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41a6d859 CM |
1 | """Python GIT interface |
2 | """ | |
3 | ||
4 | __copyright__ = """ | |
5 | Copyright (C) 2005, Catalin Marinas <catalin.marinas@gmail.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License version 2 as | |
9 | published by the Free Software Foundation. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | """ | |
20 | ||
26dba451 | 21 | import sys, os, glob, popen2 |
41a6d859 CM |
22 | |
23 | from stgit.utils import * | |
24 | ||
25 | # git exception class | |
26 | class GitException(Exception): | |
27 | pass | |
28 | ||
29 | ||
30 | # Different start-up variables read from the environment | |
31 | if 'GIT_DIR' in os.environ: | |
32 | base_dir = os.environ['GIT_DIR'] | |
33 | else: | |
34 | base_dir = '.git' | |
35 | ||
36 | head_link = os.path.join(base_dir, 'HEAD') | |
37 | ||
41a6d859 CM |
38 | # |
39 | # Classes | |
40 | # | |
41 | class Commit: | |
42 | """Handle the commit objects | |
43 | """ | |
44 | def __init__(self, id_hash): | |
45 | self.__id_hash = id_hash | |
41a6d859 | 46 | |
26dba451 | 47 | lines = _output_lines('git-cat-file commit %s' % id_hash) |
37a4d1bf | 48 | self.__parents = [] |
26dba451 BL |
49 | for i in range(len(lines)): |
50 | line = lines[i] | |
41a6d859 CM |
51 | if line == '\n': |
52 | break | |
53 | field = line.strip().split(' ', 1) | |
54 | if field[0] == 'tree': | |
55 | self.__tree = field[1] | |
56 | elif field[0] == 'parent': | |
37a4d1bf | 57 | self.__parents.append(field[1]) |
41a6d859 CM |
58 | if field[0] == 'author': |
59 | self.__author = field[1] | |
dad310d0 | 60 | if field[0] == 'committer': |
41a6d859 | 61 | self.__committer = field[1] |
26dba451 | 62 | self.__log = ''.join(lines[i:]) |
41a6d859 CM |
63 | |
64 | def get_id_hash(self): | |
65 | return self.__id_hash | |
66 | ||
67 | def get_tree(self): | |
68 | return self.__tree | |
69 | ||
70 | def get_parent(self): | |
37a4d1bf CM |
71 | return self.__parents[0] |
72 | ||
73 | def get_parents(self): | |
74 | return self.__parents | |
41a6d859 CM |
75 | |
76 | def get_author(self): | |
77 | return self.__author | |
78 | ||
79 | def get_committer(self): | |
80 | return self.__committer | |
81 | ||
37a4d1bf CM |
82 | def get_log(self): |
83 | return self.__log | |
84 | ||
8e29bcd2 CM |
85 | # dictionary of Commit objects, used to avoid multiple calls to git |
86 | __commits = dict() | |
41a6d859 CM |
87 | |
88 | # | |
89 | # Functions | |
90 | # | |
8e29bcd2 CM |
91 | def get_commit(id_hash): |
92 | """Commit objects factory. Save/look-up them in the __commits | |
93 | dictionary | |
94 | """ | |
95 | if id_hash in __commits: | |
96 | return __commits[id_hash] | |
97 | else: | |
98 | commit = Commit(id_hash) | |
99 | __commits[id_hash] = commit | |
100 | return commit | |
101 | ||
41a6d859 CM |
102 | def get_conflicts(): |
103 | """Return the list of file conflicts | |
104 | """ | |
105 | conflicts_file = os.path.join(base_dir, 'conflicts') | |
106 | if os.path.isfile(conflicts_file): | |
107 | f = file(conflicts_file) | |
108 | names = [line.strip() for line in f.readlines()] | |
109 | f.close() | |
110 | return names | |
111 | else: | |
112 | return None | |
113 | ||
0d2cd1e4 CM |
114 | def _input(cmd, file_desc): |
115 | p = popen2.Popen3(cmd) | |
6fe6b1bd CM |
116 | while True: |
117 | line = file_desc.readline() | |
118 | if not line: | |
119 | break | |
0d2cd1e4 CM |
120 | p.tochild.write(line) |
121 | p.tochild.close() | |
122 | if p.wait(): | |
123 | raise GitException, '%s failed' % str(cmd) | |
124 | ||
26dba451 BL |
125 | def _output(cmd): |
126 | p=popen2.Popen3(cmd) | |
127 | string = p.fromchild.read() | |
128 | if p.wait(): | |
129 | raise GitException, '%s failed' % str(cmd) | |
