Commit Graph

24516 Commits

Author SHA1 Message Date
Junio C Hamano
0aa55420ca Merge branch 'kh/format-patch-noprefix-is-boolean' into jch
The configuration variable format.noprefix did not behave as a
proper boolean variable, which has now been fixed and documented.

* kh/format-patch-noprefix-is-boolean:
  doc: diff-options.adoc: make *.noprefix split translatable
  doc: diff-options.adoc: show format.noprefix for format-patch
  format-patch: make format.noprefix a boolean
2026-03-04 10:53:13 -08:00
Junio C Hamano
dd518bc127 Merge branch 'lp/diff-stat-utf8-display-width-fix' into jch
"git log --graph --stat" did not count the display width of colored
graph part of its own output correctly, which has been corrected.

* lp/diff-stat-utf8-display-width-fix:
  t4052: test for diffstat width when prefix contains ANSI escape codes
  diff: handle ANSI escape codes in prefix when calculating diffstat width
2026-03-04 10:53:12 -08:00
Junio C Hamano
8fb476366d Merge branch 'jh/alias-i18n-fixes' (early part) into jch
* 'jh/alias-i18n-fixes' (early part):
  git, help: fix memory leaks in alias listing
  alias: treat empty subsection [alias ""] as plain [alias]
  doc: fix list continuation in alias subsection example
2026-03-04 10:53:11 -08:00
Junio C Hamano
1f9cd27af1 Merge branch 'cs/add-skip-submodule-ignore-all' into jch
"git add <submodule>" has been taught to honor
submodule.<name>.ignore that is set to "all" (and requires "git add
-f" to override it).

* cs/add-skip-submodule-ignore-all:
  Documentation: update add --force option + ignore=all config
  tests: fix existing tests when add an ignore=all submodule
  tests: t2206-add-submodule-ignored: ignore=all and add --force tests
  read-cache: submodule add need --force given ignore=all configuration
  read-cache: update add_files_to_cache take param ignored_too
2026-03-04 10:53:11 -08:00
Junio C Hamano
f1ee3dec94 Merge branch 'ps/refs-for-each' into jch
Code refactoring around refs-for-each-* API functions.

* ps/refs-for-each:
  refs: replace `refs_for_each_fullref_in()`
  refs: replace `refs_for_each_namespaced_ref()`
  refs: replace `refs_for_each_glob_ref()`
  refs: replace `refs_for_each_glob_ref_in()`
  refs: replace `refs_for_each_rawref_in()`
  refs: replace `refs_for_each_rawref()`
  refs: replace `refs_for_each_ref_in()`
  refs: improve verification for-each-ref options
  refs: generalize `refs_for_each_fullref_in_prefixes()`
  refs: generalize `refs_for_each_namespaced_ref()`
  refs: speed up `refs_for_each_glob_ref_in()`
  refs: introduce `refs_for_each_ref_ext`
  refs: rename `each_ref_fn`
  refs: rename `do_for_each_ref_flags`
  refs: move `do_for_each_ref_flags` further up
  refs: move `refs_head_ref_namespaced()`
  refs: remove unused `refs_for_each_include_root_ref()`
2026-03-04 10:53:11 -08:00
Junio C Hamano
d77dcac943 Merge branch 'ps/fsck-stream-from-the-right-object-instance' into jch
"fsck" iterates over packfiles and its access to pack data caused
the list to be permuted, which caused it to loop forever; the code
to access pack data by "fsck" has been updated to avoid this.

* ps/fsck-stream-from-the-right-object-instance:
  pack-check: fix verification of large objects
  packfile: expose function to read object stream for an offset
  object-file: adapt `stream_object_signature()` to take a stream
  t/helper: improve "genrandom" test helper
2026-03-04 10:53:10 -08:00
Junio C Hamano
d94048ebb2 Merge branch 'ar/config-hooks' (early part) into jch
* 'ar/config-hooks' (early part):
  hook: add -z option to "git hook list"
  hook: allow out-of-repo 'git hook' invocations
  hook: allow event = "" to overwrite previous values
  hook: allow disabling config hooks
  hook: include hooks from the config
  hook: add "git hook list" command
  hook: run a list of hooks to prepare for multihook support
  hook: add internal state alloc/free callbacks
2026-03-04 10:53:10 -08:00
Junio C Hamano
58764c63e6 Merge branch 'pt/t7527-flake-workaround' into jch
Test fixup.

