Commit Graph

14256 Commits

Author SHA1 Message Date
6b11e3d52e git-compat-util: allow root to access both SUDO_UID and root owned
Previous changes introduced a regression which will prevent root for
accessing repositories owned by thyself if using sudo because SUDO_UID
takes precedence.

Loosen that restriction by allowing root to access repositories owned
by both uid by default and without having to add a safe.directory
exception.

A previous workaround that was documented in the tests is no longer
needed so it has been removed together with its specially crafted
prerequisite.

Helped-by: Johanness Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-17 14:03:08 -07:00
b4eda05d58 i18n: fix mismatched camelCase config variables
Some config variables are combinations of multiple words, and we
typically write them in camelCase forms in manpage and translatable
strings. It's not easy to find mismatches for these camelCase config
variables during code reviews, but occasionally they are identified
during localization translations.

To check for mismatched config variables, I introduced a new feature
in the helper program for localization[^1]. The following mismatched
config variables have been identified by running the helper program,
such as "git-po-helper check-pot".

Lowercase in manpage should use camelCase:

 * Documentation/config/http.txt: http.pinnedpubkey

Lowercase in translable strings should use camelCase:

 * builtin/fast-import.c:  pack.indexversion
 * builtin/gc.c:           gc.logexpiry
 * builtin/index-pack.c:   pack.indexversion
 * builtin/pack-objects.c: pack.indexversion
 * builtin/repack.c:       pack.writebitmaps
 * commit.c:               i18n.commitencoding
 * gpg-interface.c:        user.signingkey
 * http.c:                 http.postbuffer
 * submodule-config.c:     submodule.fetchjobs

Mismatched camelCases, choose the former:

 * Documentation/config/transfer.txt: transfer.credentialsInUrl
   remote.c:                          transfer.credentialsInURL

[^1]: https://github.com/git-l10n/git-po-helper

Signed-off-by: Jiang Xin <zhiyou.jx@alibaba-inc.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-17 10:38:26 -07:00
b81b98f818 Another batch of fixes before -rc1
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-17 10:33:42 -07:00
7f5a382aa5 Merge branch 'ab/credentials-in-url-more'
Rename fetch.credentialsInUrl to transfer.credentialsInUrl as the
single configuration variable should work both in pushing and
fetching.

* ab/credentials-in-url-more:
  transfer doc: move fetch.credentialsInUrl to "transfer" config namespace
  fetch doc: note "pushurl" caveat about "credentialsInUrl", elaborate
2022-06-17 10:33:32 -07:00
ac7667bd44 bitmap-format.txt: add information for trailing checksum
Bitmap file has a trailing checksum at the end of the file. However
there is no information in the bitmap-format documentation about it.

Add a trailer section to include the trailing checksum info in the
`Documentation/technical/bitmap-format.txt` file.

Signed-off-by: Abhradeep Chakraborty <chakrabortyabhradeep79@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-16 11:48:50 -07:00
caea900272 bitmap-format.txt: fix some formatting issues
The asciidoc generated html for `Documentation/technical/bitmap-
format.txt` is broken. This is mainly because `-` is used for nested
lists (which is not allowed in asciidoc) instead of `*`.

Fix these and also reformat it for better readability of the html page.

Signed-off-by: Abhradeep Chakraborty <chakrabortyabhradeep79@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-16 11:48:50 -07:00
accf237ab5 bitmap-format.txt: feed the file to asciidoc to generate html
Documentation/Makefile does not include bitmap-format.txt to generate
a html page using asciidoc.

Teach Documentation/Makefile to also generate a html page for
Documentation/technical/bitmap-format.txt file.

Signed-off-by: Abhradeep Chakraborty <chakrabortyabhradeep79@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-16 11:48:49 -07:00
4f6db706e6 Fixes and updates post -rc0
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-15 15:09:35 -07:00
686790f6c1 Merge branch 'fs/ssh-default-key-command-doc'
Doc update.

* fs/ssh-default-key-command-doc:
  gpg docs: explain better use of ssh.defaultKeyCommand
2022-06-15 15:09:28 -07:00
bfca631634 Merge branch 'jc/revert-show-parent-info'
"git revert" learns "--reference" option to use more human-readable
reference to the commit it reverts in the message template it
prepares for the user.

