6 git - the stupid content tracker
11 'git-<command>' <args>
16 This is reference information for the core git commands.
18 Before reading this cover to cover, you may want to take a look
19 at the link:tutorial.html[tutorial] document.
21 The <<Discussion>> section below contains much useful definition and
22 clarification info - read that first. And of the commands, I suggest
23 reading gitlink:git-update-index[1] and
24 gitlink:git-read-tree[1] first - I wish I had!
26 If you are migrating from CVS, link:cvs-migration.html[cvs migration]
27 document may be helpful after you finish the tutorial.
29 After you get the general feel from the tutorial and this
30 overview page, you may want to take a look at the
31 link:howto-index.html[howto] documents.
34 David Greaves <david@dgreaves.com>
37 Updated by Junio C Hamano <junkio@cox.net> on 2005-05-05 to
38 reflect recent changes.
42 The git commands can helpfully be split into those that manipulate
43 the repository, the cache and the working fileset, those that
44 interrogate and compare them, and those that moves objects and
45 references between repositories.
47 In addition, git itself comes with a spartan set of porcelain
48 commands. They are usable but are not meant to compete with real
51 There are also some ancillary programs that can be viewed as useful
52 aids for using the core commands but which are unlikely to be used by
53 SCMs layered over git.
57 gitlink:git-apply[1]::
58 Reads a "diff -up1" or git generated patch file and
59 applies it to the working tree.
61 gitlink:git-checkout-index[1]::
62 Copy files from the cache to the working directory
64 gitlink:git-commit-tree[1]::
65 Creates a new commit object
67 gitlink:git-hash-object[1]::
68 Computes the object ID from a file.
70 gitlink:git-index-pack.html[1]::
71 Build pack index file for an existing packed archive.
73 gitlink:git-init-db[1]::
74 Creates an empty git object database
76 gitlink:git-merge-index[1]::
77 Runs a merge for files needing merging
79 gitlink:git-mktag[1]::
82 gitlink:git-pack-objects[1]::
83 Creates a packed archive of objects.
85 gitlink:git-prune-packed[1]::
86 Remove extra objects that are already in pack files.
88 gitlink:git-read-tree[1]::
89 Reads tree information into the directory cache
91 gitlink:git-unpack-objects[1]::
92 Unpacks objects out of a packed archive.
94 gitlink:git-update-index[1]::
95 Modifies the index or directory cache
97 gitlink:git-write-tree[1]::
98 Creates a tree from the current cache
101 Interrogation commands
102 ~~~~~~~~~~~~~~~~~~~~~~
104 gitlink:git-cat-file[1]::
105 Provide content or type information for repository objects
107 gitlink:git-diff-index[1]::
108 Compares content and mode of blobs between the cache and repository
110 gitlink:git-diff-files[1]::
111 Compares files in the working tree and the cache
113 gitlink:git-diff-stages[1]::
114 Compares two "merge stages" in the index file.
116 gitlink:git-diff-tree[1]::
117 Compares the content and mode of blobs found via two tree objects
119 gitlink:git-fsck-objects[1]::
120 Verifies the connectivity and validity of the objects in the database
122 gitlink:git-ls-files[1]::
123 Information about files in the cache/working directory
125 gitlink:git-ls-tree[1]::
126 Displays a tree object in human readable form
128 gitlink:git-merge-base[1]::
129 Finds as good a common ancestor as possible for a merge
131 gitlink:git-name-rev[1]::
132 Find symbolic names for given revs
134 gitlink:git-rev-list[1]::
135 Lists commit objects in reverse chronological order
137 gitlink:git-show-index[1]::
138 Displays contents of a pack idx file.
140 gitlink:git-tar-tree[1]::
141 Creates a tar archive of the files in the named tree
143 gitlink:git-unpack-file[1]::
144 Creates a temporary file with a blob's contents
147 Displays a git logical variable
149 gitlink:git-verify-pack[1]::
150 Validates packed git archive files
152 The interrogate commands may create files - and you can force them to
153 touch the working file set - but in general they don't
156 Synching repositories
157 ~~~~~~~~~~~~~~~~~~~~~
159 gitlink:git-clone-pack[1]::
160 Clones a repository into the current repository (engine
161 for ssh and local transport)
163 gitlink:git-fetch-pack[1]::
