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1 | git-p4(1) |
2 | ========= | |
3 | ||
4 | NAME | |
5 | ---- | |
6 | git-p4 - Import from and submit to Perforce repositories | |
7 | ||
8 | ||
9 | SYNOPSIS | |
10 | -------- | |
11 | [verse] | |
12 | 'git p4 clone' [<sync options>] [<clone options>] <p4 depot path>... | |
13 | 'git p4 sync' [<sync options>] [<p4 depot path>...] | |
14 | 'git p4 rebase' | |
15 | 'git p4 submit' [<submit options>] [<master branch name>] | |
16 | ||
17 | ||
18 | DESCRIPTION | |
19 | ----------- | |
20 | This command provides a way to interact with p4 repositories | |
21 | using git. | |
22 | ||
23 | Create a new git repository from an existing p4 repository using | |
24 | 'git p4 clone', giving it one or more p4 depot paths. Incorporate | |
25 | new commits from p4 changes with 'git p4 sync'. The 'sync' command | |
26 | is also used to include new branches from other p4 depot paths. | |
27 | Submit git changes back to p4 using 'git p4 submit'. The command | |
28 | 'git p4 rebase' does a sync plus rebases the current branch onto | |
29 | the updated p4 remote branch. | |
30 | ||
31 | ||
32 | EXAMPLE | |
33 | ------- | |
6679c34c PW |
34 | * Clone a repository: |
35 | + | |
36 | ------------ | |
37 | $ git p4 clone //depot/path/project | |
38 | ------------ | |
39 | ||
40 | * Do some work in the newly created git repository: | |
41 | + | |
42 | ------------ | |
43 | $ cd project | |
44 | $ vi foo.h | |
45 | $ git commit -a -m "edited foo.h" | |
46 | ------------ | |
47 | ||
48 | * Update the git repository with recent changes from p4, rebasing your | |
49 | work on top: | |
50 | + | |
51 | ------------ | |
52 | $ git p4 rebase | |
53 | ------------ | |
54 | ||
55 | * Submit your commits back to p4: | |
56 | + | |
57 | ------------ | |
58 | $ git p4 submit | |
59 | ------------ | |
60 | ||
61 | ||
62 | COMMANDS | |
63 | -------- | |
64 | ||
65 | Clone | |
66 | ~~~~~ | |
67 | Generally, 'git p4 clone' is used to create a new git directory | |
68 | from an existing p4 repository: | |
69 | ------------ | |
70 | $ git p4 clone //depot/path/project | |
71 | ------------ | |
72 | This: | |
73 | ||
74 | 1. Creates an empty git repository in a subdirectory called 'project'. | |
75 | + | |
76 | 2. Imports the full contents of the head revision from the given p4 | |
77 | depot path into a single commit in the git branch 'refs/remotes/p4/master'. | |
78 | + | |
79 | 3. Creates a local branch, 'master' from this remote and checks it out. | |
80 | ||
81 | To reproduce the entire p4 history in git, use the '@all' modifier on | |
82 | the depot path: | |
83 | ------------ | |
84 | $ git p4 clone //depot/path/project@all | |
85 | ------------ | |
86 | ||
87 | ||
88 | Sync | |
89 | ~~~~ | |
90 | As development continues in the p4 repository, those changes can | |
91 | be included in the git repository using: | |
92 | ------------ | |
93 | $ git p4 sync | |
94 | ------------ | |
95 | This command finds new changes in p4 and imports them as git commits. | |
96 | ||
97 | P4 repositories can be added to an existing git repository using | |
98 | 'git p4 sync' too: | |
99 | ------------ | |
100 | $ mkdir repo-git | |
101 | $ cd repo-git | |
102 | $ git init | |
103 | $ git p4 sync //path/in/your/perforce/depot | |
104 | ------------ | |
105 | This imports the specified depot into | |
106 | 'refs/remotes/p4/master' in an existing git repository. The | |
107 | '--branch' option can be used to specify a different branch to | |
108 | be used for the p4 content. | |
109 | ||
110 | If a git repository includes branches 'refs/remotes/origin/p4', these | |
111 | will be fetched and consulted first during a 'git p4 sync'. Since | |
112 | importing directly from p4 is considerably slower than pulling changes | |
113 | from a git remote, this can be useful in a multi-developer environment. | |
114 | ||
115 | ||
116 | Rebase | |
117 | ~~~~~~ | |
118 | A common working pattern is to fetch the latest changes from the p4 depot | |
119 | and merge them with local uncommitted changes. Often, the p4 repository | |
120 | is the ultimate location for all code, thus a rebase workflow makes | |
121 | sense. This command does 'git p4 sync' followed by 'git rebase' to move | |