* jc/revert-show-parent-info:
  revert: --reference should apply only to 'revert', not 'cherry-pick'
  revert: optionally refer to commit in the "reference" format
2022-06-15 15:09:27 -07:00
7281c196b1 transfer doc: move fetch.credentialsInUrl to "transfer" config namespace
Rename the "fetch.credentialsInUrl" configuration variable introduced
in 6dcbdc0d66 (remote: create fetch.credentialsInUrl config,
2022-06-06) to "transfer".

There are existing exceptions, but generally speaking the
"<namespace>.<var>" configuration should only apply to command
described in the "namespace" (and its sub-commands, so e.g. "clone.*"
or "fetch.*" might also configure "git-remote-https").

But in the case of "fetch.credentialsInUrl" we've got a configuration
variable that configures the behavior of all of "clone", "push" and
"fetch", someone adjusting "fetch.*" configuration won't expect to
have the behavior of "git push" altered, especially as we have the
pre-existing "{transfer,fetch,receive}.fsckObjects", which configures
different parts of the transfer dialog.

So let's move this configuration variable to the "transfer" namespace
before it's exposed in a release. We could add all of
"{transfer,fetch,pull}.credentialsInUrl" at some other time, but once
we have "fetch" configure "pull" such an arrangement would would be a
confusing mess, as we'd at least need to have "fetch" configure
"push" (but not the other way around), or change existing behavior.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Acked-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-15 11:40:11 -07:00
4a169da280 fetch doc: note "pushurl" caveat about "credentialsInUrl", elaborate
Amend the documentation and release notes entry for the
"fetch.credentialsInUrl" feature added in 6dcbdc0d66 (remote: create
fetch.credentialsInUrl config, 2022-06-06), it currently doesn't
detect passwords in `remote.<name>.pushurl` configuration. We
shouldn't lull users into a false sense of security, so we need to
mention that prominently.

This also elaborates and clarifies the "exposes the password in
multiple ways" part of the documentation. As noted in [1] a user
unfamiliar with git's implementation won't know what to make of that
scary claim, e.g. git hypothetically have novel git-specific ways of
exposing configured credentials.

The reality is that this configuration is intended as an aid for users
who can't fully trust their OS's or system's security model, so lets
say that's what this is intended for, and mention the most common ways
passwords stored in configuration might inadvertently get exposed.

1. https://lore.kernel.org/git/220524.86ilpuvcqh.gmgdl@evledraar.gmail.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Acked-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-15 11:39:02 -07:00
8168d5e9c2 Git 2.37-rc0
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-13 15:53:44 -07:00
21bb3851ee Merge branch 'gc/document-config-worktree-scope'
Doc update.

* gc/document-config-worktree-scope:
  config: document and test the 'worktree' scope
2022-06-13 15:53:44 -07:00
11698e551c Merge branch 'ds/credentials-in-url'
The "fetch.credentialsInUrl" configuration variable controls what
happens when a URL with embedded login credential is used.

* ds/credentials-in-url:
  remote: create fetch.credentialsInUrl config
2022-06-13 15:53:42 -07:00
1971510c35 diff-index.txt: update raw output format in examples
The two examples in the doc for 'git diff-index' were not updated when
the raw output format was changed in 81e50eabf0 ([PATCH] The diff-raw
format updates., 2005-05-21) (first example) and in b6d8f309d9 ([PATCH]
diff-raw format update take #2., 2005-05-23) and 7cb6ac1e4b (diff:
diff_aligned_abbrev: remove ellipsis after abbreviated SHA-1 value,
2017-12-03) (second example).

Update the output, inventing some characters to complete the source
hash in the second example. Also correct the destination mode in the
second example, which was wrongly '100664' since the addition of the
example in c64b9b8860 (Reference documentation for the core git
commands., 2005-05-05).

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-13 11:59:16 -07:00
3b396c899f diff-format.txt: correct misleading wording
Near the end of the "Raw output format" section, an example shows the
output of 'git diff-files' for a tracked file modified on disk but not
yet added to the index. However the wording is:

    <sha1> is shown as all 0's if a file is new on the filesystem
    and it is out of sync with the index.

which is confusing since it can be understood to mean that 'file' is a
new, yet untracked file, in which case 'git diff-files' does not care
about it at all.

When this example was introduced all the way back in c64b9b8860
(Reference documentation for the core git commands., 2005-05-05), 'old'
and 'new' referred to the two entities being compared, depending on the
command being used (diff-index, diff-tree or diff-files - which at the
time were diff-cache, diff-tree and show-diff). The wording used at the
time was:

    <new-sha1> is shown as all 0's if new is a file on the
    filesystem and it is out of sync with the cache.

