What's cooking in git.git (Dec 2024, #11; Mon, 30)

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).

It has been a very slow week, and I expect this week will also be slow. Git 2.48-rc1 has been tagged. Hopefully we can have 2.48 final around the end of next week.

Extra testing the tip of 'master' before we actually tag it is as always very much appreciated.

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/

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

* jk/lsan-race-with-barrier (2024-12-30) 5 commits
  (merged to 'next' on 2024-12-30 at 3fc0e14928)
 + grep: work around LSan threading race with barrier
 + index-pack: work around LSan threading race with barrier
 + thread-utils: introduce optional barrier type
 + Revert "index-pack: spawn threads atomically"
 + test-lib: use individual lsan dir for --stress runs

 CI jobs that run threaded programs under LSan has been giving false
 positives from time to time, which has been worked around.

 Will merge to 'master'.
 source: <20241230042325.GA112439@coredump.intra.peff.net>

* ps/meson-weak-sha1-build (2024-12-30) 8 commits
 - meson: provide a summary of configured backends
 - meson: wire up unsafe SHA1 backend
 - meson: add missing dots for build options
 - meson: simplify conditions for HTTPS and SHA1 dependencies
 - meson: require SecurityFramework when it's used as SHA1 backend
 - meson: deduplicate access to SHA1/SHA256 backend options
 - meson: consistenlty spell 'CommonCrypto'
 - Merge branch 'ps/weak-sha1-for-tail-sum-fix' into ps/meson-weak-sha1-build
 (this branch uses ps/weak-sha1-for-tail-sum-fix.)

 meson-based build now supports the unsafe-sha1 build knob.

 Will merge to 'next'.
 source: <20241230-pks-meson-sha1-unsafe-v1-0-efb276e171f5@pks.im>

* ps/object-collision-check (2024-12-30) 1 commit
  (merged to 'next' on 2024-12-30 at e083ea3154)
 + object-file: fix race in object collision check

 CI jobs gave sporadic failures, which turns out that that the
 object finalization code was giving an error when it did not have
 to.

 Will merge to 'master'.
 source: <20241230-b4-pks-object-file-racy-collision-check-v1-1-11571294e60a@pks.im>

* ps/weak-sha1-for-tail-sum-fix (2024-12-30) 3 commits
  (merged to 'next' on 2024-12-30 at c24783e99d)
 + ci: exercise unsafe OpenSSL backend
 + builtin/fast-import: fix segfault with unsafe SHA1 backend
 + bulk-checkin: fix segfault with unsafe SHA1 backend
 (this branch is used by ps/meson-weak-sha1-build.)

 An earlier "csum-file checksum does not have to be computed with
 sha1dc" topic had a few code paths that had initialized an
 implementation of a hash function to be used by an unmatching hash
 by mistake, which have been corrected.

 Will merge to 'master'.
 source: <20241230-pks-meson-sha1-unsafe-v1-0-efb276e171f5@pks.im>

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

* ms/t7611-test-path-is-file (2024-12-27) 1 commit
  (merged to 'next' on 2024-12-28 at b08a0c8e23)
 + t7611: replace test -f with test_path_is* helpers

 Test modernization.
 
 source: <20241227105345.10184-1-meetsoni3017@gmail.com>

* ps/meson-test-wo-gitweb (2024-12-27) 3 commits
  (merged to 'next' on 2024-12-28 at 39938f41fd)
 + meson: enable auto-discovered "gitweb"
 + GIT-BUILD-OPTIONS: wire up NO_GITWEB option
 + GIT-BUILD-OPTIONS: sort variables alphabetically

 meson-based build without GitWeb failed the self tests.
 source: <20241227-b4-pks-meson-wo-gitweb-v1-0-14ca8515bb3b@pks.im>

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

* sk/strlen-returns-size_t (2024-12-26) 1 commit
 - date.c: Fix type missmatch warings from msvc

 Code clean-up.

 The remainder needs to be reviewed.
 source: <20241223110407.3308-3-soekkle@freenet.de>

* ps/more-sign-compare (2024-12-27) 10 commits
 - sign-compare: avoid comparing ptrdiff with an int/unsigned
 - commit-reach: use `size_t` to track indices when computing merge bases
 - shallow: fix -Wsign-compare warnings
 - builtin/log: fix remaining -Wsign-compare warnings
 - builtin/log: use `size_t` to track indices
 - commit-reach: use `size_t` to track indices in `get_reachable_subset()`
 - commit-reach: use `size_t` to track indices in `remove_redundant()`
 - commit-reach: fix type of `min_commit_date`
 - commit-reach: fix index used to loop through unsigned integer
 - prio-queue: fix type of `insertion_ctr`

 More -Wsign-compare fixes.

