sequencer: introduce the `merge` command

This patch is part of the effort to reimplement `--preserve-merges` with
a substantially improved design, a design that has been developed in the
Git for Windows project to maintain the dozens of Windows-specific patch
series on top of upstream Git.

The previous patch implemented the `label` and `reset` commands to label
commits and to reset to labeled commits. This patch adds the `merge`
command, with the following syntax:

	merge [-C <commit>] <rev> # <oneline>

The <commit> parameter in this instance is the *original* merge commit,
whose author and message will be used for the merge commit that is about
to be created.

The <rev> parameter refers to the (possibly rewritten) revision to
merge. Let's see an example of a todo list (the initial `label onto`
command is an auto-generated convenience so that the label `onto` can be
used to refer to the revision onto which we rebase):

	label onto

	# Branch abc
	reset onto
	pick deadbeef Hello, world!
	label abc

	reset onto
	pick cafecafe And now for something completely different
	merge -C baaabaaa abc # Merge the branch 'abc' into master

To edit the merge commit's message (a "reword" for merges, if you will),
use `-c` (lower-case) instead of `-C`; this convention was borrowed from
`git commit` that also supports `-c` and `-C` with similar meanings.

To create *new* merges, i.e. without copying the commit message from an
existing commit, simply omit the `-C <commit>` parameter (which will
open an editor for the merge message):

	merge abc

This comes in handy when splitting a branch into two or more branches.

Note: this patch only adds support for recursive merges, to keep things
simple. Support for octopus merges will be added later in a separate
patch series, support for merges using strategies other than the
recursive merge is left for the future.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2 files changed
tree: b24671648020ee2b0bc59d40559671d8dd056573
  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/
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  21. xdiff/
  22. .clang-format
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  54. builtin.h
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  66. check_bindir
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  73. combine-diff.c
  74. command-list.txt
  75. commit-slab.h
  76. commit.c
  77. commit.h
  78. common-main.c
  79. config.c
  80. config.h
  81. config.mak.in
  82. config.mak.uname
  83. configure.ac
  84. connect.c
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  86. connected.c
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  88. convert.c
  89. convert.h
  90. copy.c
  91. COPYING
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  97. csum-file.c
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  112. diffcore-order.c
  113. diffcore-pickaxe.c
  114. diffcore-rename.c
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  118. dir.c
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  120. editor.c
  121. entry.c
  122. environment.c
  123. exec-cmd.c
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  125. fast-import.c
  126. fetch-object.c
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  129. fetch-pack.h
  130. fmt-merge-msg.h
  131. fsck.c
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  133. fsmonitor.c
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  135. generate-cmdlist.sh
  136. gettext.c
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  138. git-add--interactive.perl
  139. git-archimport.perl
  140. git-bisect.sh
  141. git-compat-util.h
  142. git-cvsexportcommit.perl
  143. git-cvsimport.perl
  144. git-cvsserver.perl
  145. git-difftool--helper.sh
  146. git-filter-branch.sh
  147. git-instaweb.sh
  148. git-merge-octopus.sh
  149. git-merge-one-file.sh
  150. git-merge-resolve.sh
  151. git-mergetool--lib.sh
  152. git-mergetool.sh
  153. git-p4.py
  154. git-parse-remote.sh
  155. git-quiltimport.sh
  156. git-rebase--am.sh
  157. git-rebase--interactive.sh
  158. git-rebase--merge.sh
  159. git-rebase.sh
  160. git-remote-testgit.sh
  161. git-request-pull.sh
  162. git-send-email.perl
  163. git-sh-i18n.sh
  164. git-sh-setup.sh
  165. git-stash.sh
  166. git-submodule.sh
  167. git-svn.perl
  168. GIT-VERSION-GEN
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  170. git.c
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  174. graph.c
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  183. hex.c
  184. http-backend.c
  185. http-fetch.c
  186. http-push.c
  187. http-walker.c
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  190. ident.c
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  192. INSTALL
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  210. list.h
  211. ll-merge.c
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  223. mem-pool.c
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  225. merge-blobs.c
  226. merge-blobs.h
  227. merge-recursive.c
  228. merge-recursive.h
  229. merge.c
  230. mergesort.c
  231. mergesort.h
  232. name-hash.c
  233. notes-cache.c
  234. notes-cache.h
  235. notes-merge.c
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  260. pager.c
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  262. parse-options.c
  263. parse-options.h
  264. patch-delta.c
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  284. quote.c
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  288. read-cache.c
  289. README.md
  290. ref-filter.c
  291. ref-filter.h
  292. reflog-walk.c
  293. reflog-walk.h
  294. refs.c
  295. refs.h
  296. remote-curl.c
  297. remote-testsvn.c
  298. remote.c
  299. remote.h
  300. replace-object.c
  301. repository.c
  302. repository.h
  303. rerere.c
  304. rerere.h
  305. resolve-undo.c
  306. resolve-undo.h
  307. revision.c
  308. revision.h
  309. run-command.c
  310. run-command.h
  311. send-pack.c
  312. send-pack.h
  313. sequencer.c
  314. sequencer.h
  315. server-info.c
  316. setup.c
  317. sh-i18n--envsubst.c
  318. sha1-array.c
  319. sha1-array.h
  320. sha1-file.c
  321. sha1-lookup.c
  322. sha1-lookup.h
  323. sha1-name.c
  324. sha1dc_git.c
  325. sha1dc_git.h
  326. shallow.c
  327. shell.c
  328. shortlog.h
  329. show-index.c
  330. sideband.c
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  332. sigchain.c
  333. sigchain.h
  334. split-index.c
  335. split-index.h
  336. strbuf.c
  337. strbuf.h
  338. streaming.c
  339. streaming.h
  340. string-list.c
  341. string-list.h
  342. sub-process.c
  343. sub-process.h
  344. submodule-config.c
  345. submodule-config.h
  346. submodule.c
  347. submodule.h
  348. symlinks.c
  349. tag.c
  350. tag.h
  351. tar.h
  352. tempfile.c
  353. tempfile.h
  354. thread-utils.c
  355. thread-utils.h
  356. tmp-objdir.c
  357. tmp-objdir.h
  358. trace.c
  359. trace.h
  360. trailer.c
  361. trailer.h
  362. transport-helper.c
  363. transport-internal.h
  364. transport.c
  365. transport.h
  366. tree-diff.c
  367. tree-walk.c
  368. tree-walk.h
  369. tree.c
  370. tree.h
  371. unicode-width.h
  372. unimplemented.sh
  373. unix-socket.c
  374. unix-socket.h
  375. unpack-trees.c
  376. unpack-trees.h
  377. upload-pack.c
  378. url.c
  379. url.h
  380. urlmatch.c
  381. urlmatch.h
  382. usage.c
  383. userdiff.c
  384. userdiff.h
  385. utf8.c
  386. utf8.h
  387. varint.c
  388. varint.h
  389. version.c
  390. version.h
  391. versioncmp.c
  392. walker.c
  393. walker.h
  394. wildmatch.c
  395. wildmatch.h
  396. worktree.c
  397. worktree.h
  398. wrap-for-bin.sh
  399. wrapper.c
  400. write-or-die.c
  401. ws.c
  402. wt-status.c
  403. wt-status.h
  404. xdiff-interface.c
  405. xdiff-interface.h
  406. zlib.c
README.md

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-.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://public-inbox.org/git/, http://marc.info/?l=git and other archival sites.

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