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
95 if id_hash in __commits:
96 return __commits[id_hash]
98 commit = Commit(id_hash)
99 __commits[id_hash] = commit
103 """Return the list of file conflicts
105 conflicts_file = os.path.join(base_dir, 'conflicts')
106 if os.path.isfile(conflicts_file):
107 f = file(conflicts_file)
108 names = [line.strip() for line in f.readlines()]
114 def _input(cmd, file_desc):
115 p = popen2.Popen3(cmd)
117 line = file_desc.readline()
120 p.tochild.write(line)
123 raise GitException, '%s failed' % str(cmd)
127 string = p.fromchild.read()
129 raise GitException, '%s failed' % str(cmd)
132 def _output_one_line(cmd, file_desc = None):
134 if file_desc != None:
135 for line in file_desc:
136 p.tochild.write(line)
138 string = p.fromchild.readline().strip()
140 raise GitException, '%s failed' % str(cmd)
143 def _output_lines(cmd):
145 lines = p.fromchild.readlines()
147 raise GitException, '%s failed' % str(cmd)
150 def __run(cmd, args=None):
151 """__run: runs cmd using spawnvp.
153 Runs cmd using spawnvp. The shell is avoided so it won't mess up
154 our arguments. If args is very large, the command is run multiple
155 times; args is split xargs style: cmd is passed on each
156 invocation. Unlike xargs, returns immediately if any non-zero
157 return code is received.
163 for i in range(0, len(args)+1, 100):
164 r=os.spawnvp(os.P_WAIT, args_l[0], args_l + args[i:min(i+100, len(args))])
169 def __check_base_dir():
170 return os.path.isdir(base_dir)
172 def __tree_status(files = [], tree_id = 'HEAD', unknown = False,
174 """Returns a list of pairs - [status, filename]
176 os.system('git-update-index --refresh > /dev/null')
182 exclude_file = os.path.join(base_dir, 'info', 'exclude')
183 base_exclude = ['--exclude=%s' % s for s in
184 ['*.[ao]', '*.pyc', '.*', '*~', '#*', 'TAGS', 'tags']]
185 base_exclude.append('--exclude-per-directory=.gitignore')
187 if os.path.exists(exclude_file):
188 extra_exclude = ['--exclude-from=%s' % exclude_file]
192 extra_exclude = base_exclude = []
194 lines = _output_lines(['git-ls-files', '--others'] + base_exclude
196 cache_files += [('?', line.strip()) for line in lines]
199 conflicts = get_conflicts()
202 cache_files += [('C', filename) for filename in conflicts]
205 for line in _output_lines(['git-diff-index', '-r', tree_id] + files):
206 fs = tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
207 if fs[1] not in conflicts:
208 cache_files.append(fs)
213 """Return true if there are local changes in the tree
215 return len(__tree_status()) != 0
218 """Verifies the HEAD and returns the SHA1 id that represents it
220 return rev_parse('HEAD')
223 """Returns the name of the file pointed to by the HEAD link
225 return os.path.basename(_output_one_line('git-symbolic-ref HEAD'))
228 """Sets the HEAD value
230 if __run('git-update-ref HEAD', [val]) != 0:
231 raise GitException, 'Could not update HEAD to "%s".' % val
233 def rev_parse(git_id):
234 """Parse the string and return a verified SHA1 id
236 return _output_one_line(['git-rev-parse', '--verify', git_id])
239 """Add the files or recursively add the directory contents
241 # generate the file list
244 if not os.path.exists(i):
245 raise GitException, 'Unknown file or directory: %s' % i
248 # recursive search. We only add files
249 for root, dirs, local_files in os.walk(i):
250 for name in [os.path.join(root, f) for f in local_files]:
251 if os.path.isfile(name):
252 files.append(os.path.normpath(name))
253 elif os.path.isfile(i):
254 files.append(os.path.normpath(i))
256 raise GitException, '%s is not a file or directory' % i
259 if __run('git-update-index --add --', files):
260 raise GitException, 'Unable to add file'
262 def rm(files, force = False):
263 """Remove a file from the repository
266 git_opt = '--force-remove'
272 if os.path.exists(f):
273 raise GitException, '%s exists. Remove it first' %f
275 __run('git-update-index --remove --', files)
278 __run('git-update-index --force-remove --', files)
280 def update_cache(files = [], force = False):
281 """Update the cache information for the given files
283 cache_files = __tree_status(files)
285 # everything is up-to-date
286 if len(cache_files) == 0:
289 # check for unresolved conflicts
290 if not force and [x for x in cache_files
291 if x[0] not in ['M', 'N', 'A', 'D']]:
292 raise GitException, 'Updating cache failed: unresolved conflicts'
295 add_files = [x[1] for x in cache_files if x[0] in ['N', 'A']]
296 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
297 m_files = [x[1] for x in cache_files if x[0] in ['M']]
299 if add_files and __run('git-update-index --add --', add_files) != 0:
300 raise GitException, 'Failed git-update-index --add'
301 if rm_files and __run('git-update-index --force-remove --', rm_files) != 0:
302 raise GitException, 'Failed git-update-index --rm'
303 if m_files and __run('git-update-index --', m_files) != 0:
304 raise GitException, 'Failed git-update-index'
308 def commit(message, files = [], parents = [], allowempty = False,
309 cache_update = True, tree_id = None,
310 author_name = None, author_email = None, author_date = None,
311 committer_name = None, committer_email = None):
312 """Commit the current tree to repository
314 # Get the tree status
315 if cache_update and parents != []:
316 changes = update_cache(files)
317 if not changes and not allowempty:
318 raise GitException, 'No changes to commit'
320 # get the commit message
321 if message[-1:] != '\n':
325 # write the index to repository
327 tree_id = _output_one_line('git-write-tree')
334 cmd += 'GIT_AUTHOR_NAME="%s" ' % author_name
336 cmd += 'GIT_AUTHOR_EMAIL="%s" ' % author_email
338 cmd += 'GIT_AUTHOR_DATE="%s" ' % author_date
340 cmd += 'GIT_COMMITTER_NAME="%s" ' % committer_name
342 cmd += 'GIT_COMMITTER_EMAIL="%s" ' % committer_email
343 cmd += 'git-commit-tree %s' % tree_id
349 commit_id = _output_one_line(cmd, message)
351 __set_head(commit_id)
355 def apply_diff(rev1, rev2):
356 """Apply the diff between rev1 and rev2 onto the current
357 index. This function doesn't need to raise an exception since it
358 is only used for fast-pushing a patch. If this operation fails,
359 the pushing would fall back to the three-way merge.
