What's cooking in git.git (Jan 2026, #05)

What's cooking in git.git (Jan 2026, #05)

[Junio C Hamano]

Here are the topics that have been cooking in my tree.  Commits
prefixed with '+' are in 'next' (being in 'next' is a sign that a
topic is stable enough to be used and are candidate to be in a
future release).  Commits prefixed with '-' are only in 'seen', and
aren't considered "accepted" at all and may be annotated with an URL
to a message that raises issues but they are no means exhaustive.  A
topic without enough support may be discarded after a long period of
no activity (of course they can be resubmit when new interests
arise).

Git 2.53-rc0 has been tagged, but do not read too much into it.  The
fallout from the run-command-hook topic hasn't been sorted out yet,
which hopefully should happen before -rc1.

Many topics that expected but haven't seen a reroll for quite some
time, and/or haven't collected visible support, are moved to the
[Stalled] category to be discarded; of course it is perfectly OK to
breeze new life into them, once the pre-release freeze is over, but
I'd prefer not to distract ourselves during the pre-release period
with them.

Copies of the source code to Git live in many repositories, and the
following is a list of the ones I push into or their mirrors.  Some
repositories have only a subset of branches.

With maint, master, next, seen, todo:

	git://git.kernel.org/pub/scm/git/git.git/
	git://repo.or.cz/alt-git.git/
	https://kernel.googlesource.com/pub/scm/git/git/
	https://github.com/git/git/
	https://gitlab.com/git-scm/git/

With all the integration branches and topics broken out:

	https://github.com/gitster/git/

Even though the preformatted documentation in HTML and man format
are not sources, they are published in these repositories for
convenience (replace "htmldocs" with "manpages" for the manual
pages):

	git://git.kernel.org/pub/scm/git/git-htmldocs.git/
	https://github.com/gitster/git-htmldocs.git/

Release tarballs are available at:

	https://www.kernel.org/pub/software/scm/git/

--------------------------------------------------
[Graduated to 'master']

* kh/replay-invalid-onto-advance (2026-01-05) 6 commits
  (merged to 'next' on 2026-01-08 at 1024748f91)
 + t3650: add more regression tests for failure conditions
 + replay: die if we cannot parse object
 + replay: improve code comment and die message
 + replay: die descriptively when invalid commit-ish is given
 + replay: find *onto only after testing for ref name
 + replay: remove dead code and rearrange
 (this branch is used by ps/history and pw/replay-drop-empty.)

 Improve the error message when a bad argument is given to the
 `--onto` option of "git replay".  Test coverage of "git replay" has
 been improved.
 cf. <CABPp-BGFNyKkpcWWksqvNqyXspMqfywbYyyhuSUaL41YHNHoNg@mail.gmail.com>
 source: <V3_CV_replay_die_descr.1a4@msgid.xyz>


* ps/clar-integers (2025-12-06) 3 commits
  (merged to 'next' on 2026-01-08 at 9f9674ac20)
 + gitattributes: disable blank-at-eof errors for clar test expectations
 + t/unit-tests: demonstrate use of integer comparison assertions
 + t/unit-tests: update clar to 39f11fe

 Import newer version of "clar", unit testing framework.
 source: <20251206-b4-pks-clar-update-v2-0-9a14b10c1a36@pks.im>


* ps/odb-misc-fixes (2026-01-06) 3 commits
  (merged to 'next' on 2026-01-08 at 850d35a76d)
 + odb: properly close sources before freeing them
 + builtin/gc: fix condition for whether to write commit graphs
 + Merge branch 'ps/object-source-management' into ps/odb-misc-fixes
 (this branch is used by ps/packfile-store-in-odb-source.)

 Miscellaneous fixes on object database layer.
 source: <20260106-odb-related-fixes-v3-0-7ac157207b20@pks.im>


* pt/t7800-difftool-test-racefix (2026-01-03) 1 commit
  (merged to 'next' on 2026-01-06 at 572d775bca)
 + t7800: fix racy "difftool --dir-diff syncs worktree" test

 Test fixup.
 source: <pull.2149.v3.git.git.1767472809897.gitgitgadget@gmail.com>

--------------------------------------------------
[Stalled]

* dw/config-global-list (2025-10-09) 4 commits
 - config: keep bailing on unreadable global files
 - config: read global scope via config_sequence
 - config: test home and xdg files in `list --global`
 - cleanup_path: force forward slashes on Windows

 "git config --list --global", unlike "git config --list", did not
 consult both of the two possible per-user sources of the
 configuration files, i.e. $HOME/.gitconfig and the XDG one, which
 has been corrected.

 Will discard. Has been waiting for a reroll for too long.
 cf. <20251122020047.GB3947@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net>
 source: <pull.1938.git.1760058849.gitgitgadget@gmail.com>


* ms/doc-worktree-side-by-side (2025-10-10) 2 commits
 - doc: git-worktree: Add side by side branch checkout example
 - doc: git-worktree: Link to examples

 Document "git worktree add" and use of out-of-tree worktrees with
 examples.

 Will discard. Has been waiting for a reroll for too long.
 cf. <CAPig+cSNesf0UwS4=Bxe-Qn+G9y3YYPyOK+7y3q8QJk+o7jaVg@mail.gmail.com>
 source: <a203b35538847f3c9358a5ae26fb4ebea5734cfc.1759420102.git.msuchanek@suse.de>


* jc/exclude-with-gitignore (2025-11-04) 1 commit
 - dir.c: do not be fooled by :(exclude) pathspec elements

 "git add ':(exclude)foo.o'" is clearly a request not to add 'foo.o',
 but the command complained about listing an ignored path foo.o on
 the command line, which has been corrected.

