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, re, gitmergeonefile
22 from shutil import copyfile
24 from stgit.exception import *
25 from stgit import basedir
26 from stgit.utils import *
27 from stgit.out import *
28 from stgit.run import *
29 from stgit.config import config
32 class GitException(StgException):
35 # When a subprocess has a problem, we want the exception to be a
36 # subclass of GitException.
37 class GitRunException(GitException):
41 def __init__(self, *cmd):
42 """Initialise the Run object and insert the 'git' command name.
44 Run.__init__(self, 'git', *cmd)
51 """An author, committer, etc."""
52 def __init__(self, name = None, email = None, date = '',
54 self.name = self.email = self.date = None
55 if name or email or date:
61 assert not (name or email or date)
63 m = re.match(r'^(.+)<(.+)>(.*)$', s)
65 return [x.strip() or None for x in m.groups()]
66 self.name, self.email, self.date = parse_desc(desc)
67 def set_name(self, val):
70 def set_email(self, val):
73 def set_date(self, val):
77 if self.name and self.email:
78 return '%s <%s>' % (self.name, self.email)
80 raise GitException, 'not enough identity data'
83 """Handle the commit objects
85 def __init__(self, id_hash):
86 self.__id_hash = id_hash
88 lines = GRun('cat-file', 'commit', id_hash).output_lines()
89 for i in range(len(lines)):
92 break # we've seen all the header fields
93 key, val = line.split(' ', 1)
98 elif key == 'committer':
99 self.__committer = val
101 pass # ignore other headers
102 self.__log = '\n'.join(lines[i+1:])
104 def get_id_hash(self):
105 return self.__id_hash
110 def get_parent(self):
111 parents = self.get_parents()
117 def get_parents(self):
118 return GRun('rev-list', '--parents', '--max-count=1', self.__id_hash
119 ).output_one_line().split()[1:]
121 def get_author(self):
124 def get_committer(self):
125 return self.__committer
131 return self.get_id_hash()
133 # dictionary of Commit objects, used to avoid multiple calls to git
140 def get_commit(id_hash):
141 """Commit objects factory. Save/look-up them in the __commits
146 if id_hash in __commits:
147 return __commits[id_hash]
149 commit = Commit(id_hash)
150 __commits[id_hash] = commit
154 """Return the list of file conflicts
157 for line in GRun('ls-files', '-z', '--unmerged'
158 ).raw_output().split('\0')[:-1]:
159 stat, path = line.split('\t', 1)
160 # Look for entries in stage 2 (could equally well use 3)
161 if stat.endswith(' 2'):
166 files = [os.path.join(basedir.get(), 'info', 'exclude')]
167 user_exclude = config.get('core.excludesfile')
169 files.append(user_exclude)
172 def ls_files(files, tree = None, full_name = True):
173 """Return the files known to GIT or raise an error otherwise. It also
174 converts the file to the full path relative the the .git directory.
181 args.append('--with-tree=%s' % tree)
183 args.append('--full-name')
187 return GRun('ls-files', '--error-unmatch', *args).output_lines()
188 except GitRunException:
189 # just hide the details of the 'git ls-files' command we use
190 raise GitException, \
191 'Some of the given paths are either missing or not known to GIT'
193 def tree_status(files = None, tree_id = 'HEAD', unknown = False,
194 noexclude = True, verbose = False, diff_flags = []):
195 """Get the status of all changed files, or of a selected set of
196 files. Returns a list of pairs - (status, filename).
198 If 'not files', it will check all files, and optionally all
199 unknown files. If 'files' is a list, it will only check the files
202 assert not files or not unknown
205 out.start('Checking for changes in the working directory')
213 cmd = ['ls-files', '-z', '--others', '--directory',
214 '--no-empty-directory']
216 cmd += ['--exclude=%s' % s for s in
217 ['*.[ao]', '*.pyc', '.*', '*~', '#*', 'TAGS', 'tags']]
218 cmd += ['--exclude-per-directory=.gitignore']
219 cmd += ['--exclude-from=%s' % fn
220 for fn in exclude_files()
221 if os.path.exists(fn)]
223 lines = GRun(*cmd).raw_output().split('\0')
224 cache_files += [('?', line) for line in lines if line]
227 conflicts = get_conflicts()
228 cache_files += [('C', filename) for filename in conflicts
229 if not files or filename in files]
230 reported_files = set(conflicts)
233 args = diff_flags + [tree_id]
235 args += ['--'] + files
236 for line in GRun('diff-index', *args).output_lines():
237 fs = tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
238 if fs[1] not in reported_files:
239 cache_files.append(fs)
240 reported_files.add(fs[1])
242 # files in the index but changed on (or removed from) disk
243 args = list(diff_flags)
245 args += ['--'] + files
246 for line in GRun('diff-files', *args).output_lines():
247 fs = tuple(line.rstrip().split(' ',4)[-1].split('\t',1))
248 if fs[1] not in reported_files:
249 cache_files.append(fs)
250 reported_files.add(fs[1])
257 def local_changes(verbose = True):
258 """Return true if there are local changes in the tree
260 return len(tree_status(verbose = verbose)) != 0
264 hr = re.compile(r'^[0-9a-f]{40} refs/heads/(.+)$')
265 for line in GRun('show-ref', '--heads').output_lines():
267 heads.append(m.group(1))
274 """Verifies the HEAD and returns the SHA1 id that represents it
279 __head = rev_parse('HEAD')
282 class DetachedHeadException(GitException):
284 GitException.__init__(self, 'Not on any branch')
287 """Return the name of the file pointed to by the HEAD symref.