* pt/t7527-flake-workaround:
  t7527: fix flaky fsmonitor event tests with retry logic
2026-03-04 10:53:09 -08:00
Junio C Hamano
e6708b4661 Merge branch 'hn/status-compare-with-push' (early part) into jch
* 'hn/status-compare-with-push' (early part):
  status: add status.compareBranches config for multiple branch comparisons
  refactor format_branch_comparison in preparation
2026-03-04 10:53:08 -08:00
Junio C Hamano
6a2c5e269b Merge branch 'ar/run-command-hook-take-2' into jch
Use the hook API to replace ad-hoc invocation of hook scripts via
the run_command() API.

* ar/run-command-hook-take-2:
  builtin/receive-pack: avoid spinning no-op sideband async threads
  receive-pack: convert receive hooks to hook API
  receive-pack: convert update hooks to new API
  run-command: poll child input in addition to output
  hook: add jobs option
  reference-transaction: use hook API instead of run-command
  transport: convert pre-push to hook API
  hook: allow separate std[out|err] streams
  hook: convert 'post-rewrite' hook in sequencer.c to hook API
  hook: provide stdin via callback
  run-command: add stdin callback for parallelization
  run-command: add helper for pp child states
  t1800: add hook output stream tests
2026-03-04 10:53:08 -08:00
Junio C Hamano
a31d4f1860 Merge branch 'ds/config-list-with-type'
"git config list" is taught to show the values interpreted for
specific type with "--type=<X>" option.

* ds/config-list-with-type:
  config: use an enum for type
  config: restructure format_config()
  config: format colors quietly
  color: add color_parse_quietly()
  config: format expiry dates quietly
  config: format paths gently
  config: format bools or strings in helper
  config: format bools or ints gently
  config: format bools gently
  config: format int64s gently
  config: make 'git config list --type=<X>' work
  config: add 'gently' parameter to format_config()
  config: move show_all_config()
2026-03-04 10:53:02 -08:00
Junio C Hamano
34af1d6e87 Merge branch 'lo/repo-leftover-bits'
Clean-up the code around "git repo info" command.

* lo/repo-leftover-bits:
  Documentation/git-repo: capitalize format descriptions
  Documentation/git-repo: replace 'NUL' with '_NUL_'
  t1901: adjust nul format output instead of expected value
  t1900: rename t1900-repo to t1900-repo-info
  repo: rename struct field to repo_info_field
  repo: replace get_value_fn_for_key by get_repo_info_field
  repo: rename repo_info_fields to repo_info_field
  CodingGuidelines: instruct to name arrays in singular
2026-03-04 10:53:01 -08:00
Junio C Hamano
50d7425767 Merge branch 'ps/maintenance-geometric-default'
"git maintenance" starts using the "geometric" strategy by default.

* ps/maintenance-geometric-default:
  builtin/maintenance: use "geometric" strategy by default
  t7900: prepare for switch of the default strategy
  t6500: explicitly use "gc" strategy
  t5510: explicitly use "gc" strategy
  t5400: explicitly use "gc" strategy
  t34xx: don't expire reflogs where it matters
  t: disable maintenance where we verify object database structure
  t: fix races caused by background maintenance
2026-03-04 10:53:01 -08:00
Junio C Hamano
1ebfc21713 Merge branch 'jr/apply-directory-normalize'
"git apply --directory=./un/../normalized/path" now normalizes the
given path before using it.

* jr/apply-directory-normalize:
  apply: normalize path in --directory argument
2026-03-04 10:53:01 -08:00
Junio C Hamano
7b7d67104e Merge branch 'pw/no-more-NULL-means-current-worktree'
API clean-up for the worktree subsystem.

* pw/no-more-NULL-means-current-worktree:
  path: remove repository argument from worktree_git_path()
  wt-status: avoid passing NULL worktree
2026-03-04 10:53:00 -08:00
Junio C Hamano
fa383b96c7 Merge branch 'sp/shallow-deepen-relative-fix'
"git fetch --deepen" that tries to go beyond merged branch used to
get confused where the updated shallow points are, which has been
corrected.

* sp/shallow-deepen-relative-fix:
  shallow: handling fetch relative-deepen
  shallow: free local object_array allocations
2026-03-04 10:52:59 -08:00
Junio C Hamano
1d0a2acb78 Merge branch 'kn/ref-location'
Allow the directory in which reference backends store their data to
be specified.

