git/meson.build, branch jch

Merge branch 'js/parseopt-subcommand-autocorrection' into jch

2026-04-17T04:27:20Z

The parse-options library learned to auto-correct misspelled subcommand names. * js/parseopt-subcommand-autocorrection: doc: document autocorrect API parseopt: add tests for subcommand autocorrection parseopt: enable subcommand autocorrection for git-remote and git-notes parseopt: autocorrect mistyped subcommands autocorrect: provide config resolution API autocorrect: rename AUTOCORRECT_SHOW to AUTOCORRECT_HINT autocorrect: use mode and delay instead of magic numbers help: move tty check for autocorrection to autocorrect.c help: make autocorrect handling reusable parseopt: extract subcommand handling from parse_options_step()

Merge branch 'bc/rust-by-default' into jch

2026-04-17T04:27:19Z

Rust support is enabled by default (but still allows opting out) in some future version of Git. * bc/rust-by-default: Enable Rust by default Linux: link against libdl ci: install cargo on Alpine docs: update version with default Rust support

Merge branch 'ar/parallel-hooks' into jch

2026-04-17T04:27:18Z

* ar/parallel-hooks: t1800: test SIGPIPE with parallel hooks hook: allow hook.jobs=-1 to use all available CPU cores hook: add hook..enabled switch hook: move is_known_hook() to hook.c for wider use hook: warn when hook..jobs is set hook: add per-event jobs config hook: add -j/--jobs option to git hook run hook: mark non-parallelizable hooks hook: allow pre-push parallel execution hook: allow parallel hook execution hook: parse the hook.jobs config config: add a repo_config_get_uint() helper repository: fix repo_init() memleak due to missing _clear()

hook: move is_known_hook() to hook.c for wider use

2026-04-10T14:58:54Z

Move is_known_hook() from builtin/hook.c (static) into hook.c and export it via hook.h so it can be reused. Make it return bool and the iterator `h` for clarity (iterate hooks). Both meson.build and the Makefile are updated to reflect that the header is now used by libgit, not the builtin sources. The next commit will use this to reject hook friendly-names that collide with known event names. Co-authored-by: Patrick Steinhardt Signed-off-by: Adrian Ratiu Signed-off-by: Junio C Hamano

Enable Rust by default

2026-04-10T00:25:36Z

Our breaking changes document says that we'll enable Rust by default in Git 2.54. Adjust the Makefile to switch the option from WITH_RUST to NO_RUST to enable it by default and update the help text accordingly. Similarly, for Meson, enable the option by default and do not automatically disable it if Cargo is missing, since the goal is to help users find where they are likely to have problems in the future. Update our CI tests to swap out the single Linux job with Rust to a single job without, both for Makefile and Meson. Similarly, update the Windows Makefile job to not use Rust, while the Meson job (which does not build with ci/lib.sh) will default to having it enabled. Move the check for Cargo in the Meson build because it is no longer needed in the main script. Signed-off-by: brian m. carlson Signed-off-by: Junio C Hamano

Revert "compat/posix: introduce writev(3p) wrapper"

2026-04-09T21:48:24Z

This reverts commit 3b9b2c2a29a1d529ca9884fa0a6529f6e2496abe; let's not use writev() for now.

Merge branch 'ps/build-tweaks'

2026-03-27T18:00:01Z

Tweak the build infrastructure by moving tools around. * ps/build-tweaks: meson: precompile "git-compat-util.h" meson: compile compatibility sources separately git-compat-util.h: move warning infra to prepare for PCHs builds: move build scripts into "tools/" contrib: move "update-unicode.sh" script into "tools/" contrib: move "coverage-diff.sh" script into "tools/" contrib: move "coccinelle/" directory into "tools/" Introduce new "tools/" directory

Merge branch 'ps/upload-pack-buffer-more-writes'

2026-03-24T19:31:34Z

Reduce system overhead "git upload-pack" spends on relaying "git pack-objects" output to the "git fetch" running on the other end of the connection. * ps/upload-pack-buffer-more-writes: builtin/pack-objects: reduce lock contention when writing packfile data csum-file: drop `hashfd_throughput()` csum-file: introduce `hashfd_ext()` sideband: use writev(3p) to send pktlines wrapper: introduce writev(3p) wrappers compat/posix: introduce writev(3p) wrapper upload-pack: reduce lock contention when writing packfile data upload-pack: prefer flushing data over sending keepalive upload-pack: adapt keepalives based on buffering upload-pack: fix debug statement when flushing packfile data

meson: precompile "git-compat-util.h"

2026-03-19T13:40:09Z

Every compilation unit in Git is expected to include "git-compat-util.h" first, either directly or indirectly via "builtin.h". This header papers over differences between platforms so that we can expect the typical POSIX functions to exist. Furthermore, it provides functionality that we end up using everywhere. This header is thus quite heavy as a consequence. Preprocessing it as a standalone unit via `clang -E git-compat-util.h` yields over 23,000 lines of code overall. Naturally, it takes quite some time to compile all of this. Luckily, this is exactly the kind of use case that precompiled headers aim to solve: instead of recompiling it every single time, we compile it once and then link the result into the executable. If include guards are set up properly it means that the file won't need to be reprocessed. Set up such a precompiled header for "git-compat-util.h" and wire it up via Meson. This causes Meson to implicitly include the precompiled header in all compilation units. With GCC and Clang for example this is done via the "-include" statement [1]. This leads to a significant speedup when performing full builds: Benchmark 1: ninja (rev = HEAD~) Time (mean ± σ): 14.467 s ± 0.126 s [User: 248.133 s, System: 31.298 s] Range (min … max): 14.195 s … 14.633 s 10 runs Benchmark 2: ninja (rev = HEAD) Time (mean ± σ): 10.307 s ± 0.111 s [User: 173.290 s, System: 23.998 s] Range (min … max): 10.030 s … 10.433 s 10 runs Summary ninja (rev = HEAD) ran 1.40 ± 0.02 times faster than ninja (rev = HEAD~) [1]: https://gcc.gnu.org/onlinedocs/gcc/Precompiled-Headers.html Signed-off-by: Patrick Steinhardt Signed-off-by: Junio C Hamano

meson: compile compatibility sources separately

2026-03-19T13:40:09Z

In the next commit we're about to introduce a precompiled header for "git-compat-util.h". The consequence of this change is that we'll implicitly include that header for every compilation unit that uses the precompiled headers. This is okay for our "normal" library sources and our builtins. But some of our compatibility sources do not include the header on purpose, and doing so would cause compilation errors. Prepare for this change by splitting out compatibility sources into their static library. Like this, we can selectively enable precompiled headers for the library sources. Signed-off-by: Patrick Steinhardt Signed-off-by: Junio C Hamano