 Will discard. Has been waiting for further comments for too long.
 source: <xmqqtsz9o3cn.fsf@gitster.g>


* lc/rebase-trailer (2025-11-05) 4 commits
 - rebase: support --trailer
 - trailer: append trailers in-process and drop the fork to `interpret-trailers`
 - trailer: move process_trailers to trailer.h
 - interpret-trailers: factor out buffer-based processing to process_trailers()

 Refactor code paths to run "interpret-trailers" from "git
 commit/tag" and use it in "git rebase".

 Will discard. Has been waiting for a reroll for too long.
 cf. <19a8fe42354.3909481a3912041.7970296104893780556@linux.beauty>
 source: <20251105142944.73061-1-me@linux.beauty>


* sp/shallow-time-boundary (2025-11-23) 1 commit
 - shallow: set borders which are all reachable after clone shallow since

 The set of shallow boundary "git clone --shallow-since" leaves
 contained commits that are not on the boundary, which has been
 corrected.

 Will discard. Has been waiting for further comments for too long.
 source: <pull.2107.v2.git.git.1763926552033.gitgitgadget@gmail.com>


* tc/last-modified-options-cleanup (2025-11-26) 4 commits
 - fixup! last-modified: document option --max-depth
 - last-modified: document how depth is handled better
 - last-modified: document option --max-depth
 - last-modified: handle and document NUL termination

 The "-z" and "--max-depth" documentation (and implementation of
 "-z") in the "git last-modified" command have been updated.

 Will discard. Has been waiting for a reroll for too long.
 source: <20251126-toon-last-modified-zzzz-v1-0-608350df0caa@iotcl.com>


* jk/parse-int (2025-11-30) 5 commits
 - fsck: use parse_unsigned_from_buf() for parsing timestamp
 - cache-tree: use parse_int_from_buf()
 - parse: add functions for parsing from non-string buffers
 - parse: prefer bool to int for boolean returns
 - Merge branch 'jk/asan-bonanza' into jk/parse-int

 Introduce a more robust way to parse a decimal integer stored in a
 piece of memory that is not necessarily terminated with NUL (which
 Asan strict-string-check complains even when use of strtol() is
 safe due to varified existence of whitespace after the digits).

 Will discard. Has been waiting for a reroll for too long.
 cf. <aTFvKOHlm4zfT9dU@pks.im>
 cf. <4d83375b-76e2-4420-80dd-6a04d3201532@gmail.com>
 source: <20251130131351.GA198697@coredump.intra.peff.net>


* kn/ref-location (2025-12-01) 2 commits
 - refs: add GIT_REF_URI to specify reference backend and directory
 - refs: support obtaining ref_store for given dir

 A mechanism to specify what reference backend to use and store
 references in which directory is introduced, which would likely to
 be useful during ref migration.

 Will discard. Has been waiting for further comments for too long.
 source: <20251201-kn-alternate-ref-dir-v3-0-c11b946bc2fa@gmail.com>


* yc/histogram-hunk-shift-fix (2025-12-06) 1 commit
 - xdiff: re-diff shifted change groups when using histogram algorithm

 The final clean-up phase of the diff output could turn the result of
 histogram diff algorithm suboptimal, which has been corrected.

 Will discard. Has been waiting for further comments for too long.
 source: <pull.2120.git.git.1765054287938.gitgitgadget@gmail.com>


* js/neuter-sideband (2025-12-17) 4 commits
 - sideband: add options to allow more control sequences to be passed through
 - sideband: do allow ANSI color sequences by default
 - sideband: introduce an "escape hatch" to allow control characters
 - sideband: mask control characters

 Invalidate control characters in sideband messages, to avoid
 terminal state getting messed up.

 Will discard. Has been waiting for further comments for too long.
 cf. <aS-D5lD2Kk6BHNIl@fruit.crustytoothpaste.net>
 source: <pull.1853.v2.git.1765981422.gitgitgadget@gmail.com>

--------------------------------------------------
[New Topics]

* tc/last-modified-not-a-tree (2026-01-14) 3 commits
 - last-modified: verify revision argument is a commit-ish
 - last-modified: remove double error message
 - last-modified: rewrite error message when more than one revision given

 Giving "git last-modified" a tree (not a commit-ish) died an
 uncontrolled death, which has been corrected.

 Expecting a reroll?
 cf. <aWd2VcX7gERTDK2t@pks.im>
 cf. <bc0db8d5-3c5f-4dd4-9c35-ccb02a6bf5c9@app.fastmail.com>
 source: <20260114-toon-last-modified-tree-v2-0-ba3b1860898f@iotcl.com>


* sp/myfirstcontribution-include-update (2026-01-12) 1 commit
 - doc: MyFirstContribution: fix missing dependencies and clarify build steps

 Doc update.

 Will merge to 'next'?
 source: <20260112195625.391821-1-shreyanshpaliwalcmsmn@gmail.com>


* ar/run-command-hook-pre-push-fix (2026-01-14) 2 commits
 - hook: make ungroup opt-out instead of opt-in
 - hook: allow hooks to disable stdout_to_stderr
 (this branch uses ar/run-command-hook.)

 Recent update to use run-hooks API broke pre-push hook, which has
 been corrected.

 Will merge to 'next' and then to 'master'.
 source: <20260114185731.2381550-3-adrian.ratiu@collabora.com>


* cs/add-skip-submodule-ignore-all (2026-01-13) 5 commits
 - 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

 "git add <submodule>" has been taught to honor
 submodule.<name>.ignore that is set to "all" (and requires "git add
 -f" to override it).

 Expecting a reroll?
 cf. <B94F0800-06B5-47BC-8C22-AAE1882E5B9C@gmail.com>
 source: <37fe7956e089394bb1d75f4c8af4a3347b204803.1768376879.git.gitgitgadget@gmail.com>


* kn/ref-batch-output-error-reporting-fix (2026-01-14) 6 commits
 - receive-pack: utilize rejected ref error details
 - fetch: utilize rejected ref error details
 - update-ref: utilize rejected error details if available
 - refs: add rejection detail to the callback function
 - refs: attach rejection details to updates
 - refs: remove unused header

 A handful of code paths that started using batched ref update API
 (after Git 2.51 or so) lost detailed error output, which have been
 corrected.