* kn/ref-location:
  refs: add GIT_REFERENCE_BACKEND to specify reference backend
  refs: allow reference location in refstorage config
  refs: receive and use the reference storage payload
  refs: move out stub modification to generic layer
  refs: extract out `refs_create_refdir_stubs()`
  setup: don't modify repo in `create_reference_database()`
2026-03-04 10:52:59 -08:00
Junio C Hamano
e924432393 Merge branch 'hy/diff-lazy-fetch-with-break-fix'
A prefetch call can be triggered to access a stale diff_queue entry
after diffcore-break breaks a filepair into two and freed the
original entry that is no longer used, leading to a segfault, which
has been corrected.

* hy/diff-lazy-fetch-with-break-fix:
  diffcore-break: avoid segfault with freed entries
2026-03-03 11:08:13 -08:00
Junio C Hamano
a751e79aca Merge branch 'aa/add-p-no-auto-advance'
"git add -p" learned a new mode that allows the user to revisit a
file that was already dealt with.

* aa/add-p-no-auto-advance:
  add-patch: allow interfile navigation when selecting hunks
  add-patch: allow all-or-none application of patches
  add-patch: modify patch_update_file() signature
  interactive -p: add new `--auto-advance` flag
2026-03-03 11:08:13 -08:00
Junio C Hamano
f19f1b6cf3 Merge branch 'lg/t2004-test-path-is-helpers'
Test code clean-up.

* lg/t2004-test-path-is-helpers:
  t2004: use test_path_is_file instead of test -f
2026-03-03 11:08:13 -08:00
Junio C Hamano
02c31a8ddc Merge branch 'ag/http-netrc-tests'
Additional tests were introduced to see the interaction with netrc
auth with auth failure on the http transport.

* ag/http-netrc-tests:
  t5550: add netrc tests for http 401/403
2026-03-02 17:06:51 -08:00
Junio C Hamano
e417bf2996 Merge branch 'ap/use-test-seq-f-more'
Test clean-up.

* ap/use-test-seq-f-more:
  t: use test_seq -f and pipes in a few more places
2026-02-27 15:11:55 -08:00
Junio C Hamano
d64a20a1b1 Merge branch 'mf/format-patch-honor-from-for-cover-letter'
"git format-patch --from=<me>" did not honor the command line
option when writing out the cover letter, which has been corrected.

* mf/format-patch-honor-from-for-cover-letter:
  format-patch: fix From header in cover letter
2026-02-27 15:11:54 -08:00
Junio C Hamano
c0d0b8daed Merge branch 'jh/alias-i18n'
Extend the alias configuration syntax to allow aliases using
characters outside ASCII alphanumeric (plus '-').

* jh/alias-i18n:
  completion: fix zsh alias listing for subsection aliases
  alias: support non-alphanumeric names via subsection syntax
  alias: prepare for subsection aliases
  help: use list_aliases() for alias listing
2026-02-27 15:11:53 -08:00
Junio C Hamano
ac78c5804e Merge branch 'ps/tests-wo-iconv-fixes'
Some tests assumed "iconv" is available without honoring ICONV
prerequisite, which has been corrected.

* ps/tests-wo-iconv-fixes:
  t6006: don't use iconv(1) without ICONV prereq
  t5550: add ICONV prereq to tests that use "$HTTPD_URL/error"
  t4205: improve handling of ICONV prerequisite
  t40xx: don't use iconv(1) without ICONV prereq
  t: don't set ICONV prereq when iconv(1) is missing
2026-02-27 15:11:53 -08:00
Junio C Hamano
a62d0da86a Merge branch 'ps/ci-gitlab-msvc-updates'
CI update.

* ps/ci-gitlab-msvc-updates:
  gitlab-ci: handle failed tests on MSVC+Meson job
  gitlab-ci: use "run-test-slice-meson.sh"
  ci: make test slicing consistent across Meson/Make
  github: fix Meson tests not executing at all
  meson: fix MERGE_TOOL_DIR with "--no-bin-wrappers"
  ci: don't skip smallest test slice in GitLab
  ci: handle failures of test-slice helper
2026-02-27 15:11:52 -08:00
Junio C Hamano
0f0a57e1e3 Merge branch 'jc/whitespace-incomplete-line'
It does not make much sense to apply the "incomplete-line"
whitespace rule to symbolic links, whose contents almost always
lack the final newline.  "git apply" and "git diff" are now taught
to exclude them for a change to symbolic links.