This section was reworked in 81e50eabf0 ([PATCH] The diff-raw
format updates., 2005-05-21) and the mention of the meaning of 'new' and
'old' was removed. Then in f73ae1fc5d (Some typos and light editing of
various manpages, 2005-10-05), the wording was changed to what it is
now.

In addition, in b6d8f309d9 ([PATCH] diff-raw format update take #2.,
2005-05-23), the section was further reworked and did not use '<sha1>'
anymore, making the example the sole user of this token.

Rework the introductory sentence of the example to instead refer to
'sha1 for "dst"', which is what the text description above it uses, and
fix the wording so that we do not mention a "new file".

While at it, also tweak the wording used in the description of the raw
format to explicitely state that all 0's are used for the destination
hash if the working tree is out of sync with the index, instead of the
more vague "look at worktree".

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-13 11:57:03 -07:00
7922a17d4d diff-format.txt: dst can be 0* SHA-1 when path is deleted, too
"dst" can legitimately be "0\{40\}" for a creation patch, e.g. when
the stat information is stale, but it falls into "look at work tree"
case.  The original description in b6d8f309 ([PATCH] diff-raw format
update take #2., 2005-05-23) forgot that deletion also makes the
"dst" 0* SHA-1.

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-13 11:23:13 -07:00
5699ec1b0a Ninth batch
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-10 15:05:15 -07:00
4da14b574f Merge branch 'ab/bug-if-bug'
A new bug() and BUG_if_bug() API is introduced to make it easier to
uniformly log "detect multiple bugs and abort in the end" pattern.

* ab/bug-if-bug:
  cache-tree.c: use bug() and BUG_if_bug()
  receive-pack: use bug() and BUG_if_bug()
  parse-options.c: use optbug() instead of BUG() "opts" check
  parse-options.c: use new bug() API for optbug()
  usage.c: add a non-fatal bug() function to go with BUG()
  common-main.c: move non-trace2 exit() behavior out of trace2.c
2022-06-10 15:04:15 -07:00
ce18a30bb7 gpg docs: explain better use of ssh.defaultKeyCommand
Using `ssh-add -L` for gpg.ssh.defaultKeyCommand is not a good
recommendation. It might switch keys depending on the order of known
keys and it only supports ssh-* and no ecdsa or other keys.
Clarify that we expect a literal key prefixed by `key::`, give valid
example use cases and refer to `user.signingKey` as the preferred
option.

Signed-off-by: Fabian Stelzer <fs@gigacodes.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-08 16:33:40 -07:00
1e59178e3f Sync with 'maint' 2022-06-08 14:29:30 -07:00
dc8c8deaa6 Prepare for 2.36.2
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-08 14:27:53 -07:00
363d54ff80 Merge branch 'ah/rebase-keep-base-fix' into maint
"git rebase --keep-base <upstream> <branch-to-rebase>" computed the
commit to rebase onto incorrectly, which has been corrected.
source: <20220421044233.894255-1-alexhenrie24@gmail.com>

* ah/rebase-keep-base-fix:
  rebase: use correct base for --keep-base when a branch is given
2022-06-08 14:27:52 -07:00
db7961e6a6 config: document and test the 'worktree' scope
Test that "git config --show-scope" shows the "worktree" scope, and add
it to the list of scopes in Documentation/git-config.txt.

"git config --help" does not need to be updated because it already
mentions "worktree".

Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-07 18:14:25 -07:00
9c897eef06 Eighth batch
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-07 14:11:05 -07:00
08baf19fa3 Merge branch 'js/scalar-diagnose'
Implementation of "scalar diagnose" subcommand.

* js/scalar-diagnose:
  scalar: teach `diagnose` to gather loose objects information
  scalar: teach `diagnose` to gather packfile info
  scalar diagnose: include disk space information
  scalar: implement `scalar diagnose`
  scalar: validate the optional enlistment argument
  archive --add-virtual-file: allow paths containing colons
  archive: optionally add "virtual" files
2022-06-07 14:10:58 -07:00
006fd83e03 Merge branch 'rs/document-archive-prefix'
The documentation on the interaction between "--add-file" and
"--prefix" options of "git archive" has been improved.

