hook: add 'run' subcommand

In order to enable hooks to be run as an external process, by a
standalone Git command, or by tools which wrap Git, provide an external
means to run all configured hook commands for a given hook event.

Most of our hooks require more complex functionality than this, but
let's start with the bare minimum required to support our simplest
hooks.

In terms of implementation the usage_with_options() and "goto usage"
pattern here mirrors that of
builtin/{commit-graph,multi-pack-index}.c.

Some of the implementation here, such as a function being named
run_hooks_opt() when it's tasked with running one hook, to using the
run_processes_parallel_tr2() API to run with jobs=1 is somewhere
between a bit odd and and an overkill for the current features of this
"hook run" command and the hook.[ch] API.

This code will eventually be able to run multiple hooks declared in
config in parallel, by starting out with these names and APIs we
reduce the later churn of renaming functions, switching from the
run_command() to run_processes_parallel_tr2() API etc.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Acked-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
11 files changed
tree: 549a837a3969d4c60c1bf5b03919d56a56211b66
  1. .github/
  2. block-sha1/
  3. builtin/
  4. ci/
  5. compat/
  6. contrib/
  7. Documentation/
  8. ewah/
  9. git-gui/
  10. gitk-git/
  11. gitweb/
  12. mergetools/
  13. negotiator/
  14. perl/
  15. po/
  16. ppc/
  17. refs/
  18. reftable/
  19. sha1dc/
  20. sha256/
  21. t/
  22. templates/
  23. trace2/
  24. xdiff/
  25. .cirrus.yml
  26. .clang-format
  27. .editorconfig
  28. .gitattributes
  29. .gitignore
  30. .gitmodules
  31. .mailmap
  32. .tsan-suppressions
  33. abspath.c
  34. aclocal.m4
  35. add-interactive.c
  36. add-interactive.h
  37. add-patch.c
  38. advice.c
  39. advice.h
  40. alias.c
  41. alias.h
  42. alloc.c
  43. alloc.h
  44. apply.c
  45. apply.h
  46. archive-tar.c
  47. archive-zip.c
  48. archive.c
  49. archive.h
  50. attr.c
  51. attr.h
  52. banned.h
  53. base85.c
  54. bisect.c
  55. bisect.h
  56. blame.c
  57. blame.h
  58. blob.c
  59. blob.h
  60. bloom.c
  61. bloom.h
  62. branch.c
  63. branch.h
  64. builtin.h
  65. bulk-checkin.c
  66. bulk-checkin.h
  67. bundle.c
  68. bundle.h
  69. cache-tree.c
  70. cache-tree.h
  71. cache.h
  72. cbtree.c
  73. cbtree.h
  74. chdir-notify.c
  75. chdir-notify.h
  76. check-builtins.sh
  77. checkout.c
  78. checkout.h
  79. chunk-format.c
  80. chunk-format.h
  81. CODE_OF_CONDUCT.md
  82. color.c
  83. color.h
  84. column.c
  85. column.h
  86. combine-diff.c
  87. command-list.txt
  88. commit-graph.c
  89. commit-graph.h
  90. commit-reach.c
  91. commit-reach.h
  92. commit-slab-decl.h
  93. commit-slab-impl.h
  94. commit-slab.h
  95. commit.c
  96. commit.h
  97. common-main.c
  98. config.c
  99. config.h
  100. config.mak.dev
  101. config.mak.in
  102. config.mak.uname
  103. configure.ac
  104. connect.c
  105. connect.h
  106. connected.c
  107. connected.h
  108. convert.c
  109. convert.h
  110. copy.c
  111. COPYING
  112. credential.c
  113. credential.h
  114. csum-file.c
  115. csum-file.h
  116. ctype.c
  117. daemon.c
  118. date.c
  119. decorate.c
  120. decorate.h
  121. delta-islands.c
  122. delta-islands.h
  123. delta.h
  124. detect-compiler
  125. diff-delta.c
  126. diff-lib.c
  127. diff-merges.c
  128. diff-merges.h
  129. diff-no-index.c
  130. diff.c
  131. diff.h
  132. diffcore-break.c
  133. diffcore-delta.c
  134. diffcore-order.c
  135. diffcore-pickaxe.c
  136. diffcore-rename.c
  137. diffcore-rotate.c
  138. diffcore.h
  139. dir-iterator.c
  140. dir-iterator.h
  141. dir.c
  142. dir.h
  143. editor.c
  144. entry.c
  145. entry.h
  146. environment.c
  147. environment.h
  148. exec-cmd.c
  149. exec-cmd.h
  150. fetch-negotiator.c
  151. fetch-negotiator.h
  152. fetch-pack.c
  153. fetch-pack.h
  154. fmt-merge-msg.c
  155. fmt-merge-msg.h
  156. fsck.c
  157. fsck.h
  158. fsmonitor.c
  159. fsmonitor.h
  160. fuzz-commit-graph.c
  161. fuzz-pack-headers.c
  162. fuzz-pack-idx.c
  163. generate-cmdlist.sh
  164. generate-configlist.sh
  165. generate-hooklist.sh
  166. gettext.c
  167. gettext.h
  168. git-add--interactive.perl
  169. git-archimport.perl
  170. git-bisect.sh
  171. git-compat-util.h
  172. git-curl-compat.h
  173. git-cvsexportcommit.perl
  174. git-cvsimport.perl
  175. git-cvsserver.perl
  176. git-difftool--helper.sh
  177. git-filter-branch.sh
  178. git-instaweb.sh
  179. git-merge-octopus.sh
  180. git-merge-one-file.sh
  181. git-merge-resolve.sh
  182. git-mergetool--lib.sh
  183. git-mergetool.sh
  184. git-p4.py
  185. git-quiltimport.sh
  186. git-request-pull.sh
  187. git-send-email.perl
  188. git-sh-i18n.sh
  189. git-sh-setup.sh
  190. git-submodule.sh
  191. git-svn.perl
  192. GIT-VERSION-GEN
  193. git-web--browse.sh
  194. git.c
  195. git.rc
  196. gpg-interface.c
  197. gpg-interface.h
  198. graph.c
  199. graph.h
  200. grep.c
  201. grep.h
  202. hash-lookup.c
  203. hash-lookup.h
  204. hash.h
  205. hashmap.c
  206. hashmap.h
  207. help.c
  208. help.h
  209. hex.c
  210. hook.c
  211. hook.h
