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, popen2, re, gitmergeonefile
23 from stgit import basedir
24 from stgit.utils import *
27 class GitException(Exception):
36 """Handle the commit objects
38 def __init__(self, id_hash):
39 self.__id_hash = id_hash
41 lines = _output_lines('git-cat-file commit %s' % id_hash)
43 for i in range(len(lines)):
47 field = line.strip().split(' ', 1)
48 if field[0] == 'tree':
49 self.__tree = field[1]
50 elif field[0] == 'parent':
51 self.__parents.append(field[1])
52 if field[0] == 'author':
53 self.__author = field[1]
54 if field[0] == 'committer':
55 self.__committer = field[1]
56 self.__log = ''.join(lines[i+1:])
58 def get_id_hash(self):
65 return self.__parents[0]
67 def get_parents(self):
73 def get_committer(self):
74 return self.__committer
79 # dictionary of Commit objects, used to avoid multiple calls to git
86 def get_commit(id_hash):
87 """Commit objects factory. Save/look-up them in the __commits
92 if id_hash in __commits:
93 return __commits[id_hash]
95 commit = Commit(id_hash)
96 __commits[id_hash] = commit
100 """Return the list of file conflicts
102 conflicts_file = os.path.join(basedir.get(), 'conflicts')
103 if os.path.isfile(conflicts_file):
104 f = file(conflicts_file)
105 names = [line.strip() for line in f.readlines()]
111 def _input(cmd, file_desc):
112 p = popen2.Popen3(cmd, True)
114 line = file_desc.readline()
117 p.tochild.write(line)
120 raise GitException, '%s failed' % str(cmd)
123 p=popen2.Popen3(cmd, True)
124 output = p.fromchild.read()
126 raise GitException, '%s failed' % str(cmd)
129 def _output_one_line(cmd, file_desc = None):
130 p=popen2.Popen3(cmd, True)
131 if file_desc != None:
132 for line in file_desc:
133 p.tochild.write(line)
135 output = p.fromchild.readline().strip()
137 raise GitException, '%s failed' % str(cmd)
140 def _output_lines(cmd):
141 p=popen2.Popen3(cmd, True)
142 lines = p.fromchild.readlines()
144 raise GitException, '%s failed' % str(cmd)
147 def __run(cmd, args=None):
148 """__run: runs cmd using spawnvp.
150 Runs cmd using spawnvp. The shell is avoided so it won't mess up
151 our arguments. If args is very large, the command is run multiple
152 times; args is split xargs style: cmd is passed on each
153 invocation. Unlike xargs, returns immediately if any non-zero
154 return code is received.
160 for i in range(0, len(args)+1, 100):
161 r=os.spawnvp(os.P_WAIT, args_l[0], args_l + args[i:min(i+100, len(args))])
166 def __tree_status(files = None, tree_id = 'HEAD', unknown = False,
168 """Returns a list of pairs - [status, filename]
178 exclude_file = os.path.join(basedir.get(), 'info', 'exclude')
179 base_exclude = ['--exclude=%s' % s for s in
180 ['*.[ao]', '*.pyc', '.*', '*~', '#*', 'TAGS', 'tags']]
181 base_exclude.append('--exclude-per-directory=.gitignore')
183 if os.path.exists(exclude_file):
184 extra_exclude = ['--exclude-from=%s' % exclude_file]
188 extra_exclude = base_exclude = []
190 lines = _output_lines(['git-ls-files', '--others', '--directory']
191 + base_exclude + extra_exclude)
192 cache_files += [('?', line.strip()) for line in lines]
195 conflicts = get_conflicts()
198 cache_files += [('C', filename) for filename in conflicts]
201 for line in _output_lines(['git-diff-index', tree_id] + files):
202 fs = tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
203 if fs[1] not in conflicts:
204 cache_files.append(fs)
209 """Return true if there are local changes in the tree
211 return len(__tree_status()) != 0
217 """Verifies the HEAD and returns the SHA1 id that represents it
222 __head = rev_parse('HEAD')
226 """Returns the name of the file pointed to by the HEAD link
228 return os.path.basename(_output_one_line('git-symbolic-ref HEAD'))
230 def set_head_file(ref):
231 """Resets HEAD to point to a new ref
233 # head cache flushing is needed since we might have a different value
236 if __run('git-symbolic-ref HEAD', [ref]) != 0:
237 raise GitException, 'Could not set head to "%s"' % ref
240 """Sets the HEAD value
244 if not __head or __head != val:
245 if __run('git-update-ref HEAD', [val]) != 0:
246 raise GitException, 'Could not update HEAD to "%s".' % val
249 # only allow SHA1 hashes
250 assert(len(__head) == 40)
252 def __clear_head_cache():
253 """Sets the __head to None so that a re-read is forced
260 """Refresh index with stat() information from the working directory.
