6 git - the stupid content tracker
12 'git' [--version] [--help] [-c <name>=<value>]
13 [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
14 [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]
15 [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
20 Git is a fast, scalable, distributed revision control system with an
21 unusually rich command set that provides both high-level operations
22 and full access to internals.
24 See linkgit:gittutorial[7] to get started, then see
25 link:everyday.html[Everyday Git] for a useful minimum set of
26 commands. The link:user-manual.html[Git User's Manual] has a more
27 in-depth introduction.
29 After you mastered the basic concepts, you can come back to this
30 page to learn what commands git offers. You can learn more about
31 individual git commands with "git help command". linkgit:gitcli[7]
32 manual page gives you an overview of the command line command syntax.
34 Formatted and hyperlinked version of the latest git documentation
35 can be viewed at `http://git-htmldocs.googlecode.com/git/git.html`.
41 You are reading the documentation for the latest (possibly
42 unreleased) version of git, that is available from 'master'
43 branch of the `git.git` repository.
44 Documentation for older releases are available here:
46 * link:v1.8.1.4/git.html[documentation for release 1.8.1.4]
49 link:RelNotes/1.8.1.4.txt[1.8.1.4],
50 link:RelNotes/1.8.1.3.txt[1.8.1.3],
51 link:RelNotes/1.8.1.2.txt[1.8.1.2],
52 link:RelNotes/1.8.1.1.txt[1.8.1.1],
53 link:RelNotes/1.8.1.txt[1.8.1].
55 * link:v1.8.0.3/git.html[documentation for release 1.8.0.3]
58 link:RelNotes/1.8.0.3.txt[1.8.0.3],
59 link:RelNotes/1.8.0.2.txt[1.8.0.2],
60 link:RelNotes/1.8.0.1.txt[1.8.0.1],
61 link:RelNotes/1.8.0.txt[1.8.0].
63 * link:v1.7.12.4/git.html[documentation for release 1.7.12.4]
66 link:RelNotes/1.7.12.4.txt[1.7.12.4],
67 link:RelNotes/1.7.12.3.txt[1.7.12.3],
68 link:RelNotes/1.7.12.2.txt[1.7.12.2],
69 link:RelNotes/1.7.12.1.txt[1.7.12.1],
70 link:RelNotes/1.7.12.txt[1.7.12].
72 * link:v1.7.11.7/git.html[documentation for release 1.7.11.7]
75 link:RelNotes/1.7.11.7.txt[1.7.11.7],
76 link:RelNotes/1.7.11.6.txt[1.7.11.6],
77 link:RelNotes/1.7.11.5.txt[1.7.11.5],
78 link:RelNotes/1.7.11.4.txt[1.7.11.4],
79 link:RelNotes/1.7.11.3.txt[1.7.11.3],
80 link:RelNotes/1.7.11.2.txt[1.7.11.2],
81 link:RelNotes/1.7.11.1.txt[1.7.11.1],
82 link:RelNotes/1.7.11.txt[1.7.11].
84 * link:v1.7.10.5/git.html[documentation for release 1.7.10.5]
87 link:RelNotes/1.7.10.5.txt[1.7.10.5],
88 link:RelNotes/1.7.10.4.txt[1.7.10.4],
89 link:RelNotes/1.7.10.3.txt[1.7.10.3],
90 link:RelNotes/1.7.10.2.txt[1.7.10.2],
91 link:RelNotes/1.7.10.1.txt[1.7.10.1],
92 link:RelNotes/1.7.10.txt[1.7.10].
94 * link:v1.7.9.7/git.html[documentation for release 1.7.9.7]
97 link:RelNotes/1.7.9.7.txt[1.7.9.7],
98 link:RelNotes/1.7.9.6.txt[1.7.9.6],
99 link:RelNotes/1.7.9.5.txt[1.7.9.5],
100 link:RelNotes/1.7.9.4.txt[1.7.9.4],
101 link:RelNotes/1.7.9.3.txt[1.7.9.3],
102 link:RelNotes/1.7.9.2.txt[1.7.9.2],
103 link:RelNotes/1.7.9.1.txt[1.7.9.1],
104 link:RelNotes/1.7.9.txt[1.7.9].