  212. http-backend.c
  213. http-fetch.c
  214. http-push.c
  215. http-walker.c
  216. http.c
  217. http.h
  218. ident.c
  219. imap-send.c
  220. INSTALL
  221. iterator.h
  222. json-writer.c
  223. json-writer.h
  224. khash.h
  225. kwset.c
  226. kwset.h
  227. levenshtein.c
  228. levenshtein.h
  229. LGPL-2.1
  230. line-log.c
  231. line-log.h
  232. line-range.c
  233. line-range.h
  234. linear-assignment.c
  235. linear-assignment.h
  236. list-objects-filter-options.c
  237. list-objects-filter-options.h
  238. list-objects-filter.c
  239. list-objects-filter.h
  240. list-objects.c
  241. list-objects.h
  242. list.h
  243. ll-merge.c
  244. ll-merge.h
  245. lockfile.c
  246. lockfile.h
  247. log-tree.c
  248. log-tree.h
  249. ls-refs.c
  250. ls-refs.h
  251. mailinfo.c
  252. mailinfo.h
  253. mailmap.c
  254. mailmap.h
  255. Makefile
  256. match-trees.c
  257. mem-pool.c
  258. mem-pool.h
  259. merge-blobs.c
  260. merge-blobs.h
  261. merge-ort-wrappers.c
  262. merge-ort-wrappers.h
  263. merge-ort.c
  264. merge-ort.h
  265. merge-recursive.c
  266. merge-recursive.h
  267. merge.c
  268. mergesort.c
  269. mergesort.h
  270. midx.c
  271. midx.h
  272. name-hash.c
  273. notes-cache.c
  274. notes-cache.h
  275. notes-merge.c
  276. notes-merge.h
  277. notes-utils.c
  278. notes-utils.h
  279. notes.c
  280. notes.h
  281. object-file.c
  282. object-name.c
  283. object-store.h
  284. object.c
  285. object.h
  286. oid-array.c
  287. oid-array.h
  288. oidmap.c
  289. oidmap.h
  290. oidset.c
  291. oidset.h
  292. oidtree.c
  293. oidtree.h
  294. pack-bitmap-write.c
  295. pack-bitmap.c
  296. pack-bitmap.h
  297. pack-check.c
  298. pack-objects.c
  299. pack-objects.h
  300. pack-revindex.c
  301. pack-revindex.h
  302. pack-write.c
  303. pack.h
  304. packfile.c
  305. packfile.h
  306. pager.c
  307. parallel-checkout.c
  308. parallel-checkout.h
  309. parse-options-cb.c
  310. parse-options.c
  311. parse-options.h
  312. patch-delta.c
  313. patch-ids.c
  314. patch-ids.h
  315. path.c
  316. path.h
  317. pathspec.c
  318. pathspec.h
  319. pkt-line.c
  320. pkt-line.h
  321. preload-index.c
  322. pretty.c
  323. pretty.h
  324. prio-queue.c
  325. prio-queue.h
  326. progress.c
  327. progress.h
  328. promisor-remote.c
  329. promisor-remote.h
  330. prompt.c
  331. prompt.h
  332. protocol-caps.c
  333. protocol-caps.h
  334. protocol.c
  335. protocol.h
  336. prune-packed.c
  337. prune-packed.h
  338. quote.c
  339. quote.h
  340. range-diff.c
  341. range-diff.h
  342. reachable.c
  343. reachable.h
  344. read-cache.c
  345. README.md
  346. rebase-interactive.c
  347. rebase-interactive.h
  348. rebase.c
  349. rebase.h
  350. ref-filter.c
  351. ref-filter.h
  352. reflog-walk.c
  353. reflog-walk.h
  354. refs.c
  355. refs.h
  356. refspec.c
  357. refspec.h
  358. remote-curl.c
  359. remote.c
  360. remote.h
  361. replace-object.c
  362. replace-object.h
  363. repo-settings.c
  364. repository.c
  365. repository.h
  366. rerere.c
  367. rerere.h
  368. reset.c
  369. reset.h
  370. resolve-undo.c
  371. resolve-undo.h
  372. revision.c
  373. revision.h
  374. run-command.c
  375. run-command.h
  376. SECURITY.md
  377. send-pack.c
  378. send-pack.h
  379. sequencer.c
  380. sequencer.h
  381. serve.c
  382. serve.h
  383. server-info.c
  384. setup.c
  385. sh-i18n--envsubst.c
  386. sha1dc_git.c
  387. sha1dc_git.h
  388. shallow.c
  389. shallow.h
  390. shell.c
  391. shortlog.h
  392. sideband.c
  393. sideband.h
  394. sigchain.c
  395. sigchain.h
  396. simple-ipc.h
  397. sparse-index.c
  398. sparse-index.h
  399. split-index.c
  400. split-index.h
  401. stable-qsort.c
  402. strbuf.c
  403. strbuf.h
  404. streaming.c
  405. streaming.h
  406. string-list.c
  407. string-list.h
  408. strmap.c
  409. strmap.h
  410. strvec.c
  411. strvec.h
  412. sub-process.c
  413. sub-process.h
  414. submodule-config.c
  415. submodule-config.h
  416. submodule.c
  417. submodule.h
  418. symlinks.c
  419. tag.c
  420. tag.h
  421. tar.h
  422. tempfile.c
  423. tempfile.h
  424. thread-utils.c
  425. thread-utils.h
  426. tmp-objdir.c
  427. tmp-objdir.h
  428. trace.c
  429. trace.h
  430. trace2.c
  431. trace2.h
  432. trailer.c
  433. trailer.h
  434. transport-helper.c
  435. transport-internal.h
  436. transport.c
  437. transport.h
  438. tree-diff.c
  439. tree-walk.c
  440. tree-walk.h
  441. tree.c
  442. tree.h
  443. unicode-width.h
  444. unimplemented.sh
  445. unix-socket.c
  446. unix-socket.h
  447. unix-stream-server.c
  448. unix-stream-server.h
  449. unpack-trees.c
  450. unpack-trees.h
  451. upload-pack.c
  452. upload-pack.h
  453. url.c
  454. url.h
  455. urlmatch.c
  456. urlmatch.h
  457. usage.c
  458. userdiff.c
  459. userdiff.h
  460. utf8.c
  461. utf8.h
  462. varint.c
  463. varint.h
  464. version.c
  465. version.h
  466. versioncmp.c
  467. walker.c
  468. walker.h
  469. wildmatch.c
  470. wildmatch.h
  471. worktree.c
  472. worktree.h
  473. wrap-for-bin.sh
  474. wrapper.c
  475. write-or-die.c
  476. ws.c
  477. wt-status.c
  478. wt-status.h
  479. xdiff-interface.c
  480. xdiff-interface.h
  481. zlib.c
README.md