 Expecting a reroll?
 cf. <20260114175558.GG885771@coredump.intra.peff.net>
 source: <20260114-633-regression-lost-diagnostic-message-when-pushing-non-commit-objects-to-refs-heads-v1-6-f5f8b173c501@gmail.com>


* ps/geometric-repacking-with-promisor-remotes (2026-01-05) 5 commits
  (merged to 'next' on 2026-01-15 at a5a24c2f14)
 + builtin/repack: handle promisor packs with geometric repacking
 + repack-promisor: extract function to remove redundant packs
 + repack-promisor: extract function to finalize repacking
 + repack-geometry: extract function to compute repacking split
 + builtin/pack-objects: exclude promisor objects with "--stdin-packs"

 "git repack --geometric" did not work with promisor packs, which
 has been corrected.

 Will merge to 'master'.
 source: <20260105-pks-geometric-repack-with-promisors-v1-0-c4660573437e@pks.im>


* tb/midx-write-corrupt-checksum-fix (2026-01-12) 3 commits
  (merged to 'next' on 2026-01-15 at c387b3f023)
 + midx-write.c: assume checksum-invalid MIDXs require an update
 + t/t5319-multi-pack-index.sh: drop early 'test_done'
 + Merge branch 'ps/repack-avoid-noop-midx-rewrite' into tb/midx-write-corrupt-checksum-fix
 (this branch is used by tb/incremental-midx-part-3.2.)

 The logic that avoids reusing MIDX files with a wrong checksum was
 broken, which has been corrected.

 Will merge to 'master'.
 source: <cover.1768261435.git.me@ttaylorr.com>


* ac/sparse-checkout-string-list-cleanup (2026-01-15) 1 commit
 - sparse-checkout: optimize string_list construction

 Code clean-up.

 Will merge to 'next'.
 source: <20260115130935.93526-1-amishhhaaaa@gmail.com>


* ps/commit-list-functions-renamed (2026-01-15) 3 commits
 - commit: rename `free_commit_list()` to conform to coding guidelines
 - commit: rename `reverse_commit_list()` to conform to coding guidelines
 - commit: rename `copy_commit_list()` to conform to coding guidelines

 Rename three functions around the commit_list data structure.

 Comments?
 source: <20260115-pks-commit-list-coding-guidelines-v1-0-c58868dbf412@pks.im>


* ps/config-doc-get-urlmatch-fix (2026-01-15) 1 commit
 - Documentation/config: fix replacement for --get-urlmatch

 Docfix.

 Will merge to 'next'.
 source: <20260115110832.15315-1-pushkarkumarsingh1970@gmail.com>


* ps/odb-for-each-object (2026-01-15) 16 commits
 - 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
 - Merge branch 'ps/packfile-store-in-odb-source' into ps/odb-for-each-object
 - Merge branch 'ps/read-object-info-improvements' into ps/odb-for-each-object
 (this branch uses ps/packfile-store-in-odb-source and ps/read-object-info-improvements.)

 Revamp object enumeration API around odb.

 Comments?
 source: <20260115-pks-odb-for-each-object-v1-0-5418a91d5d99@pks.im>


* ps/validate-prefix-in-subtree-split (2026-01-15) 1 commit
 - subtree: validate --prefix against commit in split

 "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.

 Expecting a reroll?
 source: <20260115122652.18673-2-pushkarkumarsingh1970@gmail.com>

--------------------------------------------------
[Cooking]

* bc/doc-stash-import-export (2026-01-08) 1 commit
  (merged to 'next' on 2026-01-10 at 48f26103bc)
 + gitfaq: document using stash import/export to sync working tree

 Update a FAQ entry on synching two separate repositories using the
 "git stash export/import" recently introduced.

 Will merge to 'master'.
 source: <20260109014608.42773-1-sandals@crustytoothpaste.net>


* ds/builtin-doc-update (2026-01-08) 1 commit
  (merged to 'next' on 2026-01-10 at a98a468cf0)
 + builtin.h: update documentation

 Update in-code comment doc to match the current API.

 Will merge to 'master'.
 source: <pull.2028.git.1767929941577.gitgitgadget@gmail.com>


* kh/doc-patch-id (2026-01-07) 6 commits
  (merged to 'next' on 2026-01-10 at 27a1d947d1)
 + doc: patch-id: --verbatim locks in --stable
 + doc: patch-id: spell out the git-diff-tree(1) form
 + doc: patch-id: use definite article for the result
 + patch-id: use “patch ID” throughout
 + doc: patch-id: capitalize Git version
 + doc: patch-id: don’t use semicolon between bullet points

 "git patch-id" documentation updates.

 Will merge to 'master'.
 source: <CV_doc_patch-id_3.1ab@msgid.xyz>


* kj/t7101-modernize (2026-01-08) 1 commit
  (merged to 'next' on 2026-01-10 at c33f8ae0bb)
 + t7101: modernize test path checks

 Test update.

 Will merge to 'master'.
 source: <20260109032027.68680-1-jayatheerthkulkarni2005@gmail.com>


* ar/run-command-hook (2026-01-09) 1 commit
  (merged to 'next' on 2026-01-10 at 236f60e30d)
 + hook: check for NULL pointer before deref
 (this branch is used by ar/run-command-hook-pre-push-fix.)

 Fix-up a topic that has recently graduated to 'master'.