106 * link:v1.7.8.6/git.html[documentation for release 1.7.8.6]
109 link:RelNotes/1.7.8.6.txt[1.7.8.6],
110 link:RelNotes/1.7.8.5.txt[1.7.8.5],
111 link:RelNotes/1.7.8.4.txt[1.7.8.4],
112 link:RelNotes/1.7.8.3.txt[1.7.8.3],
113 link:RelNotes/1.7.8.2.txt[1.7.8.2],
114 link:RelNotes/1.7.8.1.txt[1.7.8.1],
115 link:RelNotes/1.7.8.txt[1.7.8].
117 * link:v1.7.7.7/git.html[documentation for release 1.7.7.7]
120 link:RelNotes/1.7.7.7.txt[1.7.7.7],
121 link:RelNotes/1.7.7.6.txt[1.7.7.6],
122 link:RelNotes/1.7.7.5.txt[1.7.7.5],
123 link:RelNotes/1.7.7.4.txt[1.7.7.4],
124 link:RelNotes/1.7.7.3.txt[1.7.7.3],
125 link:RelNotes/1.7.7.2.txt[1.7.7.2],
126 link:RelNotes/1.7.7.1.txt[1.7.7.1],
127 link:RelNotes/1.7.7.txt[1.7.7].
129 * link:v1.7.6.6/git.html[documentation for release 1.7.6.6]
132 link:RelNotes/1.7.6.6.txt[1.7.6.6],
133 link:RelNotes/1.7.6.5.txt[1.7.6.5],
134 link:RelNotes/1.7.6.4.txt[1.7.6.4],
135 link:RelNotes/1.7.6.3.txt[1.7.6.3],
136 link:RelNotes/1.7.6.2.txt[1.7.6.2],
137 link:RelNotes/1.7.6.1.txt[1.7.6.1],
138 link:RelNotes/1.7.6.txt[1.7.6].
140 * link:v1.7.5.4/git.html[documentation for release 1.7.5.4]
143 link:RelNotes/1.7.5.4.txt[1.7.5.4],
144 link:RelNotes/1.7.5.3.txt[1.7.5.3],
145 link:RelNotes/1.7.5.2.txt[1.7.5.2],
146 link:RelNotes/1.7.5.1.txt[1.7.5.1],
147 link:RelNotes/1.7.5.txt[1.7.5].
149 * link:v1.7.4.5/git.html[documentation for release 1.7.4.5]
152 link:RelNotes/1.7.4.5.txt[1.7.4.5],
153 link:RelNotes/1.7.4.4.txt[1.7.4.4],
154 link:RelNotes/1.7.4.3.txt[1.7.4.3],
155 link:RelNotes/1.7.4.2.txt[1.7.4.2],
156 link:RelNotes/1.7.4.1.txt[1.7.4.1],
157 link:RelNotes/1.7.4.txt[1.7.4].
159 * link:v1.7.3.5/git.html[documentation for release 1.7.3.5]
162 link:RelNotes/1.7.3.5.txt[1.7.3.5],
163 link:RelNotes/1.7.3.4.txt[1.7.3.4],
164 link:RelNotes/1.7.3.3.txt[1.7.3.3],
165 link:RelNotes/1.7.3.2.txt[1.7.3.2],
166 link:RelNotes/1.7.3.1.txt[1.7.3.1],
167 link:RelNotes/1.7.3.txt[1.7.3].
169 * link:v1.7.2.5/git.html[documentation for release 1.7.2.5]
172 link:RelNotes/1.7.2.5.txt[1.7.2.5],
173 link:RelNotes/1.7.2.4.txt[1.7.2.4],
174 link:RelNotes/1.7.2.3.txt[1.7.2.3],
175 link:RelNotes/1.7.2.2.txt[1.7.2.2],
176 link:RelNotes/1.7.2.1.txt[1.7.2.1],
177 link:RelNotes/1.7.2.txt[1.7.2].
179 * link:v1.7.1.4/git.html[documentation for release 1.7.1.4]
182 link:RelNotes/1.7.1.4.txt[1.7.1.4],
183 link:RelNotes/1.7.1.3.txt[1.7.1.3],
184 link:RelNotes/1.7.1.2.txt[1.7.1.2],
185 link:RelNotes/1.7.1.1.txt[1.7.1.1],
186 link:RelNotes/1.7.1.txt[1.7.1].