122 | local commits on top of updated p4 changes. | |
123 | ------------ | |
124 | $ git p4 rebase | |
125 | ------------ | |
126 | ||
127 | ||
128 | Submit | |
129 | ~~~~~~ | |
130 | Submitting changes from a git repository back to the p4 repository | |
131 | requires a separate p4 client workspace. This should be specified | |
132 | using the 'P4CLIENT' environment variable or the git configuration | |
133 | variable 'git-p4.client'. The p4 client must exist, but the client root | |
134 | will be created and populated if it does not already exist. | |
135 | ||
136 | To submit all changes that are in the current git branch but not in | |
137 | the 'p4/master' branch, use: | |
138 | ------------ | |
139 | $ git p4 submit | |
140 | ------------ | |
141 | ||
142 | To specify a branch other than the current one, use: | |
143 | ------------ | |
144 | $ git p4 submit topicbranch | |
145 | ------------ | |
146 | ||
147 | The upstream reference is generally 'refs/remotes/p4/master', but can | |
148 | be overridden using the '--origin=' command-line option. | |
149 | ||
150 | The p4 changes will be created as the user invoking 'git p4 submit'. The | |
151 | '--preserve-user' option will cause ownership to be modified | |
152 | according to the author of the git commit. This option requires admin | |
153 | privileges in p4, which can be granted using 'p4 protect'. | |
154 | ||
155 | ||
156 | OPTIONS | |
157 | ------- | |
158 | ||
159 | General options | |
160 | ~~~~~~~~~~~~~~~ | |
6a10b6aa | 161 | All commands except clone accept these options. |
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162 | |
163 | --git-dir <dir>:: | |
164 | Set the 'GIT_DIR' environment variable. See linkgit:git[1]. | |
165 | ||
b0ccc80d | 166 | --verbose, -v:: |
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167 | Provide more progress information. |
168 | ||
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169 | Sync options |
170 | ~~~~~~~~~~~~ | |
171 | These options can be used in the initial 'clone' as well as in | |
172 | subsequent 'sync' operations. | |
173 | ||
174 | --branch <branch>:: | |
175 | Import changes into given branch. If the branch starts with | |
176 | 'refs/', it will be used as is, otherwise the path 'refs/heads/' | |
1471c6b1 PW |
177 | will be prepended. The default branch is 'master'. If used |
178 | with an initial clone, no HEAD will be checked out. | |
179 | + | |
180 | This example imports a new remote "p4/proj2" into an existing | |
181 | git repository: | |
41925d58 | 182 | + |
1471c6b1 PW |
183 | ---- |
184 | $ git init | |
185 | $ git p4 sync --branch=refs/remotes/p4/proj2 //depot/proj2 | |
186 | ---- | |
6679c34c PW |
187 | |
188 | --detect-branches:: | |
189 | Use the branch detection algorithm to find new paths in p4. It is | |
190 | documented below in "BRANCH DETECTION". | |
191 | ||
192 | --changesfile <file>:: | |
193 | Import exactly the p4 change numbers listed in 'file', one per | |
194 | line. Normally, 'git p4' inspects the current p4 repository | |
195 | state and detects the changes it should import. | |
196 | ||
197 | --silent:: | |
198 | Do not print any progress information. | |
199 | ||
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200 | --detect-labels:: |
201 | Query p4 for labels associated with the depot paths, and add | |
06804c76 LD |
202 | them as tags in git. Limited usefulness as only imports labels |
203 | associated with new changelists. Deprecated. | |
204 | ||
205 | --import-labels:: | |
206 | Import labels from p4 into git. | |
6679c34c PW |
207 | |
208 | --import-local:: | |
209 | By default, p4 branches are stored in 'refs/remotes/p4/', | |
210 | where they will be treated as remote-tracking branches by | |
211 | linkgit:git-branch[1] and other commands. This option instead | |
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212 | puts p4 branches in 'refs/heads/p4/'. Note that future |
213 | sync operations must specify '--import-local' as well so that | |
214 | they can find the p4 branches in refs/heads. | |
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215 | |
216 | --max-changes <n>:: | |
