Junio C Hamano [Tue, 3 Mar 2026 01:21:00 +0000 (17:21 -0800)]
Merge branch 'lp/diff-stat-utf8-display-width-fix' into next
"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
Junio C Hamano [Tue, 3 Mar 2026 01:21:00 +0000 (17:21 -0800)]
Merge branch 'jh/alias-i18n-fixes' into next
Further update to the i18n alias support to avoid regressions.
* jh/alias-i18n-fixes:
git, help: fix memory leaks in alias listing
alias: treat empty subsection [alias ""] as plain [alias]
doc: fix list continuation in alias subsection example
Junio C Hamano [Tue, 3 Mar 2026 01:06:53 +0000 (17:06 -0800)]
Merge branch 'jt/object-file-use-container-of'
Code clean-up.
* jt/object-file-use-container-of:
object-file.c: avoid container_of() of a NULL container
object-file: use `container_of()` to convert from base types
Junio C Hamano [Tue, 3 Mar 2026 01:06:53 +0000 (17:06 -0800)]
Merge branch 'ps/receive-pack-shallow-optim'
The code to accept shallow "git push" has been optimized.
* ps/receive-pack-shallow-optim:
commit: use commit graph in `lookup_commit_reference_gently()`
commit: make `repo_parse_commit_no_graph()` more robust
commit: avoid parsing non-commits in `lookup_commit_reference_gently()`
Junio C Hamano [Tue, 3 Mar 2026 01:06:52 +0000 (17:06 -0800)]
Merge branch 'ps/object-info-bits-cleanup'
A couple of bugs in use of flag bits around odb API has been
corrected, and the flag bits reordered.
* ps/object-info-bits-cleanup:
odb: convert `odb_has_object()` flags into an enum
odb: convert object info flags into an enum
odb: drop gaps in object info flag values
builtin/fsck: fix flags passed to `odb_has_object()`
builtin/backfill: fix flags passed to `odb_has_object()`
"git subtree split --prefix=P <commit>" now checks the prefix P
against the tree of the (potentially quite different from the
current working tree) given commit.
* ps/validate-prefix-in-subtree-split:
subtree: validate --prefix against commit in split
A signature on a commit that was GPG signed long time ago ought to
be still valid after the key that was used to sign it has expired,
but we showed them in alarming red.
* uk/signature-is-good-after-key-expires:
gpg-interface: signatures by expired keys are fine
Junio C Hamano [Tue, 3 Mar 2026 01:06:50 +0000 (17:06 -0800)]
Merge branch 'ps/odb-for-each-object'
Revamp object enumeration API around odb.
* ps/odb-for-each-object:
odb: drop unused `for_each_{loose,packed}_object()` functions
reachable: convert to use `odb_for_each_object()`
builtin/pack-objects: use `packfile_store_for_each_object()`
odb: introduce mtime fields for object info requests
treewide: drop uses of `for_each_{loose,packed}_object()`
treewide: enumerate promisor objects via `odb_for_each_object()`
builtin/fsck: refactor to use `odb_for_each_object()`
odb: introduce `odb_for_each_object()`
packfile: introduce function to iterate through objects
packfile: extract function to iterate through objects of a store
object-file: introduce function to iterate through objects
object-file: extract function to read object info from path
odb: fix flags parameter to be unsigned
odb: rename `FOR_EACH_OBJECT_*` flags
Exit early if the hooks do not exist, to avoid spinning up/down
sideband async threads which no-op.
It is important to call the hook_exists() API provided by hook.[ch]
because it covers both config-defined hooks and the "traditional"
hooks from the hookdir. find_hook() only covers the hookdir hooks.
The regression happened because the no-op async threads add some
additional overhead which can be measured with the receive-refs test
of the benchmarks suite [1].
Fixes: fc148b146ad4 ("receive-pack: convert update hooks to new API") Reported-by: Patrick Steinhardt <ps@pks.im> Helped-by: Jeff King <peff@peff.net> Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
[jc: avoid duplicated hardcoded hook names] Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano [Fri, 27 Feb 2026 23:16:30 +0000 (15:16 -0800)]
Merge branch 'ps/fsck-stream-from-the-right-object-instance' into next
"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
Junio C Hamano [Fri, 27 Feb 2026 23:16:30 +0000 (15:16 -0800)]
Merge branch 'ob/core-attributesfile-in-repository' into next
The core.attributesfile is intended to be set per repository, but
were kept track of by a single global variable in-core, which has
been corrected by moving it to per-repository data structure.
