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'))
237 """Sets the HEAD value
242 if __run('git-update-ref HEAD', [val]) != 0:
243 raise GitException, 'Could not update HEAD to "%s".' % val
245 def rev_parse(git_id):
246 """Parse the string and return a verified SHA1 id
249 return _output_one_line(['git-rev-parse', '--verify', git_id])
251 raise GitException, 'Unknown revision: %s' % git_id
254 """Add the files or recursively add the directory contents
256 # generate the file list
259 if not os.path.exists(i):
260 raise GitException, 'Unknown file or directory: %s' % i
263 # recursive search. We only add files
264 for root, dirs, local_files in os.walk(i):
265 for name in [os.path.join(root, f) for f in local_files]:
266 if os.path.isfile(name):
267 files.append(os.path.normpath(name))
268 elif os.path.isfile(i):
269 files.append(os.path.normpath(i))
271 raise GitException, '%s is not a file or directory' % i
274 if __run('git-update-index --add --', files):
275 raise GitException, 'Unable to add file'
277 def rm(files, force = False):
278 """Remove a file from the repository
281 git_opt = '--force-remove'
287 if os.path.exists(f):
288 raise GitException, '%s exists. Remove it first' %f
290 __run('git-update-index --remove --', files)
293 __run('git-update-index --force-remove --', files)
295 def update_cache(files = [], force = False):
296 """Update the cache information for the given files
298 cache_files = __tree_status(files)
300 # everything is up-to-date
301 if len(cache_files) == 0:
304 # check for unresolved conflicts
305 if not force and [x for x in cache_files
306 if x[0] not in ['M', 'N', 'A', 'D']]:
307 raise GitException, 'Updating cache failed: unresolved conflicts'
310 add_files = [x[1] for x in cache_files if x[0] in ['N', 'A']]
311 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
312 m_files = [x[1] for x in cache_files if x[0] in ['M']]
314 if add_files and __run('git-update-index --add --', add_files) != 0:
315 raise GitException, 'Failed git-update-index --add'
316 if rm_files and __run('git-update-index --force-remove --', rm_files) != 0:
317 raise GitException, 'Failed git-update-index --rm'
318 if m_files and __run('git-update-index --', m_files) != 0:
319 raise GitException, 'Failed git-update-index'
323 def commit(message, files = [], parents = [], allowempty = False,
324 cache_update = True, tree_id = None,
325 author_name = None, author_email = None, author_date = None,
326 committer_name = None, committer_email = None):
327 """Commit the current tree to repository
329 # Get the tree status
330 if cache_update and parents != []:
331 changes = update_cache(files)
332 if not changes and not allowempty:
333 raise GitException, 'No changes to commit'
335 # get the commit message
336 if message[-1:] != '\n':
340 # write the index to repository
342 tree_id = _output_one_line('git-write-tree')
349 cmd += 'GIT_AUTHOR_NAME="%s" ' % author_name
351 cmd += 'GIT_AUTHOR_EMAIL="%s" ' % author_email
353 cmd += 'GIT_AUTHOR_DATE="%s" ' % author_date
355 cmd += 'GIT_COMMITTER_NAME="%s" ' % committer_name
357 cmd += 'GIT_COMMITTER_EMAIL="%s" ' % committer_email
358 cmd += 'git-commit-tree %s' % tree_id
364 commit_id = _output_one_line(cmd, message)
366 __set_head(commit_id)
370 def apply_diff(rev1, rev2):
371 """Apply the diff between rev1 and rev2 onto the current
372 index. This function doesn't need to raise an exception since it
373 is only used for fast-pushing a patch. If this operation fails,
374 the pushing would fall back to the three-way merge.
376 return os.system('git-diff-tree -p %s %s | git-apply --index 2> /dev/null'
379 def merge(base, head1, head2):
380 """Perform a 3-way merge between base, head1 and head2 into the
383 if __run('git-read-tree -u -m', [base, head1, head2]) != 0:
384 raise GitException, 'git-read-tree failed (local changes maybe?)'
386 # this can fail if there are conflicts
387 if os.system('git-merge-index -o -q gitmergeonefile.py -a') != 0:
388 raise GitException, 'git-merge-cache failed (possible conflicts)'
390 def status(files = [], modified = False, new = False, deleted = False,
391 conflict = False, unknown = False, noexclude = False):
392 """Show the tree status
394 cache_files = __tree_status(files, unknown = True, noexclude = noexclude)
395 all = not (modified or new or deleted or conflict or unknown)
410 cache_files = [x for x in cache_files if x[0] in filestat]
412 for fs in cache_files:
414 print '%s %s' % (fs[0], fs[1])
418 def diff(files = [], rev1 = 'HEAD', rev2 = None, out_fd = None):
419 """Show the diff between rev1 and rev2
423 diff_str = _output(['git-diff-tree', '-p', rev1, rev2] + files)
425 os.system('git-update-index --refresh > /dev/null')
426 diff_str = _output(['git-diff-index', '-p', rev1] + files)
429 out_fd.write(diff_str)
433 def diffstat(files = [], rev1 = 'HEAD', rev2 = None):
434 """Return the diffstat between rev1 and rev2
437 p=popen2.Popen3('git-apply --stat')
438 diff(files, rev1, rev2, p.tochild)
440 str = p.fromchild.read().rstrip()
442 raise GitException, 'git.diffstat failed'
445 def files(rev1, rev2):
446 """Return the files modified between rev1 and rev2
450 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
451 str += '%s %s\n' % tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
455 def barefiles(rev1, rev2):
456 """Return the files modified between rev1 and rev2, without status info
460 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
461 str += '%s\n' % line.rstrip().split(' ',4)[-1].split('\t',1)[-1]
465 def checkout(files = [], tree_id = None, force = False):
466 """Check out the given or all files
468 if tree_id and __run('git-read-tree -m', [tree_id]) != 0:
469 raise GitException, 'Failed git-read-tree -m %s' % tree_id
471 checkout_cmd = 'git-checkout-index -q -u'
473 checkout_cmd += ' -f'
475 checkout_cmd += ' -a'
477 checkout_cmd += ' --'
479 if __run(checkout_cmd, files) != 0:
480 raise GitException, 'Failed git-checkout-index'
483 """Switch the tree to the given id
485 if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
486 raise GitException, 'git-read-tree failed (local changes maybe?)'
490 def reset(tree_id = None):
491 """Revert the tree changes relative to the given tree_id. It removes
497 cache_files = __tree_status(tree_id = tree_id)
498 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
500 checkout(tree_id = tree_id, force = True)
503 # checkout doesn't remove files
504 map(os.remove, rm_files)
506 def pull(repository = 'origin', refspec = None):
507 """Pull changes from the remote repository. At the moment, just
508 use the 'git pull' command
514 if __run('git pull', args) != 0:
515 raise GitException, 'Failed "git pull %s"' % repository
517 def apply_patch(filename = None, base = None):
518 """Apply a patch onto the current or given index. There must not
519 be any local changes in the tree, otherwise the command fails
523 return __run('git-apply --index', [filename]) == 0
526 _input('git-apply --index', sys.stdin)
531 os.system('git-update-index --refresh > /dev/null')
534 orig_head = get_head()
537 if not __apply_patch():
540 raise GitException, 'Patch does not apply cleanly'
542 top = commit(message = 'temporary commit used for applying a patch',
545 merge(base, orig_head, top)
547 def clone(repository, local_dir):
548 """Clone a remote repository. At the moment, just use the
551 if __run('git clone', [repository, local_dir]) != 0:
552 raise GitException, 'Failed "git clone %s %s"' \
553 % (repository, local_dir)