* jc/whitespace-incomplete-line:
  whitespace: symbolic links usually lack LF at the end
2026-02-27 15:11:52 -08:00
Junio C Hamano
c33b464dfd Merge branch 'jc/checkout-switch-restore'
"git switch <name>", in an attempt to create a local branch <name>
after a remote tracking branch of the same name gave an advise
message to disambiguate using "git checkout", which has been
updated to use "git switch".

* jc/checkout-switch-restore:
  checkout: tell "parse_remote_branch" which command is calling it
  checkout: pass program-readable token to unified "main"
2026-02-27 15:11:51 -08:00
Junio C Hamano
bb9c781f4f Merge branch 'ps/history-ergonomics-updates'
UI improvements for "git history reword".

* ps/history-ergonomics-updates:
  Documentation/git-history: document default for "--update-refs="
  builtin/history: rename "--ref-action=" to "--update-refs="
  builtin/history: replace "--ref-action=print" with "--dry-run"
  builtin/history: check for merges before asking for user input
  builtin/history: perform revwalk checks before asking for user input
2026-02-27 15:11:50 -08:00
Junio C Hamano
aa95f87c74 Merge branch 'ps/for-each-ref-in-fixes'
A handful of places used refs_for_each_ref_in() API incorrectly,
which has been corrected.

* ps/for-each-ref-in-fixes:
  bisect: simplify string_list memory handling
  bisect: fix misuse of `refs_for_each_ref_in()`
  pack-bitmap: fix bug with exact ref match in "pack.preferBitmapTips"
  pack-bitmap: deduplicate logic to iterate over preferred bitmap tips
2026-02-27 15:11:50 -08:00
Junio C Hamano
341be27dfe Merge branch 'lo/repo-info-keys'
"git repo info" learns "--keys" action to list known keys.

* lo/repo-info-keys:
  repo: add new flag --keys to git-repo-info
  repo: rename the output format "keyvalue" to "lines"
2026-02-27 15:11:49 -08:00
LorenzoPegorari
064b869efc t4052: test for diffstat width when prefix contains ANSI escape codes
Add test checking the calculation of the diffstat display width when the
`line_prefix`, which is text that goes before the diffstat, contains
ANSI escape codes.

This situation happens, for example, when `git log --stat --graph` is
executed:
* `--stat` will create a diffstat for each commit
* `--graph` will stuff `line_prefix` with the graph portion of the log,
  which contains ANSI escape codes to color the text

Signed-off-by: LorenzoPegorari <lorenzo.pegorari2002@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-27 13:59:22 -08:00
Jonatan Holmgren
6589294375 alias: treat empty subsection [alias ""] as plain [alias]
When git-config stores a key of the form alias..name, it records
it under an empty subsection ([alias ""]). The new subsection-aware
alias lookup would see a non-NULL but zero-length subsection and
fall into the subsection code path, where it required a "command"
key and thus silently ignored the entry.

Normalize an empty subsection to NULL before any further processing
so that entries stored this way continue to work as plain
case-insensitive aliases, matching the pre-subsection behaviour.

Users who relied on alias..name to create an alias literally named
".name" may want to migrate to subsection syntax, which looks less confusing:

    [alias ".name"]
        command = <value>

Add tests covering both the empty-subsection compatibility case and
the leading-dot alias via the new syntax.

Signed-off-by: Jonatan Holmgren <jonatan@jontes.page>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-26 13:06:49 -08:00
Harald Nordgren
3ea95ac9c5 status: add status.compareBranches config for multiple branch comparisons
Add a new configuration variable status.compareBranches that allows
users to specify a space-separated list of branch comparisons in
git status output.

Supported values:
- @{upstream} for the current branch's upstream tracking branch
- @{push} for the current branch's push destination

Any other value is ignored and a warning is shown.

When not configured, the default behavior is equivalent to setting
`status.compareBranches = @{upstream}`, preserving backward
compatibility.

The advice messages shown are context-aware:
- "git pull" advice is shown only when comparing against @{upstream}
- "git push" advice is shown only when comparing against @{push}
- Divergence advice is shown for upstream branch comparisons

This is useful for triangular workflows where the upstream tracking
branch differs from the push destination, allowing users to see their
status relative to both branches at once.