217 | Limit the number of imported changes to 'n'. Useful to | |
218 | limit the amount of history when using the '@all' p4 revision | |
219 | specifier. | |
220 | ||
221 | --keep-path:: | |
222 | The mapping of file names from the p4 depot path to git, by | |
223 | default, involves removing the entire depot path. With this | |
224 | option, the full p4 depot path is retained in git. For example, | |
225 | path '//depot/main/foo/bar.c', when imported from | |
226 | '//depot/main/', becomes 'foo/bar.c'. With '--keep-path', the | |
227 | git path is instead 'depot/main/foo/bar.c'. | |
228 | ||
229 | --use-client-spec:: | |
230 | Use a client spec to find the list of interesting files in p4. | |
896a6816 | 231 | See the "CLIENT SPEC" section below. |
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232 | |
233 | Clone options | |
234 | ~~~~~~~~~~~~~ | |
235 | These options can be used in an initial 'clone', along with the 'sync' | |
236 | options described above. | |
237 | ||
238 | --destination <directory>:: | |
239 | Where to create the git repository. If not provided, the last | |
240 | component in the p4 depot path is used to create a new | |
241 | directory. | |
242 | ||
243 | --bare:: | |
244 | Perform a bare clone. See linkgit:git-clone[1]. | |
245 | ||
246 | -/ <path>:: | |
247 | Exclude selected depot paths when cloning. | |
248 | ||
249 | Submit options | |
250 | ~~~~~~~~~~~~~~ | |
251 | These options can be used to modify 'git p4 submit' behavior. | |
252 | ||
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253 | --origin <commit>:: |
254 | Upstream location from which commits are identified to submit to | |
255 | p4. By default, this is the most recent p4 commit reachable | |
256 | from 'HEAD'. | |
257 | ||
84cb0003 | 258 | -M:: |
6679c34c | 259 | Detect renames. See linkgit:git-diff[1]. Renames will be |
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260 | represented in p4 using explicit 'move' operations. There |
261 | is no corresponding option to detect copies, but there are | |
262 | variables for both moves and copies. | |
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263 | |
264 | --preserve-user:: | |
265 | Re-author p4 changes before submitting to p4. This option | |
266 | requires p4 admin privileges. | |
267 | ||
c8942a22 | 268 | --export-labels:: |
06804c76 LD |
269 | Export tags from git as p4 labels. Tags found in git are applied |
270 | to the perforce working directory. | |
271 | ||
ef739f08 PW |
272 | --dry-run, -n:: |
273 | Show just what commits would be submitted to p4; do not change | |
274 | state in git or p4. | |
275 | ||
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276 | --prepare-p4-only:: |
277 | Apply a commit to the p4 workspace, opening, adding and deleting | |
278 | files in p4 as for a normal submit operation. Do not issue the | |
279 | final "p4 submit", but instead print a message about how to | |
280 | submit manually or revert. This option always stops after the | |
281 | first (oldest) commit. Git tags are not exported to p4. | |
282 | ||
6bbfd137 PW |
283 | --conflict=(ask|skip|quit):: |
284 | Conflicts can occur when applying a commit to p4. When this | |
285 | happens, the default behavior ("ask") is to prompt whether to | |
286 | skip this commit and continue, or quit. This option can be used | |
287 | to bypass the prompt, causing conflicting commits to be automatically | |
288 | skipped, or to quit trying to apply commits, without prompting. | |
289 | ||
06804c76 LD |
290 | Rebase options |
291 | ~~~~~~~~~~~~~~ | |
292 | These options can be used to modify 'git p4 rebase' behavior. | |
293 | ||
294 | --import-labels:: | |
295 | Import p4 labels. | |
6679c34c PW |
296 | |
297 | DEPOT PATH SYNTAX | |
298 | ----------------- | |
299 | The p4 depot path argument to 'git p4 sync' and 'git p4 clone' can | |
300 | be one or more space-separated p4 depot paths, with an optional | |
301 | p4 revision specifier on the end: | |
302 | ||
303 | "//depot/my/project":: | |
304 | Import one commit with all files in the '#head' change under that tree. | |
305 | ||
306 | "//depot/my/project@all":: | |
307 | Import one commit for each change in the history of that depot path. | |
308 | ||