Build status

Git - fast, scalable, distributed revision control system

Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.

Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.

Please read the file INSTALL for installation instructions.

Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.

See Documentation/gittutorial.txt to get started, then see Documentation/giteveryday.txt for a useful minimum set of commands, and Documentation/git-<commandname>.txt for documentation of each command. If git has been correctly installed, then the tutorial can also be read with man gittutorial or git help tutorial, and the documentation of each command with man git-<commandname> or git help <commandname>.

CVS users may also want to read Documentation/gitcvs-migration.txt (man gitcvs-migration or git help cvs-migration if git is installed).

The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org (read Documentation/SubmittingPatches for instructions on patch submission). To subscribe to the list, send an email with just “subscribe git” in the body to majordomo@vger.kernel.org. The mailing list archives are available at https://lore.kernel.org/git/, http://marc.info/?l=git and other archival sites.

Issues which are security relevant should be disclosed privately to the Git Security mailing list git-security@googlegroups.com.

The maintainer frequently sends the “What's cooking” reports that list the current status of various development topics to the mailing list. The discussion following them give a good reference for project status, development direction and remaining tasks.

The name “git” was given by Linus Torvalds when he wrote the very first version. He described the tool as “the stupid content tracker” and the name as (depending on your mood):

  • random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of “get” may or may not be relevant.
  • stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
  • “global information tracker”: you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
  • “goddamn idiotic truckload of sh*t”: when it breaks