130 | return string | |
131 | ||
d3cf7d86 | 132 | def _output_one_line(cmd, file_desc = None): |
26dba451 | 133 | p=popen2.Popen3(cmd) |
d3cf7d86 PBG |
134 | if file_desc != None: |
135 | for line in file_desc: | |
136 | p.tochild.write(line) | |
137 | p.tochild.close() | |
26dba451 BL |
138 | string = p.fromchild.readline().strip() |
139 | if p.wait(): | |
140 | raise GitException, '%s failed' % str(cmd) | |
41a6d859 CM |
141 | return string |
142 | ||
26dba451 BL |
143 | def _output_lines(cmd): |
144 | p=popen2.Popen3(cmd) | |
145 | lines = p.fromchild.readlines() | |
146 | if p.wait(): | |
147 | raise GitException, '%s failed' % str(cmd) | |
148 | return lines | |
149 | ||
150 | def __run(cmd, args=None): | |
151 | """__run: runs cmd using spawnvp. | |
152 | ||
153 | Runs cmd using spawnvp. The shell is avoided so it won't mess up | |
154 | our arguments. If args is very large, the command is run multiple | |
155 | times; args is split xargs style: cmd is passed on each | |
156 | invocation. Unlike xargs, returns immediately if any non-zero | |
157 | return code is received. | |
158 | """ | |
159 | ||
160 | args_l=cmd.split() | |
161 | if args is None: | |
162 | args = [] | |
163 | for i in range(0, len(args)+1, 100): | |
164 | r=os.spawnvp(os.P_WAIT, args_l[0], args_l + args[i:min(i+100, len(args))]) | |
165 | if r: | |
166 | return r | |
167 | return 0 | |
168 | ||
41a6d859 CM |
169 | def __check_base_dir(): |
170 | return os.path.isdir(base_dir) | |
171 | ||
be24d874 CM |
172 | def __tree_status(files = [], tree_id = 'HEAD', unknown = False, |
173 | noexclude = True): | |
41a6d859 CM |
174 | """Returns a list of pairs - [status, filename] |
175 | """ | |
7c09df84 | 176 | os.system('git-update-index --refresh > /dev/null') |
41a6d859 CM |
177 | |
178 | cache_files = [] | |
179 | ||
180 | # unknown files | |
181 | if unknown: | |
be24d874 CM |
182 | exclude_file = os.path.join(base_dir, 'info', 'exclude') |
183 | base_exclude = ['--exclude=%s' % s for s in | |
184 | ['*.[ao]', '*.pyc', '.*', '*~', '#*', 'TAGS', 'tags']] | |
185 | base_exclude.append('--exclude-per-directory=.gitignore') | |
186 | ||
41a6d859 | 187 | if os.path.exists(exclude_file): |
3c6fbd2c | 188 | extra_exclude = ['--exclude-from=%s' % exclude_file] |
be24d874 CM |
189 | else: |
190 | extra_exclude = [] | |
4d4c0e3a PBG |
191 | if noexclude: |
192 | extra_exclude = base_exclude = [] | |
be24d874 CM |
193 | |
194 | lines = _output_lines(['git-ls-files', '--others'] + base_exclude | |
4d4c0e3a | 195 | + extra_exclude) |
26dba451 | 196 | cache_files += [('?', line.strip()) for line in lines] |
41a6d859 CM |
197 | |
198 | # conflicted files | |
199 | conflicts = get_conflicts() | |
200 | if not conflicts: | |
201 | conflicts = [] | |
202 | cache_files += [('C', filename) for filename in conflicts] | |
203 | ||
204 | # the rest | |
7c09df84 | 205 | for line in _output_lines(['git-diff-index', '-r', tree_id] + files): |
26dba451 | 206 | fs = tuple(line.rstrip().split(' ',4)[-1].split('\t',1)) |
41a6d859 CM |
207 | if fs[1] not in conflicts: |
208 | cache_files.append(fs) | |
41a6d859 CM |
209 | |
210 | return cache_files | |
211 | ||
212 | def local_changes(): | |
213 | """Return true if there are local changes in the tree | |
214 | """ | |
215 | return len(__tree_status()) != 0 | |
216 | ||
217 | def get_head(): | |
218 | """Returns a string representing the HEAD | |
219 | """ | |
220 | return read_string(head_link) | |
221 | ||
222 | def get_head_file(): | |
223 | """Returns the name of the file pointed to by the HEAD link | |
224 | """ | |
225 | # valid link | |
226 | if os.path.islink(head_link) and os.path.isfile(head_link): | |
227 | return os.path.basename(os.readlink(head_link)) | |