Example configuration:
    [status]
        compareBranches = @{upstream} @{push}

Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-26 07:25:48 -08:00
Junio C Hamano
422cae6687 Merge branch 'mc/tr2-process-ancestry-cleanup'
Add process ancestry data to trace2 on macOS to match what we
already do on Linux and Windows.  Also adjust the way Windows
implementation reports this information to match the other two.

* mc/tr2-process-ancestry-cleanup:
  t0213: add trace2 cmd_ancestry tests
  test-tool: extend trace2 helper with 400ancestry
  trace2: emit cmd_ancestry data for Windows
  trace2: refactor Windows process ancestry trace2 event
  build: include procinfo.c impl for macOS
  trace2: add macOS process ancestry tracing
2026-02-25 11:54:18 -08:00
Junio C Hamano
b1f4b5888b Merge branch 'ps/pack-concat-wo-backfill'
"git pack-objects --stdin-packs" with "--exclude-promisor-objects"
fetched objects that are promised, which was not wanted.  This has
been fixed.

* ps/pack-concat-wo-backfill:
  builtin/pack-objects: don't fetch objects when merging packs
2026-02-25 11:54:18 -08:00
Junio C Hamano
8d15dd1ce1 Merge branch 'ds/revision-maximal-only'
"git rev-list" and friends learn "--maximal-only" to show only the
commits that are not reachable by other commits.

* ds/revision-maximal-only:
  revision: add --maximal-only option
2026-02-25 11:54:17 -08:00
Junio C Hamano
6b5ad01886 Merge branch 'cc/lop-filter-auto'
"auto filter" logic for large-object promisor remote.

* cc/lop-filter-auto:
  fetch-pack: wire up and enable auto filter logic
  promisor-remote: change promisor_remote_reply()'s signature
  promisor-remote: keep advertised filters in memory
  list-objects-filter-options: support 'auto' mode for --filter
  doc: fetch: document `--filter=<filter-spec>` option
  fetch: make filter_options local to cmd_fetch()
  clone: make filter_options local to cmd_clone()
  promisor-remote: allow a client to store fields
  promisor-remote: refactor initialising field lists
2026-02-25 11:54:17 -08:00
Lucas Seiki Oshiro
2db3d0a226 t1901: adjust nul format output instead of expected value
The test 'keyvalue and nul format', as it description says, test both
`keyvalue` and `nul` format. These formats are similar, differing only in
their field separator (= in the former, LF in the latter) and their
record separator (LF in the former, NUL in the latter). This way, both
formats can be tested using the same expected output and only replacing
the separators in one of the output formats.

However, it is not desirable to have a NUL character in the files
compared by test_cmp because, if that assetion fails, diff will consider
them binary files and won't display the differences properly.

Adjust the output of `git repo structure --format=nul` in t1901, matching the
--format=keyvalue ones. Compare this output against the same value expected
from --format=keyvalue, without using files with NUL characters in
test_cmp.

Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-25 11:47:43 -08:00
Lucas Seiki Oshiro
b62dab3b6d t1900: rename t1900-repo to t1900-repo-info
Since the commit bbb2b93348 (builtin/repo: introduce structure subcommand,
2025-10-21), t1901 specifically tests git-repo-structure. Rename
t1900-repo to t1900-repo-info to clarify that it focus solely on
git-repo-info subcommand.

Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-25 11:47:42 -08:00
Karthik Nayak
53592d68e8 refs: add GIT_REFERENCE_BACKEND to specify reference backend
Git allows setting a different object directory via
'GIT_OBJECT_DIRECTORY', but provides no equivalent for references. In
the previous commit we extended the 'extensions.refStorage' config to
also support an URI input for reference backend with location.

Let's also add a new environment variable 'GIT_REFERENCE_BACKEND' that
takes in the same input as the config variable. Having an environment
variable allows us to modify the reference backend and location on the
fly for individual Git commands.

The environment variable also allows usage of alternate reference
directories during 'git-clone(1)' and 'git-init(1)'. Add the config to
the repository when created with the environment variable set.

When initializing the repository with an alternate reference folder,
create the required stubs in the repositories $GIT_DIR. The inverse,
i.e. removal of the ref store doesn't clean up the stubs in the $GIT_DIR
since that would render it unusable. Removal of ref store is only used
when migrating between ref formats and cleanup of the $GIT_DIR doesn't
make sense in such a situation.

