   "'git pull ...') before pushing again.\n"
 	   "See the 'Note about fast-forwards' in 'git push --help' for details.");
 
-static const char message_advice_use_upstream[] =
-	N_("Updates were rejected because a pushed branch tip is behind its remote\n"
-	   "counterpart. If you did not intend to push that branch, you may want to\n"
-	   "specify branches to push or set the 'push.default' configuration variable\n"
-	   "to 'simple', 'current' or 'upstream' to push only the current branch.");
-
 static const char message_advice_checkout_pull_push[] =
 	N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 	   "counterpart. Check out this branch and integrate the remote changes\n"
@@ -317,13 +310,6 @@ static void advise_pull_before_push(void)
 	advise(_(message_advice_pull_before_push));
 }
 
-static void advise_use_upstream(void)
-{
-	if (!advice_push_non_ff_default || !advice_push_update_rejected)
-		return;
-	advise(_(message_advice_use_upstream));
-}
-
 static void advise_checkout_pull_push(void)
 {
 	if (!advice_push_non_ff_matching || !advice_push_update_rejected)
@@ -385,10 +371,7 @@ static int push_with_options(struct transport *transport, int flags)
 	if (reject_reasons & REJECT_NON_FF_HEAD) {
 		advise_pull_before_push();
 	} else if (reject_reasons & REJECT_NON_FF_OTHER) {
-		if (default_matching_used)
-			advise_use_upstream();
-		else
-			advise_checkout_pull_push();
+		advise_checkout_pull_push();
 	} else if (reject_reasons & REJECT_ALREADY_EXISTS) {
 		advise_ref_already_exists();
 	} else if (reject_reasons & REJECT_FETCH_FIRST) {

builtin/reflog.c

@@ -561,7 +561,7 @@ static void set_reflog_expiry_param(struct cmd_reflog_expire_cb *cb, int slot, c
 		return; /* both given explicitly -- nothing to tweak */
 
 	for (ent = reflog_expire_cfg; ent; ent = ent->next) {
-		if (!fnmatch(ent->pattern, ref, 0)) {
+		if (!wildmatch(ent->pattern, ref, 0, NULL)) {
 			if (!(slot & EXPIRE_TOTAL))
 				cb->expire_total = ent->expire_total;
 			if (!(slot & EXPIRE_UNREACH))

builtin/remote.c

@@ -749,15 +749,23 @@ static int mv(int argc, const char **argv)
 
 static int remove_branches(struct string_list *branches)
 {
+	const char **branch_names;
 	int i, result = 0;
+
+	branch_names = xmalloc(branches->nr * sizeof(*branch_names));
+	for (i = 0; i < branches->nr; i++)
+		branch_names[i] = branches->items[i].string;
+	result |= repack_without_refs(branch_names, branches->nr);
+	free(branch_names);
+
 	for (i = 0; i < branches->nr; i++) {
 		struct string_list_item *item = branches->items + i;
 		const char *refname = item->string;
-		unsigned char *sha1 = item->util;
 
-		if (delete_ref(refname, sha1, 0))
+		if (delete_ref(refname, NULL, 0))
 			result |= error(_("Could not remove branch %s"), refname);
 	}
+
 	return result;
 }
 
@@ -789,10 +797,6 @@ static int rm(int argc, const char **argv)
 	known_remotes.to_delete = remote;
 	for_each_remote(add_known_remote, &known_remotes);
 
-	strbuf_addf(&buf, "remote.%s", remote->name);
-	if (git_config_rename_section(buf.buf, NULL) < 1)
-		return error(_("Could not remove config section '%s'"), buf.buf);
-
 	read_branches();
 	for (i = 0; i < branch_list.nr; i++) {
 		struct string_list_item *item = branch_list.items + i;
@@ -837,6 +841,12 @@ static int rm(int argc, const char **argv)
 	}
 	string_list_clear(&skipped, 0);
 
+	if (!result) {
+		strbuf_addf(&buf, "remote.%s", remote->name);
+		if (git_config_rename_section(buf.buf, NULL) < 1)
+			return error(_("Could not remove config section '%s'"), buf.buf);
+	}
+
 	return result;
 }
 
