Commit Graph

9307 Commits

Author SHA1 Message Date
0c627f5d3c diff-merges: handle imply -p on -c/--cc logic for log.c
Move logic that handles implying -p on -c/--cc from
log_setup_revisions_tweak() to diff_merges_setup_revs(), where it
belongs.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-21 13:47:31 -08:00
3b6c17b5c0 diff-merges: new function diff_merges_set_dense_combined_if_unset()
Call it where given functionality is needed instead of direct
checking/tweaking of diff merges related fields.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-21 13:47:31 -08:00
09322b1da9 diff-merges: new function diff_merges_suppress()
This function sets all the relevant flags to disabled state, so that
no code that checks only one of them get it wrong.

Then we call this new function everywhere where diff merges output
suppression is needed.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-21 13:47:31 -08:00
4f54544d73 diff-merges: rename diff_merges_default_to_enable() to match semantics
Rename diff_merges_default_to_enable() to
diff_merges_default_to_first_parent() to match its semantics.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-21 13:47:31 -08:00
7acf0d06f5 diff-merges: move checks for first_parent_only out of the module
The checks for first_parent_only don't in fact belong to this module,
as the primary purpose of this flag is history traversal limiting, so
get it out of this module and rename the

diff_merges_first_parent_defaults_to_enable()

to

diff_merges_default_to_enable()

to match new semantics.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-21 13:47:30 -08:00
18f09473bf diff-merges: rename all functions to have common prefix
Use the same "diff_merges" prefix for all the diff merges function
names.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-21 13:47:30 -08:00
a37eec6333 revision: move diff merges functions to its own diff-merges.c
Create separate diff-merges.c and diff-merges.h files, and move all
the code related to handling of diff merges there.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-21 13:47:30 -08:00
3d4fd94363 revision: provide implementation for diff merges tweaks
Use these implementations from show_setup_revisions_tweak() and
log_setup_revisions_tweak() in builtin/log.c.

This completes moving of management of diff merges parameters to a
single place, where we can finally observe them simultaneously.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-21 13:47:30 -08:00
cf76baea41 worktree: teach repair to fix multi-directional breakage
`git worktree repair` knows how to repair the two-way links between the
repository and a worktree as long as a link in one or the other
direction is sound. For instance, if a linked worktree is moved (without
using `git worktree move`), repair is possible because the worktree
still knows the location of the repository even though the repository no
longer knows where the worktree is. Similarly, if the repository is
moved, repair is possible since the repository still knows the locations
of the worktrees even though the worktrees no longer know where the
repository is.

However, if both the repository and the worktrees are moved, then links
are severed in both directions, and no repair is possible. This is the
case even when the new worktree locations are specified as arguments to
`git worktree repair`. The reason for this limitation is twofold. First,
when `repair` consults the worktree's gitfile (/path/to/worktree/.git)
to determine the corresponding <repo>/worktrees/<id>/gitdir file to fix,
<repo> is the old path to the repository, thus it is unable to fix the
`gitdir` file at its new location since it doesn't know where it is.
Second, when `repair` consults <repo>/worktrees/<id>/gitdir to find the
location of the worktree's gitfile (/path/to/worktree/.git), the path
recorded in `gitdir` is the old location of the worktree's gitfile, thus
it is unable to repair the gitfile since it doesn't know where it is.

Fix these shortcomings by teaching `repair` to attempt to infer the new
location of the <repo>/worktrees/<id>/gitdir file when the location
recorded in the worktree's gitfile has become stale but the file is
otherwise well-formed. The inference is intentionally simple-minded.
For each worktree path specified as an argument, `git worktree repair`
manually reads the ".git" gitfile at that location and, if it is
well-formed, extracts the <id>. It then searches for a corresponding
<id> in <repo>/worktrees/ and, if found, concludes that there is a
reasonable match and updates <repo>/worktrees/<id>/gitdir to point at
the specified worktree path. In order for <repo> to be known, `git
worktree repair` must be run in the main worktree or bare repository.

`git worktree repair` first attempts to repair each incoming
/path/to/worktree/.git gitfile to point at the repository, and then
attempts to repair outgoing <repo>/worktrees/<id>/gitdir files to point
at the worktrees. This sequence was chosen arbitrarily when originally
implemented since the order of fixes is immaterial as long as one side
of the two-way link between the repository and a worktree is sound.
However, for this new repair technique to work, the order must be
reversed. This is because the new inference mechanism, when it is
successful, allows the outgoing <repo>/worktrees/<id>/gitdir file to be
repaired, thus fixing one side of the two-way link. Once that side is
fixed, the other side can be fixed by the existing repair mechanism,
hence the order of repairs is now significant.