188 * link:v1.7.0.9/git.html[documentation for release 1.7.0.9]
191 link:RelNotes/1.7.0.9.txt[1.7.0.9],
192 link:RelNotes/1.7.0.8.txt[1.7.0.8],
193 link:RelNotes/1.7.0.7.txt[1.7.0.7],
194 link:RelNotes/1.7.0.6.txt[1.7.0.6],
195 link:RelNotes/1.7.0.5.txt[1.7.0.5],
196 link:RelNotes/1.7.0.4.txt[1.7.0.4],
197 link:RelNotes/1.7.0.3.txt[1.7.0.3],
198 link:RelNotes/1.7.0.2.txt[1.7.0.2],
199 link:RelNotes/1.7.0.1.txt[1.7.0.1],
200 link:RelNotes/1.7.0.txt[1.7.0].
202 * link:v1.6.6.3/git.html[documentation for release 1.6.6.3]
205 link:RelNotes/1.6.6.3.txt[1.6.6.3],
206 link:RelNotes/1.6.6.2.txt[1.6.6.2],
207 link:RelNotes/1.6.6.1.txt[1.6.6.1],
208 link:RelNotes/1.6.6.txt[1.6.6].
210 * link:v1.6.5.9/git.html[documentation for release 1.6.5.9]
213 link:RelNotes/1.6.5.9.txt[1.6.5.9],
214 link:RelNotes/1.6.5.8.txt[1.6.5.8],
215 link:RelNotes/1.6.5.7.txt[1.6.5.7],
216 link:RelNotes/1.6.5.6.txt[1.6.5.6],
217 link:RelNotes/1.6.5.5.txt[1.6.5.5],
218 link:RelNotes/1.6.5.4.txt[1.6.5.4],
219 link:RelNotes/1.6.5.3.txt[1.6.5.3],
220 link:RelNotes/1.6.5.2.txt[1.6.5.2],
221 link:RelNotes/1.6.5.1.txt[1.6.5.1],
222 link:RelNotes/1.6.5.txt[1.6.5].
224 * link:v1.6.4.5/git.html[documentation for release 1.6.4.5]
227 link:RelNotes/1.6.4.5.txt[1.6.4.5],
228 link:RelNotes/1.6.4.4.txt[1.6.4.4],
229 link:RelNotes/1.6.4.3.txt[1.6.4.3],
230 link:RelNotes/1.6.4.2.txt[1.6.4.2],
231 link:RelNotes/1.6.4.1.txt[1.6.4.1],
232 link:RelNotes/1.6.4.txt[1.6.4].
234 * link:v1.6.3.4/git.html[documentation for release 1.6.3.4]
237 link:RelNotes/1.6.3.4.txt[1.6.3.4],
238 link:RelNotes/1.6.3.3.txt[1.6.3.3],
239 link:RelNotes/1.6.3.2.txt[1.6.3.2],
240 link:RelNotes/1.6.3.1.txt[1.6.3.1],
241 link:RelNotes/1.6.3.txt[1.6.3].
244 link:RelNotes/1.6.2.5.txt[1.6.2.5],
245 link:RelNotes/1.6.2.4.txt[1.6.2.4],
246 link:RelNotes/1.6.2.3.txt[1.6.2.3],
247 link:RelNotes/1.6.2.2.txt[1.6.2.2],
248 link:RelNotes/1.6.2.1.txt[1.6.2.1],
249 link:RelNotes/1.6.2.txt[1.6.2].
251 * link:v1.6.1.3/git.html[documentation for release 1.6.1.3]
254 link:RelNotes/1.6.1.3.txt[1.6.1.3],
255 link:RelNotes/1.6.1.2.txt[1.6.1.2],
256 link:RelNotes/1.6.1.1.txt[1.6.1.1],
257 link:RelNotes/1.6.1.txt[1.6.1].
259 * link:v1.6.0.6/git.html[documentation for release 1.6.0.6]
262 link:RelNotes/1.6.0.6.txt[1.6.0.6],
263 link:RelNotes/1.6.0.5.txt[1.6.0.5],
264 link:RelNotes/1.6.0.4.txt[1.6.0.4],
265 link:RelNotes/1.6.0.3.txt[1.6.0.3],
266 link:RelNotes/1.6.0.2.txt[1.6.0.2],
267 link:RelNotes/1.6.0.1.txt[1.6.0.1],
268 link:RelNotes/1.6.0.txt[1.6.0].