* rs/document-archive-prefix:
  archive: improve documentation of --prefix
2022-06-07 14:10:57 -07:00
6dcbdc0d66 remote: create fetch.credentialsInUrl config
Users sometimes provide a "username:password" combination in their
plaintext URLs. Since Git stores these URLs in plaintext in the
.git/config file, this is a very insecure way of storing these
credentials. Credential managers are a more secure way of storing this
information.

System administrators might want to prevent this kind of use by users on
their machines.

Create a new "fetch.credentialsInUrl" config option and teach Git to
warn or die when seeing a URL with this kind of information. The warning
anonymizes the sensitive information of the URL to be clear about the
issue.

This change currently defaults the behavior to "allow" which does
nothing with these URLs. We can consider changing this behavior to
"warn" by default if we wish. At that time, we may want to add some
advice about setting fetch.credentialsInUrl=ignore for users who still
want to follow this pattern (and not receive the warning).

An earlier version of this change injected the logic into
url_normalize() in urlmatch.c. While most code paths that parse URLs
eventually normalize the URL, that normalization does not happen early
enough in the stack to avoid attempting connections to the URL first. By
inserting a check into the remote validation, we identify the issue
before making a connection. In the old code path, this was revealed by
testing the new t5601-clone.sh test under --stress, resulting in an
instance where the return code was 13 (SIGPIPE) instead of 128 from the
die().

However, we can reuse the parsing information from url_normalize() in
order to benefit from its well-worn parsing logic. We can use the struct
url_info that is created in that method to replace the password with
"<redacted>" in our error messages. This comes with a slight downside
that the normalized URL might look slightly different from the input URL
(for instance, the normalized version adds a closing slash). This should
not hinder users figuring out what the problem is and being able to fix
the issue.

As an attempt to ensure the parsing logic did not catch any
unintentional cases, I modified this change locally to to use the "die"
option by default. Running the test suite succeeds except for the
explicit username:password URLs used in t5550-http-fetch-dumb.sh and
t5541-http-push-smart.sh. This means that all other tested URLs did not
trigger this logic.

The tests show that the proper error messages appear (or do not
appear), but also count the number of error messages. When only warning,
each process validates the remote URL and outputs a warning. This
happens twice for clone, three times for fetch, and once for push.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-06 09:32:32 -07:00
ab336e8f1c Seventh batch
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-03 14:30:45 -07:00
a50036da1a Merge branch 'tb/cruft-packs'
A mechanism to pack unreachable objects into a "cruft pack",
instead of ejecting them into loose form to be reclaimed later, has
been introduced.

* tb/cruft-packs:
  sha1-file.c: don't freshen cruft packs
  builtin/gc.c: conditionally avoid pruning objects via loose
  builtin/repack.c: add cruft packs to MIDX during geometric repack
  builtin/repack.c: use named flags for existing_packs
  builtin/repack.c: allow configuring cruft pack generation
  builtin/repack.c: support generating a cruft pack
  builtin/pack-objects.c: --cruft with expiration
  reachable: report precise timestamps from objects in cruft packs
  reachable: add options to add_unseen_recent_objects_to_traversal
  builtin/pack-objects.c: --cruft without expiration
  builtin/pack-objects.c: return from create_object_entry()
  t/helper: add 'pack-mtimes' test-tool
  pack-mtimes: support writing pack .mtimes files
  chunk-format.h: extract oid_version()
  pack-write: pass 'struct packing_data' to 'stage_tmp_packfiles'
  pack-mtimes: support reading .mtimes files
  Documentation/technical: add cruft-packs.txt
2022-06-03 14:30:37 -07:00
83937e9592 Merge branch 'ns/batch-fsync'
Introduce a filesystem-dependent mechanism to optimize the way the
bits for many loose object files are ensured to hit the disk
platter.

* ns/batch-fsync:
  core.fsyncmethod: performance tests for batch mode
  t/perf: add iteration setup mechanism to perf-lib
  core.fsyncmethod: tests for batch mode
  test-lib-functions: add parsing helpers for ls-files and ls-tree
  core.fsync: use batch mode and sync loose objects by default on Windows
  unpack-objects: use the bulk-checkin infrastructure
  update-index: use the bulk-checkin infrastructure
  builtin/add: add ODB transaction around add_files_to_cache
  cache-tree: use ODB transaction around writing a tree
  core.fsyncmethod: batched disk flushes for loose-objects
  bulk-checkin: rebrand plug/unplug APIs as 'odb transactions'
  bulk-checkin: rename 'state' variable and separate 'plugged' boolean
2022-06-03 14:30:34 -07:00
377d347eb3 Merge branch 'en/sparse-cone-becomes-default'
Deprecate non-cone mode of the sparse-checkout feature.