@@ -1303,6 +1313,8 @@ static int prune_remote(const char *remote, int dry_run)
 {
 	int result = 0, i;
 	struct ref_states states;
+	struct string_list delete_refs_list = STRING_LIST_INIT_NODUP;
+	const char **delete_refs;
 	const char *dangling_msg = dry_run
 		? _(" %s will become dangling!")
 		: _(" %s has become dangling!");
@@ -1316,11 +1328,20 @@ static int prune_remote(const char *remote, int dry_run)
 		       states.remote->url_nr
 		       ? states.remote->url[0]
 		       : _("(no URL)"));
+
+		delete_refs = xmalloc(states.stale.nr * sizeof(*delete_refs));
+		for (i = 0; i < states.stale.nr; i++)
+			delete_refs[i] = states.stale.items[i].util;
+		if (!dry_run)
+			result |= repack_without_refs(delete_refs, states.stale.nr);
+		free(delete_refs);
 	}
 
 	for (i = 0; i < states.stale.nr; i++) {
 		const char *refname = states.stale.items[i].util;
 
+		string_list_insert(&delete_refs_list, refname);
+
 		if (!dry_run)
 			result |= delete_ref(refname, NULL, 0);
 
@@ -1330,9 +1351,11 @@ static int prune_remote(const char *remote, int dry_run)
 		else
 			printf_ln(_(" * [pruned] %s"),
 			       abbrev_ref(refname, "refs/remotes/"));
-		warn_dangling_symref(stdout, dangling_msg, refname);
 	}
 
+	warn_dangling_symrefs(stdout, dangling_msg, &delete_refs_list);
+	string_list_clear(&delete_refs_list, 0);
+
 	free_remote_ref_states(&states);
 	return result;
 }

builtin/repack.c

@@ -9,6 +9,7 @@
 #include "argv-array.h"
 
 static int delta_base_offset = 1;
+static int pack_kept_objects = -1;
 static char *packdir, *packtmp;
 
 static const char *const git_repack_usage[] = {
@@ -22,6 +23,10 @@ static int repack_config(const char *var, const char *value, void *cb)
 		delta_base_offset = git_config_bool(var, value);
 		return 0;
 	}
+	if (!strcmp(var, "repack.packkeptobjects")) {
+		pack_kept_objects = git_config_bool(var, value);
+		return 0;
+	}
 	return git_default_config(var, value, cb);
 }
 
@@ -94,7 +99,7 @@ static void get_non_kept_pack_filenames(struct string_list *fname_list)
 
 static void remove_redundant_pack(const char *dir_name, const char *base_name)
 {
-	const char *exts[] = {".pack", ".idx", ".keep"};
+	const char *exts[] = {".pack", ".idx", ".keep", ".bitmap"};
 	int i;
 	struct strbuf buf = STRBUF_INIT;
 	size_t plen;
@@ -115,7 +120,14 @@ static void remove_redundant_pack(const char *dir_name, const char *base_name)
 
 int cmd_repack(int argc, const char **argv, const char *prefix)
 {
-	const char *exts[2] = {".pack", ".idx"};
+	struct {
+		const char *name;
+		unsigned optional:1;
+	} exts[] = {
+		{".pack"},
+		{".idx"},
+		{".bitmap", 1},
+	};
 	struct child_process cmd;
 	struct string_list_item *item;
 	struct argv_array cmd_args = ARGV_ARRAY_INIT;
@@ -137,6 +149,7 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 	int no_update_server_info = 0;
 	int quiet = 0;
 	int local = 0;
+	int write_bitmap = -1;
 
 	struct option builtin_repack_options[] = {
 		OPT_BIT('a', NULL, &pack_everything,
@@ -155,6 +168,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 		OPT__QUIET(&quiet, N_("be quiet")),
 		OPT_BOOL('l', "local", &local,
 				N_("pass --local to git-pack-objects")),
+		OPT_BOOL('b', "write-bitmap-index", &write_bitmap,
+				N_("write bitmap index")),
 		OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
 				N_("with -A, do not loosen objects older than this")),
 		OPT_STRING(0, "window", &window, N_("n"),
@@ -165,6 +180,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 				N_("limits the maximum delta depth")),
 		OPT_STRING(0, "max-pack-size", &max_pack_size, N_("bytes"),
 				N_("maximum size of each packfile")),
+		OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
+				N_("repack objects in packs marked with .keep")),
 		OPT_END()
 	};
 
@@ -173,6 +190,9 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 	argc = parse_options(argc, argv, prefix, builtin_repack_options,
 				git_repack_usage, 0);
 
+	if (pack_kept_objects < 0)
+		pack_kept_objects = write_bitmap;
+
 	packdir = mkpathdup("%s/pack", get_object_directory());
 	packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
 
