[PATCH v7 00/13] Run hooks in parallel

Hello everyone,

This series enables running hook commands in parallel and is based on the latest master branch. It requires commit 2226ffaacd (run_processes_parallel(): fix order of sigpipe handling, 2026-04-08) from master.

v7 is a minor refresh which includes a new parallel test contributed by Jeff King to test the bugfix above which landed recently on master.

Branch is pushed to GitHub: https://github.com/10ne1/git/tree/dev/aratiu/parallel-hooks-v7

Successful CI run: https://github.com/10ne1/git/actions/runs/24234022244

Changes in v7:
* Apply Jeff's patch as the 13'th commit in this series, slightly
  rewording it and moving the test at Jeff's suggestion (Adrian)

Range-diff v6 -> v7:
 1:  b79b6d4d92 =  1:  c361429e4d repository: fix repo_init() memleak due to missing _clear()
 2:  04d70c5fe6 =  2:  96d11e8a82 config: add a repo_config_get_uint() helper
 3:  9d52e73211 =  3:  d7972c7557 hook: parse the hook.jobs config
 4:  fa52e229e6 =  4:  6fb33026da hook: allow parallel hook execution
 5:  255e87fe42 =  5:  d5d56c2753 hook: allow pre-push parallel execution
 6:  eb60a9effe =  6:  48584cf296 hook: mark non-parallelizable hooks
 7:  44eaa1b5eb =  7:  2606af97ad hook: add -j/--jobs option to git hook run
 8:  dcd7f91d96 =  8:  950f4dca9f hook: add per-event jobs config
 9:  7b1513b648 =  9:  4a9e0ec914 hook: warn when hook.<friendly-name>.jobs is set
10:  1a808c35c3 = 10:  aa1583ba65 hook: move is_known_hook() to hook.c for wider use
11:  a5d37a0ea1 = 11:  3f70f2c2bf hook: add hook.<event>.enabled switch
12:  136cd50cea = 12:  56e66c409d hook: allow hook.jobs=-1 to use all available CPU cores
 -:  ---------- > 13:  044996431a t1800: test SIGPIPE with parallel hooks

Adrian Ratiu (9):
  repository: fix repo_init() memleak due to missing _clear()
  config: add a repo_config_get_uint() helper
  hook: parse the hook.jobs config
  hook: allow pre-push parallel execution
  hook: add per-event jobs config
  hook: warn when hook.<friendly-name>.jobs is set
  hook: move is_known_hook() to hook.c for wider use
  hook: add hook.<event>.enabled switch
  hook: allow hook.jobs=-1 to use all available CPU cores

Emily Shaffer (3):
  hook: allow parallel hook execution
  hook: mark non-parallelizable hooks
  hook: add -j/--jobs option to git hook run

Jeff King (1):
  t1800: test SIGPIPE with parallel hooks

 Documentation/config/hook.adoc |  76 +++++
 Documentation/git-hook.adoc    |  23 +-
 Makefile                       |   2 +-
 builtin/am.c                   |   8 +-
 builtin/checkout.c             |  19 +-
 builtin/clone.c                |   6 +-
 builtin/hook.c                 |  46 ++-
 builtin/receive-pack.c         |   3 +-
 builtin/worktree.c             |   2 +-
 commit.c                       |   2 +-
 config.c                       |  28 ++
 config.h                       |  13 +
 hook.c                         | 286 +++++++++++++++-
 hook.h                         |  38 ++-
 meson.build                    |  24 +-
 parse.c                        |   9 +
 parse.h                        |   1 +
 repository.c                   |   3 +
 repository.h                   |  10 +
 t/t1800-hook.sh                | 584 ++++++++++++++++++++++++++++++++-
 transport.c                    |   6 +-
 21 files changed, 1119 insertions(+), 70 deletions(-)