Two safeguards are employed to avoid hijacking a worktree from a
different repository if the user accidentally specifies a foreign
worktree as an argument. The first, as described above, is that it
requires an <id> match between the repository and the worktree. That
itself is not foolproof for preventing hijack, so the second safeguard
is that the inference will only kick in if the worktree's
/path/to/worktree/.git gitfile does not point at a repository.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-21 13:44:28 -08:00
3517022568 Merge branch 'ab/unreachable-break'
Code clean-up.

* ab/unreachable-break:
  style: do not "break" in switch() after "return"
2020-12-18 15:15:18 -08:00
772bdcd429 Merge branch 'js/init-defaultbranch-advice'
Our users are going to be trained to prepare for future change of
init.defaultBranch configuration variable.

* js/init-defaultbranch-advice:
  init: provide useful advice about init.defaultBranch
  get_default_branch_name(): prepare for showing some advice
  branch -m: allow renaming a yet-unborn branch
  init: document `init.defaultBranch` better
2020-12-18 15:15:17 -08:00
21127fa982 Merge branch 'tb/partial-clone-filters-fix'
Fix potential server side resource deallocation issues when
responding to a partial clone request.

* tb/partial-clone-filters-fix:
  upload-pack.c: don't free allowed_filters util pointers
  builtin/clone.c: don't ignore transport_fetch_refs() errors
2020-12-17 15:06:40 -08:00
0696232390 pack-redundant: fix crash when one packfile in repo
Command `git pack-redundant --all` will crash if there is only one
packfile in the repository.  This is because, if there is only one
packfile in local_packs, `cmp_local_packs` will do nothing and will
leave `pl->unique_objects` as uninitialized.

Also add testcases for repository with no packfile and one packfile
in t5323.

Reported-by: Daniel C. Klauer <daniel.c.klauer@web.de>
Signed-off-by: Jiang Xin <zhiyou.jx@alibaba-inc.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-16 21:21:06 -08:00
c525de335e pull: display default warning only when non-ff
There's no need to display the annoying warning on every pull... only
the ones that are not fast-forward.

The current warning tests still pass, but not because of the arguments
or the configuration, but because they are all fast-forward.

We need to test non-fast-forward situations now.

Suggestions-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-15 17:39:42 -08:00
7539fdc629 pull: correct condition to trigger non-ff advice
Refactor the advise() call that teaches users how they can choose
between merge and rebase into a helper function.  This revealed that
the caller's logic needs to be further clarified to allow future
actions (like "erroring out" instead of the current "go ahead and
merge anyway") that should happen whether the advice message is
squelched out.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-15 17:39:42 -08:00
b044db9172 pull: get rid of unnecessary global variable
It is easy enough to do, and gives a more descriptive name to the
variable that is scoped in a more focused way.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-15 17:39:17 -08:00
56f56ac50b style: do not "break" in switch() after "return"
Remove this unreachable code. It was found by SunCC, it's found by a
non-fatal warning emitted by SunCC. It's one of the things it's more
vehement about than GCC & Clang.

It complains about a lot of other similarly unreachable code, e.g. a
BUG(...) without a "return", and a "return 0" after a long if/else,
both of whom have "return" statements. Those are also genuine
redundancies to a compiler, but arguably make the code a bit easier to
read & less fragile to maintain.

These return/break cases are just unnecessary however, and as seen
here the surrounding code just did a plain "return" without a "break"
already.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-15 16:32:50 -08:00
c3b58472be pack-redundant: gauge the usage before proposing its removal
The subcommand is unusably slow and the reason why nobody reports it
as a performance bug is suspected to be the absense of users.  Let's
show a big message that asks the user to tell us that they still
care about the command when an attempt is made to run the command,
with an escape hatch to override it with a command line option.

In a few releases, we may turn it into an error and keep it for a
few more releases before finally removing it (during the whole time,
the plan to remove it would be interrupted by end user raising hand).

