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
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 # head cache flushing is needed since we might have a different value
242 if __run('git-symbolic-ref HEAD', [ref]) != 0:
243 raise GitException, 'Could not set head to "%s"' % ref
246 """Sets the HEAD value
250 if not __head or __head != val:
251 if __run('git-update-ref HEAD', [val]) != 0:
252 raise GitException, 'Could not update HEAD to "%s".' % val
255 def __clear_head_cache():
256 """Sets the __head to None so that a re-read is forced
262 def rev_parse(git_id):
263 """Parse the string and return a verified SHA1 id
266 return _output_one_line(['git-rev-parse', '--verify', git_id])
268 raise GitException, 'Unknown revision: %s' % git_id
270 def branch_exists(branch):
271 """Existance check for the named branch
273 for line in _output_lines(['git-rev-parse', '--symbolic', '--all']):
274 if line.strip() == branch:
278 def create_branch(new_branch, tree_id = None):
279 """Create a new branch in the git repository
281 new_head = os.path.join('refs', 'heads', new_branch)
282 if branch_exists(new_head):
283 raise GitException, 'Branch "%s" already exists' % new_branch
285 current_head = get_head()
286 set_head_file(new_head)
287 __set_head(current_head)
289 # a checkout isn't needed if new branch points to the current head
293 if os.path.isfile(os.path.join(base_dir, 'MERGE_HEAD')):
294 os.remove(os.path.join(base_dir, 'MERGE_HEAD'))
296 def switch_branch(name):
297 """Switch to a git branch
301 new_head = os.path.join('refs', 'heads', name)
302 if not branch_exists(new_head):
303 raise GitException, 'Branch "%s" does not exist' % name
305 tree_id = rev_parse(new_head + '^0')
306 if tree_id != get_head():
307 if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
308 raise GitException, 'git-read-tree failed (local changes maybe?)'
310 set_head_file(new_head)
312 if os.path.isfile(os.path.join(base_dir, 'MERGE_HEAD')):
313 os.remove(os.path.join(base_dir, 'MERGE_HEAD'))
315 def delete_branch(name):
316 """Delete a git branch
318 branch_head = os.path.join('refs', 'heads', name)
319 if not branch_exists(branch_head):
320 raise GitException, 'Branch "%s" does not exist' % name
321 os.remove(os.path.join(base_dir, branch_head))
323 def rename_branch(from_name, to_name):
324 """Rename a git branch
326 from_head = os.path.join('refs', 'heads', from_name)
327 if not branch_exists(from_head):
328 raise GitException, 'Branch "%s" does not exist' % from_name
329 to_head = os.path.join('refs', 'heads', to_name)
330 if branch_exists(to_head):
331 raise GitException, 'Branch "%s" already exists' % to_name
333 if get_head_file() == from_name:
334 set_head_file(to_head)
335 os.rename(os.path.join(base_dir, from_head), os.path.join(base_dir, to_head))
338 """Add the files or recursively add the directory contents
340 # generate the file list
343 if not os.path.exists(i):
344 raise GitException, 'Unknown file or directory: %s' % i
347 # recursive search. We only add files
348 for root, dirs, local_files in os.walk(i):
349 for name in [os.path.join(root, f) for f in local_files]:
350 if os.path.isfile(name):
351 files.append(os.path.normpath(name))
352 elif os.path.isfile(i):
353 files.append(os.path.normpath(i))
355 raise GitException, '%s is not a file or directory' % i
358 if __run('git-update-index --add --', files):
359 raise GitException, 'Unable to add file'
361 def rm(files, force = False):
362 """Remove a file from the repository
366 if os.path.exists(f):
367 raise GitException, '%s exists. Remove it first' %f
369 __run('git-update-index --remove --', files)
372 __run('git-update-index --force-remove --', files)
374 def update_cache(files = [], force = False):
375 """Update the cache information for the given files
377 cache_files = __tree_status(files)
379 # everything is up-to-date
380 if len(cache_files) == 0:
383 # check for unresolved conflicts
384 if not force and [x for x in cache_files
385 if x[0] not in ['M', 'N', 'A', 'D']]:
386 raise GitException, 'Updating cache failed: unresolved conflicts'
389 add_files = [x[1] for x in cache_files if x[0] in ['N', 'A']]
390 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
391 m_files = [x[1] for x in cache_files if x[0] in ['M']]
393 if add_files and __run('git-update-index --add --', add_files) != 0:
394 raise GitException, 'Failed git-update-index --add'
395 if rm_files and __run('git-update-index --force-remove --', rm_files) != 0:
396 raise GitException, 'Failed git-update-index --rm'
397 if m_files and __run('git-update-index --', m_files) != 0:
398 raise GitException, 'Failed git-update-index'
402 def commit(message, files = [], parents = [], allowempty = False,
403 cache_update = True, tree_id = None,
404 author_name = None, author_email = None, author_date = None,
405 committer_name = None, committer_email = None):
406 """Commit the current tree to repository
408 # Get the tree status
409 if cache_update and parents != []:
410 changes = update_cache(files)
411 if not changes and not allowempty:
412 raise GitException, 'No changes to commit'
414 # get the commit message
415 if message[-1:] != '\n':
419 # write the index to repository
421 tree_id = _output_one_line('git-write-tree')
428 cmd += 'GIT_AUTHOR_NAME="%s" ' % author_name
430 cmd += 'GIT_AUTHOR_EMAIL="%s" ' % author_email
432 cmd += 'GIT_AUTHOR_DATE="%s" ' % author_date
434 cmd += 'GIT_COMMITTER_NAME="%s" ' % committer_name
436 cmd += 'GIT_COMMITTER_EMAIL="%s" ' % committer_email
437 cmd += 'git-commit-tree %s' % tree_id
443 commit_id = _output_one_line(cmd, message)
445 __set_head(commit_id)
449 def apply_diff(rev1, rev2):
450 """Apply the diff between rev1 and rev2 onto the current
451 index. This function doesn't need to raise an exception since it
452 is only used for fast-pushing a patch. If this operation fails,
453 the pushing would fall back to the three-way merge.