309 | "//depot/my/project@1,6":: | |
310 | Import only changes 1 through 6. | |
311 | ||
da191d15 PW |
312 | "//depot/proj1@all //depot/proj2@all":: |
313 | Import all changes from both named depot paths into a single | |
314 | repository. Only files below these directories are included. | |
315 | There is not a subdirectory in git for each "proj1" and "proj2". | |
316 | You must use the '--destination' option when specifying more | |
317 | than one depot path. The revision specifier must be specified | |
318 | identically on each depot path. If there are files in the | |
319 | depot paths with the same name, the path with the most recently | |
320 | updated version of the file is the one that appears in git. | |
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321 | |
322 | See 'p4 help revisions' for the full syntax of p4 revision specifiers. | |
323 | ||
324 | ||
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325 | CLIENT SPEC |
326 | ----------- | |
327 | The p4 client specification is maintained with the 'p4 client' command | |
328 | and contains among other fields, a View that specifies how the depot | |
a93d33ee PW |
329 | is mapped into the client repository. The 'clone' and 'sync' commands |
330 | can consult the client spec when given the '--use-client-spec' option or | |
331 | when the useClientSpec variable is true. After 'git p4 clone', the | |
332 | useClientSpec variable is automatically set in the repository | |
333 | configuration file. This allows future 'git p4 submit' commands to | |
334 | work properly; the submit command looks only at the variable and does | |
335 | not have a command-line option. | |
896a6816 | 336 | |
b6f93057 | 337 | The full syntax for a p4 view is documented in 'p4 help views'. 'Git p4' |
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338 | knows only a subset of the view syntax. It understands multi-line |
339 | mappings, overlays with '+', exclusions with '-' and double-quotes | |
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340 | around whitespace. Of the possible wildcards, 'git p4' only handles |
341 | '...', and only when it is at the end of the path. 'Git p4' will complain | |
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342 | if it encounters an unhandled wildcard. |
343 | ||
42d8c279 PW |
344 | Bugs in the implementation of overlap mappings exist. If multiple depot |
345 | paths map through overlays to the same location in the repository, | |
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346 | 'git p4' can choose the wrong one. This is hard to solve without |
347 | dedicating a client spec just for 'git p4'. | |
42d8c279 | 348 | |
b6f93057 | 349 | The name of the client can be given to 'git p4' in multiple ways. The |
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350 | variable 'git-p4.client' takes precedence if it exists. Otherwise, |
351 | normal p4 mechanisms of determining the client are used: environment | |
352 | variable P4CLIENT, a file referenced by P4CONFIG, or the local host name. | |
353 | ||
354 | ||
6679c34c PW |
355 | BRANCH DETECTION |
356 | ---------------- | |
357 | P4 does not have the same concept of a branch as git. Instead, | |
358 | p4 organizes its content as a directory tree, where by convention | |
359 | different logical branches are in different locations in the tree. | |
360 | The 'p4 branch' command is used to maintain mappings between | |
361 | different areas in the tree, and indicate related content. 'git p4' | |
362 | can use these mappings to determine branch relationships. | |
363 | ||
364 | If you have a repository where all the branches of interest exist as | |
365 | subdirectories of a single depot path, you can use '--detect-branches' | |
366 | when cloning or syncing to have 'git p4' automatically find | |
367 | subdirectories in p4, and to generate these as branches in git. | |
368 | ||
369 | For example, if the P4 repository structure is: | |
370 | ---- | |
371 | //depot/main/... | |
372 | //depot/branch1/... | |
373 | ---- | |
374 | ||
375 | And "p4 branch -o branch1" shows a View line that looks like: | |
376 | ---- | |
377 | //depot/main/... //depot/branch1/... | |
378 | ---- | |