Reviewed-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-15 14:30:11 -08:00
278f4be806 pull: give the advice for choosing rebase/merge much later
Eventually we want to be omit the advice when we can fast-forward
in which case there is no reason to require the user to choose
between rebase or merge.

In order to do so, we need to delay giving the advice up to the
point where we can check if we can fast-forward or not.

Additionally, config_get_rebase() was probably never its true home.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-14 09:03:17 -08:00
77a7ec6329 pull: refactor fast-forward check
We would like to be able to make this check before the decision to
rebase is made in a future step.  Besides, using a separate helper
makes the code easier to follow.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-14 08:59:40 -08:00
cc0f13c57d get_default_branch_name(): prepare for showing some advice
We are about to introduce a message giving users running `git init` some
advice about `init.defaultBranch`. This will necessarily be done in
`repo_default_branch_name()`.

Not all code paths want to show that advice, though. In particular, the
`git clone` codepath _specifically_ asks for `init_db()` to be quiet,
via the `INIT_DB_QUIET` flag.

In preparation for showing users above-mentioned advice, let's change
the function signature of `get_default_branch_name()` to accept the
parameter `quiet`.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-13 15:53:50 -08:00
cfaff3aac8 branch -m: allow renaming a yet-unborn branch
In one of the next commits, we would like to give users some advice
regarding the initial branch name, and how to modify it.

To that end, it would be good if `git branch -m <name>` worked in a
freshly initialized repository without any commits. Let's make it so.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-13 15:53:50 -08:00
fac60b8925 rev-parse: add option for absolute or relative path formatting
git rev-parse has several options which print various paths.  Some of
these paths are printed relative to the current working directory, and
some are absolute.

Normally, this is not a problem, but there are times when one wants
paths entirely in one format or another.  This can be done trivially if
the paths are canonical, but canonicalizing paths is not possible on
some shell scripting environments which lack realpath(1) and also in Go,
which lacks functions that properly canonicalize paths on Windows.

To help out the scripter, let's provide an option which turns most of
the paths printed by git rev-parse to be either relative to the current
working directory or absolute and canonical.  Document which options are
affected and which are not so that users are not confused.

This approach is cleaner and tidier than providing duplicates of
existing options which are either relative or absolute.

Note that if the user needs both forms, it is possible to pass an
additional option in the middle of the command line which changes the
behavior of subsequent operations.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-12 23:35:51 -08:00
bb48056cb2 Merge branch 'tb/bugreport-no-localtime'
Use of non-reentrant localtime() has been removed.

* tb/bugreport-no-localtime:
  builtin/bugreport.c: use thread-safe localtime_r()
2020-12-08 15:11:21 -08:00
f2a75cb312 Merge branch 'rs/maintenance-run-outside-repo'
"git maintenance run/start/stop" needed to be run in a repository
to hold the lockfile they use, but didn't make sure they are
actually in a repository, which has been corrected.

* rs/maintenance-run-outside-repo:
  t7900: fix typo: "test_execpt_success"
  maintenance: fix SEGFAULT when no repository
2020-12-08 15:11:21 -08:00
5dfb976460 Merge branch 'ma/grep-init-default'
Code clean-up.

* ma/grep-init-default:
  MyFirstObjectWalk: drop `init_walken_defaults()`
  grep: copy struct in one fell swoop
  grep: use designated initializers for `grep_defaults`
  grep: don't set up a "default" repo for grep
2020-12-08 15:11:20 -08:00
01b8886a62 Merge branch 'js/trace2-session-id'
The transport layer was taught to optionally exchange the session
ID assigned by the trace2 subsystem during fetch/push transactions.

* js/trace2-session-id:
  receive-pack: log received client session ID
  send-pack: advertise session ID in capabilities
  upload-pack, serve: log received client session ID
  fetch-pack: advertise session ID in capabilities
  transport: log received server session ID
  serve: advertise session ID in v2 capabilities
  receive-pack: advertise session ID in v0 capabilities
  upload-pack: advertise session ID in v0 capabilities
  trace2: add a public function for getting the SID
  docs: new transfer.advertiseSID option
  docs: new capability to advertise session IDs
2020-12-08 15:11:20 -08:00
d702cb9e89 Merge branch 'ds/maintenance-part-3'
"git maintenance" command had trouble working in a directory whose
pathname contained an ERE metacharacter like '+'.