270 * link:v1.5.6.6/git.html[documentation for release 1.5.6.6]
273 link:RelNotes/1.5.6.6.txt[1.5.6.6],
274 link:RelNotes/1.5.6.5.txt[1.5.6.5],
275 link:RelNotes/1.5.6.4.txt[1.5.6.4],
276 link:RelNotes/1.5.6.3.txt[1.5.6.3],
277 link:RelNotes/1.5.6.2.txt[1.5.6.2],
278 link:RelNotes/1.5.6.1.txt[1.5.6.1],
279 link:RelNotes/1.5.6.txt[1.5.6].
281 * link:v1.5.5.6/git.html[documentation for release 1.5.5.6]
284 link:RelNotes/1.5.5.6.txt[1.5.5.6],
285 link:RelNotes/1.5.5.5.txt[1.5.5.5],
286 link:RelNotes/1.5.5.4.txt[1.5.5.4],
287 link:RelNotes/1.5.5.3.txt[1.5.5.3],
288 link:RelNotes/1.5.5.2.txt[1.5.5.2],
289 link:RelNotes/1.5.5.1.txt[1.5.5.1],
290 link:RelNotes/1.5.5.txt[1.5.5].
292 * link:v1.5.4.7/git.html[documentation for release 1.5.4.7]
295 link:RelNotes/1.5.4.7.txt[1.5.4.7],
296 link:RelNotes/1.5.4.6.txt[1.5.4.6],
297 link:RelNotes/1.5.4.5.txt[1.5.4.5],
298 link:RelNotes/1.5.4.4.txt[1.5.4.4],
299 link:RelNotes/1.5.4.3.txt[1.5.4.3],
300 link:RelNotes/1.5.4.2.txt[1.5.4.2],
301 link:RelNotes/1.5.4.1.txt[1.5.4.1],
302 link:RelNotes/1.5.4.txt[1.5.4].
304 * link:v1.5.3.8/git.html[documentation for release 1.5.3.8]
307 link:RelNotes/1.5.3.8.txt[1.5.3.8],
308 link:RelNotes/1.5.3.7.txt[1.5.3.7],
309 link:RelNotes/1.5.3.6.txt[1.5.3.6],
310 link:RelNotes/1.5.3.5.txt[1.5.3.5],
311 link:RelNotes/1.5.3.4.txt[1.5.3.4],
312 link:RelNotes/1.5.3.3.txt[1.5.3.3],
313 link:RelNotes/1.5.3.2.txt[1.5.3.2],
314 link:RelNotes/1.5.3.1.txt[1.5.3.1],
315 link:RelNotes/1.5.3.txt[1.5.3].
317 * link:v1.5.2.5/git.html[documentation for release 1.5.2.5]
320 link:RelNotes/1.5.2.5.txt[1.5.2.5],
321 link:RelNotes/1.5.2.4.txt[1.5.2.4],
322 link:RelNotes/1.5.2.3.txt[1.5.2.3],
323 link:RelNotes/1.5.2.2.txt[1.5.2.2],
324 link:RelNotes/1.5.2.1.txt[1.5.2.1],
325 link:RelNotes/1.5.2.txt[1.5.2].
327 * link:v1.5.1.6/git.html[documentation for release 1.5.1.6]
330 link:RelNotes/1.5.1.6.txt[1.5.1.6],
331 link:RelNotes/1.5.1.5.txt[1.5.1.5],
332 link:RelNotes/1.5.1.4.txt[1.5.1.4],
333 link:RelNotes/1.5.1.3.txt[1.5.1.3],
334 link:RelNotes/1.5.1.2.txt[1.5.1.2],
335 link:RelNotes/1.5.1.1.txt[1.5.1.1],
336 link:RelNotes/1.5.1.txt[1.5.1].
338 * link:v1.5.0.7/git.html[documentation for release 1.5.0.7]
341 link:RelNotes/1.5.0.7.txt[1.5.0.7],
342 link:RelNotes/1.5.0.6.txt[1.5.0.6],
343 link:RelNotes/1.5.0.5.txt[1.5.0.5],
344 link:RelNotes/1.5.0.3.txt[1.5.0.3],
345 link:RelNotes/1.5.0.2.txt[1.5.0.2],
346 link:RelNotes/1.5.0.1.txt[1.5.0.1],
347 link:RelNotes/1.5.0.txt[1.5.0].