 Will merge to 'next'.
 cf. https://staticthinking.wordpress.com/2023/07/25/wsign-compare-is-garbage/
 source: <20241227-b4-pks-commit-reach-sign-compare-v1-0-07c59c2aa632@pks.im>

* as/long-option-help-i18n (2024-12-30) 1 commit
  (merged to 'next' on 2024-12-30 at 900c79808f)
 + parse-options: localize mark-up of placeholder text in the short help

 Tweak the help text used for the option value placeholders by
 parse-options API so that translations can customize the "<>"
 placeholder signal (e.g. "--option=<value>").

 Will cook in 'next'.
 source: <20241228114221.10351-4-ash@kambanaria.org>

* sk/maintenance-remote-prune (2024-12-28) 1 commit
 - maintenance: add prune-remote-refs task

 A new periodic maintenance task to run "git remote prune" has been
 introduced.

 Expecting a reroll.
 cf. <Z3JLdIG4C9D2-1ZT@pks.im>
 source: <pull.1838.v2.git.1735380461980.gitgitgadget@gmail.com>

* rs/reftable-realloc-errors (2024-12-28) 4 commits
  (merged to 'next' on 2024-12-30 at ebc9625a4c)
 + t-reftable-merged: handle realloc errors
 + reftable: handle realloc error in parse_names()
 + reftable: fix allocation count on realloc error
 + reftable: avoid leaks on realloc error

 The custom allocator code in the reftable library did not handle
 failing realloc() very well, which has been addressed.

 Will merge to 'master'?
 cf. <Z3JLdIG4C9D2-1ZT@pks.im>
 source: <f4677194-0a3a-4f07-b003-c0295b51c100@web.de>

* jc/show-index-h-update (2024-12-20) 1 commit
 - show-index: the short help should say the command reads from its input

 Doc and short-help text for "show-index" has been clarified to
 stress that the command reads its data from the standard input.

 Comments?
 source: <xmqqfrmidyhk.fsf@gitster.g>

* ps/the-repository (2024-12-18) 15 commits
 - match-trees: stop using `the_repository`
 - graph: stop using `the_repository`
 - add-interactive: stop using `the_repository`
 - tmp-objdir: stop using `the_repository`
 - resolve-undo: stop using `the_repository`
 - credential: stop using `the_repository`
 - mailinfo: stop using `the_repository`
 - diagnose: stop using `the_repository`
 - server-info: stop using `the_repository`
 - send-pack: stop using `the_repository`
 - serve: stop using `the_repository`
 - trace: stop using `the_repository`
 - pager: stop using `the_repository`
 - progress: stop using `the_repository`
 - Merge branch 'ps/build-sign-compare' into ps/the-repository

 More code paths have a repository passed through the callchain,
 instead of assuming the primary the_repository object.
 source: <20241217-pks-use-the-repository-conversion-v1-0-0dba48bcc239@pks.im>

* ps/build-meson-html (2024-12-27) 12 commits
 - Documentation: wire up sanity checks for Meson
 - t/Makefile: make "check-meson" work with Dash
 - meson: install static files for HTML documentation
 - meson: generate articles
 - Documentation: refactor "howto-index.sh" for out-of-tree builds
 - Documentation: refactor "api-index.sh" for out-of-tree builds
 - meson: generate user manual
 - Documentation: inline user-manual.conf
 - meson: generate HTML pages for all man page categories
 - meson: fix generation of merge tools
 - meson: properly wire up dependencies for our docs
 - meson: wire up support for AsciiDoctor

 The build procedure based on meson learned to generate HTML
 documention pages.

 Needs review. On hold.
 source: <20241227-b4-pks-meson-docs-v2-0-f61e63edbfa1@pks.im>

* jc/doc-attr-tree (2024-12-14) 1 commit
 - doc: give attr.tree a bit more visibility

 Make sure that "git --attr-source=X", GIT_ATTR_SOURCE, and
 attr.tree configuration variables appear at the same places in the
 documentation.

