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
299 new_head = os.path.join('refs', 'heads', name)
300 if not branch_exists(new_head):
301 raise GitException, 'Branch "%s" does not exist' % name
303 tree_id = rev_parse(new_head + '^0')
304 if tree_id != get_head():
305 if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
306 raise GitException, 'git-read-tree failed (local changes maybe?)'
308 set_head_file(new_head)
310 if os.path.isfile(os.path.join(base_dir, 'MERGE_HEAD')):
311 os.remove(os.path.join(base_dir, 'MERGE_HEAD'))
313 def delete_branch(name):
314 """Delete a git branch
316 branch_head = os.path.join('refs', 'heads', name)
317 if not branch_exists(branch_head):
318 raise GitException, 'Branch "%s" does not exist' % name
319 os.remove(os.path.join(base_dir, branch_head))
321 def rename_branch(from_name, to_name):
322 """Rename a git branch
324 from_head = os.path.join('refs', 'heads', from_name)
325 if not branch_exists(from_head):
326 raise GitException, 'Branch "%s" does not exist' % from_name
327 to_head = os.path.join('refs', 'heads', to_name)
328 if branch_exists(to_head):
329 raise GitException, 'Branch "%s" already exists' % to_name
331 if get_head_file() == from_name:
332 set_head_file(to_head)
333 os.rename(os.path.join(base_dir, from_head), os.path.join(base_dir, to_head))
336 """Add the files or recursively add the directory contents
338 # generate the file list
341 if not os.path.exists(i):
342 raise GitException, 'Unknown file or directory: %s' % i
345 # recursive search. We only add files
346 for root, dirs, local_files in os.walk(i):
347 for name in [os.path.join(root, f) for f in local_files]:
348 if os.path.isfile(name):
349 files.append(os.path.normpath(name))
350 elif os.path.isfile(i):
351 files.append(os.path.normpath(i))
353 raise GitException, '%s is not a file or directory' % i
356 if __run('git-update-index --add --', files):
357 raise GitException, 'Unable to add file'
359 def rm(files, force = False):
360 """Remove a file from the repository
363 git_opt = '--force-remove'
369 if os.path.exists(f):
370 raise GitException, '%s exists. Remove it first' %f
372 __run('git-update-index --remove --', files)
375 __run('git-update-index --force-remove --', files)
377 def update_cache(files = [], force = False):
378 """Update the cache information for the given files
380 cache_files = __tree_status(files)
382 # everything is up-to-date
383 if len(cache_files) == 0:
386 # check for unresolved conflicts
387 if not force and [x for x in cache_files
388 if x[0] not in ['M', 'N', 'A', 'D']]:
389 raise GitException, 'Updating cache failed: unresolved conflicts'
392 add_files = [x[1] for x in cache_files if x[0] in ['N', 'A']]
393 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
394 m_files = [x[1] for x in cache_files if x[0] in ['M']]
396 if add_files and __run('git-update-index --add --', add_files) != 0:
397 raise GitException, 'Failed git-update-index --add'
398 if rm_files and __run('git-update-index --force-remove --', rm_files) != 0:
399 raise GitException, 'Failed git-update-index --rm'
400 if m_files and __run('git-update-index --', m_files) != 0:
401 raise GitException, 'Failed git-update-index'
405 def commit(message, files = [], parents = [], allowempty = False,
406 cache_update = True, tree_id = None,
407 author_name = None, author_email = None, author_date = None,
408 committer_name = None, committer_email = None):
409 """Commit the current tree to repository
411 # Get the tree status
412 if cache_update and parents != []:
413 changes = update_cache(files)
414 if not changes and not allowempty:
415 raise GitException, 'No changes to commit'
417 # get the commit message
418 if message[-1:] != '\n':
422 # write the index to repository
424 tree_id = _output_one_line('git-write-tree')
431 cmd += 'GIT_AUTHOR_NAME="%s" ' % author_name
433 cmd += 'GIT_AUTHOR_EMAIL="%s" ' % author_email
435 cmd += 'GIT_AUTHOR_DATE="%s" ' % author_date
437 cmd += 'GIT_COMMITTER_NAME="%s" ' % committer_name
439 cmd += 'GIT_COMMITTER_EMAIL="%s" ' % committer_email
440 cmd += 'git-commit-tree %s' % tree_id
446 commit_id = _output_one_line(cmd, message)
448 __set_head(commit_id)
452 def apply_diff(rev1, rev2):
453 """Apply the diff between rev1 and rev2 onto the current
454 index. This function doesn't need to raise an exception since it
455 is only used for fast-pushing a patch. If this operation fails,
456 the pushing would fall back to the three-way merge.