262 __run('git-update-index -q --unmerged --refresh')
264 def rev_parse(git_id):
265 """Parse the string and return a verified SHA1 id
268 return _output_one_line(['git-rev-parse', '--verify', git_id])
270 raise GitException, 'Unknown revision: %s' % git_id
272 def branch_exists(branch):
273 """Existence check for the named branch
275 for line in _output_lines(['git-rev-parse', '--symbolic', '--all']):
276 if line.strip() == branch:
280 def create_branch(new_branch, tree_id = None):
281 """Create a new branch in the git repository
283 new_head = os.path.join('refs', 'heads', new_branch)
284 if branch_exists(new_head):
285 raise GitException, 'Branch "%s" already exists' % new_branch
287 current_head = get_head()
288 set_head_file(new_head)
289 __set_head(current_head)
291 # a checkout isn't needed if new branch points to the current head
295 if os.path.isfile(os.path.join(basedir.get(), 'MERGE_HEAD')):
296 os.remove(os.path.join(basedir.get(), 'MERGE_HEAD'))
298 def switch_branch(name):
299 """Switch to a git branch
303 new_head = os.path.join('refs', 'heads', name)
304 if not branch_exists(new_head):
305 raise GitException, 'Branch "%s" does not exist' % name
307 tree_id = rev_parse(new_head + '^{commit}')
308 if tree_id != get_head():
310 if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
311 raise GitException, 'git-read-tree failed (local changes maybe?)'
313 set_head_file(new_head)
315 if os.path.isfile(os.path.join(basedir.get(), 'MERGE_HEAD')):
316 os.remove(os.path.join(basedir.get(), 'MERGE_HEAD'))
318 def delete_branch(name):
319 """Delete a git branch
321 branch_head = os.path.join('refs', 'heads', name)
322 if not branch_exists(branch_head):
323 raise GitException, 'Branch "%s" does not exist' % name
324 os.remove(os.path.join(basedir.get(), branch_head))
326 def rename_branch(from_name, to_name):
327 """Rename a git branch
329 from_head = os.path.join('refs', 'heads', from_name)
330 if not branch_exists(from_head):
331 raise GitException, 'Branch "%s" does not exist' % from_name
332 to_head = os.path.join('refs', 'heads', to_name)
333 if branch_exists(to_head):
334 raise GitException, 'Branch "%s" already exists' % to_name
336 if get_head_file() == from_name:
337 set_head_file(to_head)
338 os.rename(os.path.join(basedir.get(), from_head), \
339 os.path.join(basedir.get(), to_head))
342 """Add the files or recursively add the directory contents
344 # generate the file list
347 if not os.path.exists(i):
348 raise GitException, 'Unknown file or directory: %s' % i
351 # recursive search. We only add files
352 for root, dirs, local_files in os.walk(i):
353 for name in [os.path.join(root, f) for f in local_files]:
354 if os.path.isfile(name):
355 files.append(os.path.normpath(name))
356 elif os.path.isfile(i):
357 files.append(os.path.normpath(i))
359 raise GitException, '%s is not a file or directory' % i
362 if __run('git-update-index --add --', files):