379 | ||
380 | Then this 'git p4 clone' command: | |
381 | ---- | |
382 | git p4 clone --detect-branches //depot@all | |
383 | ---- | |
384 | produces a separate branch in 'refs/remotes/p4/' for //depot/main, | |
385 | called 'master', and one for //depot/branch1 called 'depot/branch1'. | |
386 | ||
387 | However, it is not necessary to create branches in p4 to be able to use | |
388 | them like branches. Because it is difficult to infer branch | |
389 | relationships automatically, a git configuration setting | |
390 | 'git-p4.branchList' can be used to explicitly identify branch | |
391 | relationships. It is a list of "source:destination" pairs, like a | |
392 | simple p4 branch specification, where the "source" and "destination" are | |
393 | the path elements in the p4 repository. The example above relied on the | |
394 | presence of the p4 branch. Without p4 branches, the same result will | |
395 | occur with: | |
396 | ---- | |
397 | git config git-p4.branchList main:branch1 | |
398 | git p4 clone --detect-branches //depot@all | |
399 | ---- | |
400 | ||
401 | ||
402 | PERFORMANCE | |
403 | ----------- | |
404 | The fast-import mechanism used by 'git p4' creates one pack file for | |
405 | each invocation of 'git p4 sync'. Normally, git garbage compression | |
406 | (linkgit:git-gc[1]) automatically compresses these to fewer pack files, | |
407 | but explicit invocation of 'git repack -adf' may improve performance. | |
408 | ||
409 | ||
410 | CONFIGURATION VARIABLES | |
411 | ----------------------- | |
412 | The following config settings can be used to modify 'git p4' behavior. | |
413 | They all are in the 'git-p4' section. | |
414 | ||
415 | General variables | |
416 | ~~~~~~~~~~~~~~~~~ | |
417 | git-p4.user:: | |
418 | User specified as an option to all p4 commands, with '-u <user>'. | |
419 | The environment variable 'P4USER' can be used instead. | |
420 | ||
421 | git-p4.password:: | |
422 | Password specified as an option to all p4 commands, with | |
423 | '-P <password>'. | |
424 | The environment variable 'P4PASS' can be used instead. | |
425 | ||
426 | git-p4.port:: | |
427 | Port specified as an option to all p4 commands, with | |
428 | '-p <port>'. | |
429 | The environment variable 'P4PORT' can be used instead. | |
430 | ||
431 | git-p4.host:: | |
432 | Host specified as an option to all p4 commands, with | |
433 | '-h <host>'. | |
434 | The environment variable 'P4HOST' can be used instead. | |
435 | ||
436 | git-p4.client:: | |
437 | Client specified as an option to all p4 commands, with | |
896a6816 | 438 | '-c <client>', including the client spec. |
6679c34c PW |
439 | |
440 | Clone and sync variables | |
441 | ~~~~~~~~~~~~~~~~~~~~~~~~ | |
442 | git-p4.syncFromOrigin:: | |
443 | Because importing commits from other git repositories is much faster | |
444 | than importing them from p4, a mechanism exists to find p4 changes | |
445 | first in git remotes. If branches exist under 'refs/remote/origin/p4', | |
446 | those will be fetched and used when syncing from p4. This | |
447 | variable can be set to 'false' to disable this behavior. | |
448 | ||
449 | git-p4.branchUser:: | |
450 | One phase in branch detection involves looking at p4 branches | |
451 | to find new ones to import. By default, all branches are | |
452 | inspected. This option limits the search to just those owned | |
453 | by the single user named in the variable. | |
454 | ||
455 | git-p4.branchList:: | |
456 | List of branches to be imported when branch detection is | |
457 | enabled. Each entry should be a pair of branch names separated | |
458 | by a colon (:). This example declares that both branchA and | |
459 | branchB were created from main: | |
41925d58 | 460 | + |
c8942a22 LD |
461 | ------------- |
462 | git config git-p4.branchList main:branchA | |
463 | git config --add git-p4.branchList main:branchB | |
464 | ------------- | |
465 | ||
06804c76 LD |
466 | git-p4.ignoredP4Labels:: |
467 | List of p4 labels to ignore. This is built automatically as | |
468 | unimportable labels are discovered. | |
469 | ||
470 | git-p4.importLabels:: | |
471 | Import p4 labels into git, as per --import-labels. | |
472 | ||