458 return os.system('git-diff-tree -p %s %s | git-apply --index 2> /dev/null'
461 def merge(base, head1, head2):
462 """Perform a 3-way merge between base, head1 and head2 into the
465 if __run('git-read-tree -u -m', [base, head1, head2]) != 0:
466 raise GitException, 'git-read-tree failed (local changes maybe?)'
468 # this can fail if there are conflicts
469 if os.system('git-merge-index -o -q gitmergeonefile.py -a') != 0:
470 raise GitException, 'git-merge-cache failed (possible conflicts)'
472 def status(files = [], modified = False, new = False, deleted = False,
473 conflict = False, unknown = False, noexclude = False):
474 """Show the tree status
476 cache_files = __tree_status(files, unknown = True, noexclude = noexclude)
477 all = not (modified or new or deleted or conflict or unknown)
492 cache_files = [x for x in cache_files if x[0] in filestat]
494 for fs in cache_files:
496 print '%s %s' % (fs[0], fs[1])
500 def diff(files = [], rev1 = 'HEAD', rev2 = None, out_fd = None):
501 """Show the diff between rev1 and rev2
505 diff_str = _output(['git-diff-tree', '-p', rev1, rev2] + files)
507 os.system('git-update-index --refresh > /dev/null')
508 diff_str = _output(['git-diff-index', '-p', rev1] + files)
511 out_fd.write(diff_str)
515 def diffstat(files = [], rev1 = 'HEAD', rev2 = None):
516 """Return the diffstat between rev1 and rev2
519 p=popen2.Popen3('git-apply --stat')
520 diff(files, rev1, rev2, p.tochild)
522 str = p.fromchild.read().rstrip()
524 raise GitException, 'git.diffstat failed'
527 def files(rev1, rev2):
528 """Return the files modified between rev1 and rev2
532 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
533 str += '%s %s\n' % tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
537 def barefiles(rev1, rev2):
538 """Return the files modified between rev1 and rev2, without status info
542 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
543 str += '%s\n' % line.rstrip().split(' ',4)[-1].split('\t',1)[-1]
547 def checkout(files = [], tree_id = None, force = False):
548 """Check out the given or all files
550 if tree_id and __run('git-read-tree -m', [tree_id]) != 0:
551 raise GitException, 'Failed git-read-tree -m %s' % tree_id
553 checkout_cmd = 'git-checkout-index -q -u'
555 checkout_cmd += ' -f'
557 checkout_cmd += ' -a'
559 checkout_cmd += ' --'
561 if __run(checkout_cmd, files) != 0:
562 raise GitException, 'Failed git-checkout-index'
565 """Switch the tree to the given id
567 if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
568 raise GitException, 'git-read-tree failed (local changes maybe?)'
572 def reset(tree_id = None):
573 """Revert the tree changes relative to the given tree_id. It removes
579 cache_files = __tree_status(tree_id = tree_id)
580 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
582 checkout(tree_id = tree_id, force = True)
585 # checkout doesn't remove files
586 map(os.remove, rm_files)
588 def pull(repository = 'origin', refspec = None):
589 """Pull changes from the remote repository. At the moment, just
590 use the 'git pull' command
592 # 'git pull' updates the HEAD
599 if __run('git pull', args) != 0:
600 raise GitException, 'Failed "git pull %s"' % repository
602 def apply_patch(filename = None, base = None):
603 """Apply a patch onto the current or given index. There must not
604 be any local changes in the tree, otherwise the command fails
608 return __run('git-apply --index', [filename]) == 0
611 _input('git-apply --index', sys.stdin)
616 os.system('git-update-index --refresh > /dev/null')
619 orig_head = get_head()
622 if not __apply_patch():
625 raise GitException, 'Patch does not apply cleanly'
627 top = commit(message = 'temporary commit used for applying a patch',
630 merge(base, orig_head, top)
632 def clone(repository, local_dir):
633 """Clone a remote repository. At the moment, just use the
636 if __run('git clone', [repository, local_dir]) != 0:
637 raise GitException, 'Failed "git clone %s %s"' \
638 % (repository, local_dir)