 On hold.
 cf. <20241216111112.GA2201417@coredump.intra.peff.net>
 source: <xmqq5xnladwi.fsf@gitster.g>

* ps/3.0-remote-deprecation (2024-12-12) 6 commits
 - remote: announce removal of "branches/" and "remotes/"
 - builtin/pack-redundant: remove subcommand with breaking changes
 - ci: repurpose "linux-gcc" job for deprecations
 - ci: merge linux-gcc-default into linux-gcc
 - Makefile: wire up build option for deprecated features
 - Merge branch 'ps/build' into ps/3.0-remote-deprecation

 Following the procedure we established to introduce breaking
 changes for Git 3.0, allow an early opt-in for removing support of
 $GIT_DIR/branches/ and $GIT_DIR/remotes/ directories to configure
 remotes.

 Needs review.
 source: <20241211-pks-remote-branches-deprecation-v1-0-1431e2369135@pks.im>

* cc/lop-remote (2024-12-07) 5 commits
 . doc: add technical design doc for large object promisors
 . promisor-remote: check advertised name or URL
 . Add 'promisor-remote' capability to protocol v2
 . strbuf: refactor strbuf_trim_trailing_ch()
 . version: refactor strbuf_sanitize()

 Expecting a reroll.
 cf. <CAP8UFD3bdEo1_bg+aX52xSGxmg9KfNrpiX+2LwUM-yDqjvfZbQ@mail.gmail.com>
 source: <20241206124248.160494-1-christian.couder@gmail.com>

* ds/backfill (2024-12-20) 6 commits
 - backfill: assume --sparse when sparse-checkout is enabled
 - backfill: add --sparse option
 - backfill: add --min-batch-size=<n> option
 - backfill: basic functionality and tests
 - backfill: add builtin boilerplate
 - Merge branch 'ds/path-walk-1' into ds/backfill
 (this branch uses ds/path-walk-1.)

 Lazy-loading missing files in a blobless clone on demand is costly
 as it tends to be one-blob-at-a-time.  "git backfill" is introduced
 to help bulk-download necessary files beforehand.

 Comments?
 source: <pull.1820.v2.git.1734712193.gitgitgadget@gmail.com>

* re/submodule-parse-opt (2024-12-11) 7 commits
  (merged to 'next' on 2024-12-21 at 9e65a56a63)
 + git-submodule.sh: rename some variables
 + git-submodule.sh: improve variables readability
 + git-submodule.sh: add some comments
 + git-submodule.sh: get rid of unused variable
 + git-submodule.sh: get rid of isnumber
 + git-submodule.sh: improve parsing of short options
 + git-submodule.sh: improve parsing of some long options

 "git submodule" learned various ways to spell the same option,
 e.g. "--branch=B" can be spelled "--branch B" or "-bB".

 Will cook in 'next'.
 source: <20241211063234.7610-1-royeldar0@gmail.com>

* tb/unsafe-hash-test (2024-11-21) 2 commits
 - t/helper/test-tool: implement sha1-unsafe helper
 - t/helper/test-sha1: prepare for an unsafe mode

 Preliminary addition to the test tool to allow a plain SHA-1 hash
 algorithm without collision protection.

 Comments?
 cf. <xmqqr073antj.fsf@gitster.g>
 source: <cover.1730833506.git.me@ttaylorr.com>

* tb/incremental-midx-part-2 (2024-11-20) 15 commits
 - midx: implement writing incremental MIDX bitmaps
 - pack-bitmap.c: use `ewah_or_iterator` for type bitmap iterators
 - pack-bitmap.c: keep track of each layer's type bitmaps
 - ewah: implement `struct ewah_or_iterator`
 - pack-bitmap.c: apply pseudo-merge commits with incremental MIDXs
 - pack-bitmap.c: compute disk-usage with incremental MIDXs
 - pack-bitmap.c: teach `rev-list --test-bitmap` about incremental MIDXs
 - pack-bitmap.c: support bitmap pack-reuse with incremental MIDXs
 - pack-bitmap.c: teach `show_objects_for_type()` about incremental MIDXs
 - pack-bitmap.c: teach `bitmap_for_commit()` about incremental MIDXs
 - pack-bitmap.c: open and store incremental bitmap layers
 - pack-revindex: prepare for incremental MIDX bitmaps
 - Documentation: describe incremental MIDX bitmaps
 - Merge branch 'tb/pseudo-merge-bitmap-fixes' into tb/incremental-midx-part-2
 - Merge branch 'tb/incremental-midx-part-1' into tb/incremental-midx-part-2

 Incrementally updating multi-pack index files.