164 Updates from a remote repository.
166 gitlink:git-http-fetch[1]::
167 Downloads a remote git repository via HTTP
169 gitlink:git-local-fetch[1]::
170 Duplicates another git repository on a local system
172 gitlink:git-peek-remote[1]::
173 Lists references on a remote repository using upload-pack protocol.
175 gitlink:git-receive-pack[1]::
176 Invoked by 'git-send-pack' to receive what is pushed to it.
178 gitlink:git-send-pack[1]::
179 Pushes to a remote repository, intelligently.
181 gitlink:git-shell[1]::
182 Restricted shell for GIT-only SSH access.
184 gitlink:git-ssh-fetch[1]::
185 Pulls from a remote repository over ssh connection
187 gitlink:git-ssh-upload[1]::
188 Helper "server-side" program used by git-ssh-fetch
190 gitlink:git-update-server-info[1]::
191 Updates auxiliary information on a dumb server to help
192 clients discover references and packs on it.
194 gitlink:git-upload-pack[1]::
195 Invoked by 'git-clone-pack' and 'git-fetch-pack' to push
199 Porcelain-ish Commands
200 ----------------------
203 Add paths to the index file.
206 Apply patches from a mailbox, but cooler.
208 gitlink:git-applymbox[1]::
209 Apply patches from a mailbox.
211 gitlink:git-bisect[1]::
212 Find the change that introduced a bug.
214 gitlink:git-branch[1]::
215 Create and Show branches.
217 gitlink:git-checkout[1]::
218 Checkout and switch to a branch.
220 gitlink:git-cherry-pick[1]::
221 Cherry-pick the effect of an existing commit.
223 gitlink:git-clone[1]::
224 Clones a repository into a new directory.
226 gitlink:git-commit[1]::
227 Record changes to the repository.
229 gitlink:git-diff[1]::
230 Show changes between commits, commit and working tree, etc.
232 gitlink:git-fetch[1]::
233 Download from a remote repository via various protocols.
235 gitlink:git-format-patch[1]::
236 Prepare patches for e-mail submission.
238 gitlink:git-grep[1]::
239 Print lines matching a pattern
244 gitlink:git-ls-remote[1]::
245 Shows references in a remote or local repository.
247 gitlink:git-merge[1]::
248 Grand unified merge driver.
251 Move or rename a file, a directory, or a symlink.
253 gitlink:git-octopus[1]::
254 Merge more than two commits.
256 gitlink:git-pull[1]::
257 Fetch from and merge with a remote repository.
259 gitlink:git-push[1]::
260 Update remote refs along with associated objects.
262 gitlink:git-rebase[1]::
263 Rebase local commits to new upstream head.
265 gitlink:git-rename[1]::
266 Rename files and directories.
268 gitlink:git-repack[1]::
269 Pack unpacked objects in a repository.
271 gitlink:git-reset[1]::
272 Reset current HEAD to the specified state.
274 gitlink:git-resolve[1]::
277 gitlink:git-revert[1]::
278 Revert an existing commit.
280 gitlink:git-shortlog[1]::
281 Summarizes 'git log' output.
283 gitlink:git-show-branch[1]::
284 Show branches and their commits.
286 gitlink:git-status[1]::
287 Shows the working tree status.
289 gitlink:git-verify-tag[1]::
290 Check the GPG signature of tag.
292 gitlink:git-whatchanged[1]::
293 Shows commit logs and differences they introduce.
300 gitlink:git-applypatch[1]::
301 Apply one patch extracted from an e-mail.
303 gitlink:git-archimport[1]::
304 Import an arch repository into git.
306 gitlink:git-convert-objects[1]::
307 Converts old-style git repository
309 gitlink:git-cvsimport[1]::
310 Salvage your data out of another SCM people love to hate.
312 gitlink:git-merge-one-file[1]::
313 The standard helper program to use with "git-merge-index"
315 gitlink:git-prune[1]::
316 Prunes all unreachable objects from the object database
318 gitlink:git-relink[1]::
319 Hardlink common objects in local repositories.
321 gitlink:git-svnimport[1]::
322 Import a SVN repository into git.
324 gitlink:git-sh-setup[1]::
325 Common git shell script setup code.
327 gitlink:git-symbolic-ref[1]::
328 Read and modify symbolic refs
331 An example script to create a tag object signed with GPG
333 gitlink:git-update-ref[1]::
334 Update the object name stored in a ref safely.
339 gitlink:git-check-ref-format[1]::
340 Make sure ref name is well formed.
342 gitlink:git-cherry[1]::