* ds/maintenance-part-3:
  maintenance: use 'git config --fixed-value'
2020-12-08 15:11:19 -08:00
a10e7842ab Merge branch 'ds/config-literal-value'
Various subcommands of "git config" that takes value_regex
learn the "--literal-value" option to take the value_regex option
as a literal string.

* ds/config-literal-value:
  config doc: value-pattern is not necessarily a regexp
  config: implement --fixed-value with --get*
  config: plumb --fixed-value into config API
  config: add --fixed-value option, un-implemented
  t1300: add test for --replace-all with value-pattern
  t1300: test "set all" mode with value-pattern
  config: replace 'value_regex' with 'value_pattern'
  config: convert multi_replace to flags
2020-12-08 15:11:19 -08:00
1bc550effe Merge branch 'ps/update-ref-multi-transaction'
"git update-ref --stdin" learns to take multiple transactions in a
single session.

* ps/update-ref-multi-transaction:
  update-ref: disallow "start" for ongoing transactions
  p1400: use `git-update-ref --stdin` to test multiple transactions
  update-ref: allow creation of multiple transactions
  t1400: avoid touching refs on filesystem
2020-12-08 15:11:17 -08:00
449fa5ee06 pack-bitmap-write: ignore BITMAP_FLAG_REUSE
The on-disk bitmap format has a flag to mark a bitmap to be "reused".
This is a rather curious feature, and works like this:

  - a run of pack-objects would decide to mark the last 80% of the
    bitmaps it generates with the reuse flag

  - the next time we generate bitmaps, we'd see those reuse flags from
    the last run, and mark those commits as special:

      - we'd be more likely to select those commits to get bitmaps in
        the new output

      - when generating the bitmap for a selected commit, we'd reuse the
        old bitmap as-is (rearranging the bits to match the new pack, of
        course)

However, neither of these behaviors particularly makes sense.

Just because a commit happened to be bitmapped last time does not make
it a good candidate for having a bitmap this time. In particular, we may
choose bitmaps based on how recent they are in history, or whether a ref
tip points to them, and those things will change. We're better off
re-considering fresh which commits are good candidates.

Reusing the existing bitmap _is_ a reasonable thing to do to save
computation. But only reusing exact bitmaps is a weak form of this. If
we have an old bitmap for A and now want a new bitmap for its child, we
should be able to compute that only by looking at trees and that are new
to the child. But this code would consider only exact reuse (which is
perhaps why it was eager to select those commits in the first place).

Furthermore, the recent switch to the reverse-edge algorithm for
generating bitmaps dropped this optimization entirely (and yet still
performs better).

So let's do a few cleanups:

 - drop the whole "reusing bitmaps" phase of generating bitmaps. It's
   not helping anything, and is mostly unused code (or worse, code that
   is using CPU but not doing anything useful)

 - drop the use of the on-disk reuse flag to select commits to bitmap

 - stop setting the on-disk reuse flag in bitmaps we generate (since
   nothing respects it anymore)

We will keep a few innards of the reuse code, which will help us
implement a more capable version of the "reuse" optimization:

 - simplify rebuild_existing_bitmaps() into a function that only builds
   the mapping of bits between the old and new orders, but doesn't
   actually convert any bitmaps

 - make rebuild_bitmap() public; we'll call it lazily to convert bitmaps
   as we traverse (using the mapping created above)

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-08 14:48:17 -08:00
aab179d937 builtin/clone.c: don't ignore transport_fetch_refs() errors
If 'git clone' couldn't execute 'transport_fetch_refs()' (e.g., because
of an error on the remote's side in 'git upload-pack'), then it will
silently ignore it.

Even though this has been the case at least since clone was ported to C
(way back in 8434c2f1af (Build in clone, 2008-04-27)), 'git fetch'
doesn't ignore these and reports any failures it sees.

That suggests that ignoring the return value in 'git clone' is simply an
oversight that should be corrected. That's exactly what this patch does.
(Noticing and fixing this is no coincidence, we'll want it in the next
patch in order to demonstrate a regression in 'git upload-pack' via a
'git clone'.)

There's no additional logging here, but that matches how 'git fetch'
handles the same case. An assumption there is that whichever part of
transport_fetch_refs() fails will complain loudly, so any additional
logging here is redundant.

Co-authored-by: Jeff King <peff@peff.net>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-03 12:42:29 -08:00
39d38a5c5f Merge branch 'tb/repack-simplify'
Simplify the logic to deal with a repack operation that ended up
creating the same packfile.