363 raise GitException, 'Unable to add file'
365 def rm(files, force = False):
366 """Remove a file from the repository
370 if os.path.exists(f):
371 raise GitException, '%s exists. Remove it first' %f
373 __run('git-update-index --remove --', files)
376 __run('git-update-index --force-remove --', files)
378 def update_cache(files = None, force = False):
379 """Update the cache information for the given files
384 cache_files = __tree_status(files)
386 # everything is up-to-date
387 if len(cache_files) == 0:
390 # check for unresolved conflicts
391 if not force and [x for x in cache_files
392 if x[0] not in ['M', 'N', 'A', 'D']]:
393 raise GitException, 'Updating cache failed: unresolved conflicts'
396 add_files = [x[1] for x in cache_files if x[0] in ['N', 'A']]
397 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
398 m_files = [x[1] for x in cache_files if x[0] in ['M']]
400 if add_files and __run('git-update-index --add --', add_files) != 0:
401 raise GitException, 'Failed git-update-index --add'
402 if rm_files and __run('git-update-index --force-remove --', rm_files) != 0:
403 raise GitException, 'Failed git-update-index --rm'
404 if m_files and __run('git-update-index --', m_files) != 0:
405 raise GitException, 'Failed git-update-index'
409 def commit(message, files = None, parents = None, allowempty = False,
410 cache_update = True, tree_id = None,
411 author_name = None, author_email = None, author_date = None,
412 committer_name = None, committer_email = None):
413 """Commit the current tree to repository
420 # Get the tree status
421 if cache_update and parents != []:
422 changes = update_cache(files)
423 if not changes and not allowempty:
424 raise GitException, 'No changes to commit'
426 # get the commit message
427 if message[-1:] != '\n':
431 # write the index to repository
433 tree_id = _output_one_line('git-write-tree')
440 cmd += 'GIT_AUTHOR_NAME="%s" ' % author_name
442 cmd += 'GIT_AUTHOR_EMAIL="%s" ' % author_email
444 cmd += 'GIT_AUTHOR_DATE="%s" ' % author_date
446 cmd += 'GIT_COMMITTER_NAME="%s" ' % committer_name
448 cmd += 'GIT_COMMITTER_EMAIL="%s" ' % committer_email
449 cmd += 'git-commit-tree %s' % tree_id
455 commit_id = _output_one_line(cmd, message)
457 __set_head(commit_id)
461 def apply_diff(rev1, rev2, check_index = True):
462 """Apply the diff between rev1 and rev2 onto the current
463 index. This function doesn't need to raise an exception since it
464 is only used for fast-pushing a patch. If this operation fails,
465 the pushing would fall back to the three-way merge.
468 index_opt = '--index'
471 cmd = 'git-diff-tree -p %s %s | git-apply %s 2> /dev/null' \
472 % (rev1, rev2, index_opt)
474 return os.system(cmd) == 0
476 def merge(base, head1, head2):
477 """Perform a 3-way merge between base, head1 and head2 into the
481 if __run('git-read-tree -u -m --aggressive', [base, head1, head2]) != 0:
482 raise GitException, 'git-read-tree failed (local changes maybe?)'