349 * documentation for release link:v1.4.4.4/git.html[1.4.4.4],
350 link:v1.3.3/git.html[1.3.3],
351 link:v1.2.6/git.html[1.2.6],
352 link:v1.0.13/git.html[1.0.13].
361 Prints the git suite version that the 'git' program came from.
364 Prints the synopsis and a list of the most commonly used
365 commands. If the option '--all' or '-a' is given then all
366 available commands are printed. If a git command is named this
367 option will bring up the manual page for that command.
369 Other options are available to control how the manual page is
370 displayed. See linkgit:git-help[1] for more information,
371 because `git --help ...` is converted internally into `git
375 Pass a configuration parameter to the command. The value
376 given will override values from configuration files.
377 The <name> is expected in the same format as listed by
378 'git config' (subkeys separated by dots).
380 --exec-path[=<path>]::
381 Path to wherever your core git programs are installed.
382 This can also be controlled by setting the GIT_EXEC_PATH
383 environment variable. If no path is given, 'git' will print
384 the current setting and then exit.
387 Print the path, without trailing slash, where git's HTML
388 documentation is installed and exit.
391 Print the manpath (see `man(1)`) for the man pages for
392 this version of git and exit.
395 Print the path where the Info files documenting this
396 version of git are installed and exit.
400 Pipe all output into 'less' (or if set, $PAGER) if standard
401 output is a terminal. This overrides the `pager.<cmd>`
402 configuration options (see the "Configuration Mechanism" section
406 Do not pipe git output into a pager.
409 Set the path to the repository. This can also be controlled by
410 setting the GIT_DIR environment variable. It can be an absolute
411 path or relative path to current working directory.
414 Set the path to the working tree. It can be an absolute path
415 or a path relative to the current working directory.
416 This can also be controlled by setting the GIT_WORK_TREE
417 environment variable and the core.worktree configuration
418 variable (see core.worktree in linkgit:git-config[1] for a
419 more detailed discussion).
422 Set the git namespace. See linkgit:gitnamespaces[7] for more
423 details. Equivalent to setting the `GIT_NAMESPACE` environment
427 Treat the repository as a bare repository. If GIT_DIR
428 environment is not set, it is set to the current working
431 --no-replace-objects::
432 Do not use replacement refs to replace git objects. See
433 linkgit:git-replace[1] for more information.
439 We divide git into high level ("porcelain") commands and low level
440 ("plumbing") commands.
442 High-level commands (porcelain)
443 -------------------------------
445 We separate the porcelain commands into the main commands and some
446 ancillary user utilities.
448 Main porcelain commands
449 ~~~~~~~~~~~~~~~~~~~~~~~
451 include::cmds-mainporcelain.txt[]
457 include::cmds-ancillarymanipulators.txt[]
461 include::cmds-ancillaryinterrogators.txt[]
464 Interacting with Others
465 ~~~~~~~~~~~~~~~~~~~~~~~
467 These commands are to interact with foreign SCM and with other
468 people via patch over e-mail.
470 include::cmds-foreignscminterface.txt[]
473 Low-level commands (plumbing)
474 -----------------------------
476 Although git includes its
477 own porcelain layer, its low-level commands are sufficient to support
478 development of alternative porcelains. Developers of such porcelains
479 might start by reading about linkgit:git-update-index[1] and
480 linkgit:git-read-tree[1].
482 The interface (input, output, set of options and the semantics)
483 to these low-level commands are meant to be a lot more stable
484 than Porcelain level commands, because these commands are
485 primarily for scripted use. The interface to Porcelain commands
486 on the other hand are subject to change in order to improve the
489 The following description divides
490 the low-level commands into commands that manipulate objects (in
491 the repository, index, and working tree), commands that interrogate and
492 compare objects, and commands that move objects and references between
496 Manipulation commands
497 ~~~~~~~~~~~~~~~~~~~~~
499 include::cmds-plumbingmanipulators.txt[]
502 Interrogation commands
503 ~~~~~~~~~~~~~~~~~~~~~~
505 include::cmds-plumbinginterrogators.txt[]
507 In general, the interrogate commands do not touch the files in
511 Synching repositories
512 ~~~~~~~~~~~~~~~~~~~~~
514 include::cmds-synchingrepositories.txt[]
516 The following are helper commands used by the above; end users
517 typically do not use them directly.