* tb/repack-simplify:
  builtin/repack.c: don't move existing packs out of the way
  builtin/repack.c: keep track of what pack-objects wrote
  repack: make "exts" array available outside cmd_repack()
2020-12-03 00:18:06 -08:00
c692e1b673 Merge branch 'pb/pull-rebase-recurse-submodules'
"git pull --rebase --recurse-submodules" checked for local changes
in a wrong range and failed to run correctly when it should.

* pb/pull-rebase-recurse-submodules:
  pull: check for local submodule modifications with the right range
  t5572: describe '--rebase' tests a little more
  t5572: add notes on a peculiar test
  pull --rebase: compute rebase arguments in separate function
2020-12-03 00:18:06 -08:00
ba359fd507 stash: fix stash application in sparse-checkouts
sparse-checkouts are built on the patterns in the
$GIT_DIR/info/sparse-checkout file, where commands have modified
behavior for paths that do not match those patterns.  The differences in
behavior, as far as the bugs concerned here, fall into three different
categories (with git subcommands that fall into each category listed):

  * commands that only look at files matching the patterns:
      * status
      * diff
      * clean
      * update-index
  * commands that remove files from the working tree that do not match
    the patterns, and restore files that do match them:
      * read-tree
      * switch
      * checkout
      * reset (--hard)
  * commands that omit writing files to the working tree that do not
    match the patterns, unless those files are not clean:
      * merge
      * rebase
      * cherry-pick
      * revert

There are some caveats above, e.g. a plain `git diff` ignores files
outside the sparsity patterns but will show diffs for paths outside the
sparsity patterns when revision arguments are passed.  (Technically,
diff is treating the sparse paths as matching HEAD.)  So, there is some
internal inconsistency among these commands.  There are also additional
commands that should behave differently in the face of sparse-checkouts,
as the sparse-checkout documentation alludes to, but the above is
sufficient for me to explain how `git stash` is affected.

What is relevant here is that logically 'stash' should behave like a
merge; it three-way merges the changes the user had in progress at stash
creation time, the HEAD at the time the stash was created, and the
current HEAD, in order to get the stashed changes applied to the current
branch.  However, this simplistic view doesn't quite work in practice,
because stash tweaks it a bit due to two factors: (1) flags like
--keep-index and --include-untracked (why we used two different verbs,
'keep' and 'include', is a rant for another day) modify what should be
staged at the end and include more things that should be quasi-merged,
(2) stash generally wants changes to NOT be staged.  It only provides
exceptions when (a) some of the changes had conflicts and thus we want
to use stages to denote the clean merges and higher order stages to
mark the conflicts, or (b) if there is a brand new file we don't want
it to become untracked.

stash has traditionally gotten this special behavior by first doing a
merge, and then when it's clean, applying a pipeline of commands to
modify the result.  This series of commands for
unstaging-non-newly-added-files came from the following commands:

    git diff-index --cached --name-only --diff-filter=A $CTREE >"$a"
    git read-tree --reset $CTREE
    git update-index --add --stdin <"$a"
    rm -f "$a"

Looking back at the different types of special sparsity handling listed
at the beginning of this message, you may note that we have at least one
of each type covered here: merge, diff-index, and read-tree.  The weird
mix-and-match led to 3 different bugs:

(1) If a path merged cleanly and it didn't match the sparsity patterns,
the merge backend would know to avoid writing it to the working tree and
keep the SKIP_WORKTREE bit, simply only updating it in the index.
Unfortunately, the subsequent commands would essentially undo the
changes in the index and thus simply toss the changes altogether since
there was nothing left in the working tree.  This means the stash is
only partially applied.

(2) If a path existed in the worktree before `git stash apply` despite
having the SKIP_WORKTREE bit set, then the `git read-tree --reset` would
print an error message of the form
      error: Entry 'modified' not uptodate. Cannot merge.
and cause stash to abort early.

(3) If there was a brand new file added by the stash, then the
diff-index command would save that pathname to the temporary file, the
read-tree --reset would remove it from the index, and the update-index
command would barf due to no such file being present in the working
copy; it would print a message of the form:
      error: NEWFILE: does not exist and --remove not passed
      fatal: Unable to process path NEWFILE
and then cause stash to abort early.

