1 """Python GIT interface
5 Copyright (C) 2005, Catalin Marinas <catalin.marinas@gmail.com>
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.
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.
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
21 import sys, os, glob, popen2
23 from stgit.utils import *
26 class GitException(Exception):
30 # Different start-up variables read from the environment
31 if 'GIT_DIR' in os.environ:
32 base_dir = os.environ['GIT_DIR']
36 head_link = os.path.join(base_dir, 'HEAD')
42 """Handle the commit objects
44 def __init__(self, id_hash):
45 self.__id_hash = id_hash
47 lines = _output_lines('git-cat-file commit %s' % id_hash)
49 for i in range(len(lines)):
53 field = line.strip().split(' ', 1)
54 if field[0] == 'tree':
55 self.__tree = field[1]
56 elif field[0] == 'parent':
57 self.__parents.append(field[1])
58 if field[0] == 'author':
59 self.__author = field[1]
60 if field[0] == 'committer':
61 self.__committer = field[1]
62 self.__log = ''.join(lines[i+1:])
64 def get_id_hash(self):
71 return self.__parents[0]
73 def get_parents(self):
79 def get_committer(self):
80 return self.__committer
85 # dictionary of Commit objects, used to avoid multiple calls to git
91 def get_commit(id_hash):
92 """Commit objects factory. Save/look-up them in the __commits
97 if id_hash in __commits:
98 return __commits[id_hash]
100 commit = Commit(id_hash)
101 __commits[id_hash] = commit
105 """Return the list of file conflicts
107 conflicts_file = os.path.join(base_dir, 'conflicts')
108 if os.path.isfile(conflicts_file):
109 f = file(conflicts_file)
110 names = [line.strip() for line in f.readlines()]
116 def _input(cmd, file_desc):
117 p = popen2.Popen3(cmd)
119 line = file_desc.readline()
122 p.tochild.write(line)
125 raise GitException, '%s failed' % str(cmd)
129 string = p.fromchild.read()
131 raise GitException, '%s failed' % str(cmd)
134 def _output_one_line(cmd, file_desc = None):
136 if file_desc != None:
137 for line in file_desc:
138 p.tochild.write(line)
140 string = p.fromchild.readline().strip()
142 raise GitException, '%s failed' % str(cmd)
145 def _output_lines(cmd):
147 lines = p.fromchild.readlines()
149 raise GitException, '%s failed' % str(cmd)
152 def __run(cmd, args=None):
153 """__run: runs cmd using spawnvp.
155 Runs cmd using spawnvp. The shell is avoided so it won't mess up
156 our arguments. If args is very large, the command is run multiple
157 times; args is split xargs style: cmd is passed on each
158 invocation. Unlike xargs, returns immediately if any non-zero
159 return code is received.
165 for i in range(0, len(args)+1, 100):
166 r=os.spawnvp(os.P_WAIT, args_l[0], args_l + args[i:min(i+100, len(args))])
171 def __check_base_dir():
172 return os.path.isdir(base_dir)
174 def __tree_status(files = [], tree_id = 'HEAD', unknown = False,
176 """Returns a list of pairs - [status, filename]
178 os.system('git-update-index --refresh > /dev/null')
184 exclude_file = os.path.join(base_dir, 'info', 'exclude')
185 base_exclude = ['--exclude=%s' % s for s in
186 ['*.[ao]', '*.pyc', '.*', '*~', '#*', 'TAGS', 'tags']]
187 base_exclude.append('--exclude-per-directory=.gitignore')
189 if os.path.exists(exclude_file):
190 extra_exclude = ['--exclude-from=%s' % exclude_file]
194 extra_exclude = base_exclude = []
196 lines = _output_lines(['git-ls-files', '--others'] + base_exclude
198 cache_files += [('?', line.strip()) for line in lines]
201 conflicts = get_conflicts()
204 cache_files += [('C', filename) for filename in conflicts]
207 for line in _output_lines(['git-diff-index', '-r', tree_id] + files):
208 fs = tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
209 if fs[1] not in conflicts:
210 cache_files.append(fs)
215 """Return true if there are local changes in the tree
217 return len(__tree_status()) != 0
223 """Verifies the HEAD and returns the SHA1 id that represents it
228 __head = rev_parse('HEAD')
232 """Returns the name of the file pointed to by the HEAD link
234 return os.path.basename(_output_one_line('git-symbolic-ref HEAD'))
236 def set_head_file(ref):
237 """Resets HEAD to point to a new ref
239 if __run('git-symbolic-ref HEAD', [ref]) != 0:
240 raise GitException, 'Could not set head to "%s"' % ref
243 """Sets the HEAD value