* ob/core-attributesfile-in-repository:
environment: move "branch.autoSetupMerge" into `struct repo_config_values`
environment: stop using core.sparseCheckout globally
environment: stop storing `core.attributesFile` globally
Junio C Hamano [Fri, 27 Feb 2026 23:16:30 +0000 (15:16 -0800)]
Merge branch 'ar/config-hooks' into next
Allow hook commands to be defined (possibly centrally) in the
configuration files, and run multiple of them for the same hook
event.
* ar/config-hooks:
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
Junio C Hamano [Fri, 27 Feb 2026 23:11:53 +0000 (15:11 -0800)]
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
Junio C Hamano [Fri, 27 Feb 2026 23:11:52 +0000 (15:11 -0800)]
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
Junio C Hamano [Fri, 27 Feb 2026 23:11:52 +0000 (15:11 -0800)]
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
Junio C Hamano [Fri, 27 Feb 2026 23:11:52 +0000 (15:11 -0800)]
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
Junio C Hamano [Fri, 27 Feb 2026 23:11:51 +0000 (15:11 -0800)]
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"
Junio C Hamano [Fri, 27 Feb 2026 23:11:50 +0000 (15:11 -0800)]
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
Junio C Hamano [Fri, 27 Feb 2026 23:11:50 +0000 (15:11 -0800)]
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
LorenzoPegorari [Fri, 27 Feb 2026 21:48:35 +0000 (22:48 +0100)]
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>
LorenzoPegorari [Fri, 27 Feb 2026 21:45:19 +0000 (22:45 +0100)]
diff: handle ANSI escape codes in prefix when calculating diffstat width
The diffstat width is calculated by taking the terminal width and
incorrectly subtracting the `strlen()` of `line_prefix`, instead of the
actual display width of `line_prefix`, which may contain ANSI escape
codes (e.g., ANSI-colored strings in `log --graph --stat`).
Utilize the display width instead, obtained via `utf8_strnwidth()` with
the flag `skip_ansi`.
Signed-off-by: LorenzoPegorari <lorenzo.pegorari2002@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
K Jayatheerth [Mon, 23 Feb 2026 13:52:48 +0000 (19:22 +0530)]
repo: remove unnecessary variable shadow
Avoid redeclaring `entry` inside the conditional block, removing
unnecessary variable shadowing and improving code clarity without
changing behavior.
Signed-off-by: K Jayatheerth <jayatheerthkulkarni2005@gmail.com> Acked-by: Justin Tobler <jltobler@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jonatan Holmgren [Thu, 26 Feb 2026 20:53:28 +0000 (21:53 +0100)]
git, help: fix memory leaks in alias listing
The list_aliases() function sets the util pointer of each list item to
a heap-allocated copy of the alias command value. Two callers failed
to free these util pointers:
- list_cmds() in git.c collects a string list with STRING_LIST_INIT_DUP
and clears it with string_list_clear(&list, 0), which frees the
duplicated strings (strdup_strings=1) but not the util pointers.
Pass free_util=1 to free them.
- list_cmds_by_config() in help.c calls string_list_sort_u(list, 0) to
deduplicate the list before processing completion.commands overrides.
When duplicate entries are removed, the util pointer of each discarded
item is leaked because free_util=0. Pass free_util=1 to free them.
Reported-by: Jacob Keller <jacob.e.keller@intel.com> Signed-off-by: Jonatan Holmgren <jonatan@jontes.page> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jonatan Holmgren [Thu, 26 Feb 2026 20:53:27 +0000 (21:53 +0100)]
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>
Jonatan Holmgren [Thu, 26 Feb 2026 20:53:26 +0000 (21:53 +0100)]
doc: fix list continuation in alias subsection example
The example showing the equivalence between alias.last and
alias.last.command was missing the list continuation marks (+
between the shell session block and the following prose, leaving
the paragraph detached from the list item in the rendered output.
Signed-off-by: Jonatan Holmgren <jonatan@jontes.page> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano [Thu, 26 Feb 2026 18:06:17 +0000 (10:06 -0800)]
Merge branch 'ds/config-list-with-type' into next
"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()
Junio C Hamano [Thu, 26 Feb 2026 18:06:17 +0000 (10:06 -0800)]
Merge branch 'en/merge-ort-almost-wo-the-repository' into next
Mark the marge-ort codebase to prevent more uses of the_repository
from getting added.