* en/sparse-cone-becomes-default:
  Documentation: some sparsity wording clarifications
  git-sparse-checkout.txt: mark non-cone mode as deprecated
  git-sparse-checkout.txt: flesh out pattern set sections a bit
  git-sparse-checkout.txt: add a new EXAMPLES section
  git-sparse-checkout.txt: shuffle some sections and mark as internal
  git-sparse-checkout.txt: update docs for deprecation of 'init'
  git-sparse-checkout.txt: wording updates for the cone mode default
  sparse-checkout: make --cone the default
  tests: stop assuming --no-cone is the default mode for sparse-checkout
2022-06-03 14:30:33 -07:00
0cc05b044f usage.c: add a non-fatal bug() function to go with BUG()
Add a bug() function to use in cases where we'd like to indicate a
runtime BUG(), but would like to defer the BUG() call because we're
possibly accumulating more bug() callers to exhaustively indicate what
went wrong.

We already have this sort of facility in various parts of the
codebase, just in the form of ad-hoc re-inventions of the
functionality that this new API provides. E.g. this will be used to
replace optbug() in parse-options.c, and the 'error("BUG:[...]' we do
in a loop in builtin/receive-pack.c.

Unlike the code this replaces we'll log to trace2 with this new bug()
function (as with other usage.c functions, including BUG()), we'll
also be able to avoid calls to xstrfmt() in some cases, as the bug()
function itself accepts variadic sprintf()-like arguments.

Any caller to bug() can follow up such calls with BUG_if_bug(),
which will BUG() out (i.e. abort()) if there were any preceding calls
to bug(), callers can also decide not to call BUG_if_bug() and leave
the resulting BUG() invocation until exit() time. There are currently
no bug() API users that don't call BUG_if_bug() themselves after a
for-loop, but allowing for not calling BUG_if_bug() keeps the API
flexible. As the tests and documentation here show we'll catch missing
BUG_if_bug() invocations in our exit() wrapper.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-02 12:51:35 -07:00
2668e3608e Sixth batch
Fast-tracking GitHub CI Windows build fixes.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-31 19:10:35 -07:00
1bcf4f6271 Fifth batch
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-30 23:24:12 -07:00
1fc1879839 Merge branch 'js/use-builtin-add-i'
"git add -i" was rewritten in C some time ago and has been in
testing; the reimplementation is now exposed to general public by
default.

* js/use-builtin-add-i:
  add -i: default to the built-in implementation
  t2016: require the PERL prereq only when necessary
2022-05-30 23:24:03 -07:00
60be29398a Merge branch 'cc/http-curlopt-resolve'
With the new http.curloptResolve configuration, the CURLOPT_RESOLVE
mechanism that allows cURL based applications to use pre-resolved
IP addresses for the requests is exposed to the scripts.

* cc/http-curlopt-resolve:
  http: add custom hostname to IP address resolutions
2022-05-30 23:24:02 -07:00
de1f68a968 archive --add-virtual-file: allow paths containing colons
By allowing the path to be enclosed in double-quotes, we can avoid
the limitation that paths cannot contain colons.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-30 23:07:31 -07:00
237a1d138c archive: optionally add "virtual" files
With the `--add-virtual-file=<path>:<content>` option, `git archive` now
supports use cases where relatively trivial files need to be added that
do not exist on disk.

This will allow us to generate `.zip` files with generated content,
without having to add said content to the object database and without
having to write it out to disk.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
[jc: tweaked <path> handling]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-30 23:07:22 -07:00
23f2356fd9 Merge branch 'rs/document-archive-prefix' into js/scalar-diagnose
* rs/document-archive-prefix:
  archive: improve documentation of --prefix
2022-05-28 10:38:06 -07:00
a75910602a archive: improve documentation of --prefix
Document the interaction between --add-file and --prefix by giving an
example.

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-28 10:29:40 -07:00
43966ab315 revert: optionally refer to commit in the "reference" format
A typical "git revert" commit uses the full title of the original
commit in its title, and starts its body of the message with:

    This reverts commit 8fa7f667cf61386257c00d6e954855cc3215ae91.