519 include::cmds-synchelpers.txt[]
522 Internal helper commands
523 ~~~~~~~~~~~~~~~~~~~~~~~~
525 These are internal helper commands used by other commands; end
526 users typically do not use them directly.
528 include::cmds-purehelpers.txt[]
531 Configuration Mechanism
532 -----------------------
534 Starting from 0.99.9 (actually mid 0.99.8.GIT), `.git/config` file
535 is used to hold per-repository configuration options. It is a
536 simple text file modeled after `.ini` format familiar to some
537 people. Here is an example:
541 # A '#' or ';' character indicates a comment.
546 ; Don't trust file modes
551 name = "Junio C Hamano"
552 email = "junkio@twinsun.com"
556 Various commands read from the configuration file and adjust
557 their operation accordingly. See linkgit:git-config[1] for a
561 Identifier Terminology
562 ----------------------
564 Indicates the object name for any type of object.
567 Indicates a blob object name.
570 Indicates a tree object name.
573 Indicates a commit object name.
576 Indicates a tree, commit or tag object name. A
577 command that takes a <tree-ish> argument ultimately wants to
578 operate on a <tree> object but automatically dereferences
579 <commit> and <tag> objects that point at a <tree>.
582 Indicates a commit or tag object name. A
583 command that takes a <commit-ish> argument ultimately wants to
584 operate on a <commit> object but automatically dereferences
585 <tag> objects that point at a <commit>.
588 Indicates that an object type is required.
589 Currently one of: `blob`, `tree`, `commit`, or `tag`.
592 Indicates a filename - almost always relative to the
593 root of the tree structure `GIT_INDEX_FILE` describes.
597 Any git command accepting any <object> can also use the following
601 indicates the head of the current branch.
605 (i.e. a `refs/tags/<tag>` reference).
609 (i.e. a `refs/heads/<head>` reference).
611 For a more complete list of ways to spell object names, see
612 "SPECIFYING REVISIONS" section in linkgit:gitrevisions[7].
615 File/Directory Structure
616 ------------------------
618 Please see the linkgit:gitrepository-layout[5] document.
620 Read linkgit:githooks[5] for more details about each hook.
622 Higher level SCMs may provide and manage additional information in the
628 Please see linkgit:gitglossary[7].
631 Environment Variables
632 ---------------------
633 Various git commands use the following environment variables:
637 These environment variables apply to 'all' core git commands. Nb: it
638 is worth noting that they may be used/overridden by SCMS sitting above
639 git so take care if using Cogito etc.
642 This environment allows the specification of an alternate
643 index file. If not specified, the default of `$GIT_DIR/index`
646 'GIT_OBJECT_DIRECTORY'::
647 If the object storage directory is specified via this
648 environment variable then the sha1 directories are created
649 underneath - otherwise the default `$GIT_DIR/objects`
652 'GIT_ALTERNATE_OBJECT_DIRECTORIES'::
653 Due to the immutable nature of git objects, old objects can be
654 archived into shared, read-only directories. This variable
655 specifies a ":" separated (on Windows ";" separated) list
656 of git object directories which can be used to search for git
657 objects. New objects will not be written to these directories.
660 If the 'GIT_DIR' environment variable is set then it
661 specifies a path to use instead of the default `.git`
662 for the base of the repository.
663 The '--git-dir' command-line option also sets this value.
666 Set the path to the working tree. The value will not be
667 used in combination with repositories found automatically in
668 a .git directory (i.e. $GIT_DIR is not set).
669 This can also be controlled by the '--work-tree' command line
670 option and the core.worktree configuration variable.
673 Set the git namespace; see linkgit:gitnamespaces[7] for details.
674 The '--namespace' command-line option also sets this value.
676 'GIT_CEILING_DIRECTORIES'::
677 This should be a colon-separated list of absolute paths.
678 If set, it is a list of directories that git should not chdir
679 up into while looking for a repository directory.
680 It will not exclude the current working directory or
681 a GIT_DIR set on the command line or in the environment.
682 (Useful for excluding slow-loading network directories.)