343 Find commits not merged upstream.
345 gitlink:git-count-objects[1]::
346 Count unpacked number of objects and their disk consumption.
348 gitlink:git-daemon[1]::
349 A really simple server for git repositories.
351 gitlink:git-get-tar-commit-id[1]::
352 Extract commit ID from an archive created using git-tar-tree.
354 gitlink:git-mailinfo[1]::
355 Extracts patch from a single e-mail message.
357 gitlink:git-mailsplit[1]::
360 gitlink:git-patch-id[1]::
361 Compute unique ID for a patch.
363 gitlink:git-parse-remote[1]::
364 Routines to help parsing $GIT_DIR/remotes/
366 gitlink:git-request-pull[1]::
369 gitlink:git-rev-parse[1]::
370 Pick out and massage parameters.
372 gitlink:git-send-email[1]::
373 Send patch e-mails out of "format-patch --mbox" output.
375 gitlink:git-symbolic-refs[1]::
376 Read and modify symbolic refs.
378 gitlink:git-stripspace[1]::
379 Filter out empty lines.
382 Commands not yet documented
383 ---------------------------
389 Configuration Mechanism
390 -----------------------
392 Starting from 0.99.9 (actually mid 0.99.8.GIT), .git/config file
393 is used to hold per-repository configuration options. It is a
394 simple text file modelled after `.ini` format familiar to some
395 people. Here is an example:
399 # This is the config file, and
400 # a '#' or ';' character indicates
406 ; Don't trust file modes
411 name = "Junio C Hamano"
412 email = "junkio@twinsun.com"
416 Various commands read from the configuration file and adjust
417 their operation accordingly.
420 Identifier Terminology
421 ----------------------
423 Indicates the sha1 identifier for any type of object
426 Indicates a blob object sha1 identifier
429 Indicates a tree object sha1 identifier
432 Indicates a commit object sha1 identifier
435 Indicates a tree, commit or tag object sha1 identifier. A
436 command that takes a <tree-ish> argument ultimately wants to
437 operate on a <tree> object but automatically dereferences
438 <commit> and <tag> objects that point at a <tree>.
441 Indicates that an object type is required.
442 Currently one of: blob/tree/commit/tag
445 Indicates a filename - always relative to the root of
446 the tree structure GIT_INDEX_FILE describes.
450 Any git command accepting any <object> can also use the following
454 indicates the head of the repository (ie the contents of
458 (ie the contents of `$GIT_DIR/refs/tags/<tag>`)
461 (ie the contents of `$GIT_DIR/refs/heads/<head>`)
463 a valid snapshot 'name'+
464 (ie the contents of `$GIT_DIR/refs/snap/<snap>`)
467 File/Directory Structure
468 ------------------------
470 Please see link:repository-layout.html[repository layout] document.
472 Higher level SCMs may provide and manage additional information in the
478 Please see link:glossary.html[glossary] document.
481 Environment Variables
482 ---------------------
483 Various git commands use the following environment variables:
487 These environment variables apply to 'all' core git commands. Nb: it
488 is worth noting that they may be used/overridden by SCMS sitting above
489 git so take care if using Cogito etc
492 This environment allows the specification of an alternate
493 cache/index file. If not specified, the default of
494 `$GIT_DIR/index` is used.
496 'GIT_OBJECT_DIRECTORY'::
497 If the object storage directory is specified via this
498 environment variable then the sha1 directories are created
499 underneath - otherwise the default `$GIT_DIR/objects`
502 'GIT_ALTERNATE_OBJECT_DIRECTORIES'::
503 Due to the immutable nature of git objects, old objects can be
504 archived into shared, read-only directories. This variable
505 specifies a ":" separated list of git object directories which
506 can be used to search for git objects. New objects will not be
507 written to these directories.
510 If the 'GIT_DIR' environment variable is set then it specifies
511 a path to use instead of `./.git` for the base of the
519 'GIT_COMMITTER_NAME'::
520 'GIT_COMMITTER_EMAIL'::
521 see gitlink:git-commit-tree[1]
526 'GIT_EXTERNAL_DIFF'::
527 see the "generating patches" section in :
528 gitlink:git-diff-index[1];
529 gitlink:git-diff-files[1];
530 gitlink:git-diff-tree[1]
532 Discussion[[Discussion]]
533 ------------------------
538 Written by Linus Torvalds <torvalds@osdl.org> and the git-list <git@vger.kernel.org>.
542 Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>.
546 Part of the gitlink:git[7] suite