455 return os.system('git-diff-tree -p %s %s | git-apply --index 2> /dev/null'
458 def merge(base, head1, head2):
459 """Perform a 3-way merge between base, head1 and head2 into the
462 if __run('git-read-tree -u -m', [base, head1, head2]) != 0:
463 raise GitException, 'git-read-tree failed (local changes maybe?)'
465 # this can fail if there are conflicts
466 if os.system('git-merge-index -o -q gitmergeonefile.py -a') != 0:
467 raise GitException, 'git-merge-cache failed (possible conflicts)'
469 def status(files = [], modified = False, new = False, deleted = False,
470 conflict = False, unknown = False, noexclude = False):
471 """Show the tree status
473 cache_files = __tree_status(files, unknown = True, noexclude = noexclude)
474 all = not (modified or new or deleted or conflict or unknown)
489 cache_files = [x for x in cache_files if x[0] in filestat]
491 for fs in cache_files:
493 print '%s %s' % (fs[0], fs[1])
497 def diff(files = [], rev1 = 'HEAD', rev2 = None, out_fd = None):
498 """Show the diff between rev1 and rev2
502 diff_str = _output(['git-diff-tree', '-p', rev1, rev2] + files)
504 os.system('git-update-index --refresh > /dev/null')
505 diff_str = _output(['git-diff-index', '-p', rev1] + files)
508 out_fd.write(diff_str)
512 def diffstat(files = [], rev1 = 'HEAD', rev2 = None):
513 """Return the diffstat between rev1 and rev2
516 p=popen2.Popen3('git-apply --stat')
517 diff(files, rev1, rev2, p.tochild)
519 str = p.fromchild.read().rstrip()
521 raise GitException, 'git.diffstat failed'
524 def files(rev1, rev2):
525 """Return the files modified between rev1 and rev2
529 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
530 str += '%s %s\n' % tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
534 def barefiles(rev1, rev2):
535 """Return the files modified between rev1 and rev2, without status info
539 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
540 str += '%s\n' % line.rstrip().split(' ',4)[-1].split('\t',1)[-1]
544 def checkout(files = [], tree_id = None, force = False):
545 """Check out the given or all files
547 if tree_id and __run('git-read-tree -m', [tree_id]) != 0:
548 raise GitException, 'Failed git-read-tree -m %s' % tree_id
550 checkout_cmd = 'git-checkout-index -q -u'
552 checkout_cmd += ' -f'
554 checkout_cmd += ' -a'
556 checkout_cmd += ' --'
558 if __run(checkout_cmd, files) != 0:
559 raise GitException, 'Failed git-checkout-index'
562 """Switch the tree to the given id
564 if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
565 raise GitException, 'git-read-tree failed (local changes maybe?)'
569 def reset(tree_id = None):
570 """Revert the tree changes relative to the given tree_id. It removes
576 cache_files = __tree_status(tree_id = tree_id)
577 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
579 checkout(tree_id = tree_id, force = True)
582 # checkout doesn't remove files
583 map(os.remove, rm_files)
585 def pull(repository = 'origin', refspec = None):
586 """Pull changes from the remote repository. At the moment, just
587 use the 'git pull' command
589 # 'git pull' updates the HEAD
596 if __run('git pull', args) != 0:
597 raise GitException, 'Failed "git pull %s"' % repository
599 def apply_patch(filename = None, base = None):
600 """Apply a patch onto the current or given index. There must not
601 be any local changes in the tree, otherwise the command fails
605 return __run('git-apply --index', [filename]) == 0
608 _input('git-apply --index', sys.stdin)
613 os.system('git-update-index --refresh > /dev/null')
616 orig_head = get_head()
619 if not __apply_patch():
622 raise GitException, 'Patch does not apply cleanly'
624 top = commit(message = 'temporary commit used for applying a patch',
627 merge(base, orig_head, top)
629 def clone(repository, local_dir):
630 """Clone a remote repository. At the moment, just use the
633 if __run('git clone', [repository, local_dir]) != 0:
634 raise GitException, 'Failed "git clone %s %s"' \
635 % (repository, local_dir)