 Will merge to 'master'.
 source: <20260109181912.689409-1-adrian.ratiu@collabora.com>


* ps/ref-consistency-checks (2026-01-12) 17 commits
  (merged to 'next' on 2026-01-13 at ba6c9deadb)
 + builtin/fsck: drop `fsck_head_link()`
 + builtin/fsck: move generic HEAD check into `refs_fsck()`
 + builtin/fsck: move generic object ID checks into `refs_fsck()`
 + refs/reftable: introduce generic checks for refs
 + refs/reftable: fix consistency checks with worktrees
 + refs/reftable: extract function to retrieve backend for worktree
 + refs/reftable: adapt includes to become consistent
 + refs/files: introduce function to perform normal ref checks
 + refs/files: extract generic symref target checks
 + fsck: drop unused fields from `struct fsck_ref_report`
 + refs/files: perform consistency checks for root refs
 + refs/files: improve error handling when verifying symrefs
 + refs/files: extract function to check single ref
 + refs/files: remove useless indirection
 + refs/files: remove `refs_check_dir` parameter
 + refs/files: move fsck functions into global scope
 + refs/files: simplify iterating through root refs

 Update code paths that check data integrity around refs subsystem.

 Will merge to 'master'.
 cf. <CAOLa=ZShPP3BPXa=YnC-vuX4zF=pUTFdUidZwOdna8bfVTNM9w@mail.gmail.com>
 source: <20260112-pks-refs-verify-fixes-v2-0-2e9e453bd6c3@pks.im>


* rs/tree-wo-the-repository (2026-01-09) 10 commits
 - cocci: convert parse_tree functions to repo_ variants
 - tree: stop using the_repository
 - tree: use repo_parse_tree()
 - path-walk: use repo_parse_tree_gently()
 - pack-bitmap-write: use repo_parse_tree()
 - delta-islands: use repo_parse_tree()
 - bloom: use repo_parse_tree()
 - add-interactive: use repo_parse_tree_indirect()
 - tree: add repo_parse_tree*()
 - environment: move access to core.maxTreeDepth into repo settings

 Remove implicit reliance on the_repository global in the APIs
 around tree objects and make it explicit which repository to work
 in.

 Comments?
 cf. <aWS9JLb3UyxOwg9Z@pks.im>
 source: <20260109213021.2546-1-l.s.r@web.de>


* cs/rebased-subtree-split (2026-01-09) 1 commit
  (merged to 'next' on 2026-01-13 at b213ccc8c1)
 + contrib/subtree: detect rewritten subtree commits

 The split command in "git subtree" (in contrib/) has been taught to
 deal better with rebased history.

 Will merge to 'master'.
 source: <20260110011811.788219-1-ask+git@howdoi.land>


* sp/shallow-deepen-relative-fix (2026-01-09) 2 commits
 - shallow: handling fetch relative-deepen
 - shallow: free local object_array allocations

 "git fetch --deepen" that tries to go beyond merged branch used to
 get confused where the updated shallow points are, which has been
 corrected.

 Expecting a reroll?
 cf. <11b951ab-b624-4ab8-b7b1-fe41a40c9d0e@app.fastmail.com>
 cf. <f021269b-c89c-41c8-aa08-2ec2443ac7e8@app.fastmail.com>
 source: <pull.2121.v2.git.git.1767997426.gitgitgadget@gmail.com>


* kt/http-backend-errors (2026-01-11) 1 commit
  (merged to 'next' on 2026-01-13 at 35d72c8eb9)
 + http-backend: write newlines to stderr when responding with errors

 Some error messages from the http transport layer lacked the
 terminating newline, which has been corrected.

 Will merge to 'master'.
 source: <20260112014508.17248-1-kj@kjtsanaktsidis.id.au>


* ps/t1410-cleanup (2026-01-11) 1 commit
  (merged to 'next' on 2026-01-13 at 51b666d16e)
 + t1410: use test helpers in reflog rewind test

 Test clean-up.

 Will merge to 'master'.
 source: <20260111191525.17087-1-pushkarkumarsingh1970@gmail.com>


* dd/t5403-modernise (2026-01-12) 2 commits
 - t5403: use test_cmp for post-checkout argument checks
 - t5403: introduce check_post_checkout helper function

 Test clean-up.

 Will merge to 'next'?
 source: <20260112163643.231-3-deveshigurgaon@gmail.com>


* ml/doc-blame-markup (2026-01-08) 2 commits
  (merged to 'next' on 2026-01-10 at 1f87b77810)
 + doc: git-blame: convert to new doc format
 + doc: blame-options: convert to new doc format

 Doc mark-up update.

 Will merge to 'master'.
 cf. <2813520.mvXUDI8C0e@piment-oiseau>
 source: <20260108153039.658217-1-git@michael.lyo.nz>


* ac/t1420-use-more-direct-check (2026-01-06) 1 commit
  (merged to 'next' on 2026-01-10 at 6bccdd0e04)
 + t1420: modernize the lost-found test

 Test update.

 Will merge to 'master'.
 source: <20260106132658.798706-1-andchi@fastmail.com>


* ag/http-netrc-tests (2026-01-06) 1 commit
 - t5550: add netrc tests for http 401/403

 Additional tests were introduced to see the interaction with netrc
 auth with auth failure on the http transport.

 Comments?
 source: <20260106114029.763351-1-git@ashlesh.me>


* jk/cat-file-avoid-bitmap-when-unneeded (2026-01-06) 1 commit
  (merged to 'next' on 2026-01-10 at 5e3f0240f7)
 + cat-file: only use bitmaps when filtering

 Fix for a performance regression in "git cat-file".

 Will merge to 'master'.
 cf. <aV4Xa9ceY4ahYj2m@pks.im>
 source: <20260106102558.GA68914@coredump.intra.peff.net>


* jk/t-perf-fixes (2026-01-06) 2 commits
  (merged to 'next' on 2026-01-10 at 9a633e87df)
 + t/perf/run: preserve GIT_PERF_* from environment
 + t/perf/perf-lib: fix assignment of TEST_OUTPUT_DIRECTORY

 Perf-test fixes.