228 | else: | |
229 | raise GitException, 'Invalid .git/HEAD link. Git tree not initialised?' | |
230 | ||
231 | def __set_head(val): | |
232 | """Sets the HEAD value | |
233 | """ | |
234 | write_string(head_link, val) | |
235 | ||
236 | def add(names): | |
237 | """Add the files or recursively add the directory contents | |
238 | """ | |
239 | # generate the file list | |
240 | files = [] | |
241 | for i in names: | |
242 | if not os.path.exists(i): | |
243 | raise GitException, 'Unknown file or directory: %s' % i | |
244 | ||
245 | if os.path.isdir(i): | |
246 | # recursive search. We only add files | |
247 | for root, dirs, local_files in os.walk(i): | |
248 | for name in [os.path.join(root, f) for f in local_files]: | |
249 | if os.path.isfile(name): | |
250 | files.append(os.path.normpath(name)) | |
251 | elif os.path.isfile(i): | |
252 | files.append(os.path.normpath(i)) | |
253 | else: | |
254 | raise GitException, '%s is not a file or directory' % i | |
255 | ||
26dba451 | 256 | if files: |
7c09df84 | 257 | if __run('git-update-index --add --', files): |
26dba451 | 258 | raise GitException, 'Unable to add file' |
41a6d859 CM |
259 | |
260 | def rm(files, force = False): | |
261 | """Remove a file from the repository | |
262 | """ | |
263 | if force: | |
264 | git_opt = '--force-remove' | |
265 | else: | |
266 | git_opt = '--remove' | |
267 | ||
26dba451 BL |
268 | if not force: |
269 | for f in files: | |
270 | if os.path.exists(f): | |
271 | raise GitException, '%s exists. Remove it first' %f | |
272 | if files: | |
7c09df84 | 273 | __run('git-update-index --remove --', files) |
26dba451 BL |
274 | else: |
275 | if files: | |
7c09df84 | 276 | __run('git-update-index --force-remove --', files) |
41a6d859 | 277 | |
402ad990 | 278 | def update_cache(files = [], force = False): |
cfafb945 CM |
279 | """Update the cache information for the given files |
280 | """ | |
402ad990 | 281 | cache_files = __tree_status(files) |
26dba451 | 282 | |
402ad990 CM |
283 | # everything is up-to-date |
284 | if len(cache_files) == 0: | |
285 | return False | |
286 | ||
287 | # check for unresolved conflicts | |
288 | if not force and [x for x in cache_files | |
289 | if x[0] not in ['M', 'N', 'A', 'D']]: | |
290 | raise GitException, 'Updating cache failed: unresolved conflicts' | |
26dba451 | 291 | |
402ad990 CM |
292 | # update the cache |
293 | add_files = [x[1] for x in cache_files if x[0] in ['N', 'A']] | |
294 | rm_files = [x[1] for x in cache_files if x[0] in ['D']] | |
295 | m_files = [x[1] for x in cache_files if x[0] in ['M']] | |
296 | ||
7c09df84 JH |
297 | if add_files and __run('git-update-index --add --', add_files) != 0: |
298 | raise GitException, 'Failed git-update-index --add' | |
299 | if rm_files and __run('git-update-index --force-remove --', rm_files) != 0: | |
300 | raise GitException, 'Failed git-update-index --rm' | |
301 | if m_files and __run('git-update-index --', m_files) != 0: | |
302 | raise GitException, 'Failed git-update-index' | |
402ad990 CM |
303 | |
304 | return True | |
cfafb945 | 305 | |
41a6d859 | 306 | def commit(message, files = [], parents = [], allowempty = False, |
d3cf7d86 | 307 | cache_update = True, tree_id = None, |
41a6d859 CM |
308 | author_name = None, author_email = None, author_date = None, |
309 | committer_name = None, committer_email = None): | |
310 | """Commit the current tree to repository | |
311 | """ | |
41a6d859 | 312 | # Get the tree status |
402ad990 CM |
313 | if cache_update and parents != []: |
314 | changes = update_cache(files) | |
315 | if not changes and not allowempty: | |
316 | raise GitException, 'No changes to commit' | |
41a6d859 CM |
317 | |