c8942a22 | 473 | git-p4.labelImportRegexp:: |
06804c76 | 474 | Only p4 labels matching this regular expression will be imported. The |
c8942a22 | 475 | default value is '[a-zA-Z0-9_\-.]+$'. |
6679c34c PW |
476 | |
477 | git-p4.useClientSpec:: | |
896a6816 PW |
478 | Specify that the p4 client spec should be used to identify p4 |
479 | depot paths of interest. This is equivalent to specifying the | |
480 | option '--use-client-spec'. See the "CLIENT SPEC" section above. | |
481 | This variable is a boolean, not the name of a p4 client. | |
6679c34c PW |
482 | |
483 | Submit variables | |
484 | ~~~~~~~~~~~~~~~~ | |
485 | git-p4.detectRenames:: | |
84cb0003 GG |
486 | Detect renames. See linkgit:git-diff[1]. This can be true, |
487 | false, or a score as expected by 'git diff -M'. | |
6679c34c PW |
488 | |
489 | git-p4.detectCopies:: | |
84cb0003 GG |
490 | Detect copies. See linkgit:git-diff[1]. This can be true, |
491 | false, or a score as expected by 'git diff -C'. | |
6679c34c PW |
492 | |
493 | git-p4.detectCopiesHarder:: | |
84cb0003 | 494 | Detect copies harder. See linkgit:git-diff[1]. A boolean. |
6679c34c PW |
495 | |
496 | git-p4.preserveUser:: | |
497 | On submit, re-author changes to reflect the git author, | |
498 | regardless of who invokes 'git p4 submit'. | |
499 | ||
500 | git-p4.allowMissingP4Users:: | |
501 | When 'preserveUser' is true, 'git p4' normally dies if it | |
502 | cannot find an author in the p4 user map. This setting | |
503 | submits the change regardless. | |
504 | ||
505 | git-p4.skipSubmitEdit:: | |
506 | The submit process invokes the editor before each p4 change | |
507 | is submitted. If this setting is true, though, the editing | |
508 | step is skipped. | |
509 | ||
510 | git-p4.skipSubmitEditCheck:: | |
511 | After editing the p4 change message, 'git p4' makes sure that | |
512 | the description really was changed by looking at the file | |
513 | modification time. This option disables that test. | |
514 | ||
515 | git-p4.allowSubmit:: | |
516 | By default, any branch can be used as the source for a 'git p4 | |
517 | submit' operation. This configuration variable, if set, permits only | |
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518 | the named branches to be used as submit sources. Branch names |
519 | must be the short names (no "refs/heads/"), and should be | |
520 | separated by commas (","), with no spaces. | |
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521 | |
522 | git-p4.skipUserNameCheck:: | |
523 | If the user running 'git p4 submit' does not exist in the p4 | |
524 | user map, 'git p4' exits. This option can be used to force | |
525 | submission regardless. | |
526 | ||
41925d58 | 527 | git-p4.attemptRCSCleanup:: |
06804c76 LD |
528 | If enabled, 'git p4 submit' will attempt to cleanup RCS keywords |
529 | ($Header$, etc). These would otherwise cause merge conflicts and prevent | |
530 | the submit going ahead. This option should be considered experimental at | |
531 | present. | |
532 | ||
533 | git-p4.exportLabels:: | |
534 | Export git tags to p4 labels, as per --export-labels. | |
535 | ||
c8942a22 | 536 | git-p4.labelExportRegexp:: |
06804c76 | 537 | Only p4 labels matching this regular expression will be exported. The |
c8942a22 | 538 | default value is '[a-zA-Z0-9_\-.]+$'. |
6679c34c | 539 | |
6bbfd137 PW |
540 | git-p4.conflict:: |
541 | Specify submit behavior when a conflict with p4 is found, as per | |
542 | --conflict. The default behavior is 'ask'. | |
543 | ||
6679c34c PW |
544 | IMPLEMENTATION DETAILS |
545 | ---------------------- | |
546 | * Changesets from p4 are imported using git fast-import. | |
547 | * Cloning or syncing does not require a p4 client; file contents are | |
548 | collected using 'p4 print'. | |
549 | * Submitting requires a p4 client, which is not in the same location | |
550 | as the git repository. Patches are applied, one at a time, to | |
551 | this p4 client and submitted from there. | |
552 | * Each commit imported by 'git p4' has a line at the end of the log | |
553 | message indicating the p4 depot location and change number. This | |
554 | line is used by later 'git p4 sync' operations to know which p4 | |
555 | changes are new. |