* en/merge-ort-almost-wo-the-repository:
replay: prevent the_repository from coming back
merge-ort: prevent the_repository from coming back
merge-ort: replace the_hash_algo with opt->repo->hash_algo
merge-ort: replace the_repository with opt->repo
merge-ort: pass repository to write_tree()
merge,diff: remove the_repository check before prefetching blobs
Junio C Hamano [Thu, 26 Feb 2026 18:06:17 +0000 (10:06 -0800)]
Merge branch 'lo/repo-leftover-bits' into next
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
Junio C Hamano [Thu, 26 Feb 2026 18:06:17 +0000 (10:06 -0800)]
Merge branch 'ps/maintenance-geometric-default' into next
"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
Junio C Hamano [Thu, 26 Feb 2026 18:06:15 +0000 (10:06 -0800)]
Merge branch 'rr/gitweb-mobile' into next
"gitweb" has been taught to be mobile friendly.
* rr/gitweb-mobile:
gitweb: let page header grow on mobile for long wrapped project names
gitweb: fix mobile footer overflow by wrapping text and clearing floats
gitweb: fix mobile page overflow across log/commit/blob/diff views
gitweb: prevent project search bar from overflowing on mobile
gitweb: add viewport meta tag for mobile devices
Junio C Hamano [Thu, 26 Feb 2026 18:06:13 +0000 (10:06 -0800)]
Merge branch 'kn/ref-location' into next
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()`
Harald Nordgren [Thu, 26 Feb 2026 10:33:42 +0000 (10:33 +0000)]
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>
environment: move "branch.autoSetupMerge" into `struct repo_config_values`
The config value `branch.autoSetupMerge` is parsed in
`git_default_branch_config()` and stored in the global variable
`git_branch_track`. This global variable can be overwritten
by another repository when multiple Git repos run in the the same process.
Move this value into `struct repo_config_values` in the_repository to
retain current behaviours and move towards libifying Git.
Since the variable is no longer a global variable, it has been renamed to
`branch_track` in the struct `repo_config_values`.
Suggested-by: Phillip Wood <phillip.wood123@gmail.com> Mentored-by: Christian Couder <christian.couder@gmail.com> Mentored-by: Usman Akinyemi <usmanakinyemi202@gmail.com> Signed-off-by: Olamide Caleb Bello <belkid98@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
environment: stop using core.sparseCheckout globally
The config value `core.sparseCheckout` is parsed in
`git_default_core_config()` and stored globally in
`core_apply_sparse_checkout`. This could cause it to be overwritten
by another repository when different Git repositories run in the same
process.
Move the parsed value into `struct repo_config_values` in the_repository
to retain current behaviours and move towards libifying Git.
Suggested-by: Phillip Wood <phillip.wood123@gmail.com> Mentored-by: Christian Couder <christian.couder@gmail.com> Mentored-by: Usman Akinyemi <usmanakinyemi202@gmail.com> Signed-off-by: Olamide Caleb Bello <belkid98@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Junio C Hamano [Wed, 25 Feb 2026 20:13:17 +0000 (12:13 -0800)]
Merge branch 'hy/diff-lazy-fetch-with-break-fix' into next
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
Junio C Hamano [Wed, 25 Feb 2026 20:13:16 +0000 (12:13 -0800)]
Merge branch 'cs/subtree-split-fixes' into next
An earlier attempt to optimize "git subtree" discarded too much
relevant histories, which has been corrected.
* cs/subtree-split-fixes:
contrib/subtree: process out-of-prefix subtrees
contrib/subtree: test history depth
contrib/subtree: capture additional test-cases
Junio C Hamano [Wed, 25 Feb 2026 19:54:18 +0000 (11:54 -0800)]
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
Junio C Hamano [Wed, 25 Feb 2026 19:54:16 +0000 (11:54 -0800)]
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
Documentation/git-repo: capitalize format descriptions
The descriptions for the git-repo output formats are in lowercase.
Capitalize these descriptions, making them consistent with the rest of
the documentation.
Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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>
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>
repo: replace get_value_fn_for_key by get_repo_info_field
Remove the function `get_value_fn_for_key`, which returns a function that
retrieves a value for a certain repo info key. Introduce `get_repo_info_field`
instead, which returns a struct field.
This refactor makes the structure of the function print_fields more consistent
to the function print_all_fields, improving its readability.
Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Rename repo_info_fields as repo_info_field, following the CodingGuidelines rule
for naming arrays in singular. Rename all the references to that array
accordingly.
Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
CodingGuidelines: instruct to name arrays in singular
Arrays should be named in the singular form, ensuring that when
accessing an element within an array (e.g. dog[0]) it's clear that
we're referring to an element instead of a collection.
Add a new rule to CodingGuidelines asking for arrays to be named in
singular instead of plural.
Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Karthik Nayak [Wed, 25 Feb 2026 09:40:46 +0000 (10:40 +0100)]
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>
Karthik Nayak [Wed, 25 Feb 2026 09:40:45 +0000 (10:40 +0100)]
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>
Karthik Nayak [Wed, 25 Feb 2026 09:40:44 +0000 (10:40 +0100)]
refs: receive and use the reference storage payload
An upcoming commit will add support for providing an URI via the
'extensions.refStorage' config. The URI will contain the reference
backend and a corresponding payload. The payload can be then used for
providing an alternate locations for the reference backend.
To prepare for this, modify the existing backends to accept such an
argument when initializing via the 'init()' function. Both the files
and reftable backends will parse the information to be filesystem paths
to store references. Given that no callers pass any payload yet this is
essentially a no-op change for now.
To enable this, provide a 'refs_compute_filesystem_location()' function
which will parse the current 'gitdir' and the 'payload' to provide the
final reference directory and common reference directory (if working in
a linked worktree).
The documentation and tests will be added alongside the extension of the
config variable.
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>
Karthik Nayak [Wed, 25 Feb 2026 09:40:43 +0000 (10:40 +0100)]
refs: move out stub modification to generic layer
When creating the reftable reference backend on disk, we create stubs to
ensure that the directory can be recognized as a Git repository. This is
done by calling `refs_create_refdir_stubs()`. Move this to the generic
layer as this is needed for all backends excluding from the files
backends. In an upcoming commit where we introduce alternate reference
backend locations, we'll have to also create stubs in the $GIT_DIR
irrespective of the backend being used. This commit builds the base to
add that logic.
Similarly, move the logic for deletion of stubs to the generic layer.
The files backend recursively calls the remove function of the
'packed-backend', here skip calling the generic function since that
would try to delete stubs.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Here, #1 and #3 are part of the reference storage mechanism,
specifically the files backend. Since then, newer backends such as the
reftable backend have moved to using their own path ('reftable/') for
storing references. But to ensure Git still recognizes the directory as
a Git directory, we create stubs.
There are two locations where we create stubs:
- In 'refs/reftable-backend.c' when creating the reftable backend.
- In 'clone.c' before spawning transport helpers.
In a following commit, we'll add another instance. So instead of
repeating the code, let's extract out this code to
`refs_create_refdir_stubs()` and use it.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Karthik Nayak [Wed, 25 Feb 2026 09:40:41 +0000 (10:40 +0100)]
setup: don't modify repo in `create_reference_database()`
The `create_reference_database()` function is used to create the
reference database during initialization of a repository. The function
calls `repo_set_ref_storage_format()` to set the repositories reference
format. This is an unexpected side-effect of the function. More so
because the function is only called in two locations:
1. During git-init(1) where the value is propagated from the `struct
repository_format repo_fmt` value.
2. During git-clone(1) where the value is propagated from the
`the_repository` value.
The former is valid, however the flow already calls
`repo_set_ref_storage_format()`, so this effort is simply duplicated.
The latter sets the existing value in `the_repository` back to itself.
While this is okay for now, introduction of more fields in
`repo_set_ref_storage_format()` would cause issues, especially
dynamically allocated strings, where we would free/allocate the same
string back into `the_repostiory`.
To avoid all this confusion, clean up the function to no longer take in
and set the repo's reference storage format.
Signed-off-by: Karthik Nayak <karthik.188@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
D. Ben Knoble [Tue, 24 Feb 2026 14:39:44 +0000 (09:39 -0500)]
build: regenerate config-list.h when Documentation changes
The Meson-based build doesn't know when to rebuild config-list.h, so the
header is sometimes stale.
For example, an old build directory might have config-list.h from before 4173df5187 (submodule: introduce extensions.submodulePathConfig,
2026-01-12), which added submodule.<name>.gitdir to the list. Without
it, t9902-completion.sh fails. Regenerating the config-list.h artifact
from sources fixes the artifact and the test.
Since Meson does not have (or want) builtin support for globbing like
Make, teach generate-configlist.sh to also generate a list of
Documentation files its output depends on, and incorporate that into the
Meson build. We honor the undocumented GCC/Clang contract of outputting
empty targets for all the dependencies (like they do with -MP). That is,
generate lines like
We assume that if a user adds a new file under
Documentation/config then they will also edit one of the existing files
to include that new file, and that will trigger a rebuild. Also mark the
generator script as a dependency.
While we're at it, teach the Makefile to use the same "the script knows
it's dependencies" logic.
For Meson, combining the following commands helps debug dependencies:
The former lists all the dependencies discovered from our output ".d"
file (the config documentation) and the latter shows the dependency on
the script itself, among other useful edges in the dependency graph.
Helped-by: Patrick Steinhardt <ps@pks.im> Helped-by: Phillip Wood <phillip.wood@dunelm.org.uk> Signed-off-by: D. Ben Knoble <ben.knoble+github@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>