Basically, the whole idea of unstage-unless-brand-new requires special
care when you are dealing with a sparse-checkout.  Fix these problems
by applying the following simple rule:

  When we unstage files, if they have the SKIP_WORKTREE bit set,
  clear that bit and write the file out to the working directory.

  (*) If there's already a file present in the way, rename it first.

This fixes all three problems in t7012.13 and allows us to mark it as
passing.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-01 14:39:04 -08:00
b34ab4a43b stash: remove unnecessary process forking
When stash was converted from shell to a builtin, it merely
transliterated the forking of various git commands from shell to a C
program that would fork the same commands.  Some of those were converted
over to actual library calls, but much of the pipeline-of-commands
design still remains.  Fix some of this by replacing the portion
corresponding to

    git diff-index --cached --name-only --diff-filter=A $CTREE >"$a"
    git read-tree --reset $CTREE
    git update-index --add --stdin <"$a"
    rm -f "$a"

into a library function that does the same thing.  (The read-tree
--reset was already partially converted over to a library call, but as
an independent piece.)  Note here that this came after a merge operation
was performed.  The merge machinery always stages anything that cleanly
merges, and the above code only runs if there are no conflicts.  Its
purpose is to make it so that when there are no conflicts, all the
changes from the stash are unstaged.  However, that causes brand new
files from the stash to become untracked, so the code above first saves
those files off and then re-adds them afterwards.

We replace the whole series of commands with a simple function that will
unstage files that are not newly added.  This doesn't fix any bugs in
the usage of these commands, it simply matches the existing behavior but
makes it into a single atomic operation that we can then operate on as a
whole.  A subsequent commit will take advantage of this to fix issues
with these commands in sparse-checkouts.

This conversion incidentally fixes t3906.1, because the separate
update-index process would die with the following error messages:
    error: uninitialized_sub: is a directory - add files inside instead
    fatal: Unable to process path uninitialized_sub
The unstaging of the directory as a submodule meant it was no longer
tracked, and thus as an uninitialized directory it could not be added
back using `git update-index --add`, thus resulting in this error and
early abort.  Most of the submodule tests in 3906 continue to fail after
this change, this change was just enough to push the first of those
tests to success.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-01 14:39:04 -08:00
4f6460df55 builtin/bugreport.c: use thread-safe localtime_r()
To generate its filename, the 'git bugreport' builtin asks the system
for the current time with 'localtime()'. Since this uses a shared
buffer, it is not thread-safe.

Even though 'git bugreport' is not multi-threaded, using localtime() can
trigger some static analysis tools to complain, and a quick

    $ git grep -oh 'localtime\(_.\)\?' -- **/*.c | sort | uniq -c

shows that the only usage of the thread-unsafe 'localtime' is in a piece
of documentation.

So, convert this instance to use the thread-safe version for
consistency, and to appease some analysis tools.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-01 13:05:37 -08:00
3d8f81f21b Merge branch 'sa/credential-store-timeout'
Multiple "credential-store" backends can race to lock the same
file, causing everybody else but one to fail---reattempt locking
with some timeout to reduce the rate of the failure.

* sa/credential-store-timeout:
  crendential-store: use timeout when locking file
2020-11-30 14:49:45 -08:00
fa27e2d103 Merge branch 'km/stash-error-message-fix'
Error message fix.

* km/stash-error-message-fix:
  stash: add missing space to an error message
2020-11-30 14:49:45 -08:00
f73ee0c6be Merge branch 'mt/worktree-error-message-fix'
Fix formulation of an error message with two placeholders in "git
worktree add" subcommand.

* mt/worktree-error-message-fix:
  worktree: fix order of arguments in error message
2020-11-30 14:49:43 -08:00
1c04cdd424 Merge branch 'ab/gc-keep-base-option'
Fix an option name in "gc" documentation.

* ab/gc-keep-base-option:
  gc: rename keep_base_pack variable for --keep-largest-pack
  gc docs: change --keep-base-pack to --keep-largest-pack
2020-11-30 14:49:43 -08:00
290c94085b Merge branch 'js/pull-rebase-use-advise'
UI improvement.

* js/pull-rebase-use-advise:
  pull: colorize the hint about setting `pull.rebase`
2020-11-30 14:49:42 -08:00
e72f7defc4 maintenance: fix SEGFAULT when no repository
The "git maintenance run" and "git maintenance start/stop" commands
holds a file-based lock at the .git/maintenance.lock and
.git/schedule.lock respectively. These locks are used to ensure only
one maintenance process is executed at the time as both operations
involves writing data into the git repository.