 Will merge to 'master'.
 source: <20260106101043.GA3723319@coredump.intra.peff.net>


* en/xdiff-cleanup-3 (2026-01-03) 11 commits
 - SQUASH??? cocci
 - xdiff: move xdl_cleanup_records() from xprepare.c to xdiffi.c
 - xdiff: remove dependence on xdlclassifier from xdl_cleanup_records()
 - xdiff: replace xdfile_t.dend with xdfenv_t.delta_end
 - xdiff: replace xdfile_t.dstart with xdfenv_t.delta_start
 - xdiff: cleanup xdl_trim_ends()
 - xdiff: use xdfenv_t in xdl_trim_ends() and xdl_cleanup_records()
 - xdiff: let patience and histogram benefit from xdl_trim_ends()
 - xdiff: don't waste time guessing the number of lines
 - xdiff: make classic diff explicit by creating xdl_do_classic_diff()
 - ivec: introduce the C side of ivec

 Preparation of xdiff/ codebase to work with Rust

 Comments?
 source: <pull.2156.git.git.1767379944.gitgitgadget@gmail.com>


* hn/status-compare-with-push (2026-01-13) 2 commits
 - status: show comparison with push remote tracking branch
 - refactor format_branch_comparison in preparation

 "git status" learned to show comparison between the current branch
 and its push destination as well as its upstream, when the two are
 different (i.e., triangular workflow).

 Will merge to 'next'?
 source: <pull.2138.v25.git.git.1768306316.gitgitgadget@gmail.com>


* ob/core-attributesfile-in-repository (2026-01-13) 3 commits
 - environment: move "branch.autoSetupMerge" into `struct repo_config_values`
 - environment: environment: stop using core.sparseCheckout globally
 - environment: stop storing `core.attributesFile` globally

 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.

 Comments?
 source: <cover.1768318762.git.belkid98@gmail.com>


* aa/add-p-previous-decisions (2026-01-08) 1 commit
 - add -p: show user's hunk decision when selecting hunks

 "git add -p" and friends notes what the current status of the hunk
 being shown is.

 Will merge to 'next'?
 source: <aV_IGCld5T_dBxTs@Adekunles-MacBook-Air.local>


* pt/fsmonitor-linux (2025-12-31) 1 commit
 - fsmonitor: implement filesystem change listener for Linux

 The fsmonitor daemon has been implemented for Linux.

 Comments?
 source: <pull.2147.v4.git.git.1767202894884.gitgitgadget@gmail.com>


* pt/t7527-flake-workaround (2025-12-31) 1 commit
 - t7527: fix flaky fsmonitor event tests with retry logic

 Test fixup.

 Comments?
 source: <pull.2150.v2.git.git.1767226763360.gitgitgadget@gmail.com>


* en/fsck-snapshot-ref-state (2026-01-09) 1 commit
  (merged to 'next' on 2026-01-12 at d5dff1bba4)
 + fsck: snapshot default refs before object walk

 "git fsck" used inconsistent set of refs to show a confused
 warning, which has been corrected.

 Will merge to 'master'.
 source: <pull.2026.v3.git.1767980953134.gitgitgadget@gmail.com>


* cc/lop-filter-auto (2025-12-23) 9 commits
 - fetch-pack: wire up and enable auto filter logic
 - promisor-remote: keep advertised filter in memory
 - list-objects-filter-options: implement auto filter resolution
 - 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

 "auto filter" logic for large-object promisor remote.

 Comments?
 source: <20251223111113.47473-1-christian.couder@gmail.com>


* tt/receive-pack-oo-namespace-symref-fix (2025-12-27) 1 commit
 - receive-pack: fix crash on out-of-namespace symref

 "git receive-pack", when namespace is involved, segfaulted when a
 symbolic ref cross the namespace boundary.

 Comments?
 source: <pull.2144.git.git.1766850014289.gitgitgadget@gmail.com>


* sb/doc-worktree-prune-expire-improvement (2025-12-19) 2 commits
 - worktree: use 'prune' instead of 'expire' in help text
 - worktree: clarify --expire applies to missing worktrees

 The help text and the documentation for the "--expire" option of
 "git worktree [list|prune]" have been improved.

 Expecting a reroll.
 source: <pull.2135.v2.git.git.1766168169.gitgitgadget@gmail.com>


* js/symlink-windows (2026-01-09) 19 commits
 - mingw: special-case index entries for symlinks with buggy size
 - mingw: emulate `stat()` a little more faithfully
 - mingw: try to create symlinks without elevated permissions
 - mingw: add support for symlinks to directories
 - mingw: implement basic `symlink()` functionality (file symlinks only)
 - mingw: implement `readlink()`
 - mingw: allow `mingw_chdir()` to change to symlink-resolved directories
 - mingw: support renaming symlinks
 - mingw: handle symlinks to directories in `mingw_unlink()`
 - mingw: add symlink-specific error codes
 - mingw: change default of `core.symlinks` to false
 - mingw: factor out the retry logic
 - mingw: compute the correct size for symlinks in `mingw_lstat()`
 - mingw: teach dirent about symlinks
 - mingw: let `mingw_lstat()` error early upon problems with reparse points
 - mingw: drop the separate `do_lstat()` function
 - mingw: implement `stat()` with symlink support
 - mingw: don't call `GetFileAttributes()` twice in `mingw_lstat()`
 - Merge branch 'js/prep-symlink-windows' into js/symlink-windows
 (this branch uses js/prep-symlink-windows.)

 Upstream symbolic link support on Windows from Git-for-Windows.

 Expecting a reroll.
 cf. <5fe64b77-d10b-b66e-8622-14bec1e96f4a@gmx.de>
 cf. <14388349-d1b5-fc8f-b6c7-4a7b43e64494@gmx.de>
 cf. <704e952d-7924-00ce-b8b0-ad355e659335@gmx.de>
 source: <pull.2018.v2.git.1767989115.gitgitgadget@gmail.com>


* pc/lockfile-pid (2026-01-07) 1 commit
 - lockfile: add PID file for debugging stale locks

 Allow recording process ID of the process that holds the lock next
 to a lockfile for diagnosis.