684 'GIT_DISCOVERY_ACROSS_FILESYSTEM'::
685 When run in a directory that does not have ".git" repository
686 directory, git tries to find such a directory in the parent
687 directories to find the top of the working tree, but by default it
688 does not cross filesystem boundaries. This environment variable
689 can be set to true to tell git not to stop at filesystem
690 boundaries. Like 'GIT_CEILING_DIRECTORIES', this will not affect
691 an explicit repository directory set via 'GIT_DIR' or on the
699 'GIT_COMMITTER_NAME'::
700 'GIT_COMMITTER_EMAIL'::
701 'GIT_COMMITTER_DATE'::
703 see linkgit:git-commit-tree[1]
708 Only valid setting is "--unified=??" or "-u??" to set the
709 number of context lines shown when a unified diff is created.
710 This takes precedence over any "-U" or "--unified" option
711 value passed on the git diff command line.
713 'GIT_EXTERNAL_DIFF'::
714 When the environment variable 'GIT_EXTERNAL_DIFF' is set, the
715 program named by it is called, instead of the diff invocation
716 described above. For a path that is added, removed, or modified,
717 'GIT_EXTERNAL_DIFF' is called with 7 parameters:
719 path old-file old-hex old-mode new-file new-hex new-mode
723 <old|new>-file:: are files GIT_EXTERNAL_DIFF can use to read the
724 contents of <old|new>,
725 <old|new>-hex:: are the 40-hexdigit SHA1 hashes,
726 <old|new>-mode:: are the octal representation of the file modes.
728 The file parameters can point at the user's working file
729 (e.g. `new-file` in "git-diff-files"), `/dev/null` (e.g. `old-file`
730 when a new file is added), or a temporary file (e.g. `old-file` in the
731 index). 'GIT_EXTERNAL_DIFF' should not worry about unlinking the
732 temporary file --- it is removed when 'GIT_EXTERNAL_DIFF' exits.
734 For a path that is unmerged, 'GIT_EXTERNAL_DIFF' is called with 1
739 'GIT_MERGE_VERBOSITY'::
740 A number controlling the amount of output shown by
741 the recursive merge strategy. Overrides merge.verbosity.
742 See linkgit:git-merge[1]
745 This environment variable overrides `$PAGER`. If it is set
746 to an empty string or to the value "cat", git will not launch
747 a pager. See also the `core.pager` option in
748 linkgit:git-config[1].
751 This environment variable overrides `$EDITOR` and `$VISUAL`.
752 It is used by several git commands when, on interactive mode,
753 an editor is to be launched. See also linkgit:git-var[1]
754 and the `core.editor` option in linkgit:git-config[1].
757 If this environment variable is set then 'git fetch'
758 and 'git push' will use this command instead
759 of 'ssh' when they need to connect to a remote system.
760 The '$GIT_SSH' command will be given exactly two arguments:
761 the 'username@host' (or just 'host') from the URL and the
762 shell command to execute on that remote system.
764 To pass options to the program that you want to list in GIT_SSH
765 you will need to wrap the program and options into a shell script,
766 then set GIT_SSH to refer to the shell script.
768 Usually it is easier to configure any desired options through your
769 personal `.ssh/config` file. Please consult your ssh documentation
773 If this environment variable is set, then git commands which need to
774 acquire passwords or passphrases (e.g. for HTTP or IMAP authentication)
775 will call this program with a suitable prompt as command line argument
776 and read the password from its STDOUT. See also the 'core.askpass'
777 option in linkgit:git-config[1].
779 'GIT_CONFIG_NOSYSTEM'::
780 Whether to skip reading settings from the system-wide
781 `$(prefix)/etc/gitconfig` file. This environment variable can
782 be used along with `$HOME` and `$XDG_CONFIG_HOME` to create a
783 predictable environment for a picky script, or you can set it
784 temporarily to avoid using a buggy `/etc/gitconfig` file while
785 waiting for someone with sufficient permissions to fix it.
788 If this environment variable is set to "1", then commands such
789 as 'git blame' (in incremental mode), 'git rev-list', 'git log',
790 and 'git whatchanged' will force a flush of the output stream
791 after each commit-oriented record have been flushed. If this
792 variable is set to "0", the output of these commands will be done
793 using completely buffered I/O. If this environment variable is
794 not set, git will choose buffered or record-oriented flushing
795 based on whether stdout appears to be redirected to a file or not.