@@ -180,7 +200,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 
 	argv_array_push(&cmd_args, "pack-objects");
 	argv_array_push(&cmd_args, "--keep-true-parents");
-	argv_array_push(&cmd_args, "--honor-pack-keep");
+	if (!pack_kept_objects)
+		argv_array_push(&cmd_args, "--honor-pack-keep");
 	argv_array_push(&cmd_args, "--non-empty");
 	argv_array_push(&cmd_args, "--all");
 	argv_array_push(&cmd_args, "--reflog");
@@ -196,6 +217,9 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 		argv_array_pushf(&cmd_args, "--no-reuse-delta");
 	if (no_reuse_object)
 		argv_array_pushf(&cmd_args, "--no-reuse-object");
+	if (write_bitmap >= 0)
+		argv_array_pushf(&cmd_args, "--%swrite-bitmap-index",
+				 write_bitmap ? "" : "no-");
 
 	if (pack_everything & ALL_INTO_ONE) {
 		get_non_kept_pack_filenames(&existing_packs);
@@ -256,17 +280,17 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 	 */
 	failed = 0;
 	for_each_string_list_item(item, &names) {
-		for (ext = 0; ext < 2; ext++) {
+		for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
 			char *fname, *fname_old;
 			fname = mkpathdup("%s/pack-%s%s", packdir,
-						item->string, exts[ext]);
+						item->string, exts[ext].name);
 			if (!file_exists(fname)) {
 				free(fname);
 				continue;
 			}
 
 			fname_old = mkpath("%s/old-%s%s", packdir,
-						item->string, exts[ext]);
+						item->string, exts[ext].name);
 			if (file_exists(fname_old))
 				if (unlink(fname_old))
 					failed = 1;
@@ -313,19 +337,23 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 
 	/* Now the ones with the same name are out of the way... */
 	for_each_string_list_item(item, &names) {
-		for (ext = 0; ext < 2; ext++) {
+		for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
 			char *fname, *fname_old;
 			struct stat statbuffer;
+			int exists = 0;
 			fname = mkpathdup("%s/pack-%s%s",
-					packdir, item->string, exts[ext]);
+					packdir, item->string, exts[ext].name);
 			fname_old = mkpathdup("%s-%s%s",
-					packtmp, item->string, exts[ext]);
+					packtmp, item->string, exts[ext].name);
 			if (!stat(fname_old, &statbuffer)) {
 				statbuffer.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
 				chmod(fname_old, statbuffer.st_mode);
+				exists = 1;
+			}
+			if (exists || !exts[ext].optional) {
+				if (rename(fname_old, fname))
+					die_errno(_("renaming '%s' failed"), fname_old);
 			}
-			if (rename(fname_old, fname))
-				die_errno(_("renaming '%s' failed"), fname_old);
 			free(fname);
 			free(fname_old);
 		}
@@ -333,12 +361,12 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
 
 	/* Remove the "old-" files */
 	for_each_string_list_item(item, &names) {
-		for (ext = 0; ext < 2; ext++) {
+		for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
 			char *fname;
 			fname = mkpath("%s/old-%s%s",
 					packdir,
 					item->string,
-					exts[ext]);
+					exts[ext].name);
 			if (remove_path(fname))
 				warning(_("removing '%s' failed"), fname);
 		}

builtin/replace.c

@@ -36,7 +36,7 @@ static int show_reference(const char *refname, const unsigned char *sha1,
 {
 	struct show_data *data = cb_data;
 
-	if (!fnmatch(data->pattern, refname, 0)) {
+	if (!wildmatch(data->pattern, refname, 0, NULL)) {
 		if (data->format == REPLACE_FORMAT_SHORT)
 			printf("%s\n", refname);
 		else if (data->format == REPLACE_FORMAT_MEDIUM)
@@ -178,7 +178,7 @@ int cmd_replace(int argc, const char **argv, const char *prefix)
 		OPT_END()
 	};
 
-	read_replace_refs = 0;
+	check_replace_refs = 0;
 
 	argc = parse_options(argc, argv, prefix, options, git_replace_usage, 0);
 

builtin/rerere.c

@@ -60,6 +60,8 @@ int cmd_rerere(int argc, const char **argv, const char *prefix)
 
 	argc = parse_options(argc, argv, prefix, options, rerere_usage, 0);
 
+	git_config(git_xmerge_config, NULL);
+
 	if (autoupdate == 1)
 		flags = RERERE_AUTOUPDATE;
 	if (autoupdate == 0)