 Comments?
 source: <pull.2011.v4.git.1767804355831.gitgitgadget@gmail.com>


* ps/read-object-info-improvements (2026-01-12) 8 commits
  (merged to 'next' on 2026-01-14 at e84be1a7bc)
 + packfile: drop repository parameter from `packed_object_info()`
 + packfile: skip unpacking object header for disk size requests
 + packfile: disentangle return value of `packed_object_info()`
 + packfile: always populate pack-specific info when reading object info
 + packfile: extend `is_delta` field to allow for "unknown" state
 + packfile: always declare object info to be OI_PACKED
 + object-file: always set OI_LOOSE when reading object info
 + Merge branch 'jc/object-read-stream-fix' into ps/read-object-info-improvements
 (this branch is used by ps/odb-for-each-object.)

 The object-info API has been cleaned up.

 Will merge to 'master'.
 source: <20260112-b4-pks-odb-read-object-info-improvements-v5-0-9a6124e95bf2@pks.im>


* tb/macos-iconv-workarounds (2026-01-12) 2 commits
  (merged to 'next' on 2026-01-13 at f2e51d72b8)
 + utf8.c: enable workaround for iconv under macOS 14/15
 + utf8.c: prepare workaround for iconv under macOS 14/15

 The iconv library on macOS fails to correctly handle stateful
 ISO/IEC 2022 encoded strings.  Work it around instead of replacing
 it wholesale from homebrew.

 Will merge to 'master'.
 source: <20260112162553.774051-1-tboegi@web.de>


* js/prep-symlink-windows (2026-01-09) 6 commits
  (merged to 'next' on 2026-01-14 at d05f3a8ea5)
 + trim_last_path_component(): avoid hard-coding the directory separator
 + strbuf_readlink(): support link targets that exceed 2*PATH_MAX
 + strbuf_readlink(): avoid calling `readlink()` twice in corner-cases
 + init: do parse _all_ core.* settings early
 + mingw: do resolve symlinks in `getcwd()`
 + Merge branch 'js/test-symlink-windows' into js/prep-symlink-windows
 (this branch is used by js/symlink-windows.)

 Further preparation to upstream symbolic link support on Windows.

 Will merge to 'master'.
 source: <pull.2017.v2.git.1767989109.gitgitgadget@gmail.com>


* ap/http-probe-rpc-use-auth (2026-01-14) 1 commit
 - remote-curl: use auth for probe_rpc() requests too

 HTTP transport failed to authenticate in some code pahts, which has
 been corrected.

 Will merge to 'next'?
 source: <20260114163619.614297-2-aplattner@nvidia.com>


* ps/packfile-store-in-odb-source (2026-01-09) 12 commits
  (merged to 'next' on 2026-01-14 at f375c8e347)
 + packfile: move MIDX into packfile store
 + packfile: refactor `find_pack_entry()` to work on the packfile store
 + packfile: inline `find_kept_pack_entry()`
 + packfile: only prepare owning store in `packfile_store_prepare()`
 + packfile: only prepare owning store in `packfile_store_get_packs()`
 + packfile: move packfile store into object source
 + packfile: refactor misleading code when unusing pack windows
 + packfile: refactor kept-pack cache to work with packfile stores
 + packfile: pass source to `prepare_pack()`
 + packfile: create store via its owning source
 + Merge branch 'ps/odb-misc-fixes' into ps/packfile-store-in-odb-source
 + Merge branch 'ps/object-read-stream' into ps/packfile-store-in-odb-source
 (this branch is used by ps/odb-for-each-object.)

 The packfile_store data structure is moved from object store to odb
 source.

 Will merge to 'master'.
 source: <20260109-b4-pks-pack-store-via-source-v3-0-877fd7b7bf81@pks.im>


* lo/repo-info-keys (2026-01-09) 3 commits
 - repo: add new flag --keys to git-repo-info
 - repo: add a default output format to enum output_format
 - Merge branch 'lo/repo-struct-z' into lo/repo-info-keys

 "git repo info" learns "--keys" action to list known keys.

 Expecting a (hopefully small and final) reroll?
 cf. <12814829.O9o76ZdvQC@piment-oiseau>
 source: <20251207190532.67107-1-lucasseikioshiro@gmail.com>


* sb/doc-update-ref-markup-fix (2025-12-08) 1 commit
 - doc: fix `update-ref` `symref-create` formatting

 Doc mark-up fix.

 Will merget to 'next'.
 source: <pull.2123.git.git.1765261419802.gitgitgadget@gmail.com>


* tb/incremental-midx-part-3.2 (2026-01-14) 19 commits
 - midx: enable reachability bitmaps during MIDX compaction
 - midx: implement MIDX compaction
 - t/helper/test-read-midx.c: plug memory leak when selecting layer
 - midx-write.c: factor fanout layering from `compute_sorted_entries()`
 - midx-write.c: enumerate `pack_int_id` values directly
 - midx-write.c: extract `fill_pack_from_midx()`
 - midx-write.c: introduce `midx_pack_perm()` helper
 - git-compat-util.h: introduce `u32_add()`
 - midx: do not require packs to be sorted in lexicographic order
 - midx-write.c: introduce `struct write_midx_opts`
 - midx-write.c: don't use `pack_perm` when assigning `bitmap_pos`
 - t/t5319-multi-pack-index.sh: fix copy-and-paste error in t5319.39
 - git-multi-pack-index(1): align SYNOPSIS with 'git multi-pack-index -h'
 - git-multi-pack-index(1): remove non-existent incompatibility
 - builtin/multi-pack-index.c: make '--progress' a common option
 - midx: introduce `midx_get_checksum_hex()`
 - midx: rename `get_midx_checksum()` to `midx_get_checksum_hash()`
 - midx: mark `get_midx_checksum()` arguments as const
 - Merge branch 'tb/midx-write-corrupt-checksum-fix' into tb/incremental-midx-part-3.2
 (this branch uses tb/midx-write-corrupt-checksum-fix.)