798 If this variable is set to "1", "2" or "true" (comparison
799 is case insensitive), git will print `trace:` messages on
800 stderr telling about alias expansion, built-in command
801 execution and external command execution.
802 If this variable is set to an integer value greater than 1
803 and lower than 10 (strictly) then git will interpret this
804 value as an open file descriptor and will try to write the
805 trace messages into this file descriptor.
806 Alternatively, if this variable is set to an absolute path
807 (starting with a '/' character), git will interpret this
808 as a file path and will try to write the trace messages
811 Discussion[[Discussion]]
812 ------------------------
814 More detail on the following is available from the
815 link:user-manual.html#git-concepts[git concepts chapter of the
816 user-manual] and linkgit:gitcore-tutorial[7].
818 A git project normally consists of a working directory with a ".git"
819 subdirectory at the top level. The .git directory contains, among other
820 things, a compressed object database representing the complete history
821 of the project, an "index" file which links that history to the current
822 contents of the working tree, and named pointers into that history such
823 as tags and branch heads.
825 The object database contains objects of three main types: blobs, which
826 hold file data; trees, which point to blobs and other trees to build up
827 directory hierarchies; and commits, which each reference a single tree
828 and some number of parent commits.
830 The commit, equivalent to what other systems call a "changeset" or
831 "version", represents a step in the project's history, and each parent
832 represents an immediately preceding step. Commits with more than one
833 parent represent merges of independent lines of development.
835 All objects are named by the SHA1 hash of their contents, normally
836 written as a string of 40 hex digits. Such names are globally unique.
837 The entire history leading up to a commit can be vouched for by signing
838 just that commit. A fourth object type, the tag, is provided for this
841 When first created, objects are stored in individual files, but for
842 efficiency may later be compressed together into "pack files".
844 Named pointers called refs mark interesting points in history. A ref
845 may contain the SHA1 name of an object or the name of another ref. Refs
846 with names beginning `ref/head/` contain the SHA1 name of the most
847 recent commit (or "head") of a branch under development. SHA1 names of
848 tags of interest are stored under `ref/tags/`. A special ref named
849 `HEAD` contains the name of the currently checked-out branch.
851 The index file is initialized with a list of all paths and, for each
852 path, a blob object and a set of attributes. The blob object represents
853 the contents of the file as of the head of the current branch. The
854 attributes (last modified time, size, etc.) are taken from the
855 corresponding file in the working tree. Subsequent changes to the
856 working tree can be found by comparing these attributes. The index may
857 be updated with new content, and new commits may be created from the
858 content stored in the index.
860 The index is also capable of storing multiple entries (called "stages")
861 for a given pathname. These stages are used to hold the various
862 unmerged version of a file when a merge is in progress.
864 FURTHER DOCUMENTATION
865 ---------------------
867 See the references in the "description" section to get started
868 using git. The following is probably more detail than necessary
869 for a first-time user.
871 The link:user-manual.html#git-concepts[git concepts chapter of the
872 user-manual] and linkgit:gitcore-tutorial[7] both provide
873 introductions to the underlying git architecture.
875 See linkgit:gitworkflows[7] for an overview of recommended workflows.
877 See also the link:howto-index.html[howto] documents for some useful
880 The internals are documented in the
881 link:technical/api-index.html[GIT API documentation].
883 Users migrating from CVS may also want to
884 read linkgit:gitcvs-migration[7].
889 Git was started by Linus Torvalds, and is currently maintained by Junio
890 C Hamano. Numerous contributions have come from the git mailing list
891 <git@vger.kernel.org>. http://www.ohloh.net/p/git/contributors/summary
892 gives you a more complete list of contributors.
894 If you have a clone of git.git itself, the
895 output of linkgit:git-shortlog[1] and linkgit:git-blame[1] can show you
896 the authors for specific parts of the project.
901 Report bugs to the Git mailing list <git@vger.kernel.org> where the
902 development and maintenance is primarily done. You do not have to be
903 subscribed to the list to send a message there.
907 linkgit:gittutorial[7], linkgit:gittutorial-2[7],
908 link:everyday.html[Everyday Git], linkgit:gitcvs-migration[7],
909 linkgit:gitglossary[7], linkgit:gitcore-tutorial[7],
910 linkgit:gitcli[7], link:user-manual.html[The Git User's Manual],
911 linkgit:gitworkflows[7]
915 Part of the linkgit:git[1] suite