The path to the lock file is built using
"the_repository->objects->odb->path" that results in SEGFAULT when we
have no repository available as "the_repository->objects->odb" is
set to NULL.

Let's teach maintenance command to use RUN_SETUP option that will
provide the validation and fail when running outside of a repository.
Hence fixing the SEGFAULT for all three operations and making the
behaviour consistent across all subcommands.

Setting the RUN_SETUP also provides the same protection for all
subcommands given that the "register" and "unregister" also requires to
be executed inside a repository.

Furthermore let's remove the local validation implemented by the
"register" and "unregister" as this will not be required anymore with
the new option.

Signed-off-by: Rafael Silva <rafaeloliveira.cs@gmail.com>
Reviewed-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-30 13:44:15 -08:00
2ba70a330b Merge branch 'rs/gc-sort-func-cast-fix'
Fix broken sorting of maintenance tasks.

* rs/gc-sort-func-cast-fix:
  gc: fix cast in compare_tasks_by_selection()
2020-11-25 15:24:53 -08:00
fcf26ef53a Merge branch 'jk/4gb-idx'
The code was not prepared to deal with pack .idx file that is
larger than 4GB.

* jk/4gb-idx:
  packfile: detect overflow in .idx file size checks
  block-sha1: take a size_t length parameter
  fsck: correctly compute checksums on idx files larger than 4GB
  use size_t to store pack .idx byte offsets
  compute pack .idx byte offsets using size_t
2020-11-25 15:24:52 -08:00
8f8f10ac09 Merge branch 'jx/t5411-flake-fix'
The exchange between receive-pack and proc-receive hook did not
carefully check for errors.

* jx/t5411-flake-fix:
  receive-pack: use default version 0 for proc-receive
  receive-pack: gently write messages to proc-receive
  t5411: new helper filter_out_user_friendly_and_stable_output
2020-11-25 15:24:52 -08:00
483a6d9b5d maintenance: use 'git config --fixed-value'
When a repository's leading directories contain regex metacharacters,
the config calls for 'git maintenance register' and 'git maintenance
unregister' are not careful enough. Use the new --fixed-value option
to direct the config machinery to use exact string matches. This is a
more robust option than escaping these arguments in a piecemeal fashion.

For the test, require that we are not running on Windows since the '+'
and '*' characters are not allowed on that filesystem.

Reported-by: Emily Shaffer <emilyshaffer@google.com>
Reported-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-25 15:04:55 -08:00
3f1bae1dc3 config: implement --fixed-value with --get*
The config builtin does its own regex matching of values for the --get,
--get-all, and --get-regexp modes. Plumb the existing 'flags' parameter
to the get_value() method so we can initialize the value-pattern argument
as a fixed string instead of a regex pattern.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-25 14:43:48 -08:00
c90702a1f6 config: plumb --fixed-value into config API
The git_config_set_multivar_in_file_gently() and related methods now
take a 'flags' bitfield, so add a new bit representing the --fixed-value
option from 'git config'. This alters the purpose of the value_pattern
parameter to be an exact string match. This requires some initialization
changes in git_config_set_multivar_in_file_gently() and a new strcmp()
call in the matches() method.

The new CONFIG_FLAGS_FIXED_VALUE flag is initialized in builtin/config.c
based on the --fixed-value option, and that needs to be updated in
several callers.

This patch only affects some of the modes of 'git config', and the rest
will be completed in the next change.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-25 14:43:48 -08:00
fda43942d7 config: add --fixed-value option, un-implemented
The 'git config' builtin takes a 'value-pattern' parameter for several
actions. This can cause confusion when expecting exact value matches
instead of regex matches, especially when the input string contains
metacharacters. While callers can escape the patterns themselves, it
would be more friendly to allow an argument to disable the pattern
matching in favor of an exact string match.

Add a new '--fixed-value' option that does not currently change the
behavior. The implementation will be filled in by later changes for
each appropriate action. For now, check and test that --fixed-value
will abort the command when included with an incompatible action or
without a 'value-pattern' argument.

The name '--fixed-value' was chosen over something simpler like
'--fixed' because some commands allow regular expressions on the
key in addition to the value.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-25 14:43:48 -08:00