 Further work on incremental repacking using MIDX/bitmap

 Comments?
 source: <cover.1768420450.git.me@ttaylorr.com>


* pw/replay-drop-empty (2025-12-18) 2 commits
 - replay: drop commits that become empty
 - Merge branch 'ps/history' into pw/replay-drop-empty
 (this branch uses ps/history.)

 "git replay" is taught to drop commits that become empty (not the
 ones that are empty in the original).

 On hold, until the base topic gains consensus and stabilizes.
 source: <375adc4e941f3bb22a2b12ee26a083951ed724dd.1766076625.git.phillip.wood@dunelm.org.uk>


* bc/sha1-256-interop-02 (2025-11-17) 15 commits
 - object-file-convert: always make sure object ID algo is valid
 - rust: add a small wrapper around the hashfile code
 - rust: add a new binary object map format
 - rust: add functionality to hash an object
 - rust: add a build.rs script for tests
 - hash: expose hash context functions to Rust
 - write-or-die: add an fsync component for the object map
 - csum-file: define hashwrite's count as a uint32_t
 - rust: add additional helpers for ObjectID
 - hash: add a function to look up hash algo structs
 - rust: add a hash algorithm abstraction
 - rust: add a ObjectID struct
 - hash: use uint32_t for object_id algorithm
 - conversion: don't crash when no destination algo
 - repository: require Rust support for interoperability

 The code to maintain mapping between object names in multiple hash
 functions is being added, written in Rust.
 source: <20251117221621.2863243-1-sandals@crustytoothpaste.net>


* je/doc-reset (2026-01-05) 4 commits
  (merged to 'next' on 2026-01-12 at 44b4f99803)
 + doc: git-reset: clarify `git reset <pathspec>`
 + doc: git-reset: clarify `git reset [mode]`
 + doc: git-reset: clarify intro
 + doc: git-reset: reorder the forms

 Documentation updates.

 Will merge to 'master'.
 source: <cover.1767649692.git.ben.knoble+github@gmail.com>


* ps/history (2026-01-13) 9 commits
 - builtin/history: implement "reword" subcommand
 - builtin: add new "history" command
 - wt-status: provide function to expose status for trees
 - replay: support updating detached HEAD
 - replay: support empty commit ranges
 - replay: small set of cleanups
 - builtin/replay: move core logic into "libgit.a"
 - builtin/replay: extract core logic to replay revisions
 - Merge branch 'kh/replay-invalid-onto-advance' into ps/history
 (this branch is used by pw/replay-drop-empty.)

 "git history" history rewriting UI.

 Will merge to 'next'?
 source: <20260113-b4-pks-history-builtin-v11-0-e74ebfa2652d@pks.im>


* ar/submodule-gitdir-tweak (2026-01-12) 11 commits
 - submodule: detect conflicts with existing gitdir configs
 - submodule: hash the submodule name for the gitdir path
 - submodule: fix case-folding gitdir filesystem collisions
 - submodule--helper: fix filesystem collisions by encoding gitdir paths
 - builtin/credential-store: move is_rfc3986_unreserved to url.[ch]
 - submodule--helper: add gitdir migration command
 - submodule: allow runtime enabling extensions.submodulePathConfig
 - submodule: introduce extensions.submodulePathConfig
 - builtin/submodule--helper: add gitdir command
 - submodule: always validate gitdirs inside submodule_name_to_gitdir
 - submodule--helper: use submodule_name_to_gitdir in add_submodule

 Avoid local submodule repository directory paths overlapping with
 each other by encoding submodule names before using them as path
 components.

 Will merge to 'next'?
 source: <20260112184632.1334495-1-adrian.ratiu@collabora.com>

--------------------------------------------------
[Discarded]

* wm/complete-git-short-opts (2025-11-26) 1 commit
 - completion: complete "git -<TAB>" with short options

 The command line completion script (in contrib/) learned to
 complete "git -<TAB>" to give single-letter options like "-C".

 We do not complete single-letter options themselves.
 cf. <xmqqo6onjfwl.fsf@gitster.g>
 source: <pull.2100.v2.git.git.1764174391776.gitgitgadget@gmail.com>

Re: What's cooking in git.git (Jan 2026, #05)

[Elijah Newren]

On Thu, Jan 15, 2026 at 10:59 AM Junio C Hamano <gitster@pobox.com> wrote:

> * ac/sparse-checkout-string-list-cleanup (2026-01-15) 1 commit
>  - sparse-checkout: optimize string_list construction
>
>  Code clean-up.
>
>  Will merge to 'next'.
>  source: <20260115130935.93526-1-amishhhaaaa@gmail.com>

Shouldn't it restore the string_list_remove_duplicates() calls first?
(See 20260115200903.GB1053259@coredump.intra.peff.net and
fc14e0e5-93bc-4805-a20d-d2aa4eb87ddb@web.de )

> * pw/replay-drop-empty (2025-12-18) 2 commits
>  - replay: drop commits that become empty
>  - Merge branch 'ps/history' into pw/replay-drop-empty
>  (this branch uses ps/history.)
>
>  "git replay" is taught to drop commits that become empty (not the
>  ones that are empty in the original).
>
>  On hold, until the base topic gains consensus and stabilizes.
>  source: <375adc4e941f3bb22a2b12ee26a083951ed724dd.1766076625.git.phillip.wood@dunelm.org.uk>

I think the base topic has done so now (as I'll note below), so this
should be ready to advance.