361 return os.system('git-diff-tree -p %s %s | git-apply --index 2> /dev/null'
364 def merge(base, head1, head2):
365 """Perform a 3-way merge between base, head1 and head2 into the
368 if __run('git-read-tree -u -m', [base, head1, head2]) != 0:
369 raise GitException, 'git-read-tree failed (local changes maybe?)'
371 # this can fail if there are conflicts
372 if os.system('git-merge-index -o -q gitmergeonefile.py -a') != 0:
373 raise GitException, 'git-merge-cache failed (possible conflicts)'
375 def status(files = [], modified = False, new = False, deleted = False,
376 conflict = False, unknown = False, noexclude = False):
377 """Show the tree status
379 cache_files = __tree_status(files, unknown = True, noexclude = noexclude)
380 all = not (modified or new or deleted or conflict or unknown)
395 cache_files = [x for x in cache_files if x[0] in filestat]
397 for fs in cache_files:
399 print '%s %s' % (fs[0], fs[1])
403 def diff(files = [], rev1 = 'HEAD', rev2 = None, out_fd = None):
404 """Show the diff between rev1 and rev2
408 diff_str = _output(['git-diff-tree', '-p', rev1, rev2] + files)
410 os.system('git-update-index --refresh > /dev/null')
411 diff_str = _output(['git-diff-index', '-p', rev1] + files)
414 out_fd.write(diff_str)
418 def diffstat(files = [], rev1 = 'HEAD', rev2 = None):
419 """Return the diffstat between rev1 and rev2
422 p=popen2.Popen3('git-apply --stat')
423 diff(files, rev1, rev2, p.tochild)
425 str = p.fromchild.read().rstrip()
427 raise GitException, 'git.diffstat failed'
430 def files(rev1, rev2):
431 """Return the files modified between rev1 and rev2
435 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
436 str += '%s %s\n' % tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
440 def barefiles(rev1, rev2):
441 """Return the files modified between rev1 and rev2, without status info
445 for line in _output_lines('git-diff-tree -r %s %s' % (rev1, rev2)):
446 str += '%s\n' % line.rstrip().split(' ',4)[-1].split('\t',1)[-1]
450 def checkout(files = [], tree_id = None, force = False):
451 """Check out the given or all files
453 if tree_id and __run('git-read-tree -m', [tree_id]) != 0:
454 raise GitException, 'Failed git-read-tree -m %s' % tree_id
456 checkout_cmd = 'git-checkout-index -q -u'
458 checkout_cmd += ' -f'
460 checkout_cmd += ' -a'
462 checkout_cmd += ' --'
464 if __run(checkout_cmd, files) != 0:
465 raise GitException, 'Failed git-checkout-index'
468 """Switch the tree to the given id
470 if __run('git-read-tree -u -m', [get_head(), tree_id]) != 0:
471 raise GitException, 'git-read-tree failed (local changes maybe?)'
475 def reset(tree_id = None):
476 """Revert the tree changes relative to the given tree_id. It removes
482 cache_files = __tree_status(tree_id = tree_id)
483 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
485 checkout(tree_id = tree_id, force = True)
488 # checkout doesn't remove files
489 map(os.remove, rm_files)
491 def pull(repository = 'origin', refspec = None):
492 """Pull changes from the remote repository. At the moment, just
493 use the 'git pull' command
499 if __run('git pull', args) != 0:
500 raise GitException, 'Failed "git pull %s"' % repository
502 def apply_patch(filename = None):
503 """Apply a patch onto the current index. There must not be any
504 local changes in the tree, otherwise the command fails
506 os.system('git-update-index --refresh > /dev/null')
509 if __run('git-apply --index', [filename]) != 0:
510 raise GitException, 'Patch does not apply cleanly'
512 _input('git-apply --index', sys.stdin)
514 def clone(repository, local_dir):
515 """Clone a remote repository. At the moment, just use the
518 if __run('git clone', [repository, local_dir]) != 0:
519 raise GitException, 'Failed "git clone %s %s"' \
520 % (repository, local_dir)