 Needs review.
 source: <cover.1732054032.git.me@ttaylorr.com>

* ps/send-pack-unhide-error-in-atomic-push (2024-11-14) 2 commits
 - transport: don't ignore git-receive-pack(1) exit code on atomic push
 - t5504: modernize test by moving heredocs into test bodies

 "git push --atomic --porcelain" used to ignore failures from the
 other side, losing the error status from the child process, which
 has been corrected.

 Needs to see if competing parallel topic needs to replace this one.
 source: <20241113-pks-push-atomic-respect-exit-code-v1-0-7965f01e7f4e@pks.im>

* jc/move-is-bare-repository-cfg-variable-to-repo (2024-11-07) 3 commits
 . repository: BUG when is_bare_cfg is not initialized
 . setup: initialize is_bare_cfg
 . git: remove is_bare_repository_cfg global variable

 Code rewrite to turn the is_bare_repository_cfg global variable
 into a member in the the_repo singleton repository object.

 Waiting for response to reviews.
 cf. <xmqqy116xvr3.fsf@gitster.g>
 Seems to break t0021-conversion on Windows.
 cf. https://lore.kernel.org/git/xmqqzfl1hl52.fsf@gitster.g/
 source: <pull.1826.git.git.1730926082.gitgitgadget@gmail.com>

* ds/name-hash-tweaks (2024-12-20) 8 commits
 - pack-objects: add third name hash version
 - pack-objects: prevent name hash version change
 - test-tool: add helper for name-hash values
 - p5313: add size comparison test
 - pack-objects: add GIT_TEST_NAME_HASH_VERSION
 - repack: add --name-hash-version option
 - pack-objects: add --name-hash-version option
 - pack-objects: create new name-hash function version

 "git pack-objects" and its wrapper "git repack" learned an option
 to use an alternative path-hash function to improve delta-base
 selection to produce a packfile with deeper history than window
 size.

 Comments?
 source: <pull.1823.v3.git.1734715194.gitgitgadget@gmail.com>

* ds/path-walk-1 (2024-12-20) 7 commits
 - path-walk: reorder object visits
 - path-walk: mark trees and blobs as UNINTERESTING
 - path-walk: visit tags and cached objects
 - path-walk: allow consumer to specify object types
 - t6601: add helper for testing path-walk API
 - test-lib-functions: add test_cmp_sorted
 - path-walk: introduce an object walk by path
 (this branch is used by ds/backfill.)

 Introduce a new API to visit objects in batches based on a common
 path, or by type.

 Comments?
 source: <pull.1818.v4.git.1734711675.gitgitgadget@gmail.com>

* km/config-remote-by-name (2024-10-21) 1 commit
 - config: support remote name in includeIf.hasconfig condition

 Support conditionally including configuration by remote name, instead
 of just URL.

 Will discard?
 source: <20241020173216.40852-2-ken@kmatsui.me>

* y5/diff-pager (2024-10-21) 1 commit
 - diff: setup pager only before diff contents truly ready

 Delay setting up the pager in 'git diff' until after the diff contents
 itself is fully prepared.

 Will discard?
 source: <pull.1817.git.git.1729370390416.gitgitgadget@gmail.com>

* ej/cat-file-remote-object-info (2024-11-25) 6 commits
 - cat-file: add remote-object-info to batch-command
 - transport: add client support for object-info
 - serve: advertise object-info feature
 - fetch-pack: move fetch initialization
 - fetch-pack: refactor packet writing
 - cat-file: add declaration of variable i inside its for loop

 "git cat-file --batch" and friends can optionally ask a remote
 server about objects it does not have.

 Expecting a reroll.
 cf. <Z0RIrKwUnaWWm_gJ@pks.im>
 source: <20241125053616.25170-1-eric.peijian@gmail.com>

* js/libgit-rust (2024-10-16) 5 commits
 - Makefile: add option to build and test libgit-rs and libgit-rs-sys
 - libgit: add higher-level libgit crate
 - libgit-sys: also export some config_set functions
 - libgit-sys: introduce Rust wrapper for libgit.a
 - common-main: split init and exit code into new files

 A rust binding to libgit.a functions has been introduced.

 Will discard?
 source: <cover.1729032373.git.steadmon@google.com>