> * ps/history (2026-01-13) 9 commits
>  - builtin/history: implement "reword" subcommand
>  - builtin: add new "history" command
>  - wt-status: provide function to expose status for trees
>  - replay: support updating detached HEAD
>  - replay: support empty commit ranges
>  - replay: small set of cleanups
>  - builtin/replay: move core logic into "libgit.a"
>  - builtin/replay: extract core logic to replay revisions
>  - Merge branch 'kh/replay-invalid-onto-advance' into ps/history
>  (this branch is used by pw/replay-drop-empty.)
>
>  "git history" history rewriting UI.
>
>  Will merge to 'next'?
>  source: <20260113-b4-pks-history-builtin-v11-0-e74ebfa2652d@pks.im>

Yes, I think it's ready.

Re: What's cooking in git.git (Jan 2026, #05)

[Junio C Hamano]

Elijah Newren <newren@gmail.com> writes:

> On Thu, Jan 15, 2026 at 10:59 AM Junio C Hamano <gitster@pobox.com> wrote:
>
>> * ac/sparse-checkout-string-list-cleanup (2026-01-15) 1 commit
>>  - sparse-checkout: optimize string_list construction
>>
>>  Code clean-up.
>>
>>  Will merge to 'next'.
>> ...
>
> Shouldn't it restore the string_list_remove_duplicates() calls first?
> (See 20260115200903.GB1053259@coredump.intra.peff.net and
> fc14e0e5-93bc-4805-a20d-d2aa4eb87ddb@web.de )

Yes, my mistake.  The draft for the next issue of "What's cooking"
report has it corrected, almost immediately after I sent out the one
you are responding to.  Thanks for confirming.

>> * pw/replay-drop-empty (2025-12-18) 2 commits
>>  - replay: drop commits that become empty
>>  - Merge branch 'ps/history' into pw/replay-drop-empty
>>  (this branch uses ps/history.)
>>
>>  "git replay" is taught to drop commits that become empty (not the
>>  ones that are empty in the original).
>>
>>  On hold, until the base topic gains consensus and stabilizes.
>>  source: <375adc4e941f3bb22a2b12ee26a083951ed724dd.1766076625.git.phillip.wood@dunelm.org.uk>
>
> I think the base topic has done so now (as I'll note below), so this
> should be ready to advance.

THis has been blocked by ps/history for way too long.  I think we
can finally move them now, which means they are good topics for the
next cycle.

>> * ps/history (2026-01-13) 9 commits
>>  - builtin/history: implement "reword" subcommand
>>  - builtin: add new "history" command
>>  - wt-status: provide function to expose status for trees
>>  - replay: support updating detached HEAD
>>  - replay: support empty commit ranges
>>  - replay: small set of cleanups
>>  - builtin/replay: move core logic into "libgit.a"
>>  - builtin/replay: extract core logic to replay revisions
>>  - Merge branch 'kh/replay-invalid-onto-advance' into ps/history
>>  (this branch is used by pw/replay-drop-empty.)
>>
>>  "git history" history rewriting UI.
>>
>>  Will merge to 'next'?
>>  source: <20260113-b4-pks-history-builtin-v11-0-e74ebfa2652d@pks.im>
>
> Yes, I think it's ready.

Thanks.

Re: What's cooking in git.git (Jan 2026, #05)

[Yee Cheng Chin]

> * yc/histogram-hunk-shift-fix (2025-12-06) 1 commit
> - xdiff: re-diff shifted change groups when using histogram algorithm
>
> The final clean-up phase of the diff output could turn the result of
> histogram diff algorithm suboptimal, which has been corrected.
>
> Will discard. Has been waiting for further comments for too long.
> source:<pull.2120.git.git.1765054287938.gitgitgadget@gmail.com>

Hi, I'm the author for this patch. I'm still pretty new to Git
contribution, but what kind of comments are you looking for when
deciding on a patch? I noticed that my patch didn't receive any
comments, but it was essentially a bug fix for an occasional
suboptimal histogram diff result. I would imagine most people would
not have much to say given that it was not a new feature or introduced
any breaking changes.

Re: What's cooking in git.git (Jan 2026, #05)

[D. Ben Knoble]

On Sun, Jan 18, 2026 at 8:43 AM Yee Cheng Chin <ychin.macvim@gmail.com> wrote:
>
> > * yc/histogram-hunk-shift-fix (2025-12-06) 1 commit
> > - xdiff: re-diff shifted change groups when using histogram algorithm
> >
> > The final clean-up phase of the diff output could turn the result of
> > histogram diff algorithm suboptimal, which has been corrected.
> >
> > Will discard. Has been waiting for further comments for too long.
> > source:<pull.2120.git.git.1765054287938.gitgitgadget@gmail.com>
>
> Hi, I'm the author for this patch. I'm still pretty new to Git
> contribution, but what kind of comments are you looking for when
> deciding on a patch? I noticed that my patch didn't receive any
> comments, but it was essentially a bug fix for an occasional
> suboptimal histogram diff result. I would imagine most people would
> not have much to say given that it was not a new feature or introduced
> any breaking changes.

I just gave it another read and, while I can't comment on the xdiff
source changes, I find the proposed log message and test cases clear
(and demonstrate clear benefit).

I also appreciated the analysis of occurrence, which to me suggests
the performance cost is negligible.

Thanks.

-- 
D. Ben Knoble

Re: What's cooking in git.git (Jan 2026, #05)

[Aaron Plattner]

On 1/15/26 10:44 AM, Junio C Hamano wrote:
> * ap/http-probe-rpc-use-auth (2026-01-14) 1 commit
>   - remote-curl: use auth for probe_rpc() requests too
> 
>   HTTP transport failed to authenticate in some code pahts, which has
>   been corrected.
> 
>   Will merge to 'next'?
>   source: <20260114163619.614297-2-aplattner@nvidia.com>

Yes please.