This does not encourage the best practice of describing not just
"what" (i.e. "Revert X" on the title says what we did) but "why"
(i.e. and it does not say why X was undesirable).

We can instead phrase this first line of the body to be more like

    This reverts commit 8fa7f667 (do this and that, 2022-04-25)

so that the title does not have to be

    Revert "do this and that"

We can instead use the title to describe "why" we are reverting the
original commit.

Introduce the "--reference" option to "git revert", and also the
revert.reference configuration variable, which defaults to false, to
tweak the title and the first line of the draft commit message for
when creating a "revert" commit.

When this option is in use, the first line of the pre-filled editor
buffer becomes a comment line that tells the user to say _why_.  If
the user exits the editor without touching this line by mistake,
what we prepare to become the first line of the body, i.e. "This
reverts commit 8fa7f667 (do this and that, 2022-04-25)", ends up to
be the title of the resulting commit.  This behaviour is designed to
help such a user to identify such a revert in "git log --oneline"
easily so that it can be further reworded with "git rebase -i" later.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-26 23:05:03 -07:00
5b92477f89 builtin/gc.c: conditionally avoid pruning objects via loose
Expose the new `git repack --cruft` mode from `git gc` via a new opt-in
flag. When invoked like `git gc --cruft`, `git gc` will avoid exploding
unreachable objects as loose ones, and instead create a cruft pack and
`.mtimes` file.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-26 15:48:26 -07:00
4571324b99 builtin/repack.c: allow configuring cruft pack generation
In servers which set the pack.window configuration to a large value, we
can wind up spending quite a lot of time finding new bases when breaking
delta chains between reachable and unreachable objects while generating
a cruft pack.

Introduce a handful of `repack.cruft*` configuration variables to
control the parameters used by pack-objects when generating a cruft
pack.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-26 15:48:26 -07:00
f9825d1cf7 builtin/repack.c: support generating a cruft pack
Expose a way to split the contents of a repository into a main and cruft
pack when doing an all-into-one repack with `git repack --cruft -d`, and
a complementary configuration variable.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-26 15:48:26 -07:00
b757353676 builtin/pack-objects.c: --cruft without expiration
Teach `pack-objects` how to generate a cruft pack when no objects are
dropped (i.e., `--cruft-expiration=never`). Later patches will teach
`pack-objects` how to generate a cruft pack that prunes objects.

When generating a cruft pack which does not prune objects, we want to
collect all unreachable objects into a single pack (noting and updating
their mtimes as we accumulate them). Ordinary use will pass the result
of a `git repack -A` as a kept pack, so when this patch says "kept
pack", readers should think "reachable objects".

Generating a non-expiring cruft packs works as follows:

  - Callers provide a list of every pack they know about, and indicate
    which packs are about to be removed.

  - All packs which are going to be removed (we'll call these the
    redundant ones) are marked as kept in-core.

    Any packs the caller did not mention (but are known to the
    `pack-objects` process) are also marked as kept in-core. Packs not
    mentioned by the caller are assumed to be unknown to them, i.e.,
    they entered the repository after the caller decided which packs
    should be kept and which should be discarded.

    Since we do not want to include objects in these "unknown" packs
    (because we don't know which of their objects are or aren't
    reachable), these are also marked as kept in-core.

  - Then, we enumerate all objects in the repository, and add them to
    our packing list if they do not appear in an in-core kept pack.

This results in a new cruft pack which contains all known objects that
aren't included in the kept packs. When the kept pack is the result of
`git repack -A`, the resulting pack contains all unreachable objects.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-26 15:48:26 -07:00
94cd775a6c pack-mtimes: support reading .mtimes files
To store the individual mtimes of objects in a cruft pack, introduce a
new `.mtimes` format that can optionally accompany a single pack in the
repository.

The format is defined in Documentation/technical/pack-format.txt, and
stores a 4-byte network order timestamp for each object in name (index)
order.

This patch prepares for cruft packs by defining the `.mtimes` format,
and introducing a basic API that callers can use to read out individual
mtimes.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-26 15:48:26 -07:00
8ddf593a25 Fourth batch
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-05-26 14:51:40 -07:00
2785b71ef9 Merge branch 'ac/remote-v-with-object-list-filters'
"git remote -v" now shows the list-objects-filter used during
fetching from the remote, if available.

* ac/remote-v-with-object-list-filters:
  builtin/remote.c: teach `-v` to list filters for promisor remotes
2022-05-26 14:51:32 -07:00