247 if not __head or __head != val:
248 if __run('git-update-ref HEAD', [val]) != 0:
249 raise GitException, 'Could not update HEAD to "%s".' % val
252 def __clear_head_cache():
253 """Sets the __head to None so that a re-read is forced
259 def rev_parse(git_id):
260 """Parse the string and return a verified SHA1 id
263 return _output_one_line(['git-rev-parse', '--verify', git_id])
265 raise GitException, 'Unknown revision: %s' % git_id
267 def branch_exists(branch):
268 """Existance check for the named branch
270 for line in _output_lines(['git-rev-parse', '--symbolic', '--all']):
271 if line.strip() == branch:
275 def create_branch(new_branch, tree_id = None):
276 """Create a new branch in the git repository
278 new_head = os.path.join('refs', 'heads', new_branch)
279 if branch_exists(new_head):
280 raise GitException, 'Branch "%s" already exists' % new_branch
282 current_head = get_head()
283 set_head_file(new_head)
284 __set_head(current_head)
286 # a checkout isn't needed if new branch points to the current head
290 if os.path.isfile(os.path.join(base_dir, 'MERGE_HEAD')):
291 os.remove(os.path.join(base_dir, 'MERGE_HEAD'))
294 """Add the files or recursively add the directory contents
296 # generate the file list
299 if not os.path.exists(i):
300 raise GitException, 'Unknown file or directory: %s' % i
303 # recursive search. We only add files
304 for root, dirs, local_files in os.walk(i):
305 for name in [os.path.join(root, f) for f in local_files]:
306 if os.path.isfile(name):
307 files.append(os.path.normpath(name))
308 elif os.path.isfile(i):
309 files.append(os.path.normpath(i))
311 raise GitException, '%s is not a file or directory' % i
314 if __run('git-update-index --add --', files):
315 raise GitException, 'Unable to add file'
317 def rm(files, force = False):
318 """Remove a file from the repository
321 git_opt = '--force-remove'
327 if os.path.exists(f):
328 raise GitException, '%s exists. Remove it first' %f
330 __run('git-update-index --remove --', files)
333 __run('git-update-index --force-remove --', files)
335 def update_cache(files = [], force = False):
336 """Update the cache information for the given files
338 cache_files = __tree_status(files)
340 # everything is up-to-date
341 if len(cache_files) == 0:
344 # check for unresolved conflicts
345 if not force and [x for x in cache_files
346 if x[0] not in ['M', 'N', 'A', 'D']]:
347 raise GitException, 'Updating cache failed: unresolved conflicts'
350 add_files = [x[1] for x in cache_files if x[0] in ['N', 'A']]
351 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
352 m_files = [x[1] for x in cache_files if x[0] in ['M']]
354 if add_files and __run('git-update-index --add --', add_files) != 0:
355 raise GitException, 'Failed git-update-index --add'
356 if rm_files and __run('git-update-index --force-remove --', rm_files) != 0:
357 raise GitException, 'Failed git-update-index --rm'
358 if m_files and __run('git-update-index --', m_files) != 0:
359 raise GitException, 'Failed git-update-index'
363 def commit(message, files = [], parents = [], allowempty = False,
364 cache_update = True, tree_id = None,
365 author_name = None, author_email = None, author_date = None,
366 committer_name = None, committer_email = None):
367 """Commit the current tree to repository
369 # Get the tree status
370 if cache_update and parents != []:
371 changes = update_cache(files)
372 if not changes and not allowempty:
373 raise GitException, 'No changes to commit'
375 # get the commit message
376 if message[-1:] != '\n':
380 # write the index to repository
382 tree_id = _output_one_line('git-write-tree')
389 cmd += 'GIT_AUTHOR_NAME="%s" ' % author_name
391 cmd += 'GIT_AUTHOR_EMAIL="%s" ' % author_email
393 cmd += 'GIT_AUTHOR_DATE="%s" ' % author_date
395 cmd += 'GIT_COMMITTER_NAME="%s" ' % committer_name
397 cmd += 'GIT_COMMITTER_EMAIL="%s" ' % committer_email
398 cmd += 'git-commit-tree %s' % tree_id
404 commit_id = _output_one_line(cmd, message)
406 __set_head(commit_id)
410 def apply_diff(rev1, rev2):
411 """Apply the diff between rev1 and rev2 onto the current
412 index. This function doesn't need to raise an exception since it
413 is only used for fast-pushing a patch. If this operation fails,
414 the pushing would fall back to the three-way merge.