484 # check the index for unmerged entries
486 stages_re = re.compile('^([0-7]+) ([0-9a-f]{40}) ([1-3])\t(.*)$', re.S)
488 for line in _output('git-ls-files --unmerged --stage -z').split('\0'):
492 mode, hash, stage, path = stages_re.findall(line)[0]
494 if not path in files:
496 files[path]['1'] = ('', '')
497 files[path]['2'] = ('', '')
498 files[path]['3'] = ('', '')
500 files[path][stage] = (mode, hash)
502 # merge the unmerged files
506 if gitmergeonefile.merge(stages['1'][1], stages['2'][1],
507 stages['3'][1], path, stages['1'][0],
508 stages['2'][0], stages['3'][0]) != 0:
512 raise GitException, 'GIT index merging failed (possible conflicts)'
514 def status(files = None, modified = False, new = False, deleted = False,
515 conflict = False, unknown = False, noexclude = False):
516 """Show the tree status
521 cache_files = __tree_status(files, unknown = True, noexclude = noexclude)
522 all = not (modified or new or deleted or conflict or unknown)
537 cache_files = [x for x in cache_files if x[0] in filestat]
539 for fs in cache_files:
541 print '%s %s' % (fs[0], fs[1])
545 def diff(files = None, rev1 = 'HEAD', rev2 = None, out_fd = None):
546 """Show the diff between rev1 and rev2
552 diff_str = _output(['git-diff-tree', '-p', rev1, rev2] + files)
556 diff_str = _output(['git-diff-index', '-p', '-R', rev2] + files)
558 diff_str = _output(['git-diff-index', '-p', rev1] + files)
563 out_fd.write(diff_str)
567 def diffstat(files = None, rev1 = 'HEAD', rev2 = None):
568 """Return the diffstat between rev1 and rev2
573 p=popen2.Popen3('git-apply --stat')
574 diff(files, rev1, rev2, p.tochild)
576 diff_str = p.fromchild.read().rstrip()
578 raise GitException, 'git.diffstat failed'
581 def files(rev1, rev2):
582 """Return the files modified between rev1 and rev2
586 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
587 result += '%s %s\n' % tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
589 return result.rstrip()
591 def barefiles(rev1, rev2):
592 """Return the files modified between rev1 and rev2, without status info
596 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
597 result += '%s\n' % line.rstrip().split(' ',4)[-1].split('\t',1)[-1]
599 return result.rstrip()
601 def pretty_commit(commit_id = 'HEAD'):
602 """Return a given commit (log + diff)
604 return _output(['git-diff-tree', '--cc', '--always', '--pretty', '-r',
607 def checkout(files = None, tree_id = None, force = False):
608 """Check out the given or all files
613 if tree_id and __run('git-read-tree -m', [tree_id]) != 0:
614 raise GitException, 'Failed git-read-tree -m %s' % tree_id
616 checkout_cmd = 'git-checkout-index -q -u'
618 checkout_cmd += ' -f'
620 checkout_cmd += ' -a'
622 checkout_cmd += ' --'
624 if __run(checkout_cmd, files) != 0:
625 raise GitException, 'Failed git-checkout-index'
628 """Switch the tree to the given id
631 if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
632 raise GitException, 'git-read-tree failed (local changes maybe?)'
636 def reset(files = None, tree_id = None, check_out = True):
637 """Revert the tree changes relative to the given tree_id. It removes
644 checkout(files, tree_id, True)
646 # if the reset refers to the whole tree, switch the HEAD as well
650 def pull(repository = 'origin', refspec = None):
651 """Pull changes from the remote repository. At the moment, just
652 use the 'git pull' command
654 # 'git pull' updates the HEAD
661 if __run('git pull', args) != 0:
662 raise GitException, 'Failed "git pull %s"' % repository
664 def apply_patch(filename = None, base = None):
665 """Apply a patch onto the current or given index. There must not
666 be any local changes in the tree, otherwise the command fails
670 return __run('git-apply --index', [filename]) == 0
673 _input('git-apply --index', sys.stdin)
679 orig_head = get_head()
682 refresh_index() # needed since __apply_patch() doesn't do it
684 if not __apply_patch():
687 raise GitException, 'Patch does not apply cleanly'
689 top = commit(message = 'temporary commit used for applying a patch',
692 merge(base, orig_head, top)
694 def clone(repository, local_dir):
695 """Clone a remote repository. At the moment, just use the
698 if __run('git clone', [repository, local_dir]) != 0:
699 raise GitException, 'Failed "git clone %s %s"' \
700 % (repository, local_dir)
702 def modifying_revs(files, base_rev):
703 """Return the revisions from the list modifying the given files
705 cmd = ['git-rev-list', '%s..' % base_rev, '--']
706 revs = [line.strip() for line in _output_lines(cmd + files)]