318 | # get the commit message | |
d3cf7d86 PBG |
319 | if message[-1:] != '\n': |
320 | message += '\n' | |
41a6d859 | 321 | |
d3cf7d86 | 322 | must_switch = True |
41a6d859 | 323 | # write the index to repository |
d3cf7d86 PBG |
324 | if tree_id == None: |
325 | tree_id = _output_one_line('git-write-tree') | |
326 | else: | |
327 | must_switch = False | |
41a6d859 CM |
328 | |
329 | # the commit | |
330 | cmd = '' | |
331 | if author_name: | |
332 | cmd += 'GIT_AUTHOR_NAME="%s" ' % author_name | |
333 | if author_email: | |
334 | cmd += 'GIT_AUTHOR_EMAIL="%s" ' % author_email | |
335 | if author_date: | |
336 | cmd += 'GIT_AUTHOR_DATE="%s" ' % author_date | |
337 | if committer_name: | |
338 | cmd += 'GIT_COMMITTER_NAME="%s" ' % committer_name | |
339 | if committer_email: | |
340 | cmd += 'GIT_COMMITTER_EMAIL="%s" ' % committer_email | |
341 | cmd += 'git-commit-tree %s' % tree_id | |
342 | ||
343 | # get the parents | |
344 | for p in parents: | |
345 | cmd += ' -p %s' % p | |
346 | ||
d3cf7d86 PBG |
347 | commit_id = _output_one_line(cmd, message) |
348 | if must_switch: | |
349 | __set_head(commit_id) | |
41a6d859 CM |
350 | |
351 | return commit_id | |
352 | ||
353 | def merge(base, head1, head2): | |
354 | """Perform a 3-way merge between base, head1 and head2 into the | |
355 | local tree | |
356 | """ | |
26dba451 | 357 | if __run('git-read-tree -u -m', [base, head1, head2]) != 0: |
41a6d859 CM |
358 | raise GitException, 'git-read-tree failed (local changes maybe?)' |
359 | ||
360 | # this can fail if there are conflicts | |
7c09df84 | 361 | if os.system('git-merge-index -o -q gitmergeonefile.py -a') != 0: |
41a6d859 CM |
362 | raise GitException, 'git-merge-cache failed (possible conflicts)' |
363 | ||
41a6d859 | 364 | def status(files = [], modified = False, new = False, deleted = False, |
4d4c0e3a | 365 | conflict = False, unknown = False, noexclude = False): |
41a6d859 CM |
366 | """Show the tree status |
367 | """ | |
4d4c0e3a | 368 | cache_files = __tree_status(files, unknown = True, noexclude = noexclude) |
41a6d859 CM |
369 | all = not (modified or new or deleted or conflict or unknown) |
370 | ||
371 | if not all: | |
372 | filestat = [] | |
373 | if modified: | |
374 | filestat.append('M') | |
375 | if new: | |
7371951a | 376 | filestat.append('A') |
41a6d859 CM |
377 | filestat.append('N') |
378 | if deleted: | |
379 | filestat.append('D') | |
380 | if conflict: | |
381 | filestat.append('C') | |
382 | if unknown: | |
383 | filestat.append('?') | |
402ad990 | 384 | cache_files = [x for x in cache_files if x[0] in filestat] |
41a6d859 CM |
385 | |
386 | for fs in cache_files: | |
387 | if all: | |
388 | print '%s %s' % (fs[0], fs[1]) | |
389 | else: | |
390 | print '%s' % fs[1] | |
391 | ||
b4bddc06 | 392 | def diff(files = [], rev1 = 'HEAD', rev2 = None, out_fd = None): |
41a6d859 CM |
393 | """Show the diff between rev1 and rev2 |
394 | """ | |
41a6d859 CM |
395 | |
396 | if rev2: | |
b4bddc06 | 397 | diff_str = _output(['git-diff-tree', '-p', rev1, rev2] + files) |
41a6d859 | 398 | else: |
7c09df84 JH |
399 | os.system('git-update-index --refresh > /dev/null') |
400 | diff_str = _output(['git-diff-index', '-p', rev1] + files) | |
b4bddc06 CM |
401 | |
402 | if out_fd: | |
403 | out_fd.write(diff_str) | |
404 | else: | |
405 | return diff_str | |
41a6d859 CM |
406 | |
407 | def diffstat(files = [], rev1 = 'HEAD', rev2 = None): | |
408 | """Return the diffstat between rev1 and rev2 | |
409 | """ | |
41a6d859 | 410 | |
26dba451 BL |
411 | p=popen2.Popen3('git-apply --stat') |
412 | diff(files, rev1, rev2, p.tochild) | |
413 | p.tochild.close() | |
414 | str = p.fromchild.read().rstrip() | |
415 | if p.wait(): | |
416 | raise GitException, 'git.diffstat failed' | |