Helped-by: Jean-Noël Avila <jn.avila@free.fr>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-25 09:40:00 -08:00
Karthik Nayak
01dc84594e refs: allow reference location in refstorage config
The 'extensions.refStorage' config is used to specify the reference
backend for a given repository. Both the 'files' and 'reftable' backends
utilize the $GIT_DIR as the reference folder by default in
`get_main_ref_store()`.

Since the reference backends are pluggable, this means that they could
work with out-of-tree reference directories too. Extend the 'refStorage'
config to also support taking an URI input, where users can specify the
reference backend and the location.

Add the required changes to obtain and propagate this value to the
individual backends. Add the necessary documentation and tests.

Traditionally, for linked worktrees, references were stored in the
'$GIT_DIR/worktrees/<wt_id>' path. But when using an alternate reference
storage path, it doesn't make sense to store the main worktree
references in the new path, and the linked worktree references in the
$GIT_DIR. So, let's store linked worktree references in
'$ALTERNATE_REFERENCE_DIR/worktrees/<wt_id>'. To do this, create the
necessary files and folders while also adding stubs in the $GIT_DIR path
to ensure that it is still considered a Git directory.

Ideally, we would want to pass in a `struct worktree *` to individual
backends, instead of passing the `gitdir`. This allows them to handle
worktree specific logic. Currently, that is not possible since the
worktree code is:

  - Tied to using the global `the_repository` variable.

  - Is not setup before the reference database during initialization of
    the repository.

Add a TODO in 'refs.c' to ensure we can eventually make that change.

Helped-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-25 09:38:41 -08:00
Patrick Steinhardt
d2fbe9af79 t7900: prepare for switch of the default strategy
The t7900 test suite is exercising git-maintenance(1) and is thus of
course heavily reliant on the exact maintenance strategy. This reliance
comes in two flavors:

  - One test explicitly wants to verify that git-gc(1) is run as part of
    `git maintenance run`. This test is adapted by explicitly picking the
    "gc" strategy.

  - The other tests assume a specific shape of the object database,
    which is dependent on whether or not we run auto-maintenance before
    we come to the actual subject under test. These tests are adapted by
    disabling auto-maintenance.

With these changes t7900 passes with both "gc" and "geometric" default
strategies.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-24 07:33:20 -08:00
Patrick Steinhardt
38ae87c1ba t6500: explicitly use "gc" strategy
The test in t6500 explicitly wants to exercise git-gc(1) and is thus
highly specific to the actual on-disk state of the repository and
specifically of the object database. An upcoming change modifies the
default maintenance strategy to be the "geometric" strategy though,
which breaks a couple of assumptions.

One fix would arguably be to disable auto-maintenance altogether, as we
do want to explicitly verify git-gc(1) anyway. But as the whole test
suite is about git-gc(1) in the first place it feels more sensible to
configure the default maintenance strategy to be "gc".

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-24 07:33:20 -08:00
Patrick Steinhardt
94f5d9f09e t5510: explicitly use "gc" strategy
One of the tests in t5510 wants to verify that auto-gc does not lock up
when fetching into a repository. Adapt it to explicitly pick the "gc"
strategy for auto-maintenance.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-24 07:33:19 -08:00
Patrick Steinhardt
0894704369 t5400: explicitly use "gc" strategy
In t5400 we verify that git-receive-pack(1) runs automated repository
maintenance in the remote repository. The check is performed indirectly
by observing an effect that git-gc(1) would have, namely to prune a
temporary object from the object database. In a subsequent commit we're
about to switch to the "geometric" strategy by default though, and here
we stop observing that effect.

Adapt the test to explicitly use the "gc" strategy to prepare for that
upcoming change.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-24 07:33:19 -08:00
Patrick Steinhardt
ea7d894f44 t34xx: don't expire reflogs where it matters
We have a couple of tests in the t34xx range that rely on reflogs. This
never really used to be a problem, but in a subsequent commit we will
change the default maintenance strategy from "gc" to "geometric", and
this will cause us to drop all reflogs in these tests.

This may seem surprising and like a bug at first, but it's actually not.
The main difference between these two strategies is that the "gc"
strategy will skip all maintenance in case the object database is in a
well-optimized state. The "geometric" strategy has separate subtasks
though, and the conditions for each of these tasks is evaluated on a
case by case basis. This means that even if the object database is in
good shape, we may still decide to expire reflogs.