416 return os.system('git-diff-tree -p %s %s | git-apply --index 2> /dev/null'
419 def merge(base, head1, head2):
420 """Perform a 3-way merge between base, head1 and head2 into the
423 if __run('git-read-tree -u -m', [base, head1, head2]) != 0:
424 raise GitException, 'git-read-tree failed (local changes maybe?)'
426 # this can fail if there are conflicts
427 if os.system('git-merge-index -o -q gitmergeonefile.py -a') != 0:
428 raise GitException, 'git-merge-cache failed (possible conflicts)'
430 def status(files = [], modified = False, new = False, deleted = False,
431 conflict = False, unknown = False, noexclude = False):
432 """Show the tree status
434 cache_files = __tree_status(files, unknown = True, noexclude = noexclude)
435 all = not (modified or new or deleted or conflict or unknown)
450 cache_files = [x for x in cache_files if x[0] in filestat]
452 for fs in cache_files:
454 print '%s %s' % (fs[0], fs[1])
458 def diff(files = [], rev1 = 'HEAD', rev2 = None, out_fd = None):
459 """Show the diff between rev1 and rev2
463 diff_str = _output(['git-diff-tree', '-p', rev1, rev2] + files)
465 os.system('git-update-index --refresh > /dev/null')
466 diff_str = _output(['git-diff-index', '-p', rev1] + files)
469 out_fd.write(diff_str)
473 def diffstat(files = [], rev1 = 'HEAD', rev2 = None):
474 """Return the diffstat between rev1 and rev2
477 p=popen2.Popen3('git-apply --stat')
478 diff(files, rev1, rev2, p.tochild)
480 str = p.fromchild.read().rstrip()
482 raise GitException, 'git.diffstat failed'
485 def files(rev1, rev2):
486 """Return the files modified between rev1 and rev2
490 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
491 str += '%s %s\n' % tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
495 def barefiles(rev1, rev2):
496 """Return the files modified between rev1 and rev2, without status info
500 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
501 str += '%s\n' % line.rstrip().split(' ',4)[-1].split('\t',1)[-1]
505 def checkout(files = [], tree_id = None, force = False):
506 """Check out the given or all files
508 if tree_id and __run('git-read-tree -m', [tree_id]) != 0:
509 raise GitException, 'Failed git-read-tree -m %s' % tree_id
511 checkout_cmd = 'git-checkout-index -q -u'
513 checkout_cmd += ' -f'
515 checkout_cmd += ' -a'
517 checkout_cmd += ' --'
519 if __run(checkout_cmd, files) != 0:
520 raise GitException, 'Failed git-checkout-index'
523 """Switch the tree to the given id
525 if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
526 raise GitException, 'git-read-tree failed (local changes maybe?)'
530 def reset(tree_id = None):
531 """Revert the tree changes relative to the given tree_id. It removes
537 cache_files = __tree_status(tree_id = tree_id)
538 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
540 checkout(tree_id = tree_id, force = True)
543 # checkout doesn't remove files
544 map(os.remove, rm_files)
546 def pull(repository = 'origin', refspec = None):
547 """Pull changes from the remote repository. At the moment, just
548 use the 'git pull' command
550 # 'git pull' updates the HEAD
557 if __run('git pull', args) != 0:
558 raise GitException, 'Failed "git pull %s"' % repository
560 def apply_patch(filename = None, base = None):
561 """Apply a patch onto the current or given index. There must not
562 be any local changes in the tree, otherwise the command fails
566 return __run('git-apply --index', [filename]) == 0
569 _input('git-apply --index', sys.stdin)
574 os.system('git-update-index --refresh > /dev/null')
577 orig_head = get_head()
580 if not __apply_patch():
583 raise GitException, 'Patch does not apply cleanly'
585 top = commit(message = 'temporary commit used for applying a patch',
588 merge(base, orig_head, top)
590 def clone(repository, local_dir):
591 """Clone a remote repository. At the moment, just use the
594 if __run('git clone', [repository, local_dir]) != 0:
595 raise GitException, 'Failed "git clone %s %s"' \
596 % (repository, local_dir)