41a6d859 CM |
417 | return str |
418 | ||
419 | def files(rev1, rev2): | |
420 | """Return the files modified between rev1 and rev2 | |
421 | """ | |
41a6d859 CM |
422 | |
423 | str = '' | |
26dba451 BL |
424 | for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)): |
425 | str += '%s %s\n' % tuple(line.rstrip().split(' ',4)[-1].split('\t',1)) | |
41a6d859 CM |
426 | |
427 | return str.rstrip() | |
428 | ||
faed6770 PBG |
429 | def barefiles(rev1, rev2): |
430 | """Return the files modified between rev1 and rev2, without status info | |
431 | """ | |
432 | ||
433 | str = '' | |
434 | for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)): | |
435 | str += '%s\n' % line.rstrip().split(' ',4)[-1].split('\t',1)[-1] | |
436 | ||
437 | return str.rstrip() | |
438 | ||
1008fbce | 439 | def checkout(files = [], tree_id = None, force = False): |
41a6d859 CM |
440 | """Check out the given or all files |
441 | """ | |
1008fbce CM |
442 | if tree_id and __run('git-read-tree -m', [tree_id]) != 0: |
443 | raise GitException, 'Failed git-read-tree -m %s' % tree_id | |
444 | ||
7c09df84 | 445 | checkout_cmd = 'git-checkout-index -q -u' |
41a6d859 | 446 | if force: |
1008fbce | 447 | checkout_cmd += ' -f' |
41a6d859 | 448 | if len(files) == 0: |
1008fbce | 449 | checkout_cmd += ' -a' |
41a6d859 | 450 | else: |
1008fbce | 451 | checkout_cmd += ' --' |
41a6d859 | 452 | |
1008fbce | 453 | if __run(checkout_cmd, files) != 0: |
7c09df84 | 454 | raise GitException, 'Failed git-checkout-index' |
41a6d859 CM |
455 | |
456 | def switch(tree_id): | |
457 | """Switch the tree to the given id | |
458 | """ | |
a5b29a1c CM |
459 | if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0: |
460 | raise GitException, 'git-read-tree failed (local changes maybe?)' | |
41a6d859 | 461 | |
41a6d859 CM |
462 | __set_head(tree_id) |
463 | ||
05d593c0 CM |
464 | def reset(tree_id = None): |
465 | """Revert the tree changes relative to the given tree_id. It removes | |
466 | any local changes | |
467 | """ | |
468 | if not tree_id: | |
469 | tree_id = get_head() | |
470 | ||
471 | cache_files = __tree_status(tree_id = tree_id) | |
472 | rm_files = [x[1] for x in cache_files if x[0] in ['D']] | |
473 | ||
474 | checkout(tree_id = tree_id, force = True) | |
475 | __set_head(tree_id) | |
476 | ||
477 | # checkout doesn't remove files | |
478 | map(os.remove, rm_files) | |
479 | ||
1f5e9148 CM |
480 | def pull(repository = 'origin', refspec = None): |
481 | """Pull changes from the remote repository. At the moment, just | |
482 | use the 'git pull' command | |
f338c3c0 | 483 | """ |
1f5e9148 CM |
484 | args = [repository] |
485 | if refspec: | |
486 | args.append(refspec) | |
f338c3c0 | 487 | |
ddbbfd84 | 488 | if __run('git pull', args) != 0: |
1f5e9148 | 489 | raise GitException, 'Failed "git pull %s"' % repository |
f338c3c0 | 490 | |
0d2cd1e4 CM |
491 | def apply_patch(filename = None): |
492 | """Apply a patch onto the current index. There must not be any | |
493 | local changes in the tree, otherwise the command fails | |
494 | """ | |
7c09df84 | 495 | os.system('git-update-index --refresh > /dev/null') |
0d2cd1e4 CM |
496 | |
497 | if filename: | |
498 | if __run('git-apply --index', [filename]) != 0: | |
499 | raise GitException, 'Patch does not apply cleanly' | |
500 | else: | |
501 | _input('git-apply --index', sys.stdin) | |
1008fbce CM |
502 | |
503 | def clone(repository, local_dir): | |
504 | """Clone a remote repository. At the moment, just use the | |
505 | 'git clone' script | |
506 | """ | |
507 | if __run('git clone', [repository, local_dir]) != 0: | |
508 | raise GitException, 'Failed "git clone %s %s"' \ | |
509 | % (repository, local_dir) |