So why is that a problem? The issue is that Git's test suite hardcodes
the committer and author dates to a date in 2005. Interestingly though,
these hardcoded dates not only impact the commits, but also the reflog
entries. The consequence is that all newly written reflog entries are
immediately considered stale as our reflog expiration threshold is in
the range of weeks, only. It follows that executing `git reflog expire`
will thus immediately purge all reflog entries.

This hasn't been a problem in our test suite by pure chance, as the
repository shapes simply didn't cause us to perform actual garbage
collection. But with the upcoming "geometric" strategy we _will_ start
to execute `git reflog expire`, thus surfacing this issue.

Prepare for this by explicitly disabling reflog expiration in tests
impacted by this upcoming change.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-24 07:33:19 -08:00
Patrick Steinhardt
5e6c612720 t: disable maintenance where we verify object database structure
We have a couple of tests that explicitly verify the structure of the
object database. Naturally, this structure is dependent on whether or
not we run repository maintenance: if it decides to optimize the object
database the expected structure is likely to not materialize.

Explicitly disable auto-maintenance in such tests so that we are not
dependent on decisions made by our maintenance.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-24 07:33:19 -08:00
Patrick Steinhardt
09505b1115 t: fix races caused by background maintenance
Many Git commands spawn git-maintenance(1) to optimize the repository in
the background. By default, performing the maintenance is for most of
the part asynchronous: we fork the executable and then continue with the
rest of our business logic.

This is working as expected for our users, but this behaviour is
somewhat problematic for our test suite as this is inherently racy. We
have many tests that verify the on-disk state of repositories, and those
tests may easily race with our background maintenance. In a similar
fashion, we may end up with processes that "leak" out of a current test
case.

Until now this tends to not be much of a problem. Our maintenance uses
git-gc(1) by default, which knows to bail out in case there aren't
either too many packfiles or too many loose objects. So even if other
data structures would need to be optimized, we won't do so unless the
object database also needs optimizations.

This is about to change though, as a subsequent commit will switch to
the "geometric" maintenance strategy as a default. The consequence is
that we will run required optimizations even if the object database is
well-optimized. And this uncovers races between our test suite and
background maintenance all over the place.

Disabling maintenance outright in our test suite is not really an
option, as it would result in significant divergence from the "real
world" and reduce our test coverage. But we've got an alternative up our
sleeves: we can ensure that garbage collection runs synchronously by
overriding the "maintenance.autoDetach" configuration.

Of course that also diverges from the real world, as we now stop testing
that background maintenance interacts in a benign way with normal Git
commands. But on the other hand this ensures that the maintenance itself
does not for example lead to data loss in a more reproducible way.

Another concern is that this would make execution of the test suite much
slower. But a quick benchmark on my machine demonstrates that this does
not seem to be the case:

    Benchmark 1: meson test (revision = HEAD~)
      Time (mean ± σ):     131.182 s ±  1.293 s    [User: 853.737 s, System: 1160.479 s]
      Range (min … max):   130.001 s … 132.563 s    3 runs

    Benchmark 2: meson test (revision = HEAD)
      Time (mean ± σ):     129.554 s ±  0.507 s    [User: 849.040 s, System: 1152.664 s]
      Range (min … max):   129.000 s … 129.994 s    3 runs

    Summary
      meson test (revision = HEAD) ran
        1.01 ± 0.01 times faster than meson test (revision = HEAD~)

Funny enough, it even seems as if this speeds up test execution ever so
slightly, but that may just as well be noise.

Introduce a new `GIT_TEST_MAINT_AUTO_DETACH` environment variable that
allows us to override the auto-detach behaviour and set that variable in
our tests.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-24 07:33:19 -08:00
Han Young
2d88ab078d diffcore-break: avoid segfault with freed entries
After we have freed the file pair, we should set the queue reference to null.
When computing a diff in a partial clone, there is a chance that we
could trigger a prefetch of missing objects when there are freed entries in
the global diff queue due to break-rewrites detection. The segfault only occurs
if an entry has been freed by break-rewrites and there is an entry
to be prefetched.

There is a new test in t4067 that trigger the segmentation fault that results
in this case. The test explicitly fetch the necessary blobs to trigger the
break rewrites, some blobs are left to be prefetched.

The fix is to set the queue pointer to NULL after it is freed, the prefetch
will skip NULL entries.

Signed-off-by: Han Young <hanyang.tony@bytedance.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-02-24 07:20:44 -08:00