288 Throw an exception if HEAD is detached."""
291 'refs/heads/', GRun('symbolic-ref', '-q', 'HEAD'
293 except GitRunException:
294 raise DetachedHeadException()
296 def set_head_file(ref):
297 """Resets HEAD to point to a new ref
299 # head cache flushing is needed since we might have a different value
303 GRun('symbolic-ref', 'HEAD', 'refs/heads/%s' % ref).run()
304 except GitRunException:
305 raise GitException, 'Could not set head to "%s"' % ref
307 def set_ref(ref, val):
308 """Point ref at a new commit object."""
310 GRun('update-ref', ref, val).run()
311 except GitRunException:
312 raise GitException, 'Could not update %s to "%s".' % (ref, val)
314 def set_branch(branch, val):
315 set_ref('refs/heads/%s' % branch, val)
318 """Sets the HEAD value
322 if not __head or __head != val:
326 # only allow SHA1 hashes
327 assert(len(__head) == 40)
329 def __clear_head_cache():
330 """Sets the __head to None so that a re-read is forced
337 """Refresh index with stat() information from the working directory.
339 GRun('update-index', '-q', '--unmerged', '--refresh').run()
341 def rev_parse(git_id):
342 """Parse the string and return a verified SHA1 id
345 return GRun('rev-parse', '--verify', git_id
346 ).discard_stderr().output_one_line()
347 except GitRunException:
348 raise GitException, 'Unknown revision: %s' % git_id
357 def branch_exists(branch):
358 return ref_exists('refs/heads/%s' % branch)
360 def create_branch(new_branch, tree_id = None):
361 """Create a new branch in the git repository
363 if branch_exists(new_branch):
364 raise GitException, 'Branch "%s" already exists' % new_branch
366 current_head_file = get_head_file()
367 current_head = get_head()
368 set_head_file(new_branch)
369 __set_head(current_head)
371 # a checkout isn't needed if new branch points to the current head
376 # Tree switching failed. Revert the head file
377 set_head_file(current_head_file)
378 delete_branch(new_branch)
381 if os.path.isfile(os.path.join(basedir.get(), 'MERGE_HEAD')):
382 os.remove(os.path.join(basedir.get(), 'MERGE_HEAD'))
384 def switch_branch(new_branch):
385 """Switch to a git branch
389 if not branch_exists(new_branch):
390 raise GitException, 'Branch "%s" does not exist' % new_branch
392 tree_id = rev_parse('refs/heads/%s^{commit}' % new_branch)
393 if tree_id != get_head():
396 GRun('read-tree', '-u', '-m', get_head(), tree_id).run()
397 except GitRunException:
398 raise GitException, 'read-tree failed (local changes maybe?)'
400 set_head_file(new_branch)
402 if os.path.isfile(os.path.join(basedir.get(), 'MERGE_HEAD')):
403 os.remove(os.path.join(basedir.get(), 'MERGE_HEAD'))
406 if not ref_exists(ref):
407 raise GitException, '%s does not exist' % ref
408 sha1 = GRun('show-ref', '-s', ref).output_one_line()
410 GRun('update-ref', '-d', ref, sha1).run()
411 except GitRunException:
412 raise GitException, 'Failed to delete ref %s' % ref
414 def delete_branch(name):
415 delete_ref('refs/heads/%s' % name)
417 def rename_ref(from_ref, to_ref):
418 if not ref_exists(from_ref):
419 raise GitException, '"%s" does not exist' % from_ref
420 if ref_exists(to_ref):
421 raise GitException, '"%s" already exists' % to_ref
423 sha1 = GRun('show-ref', '-s', from_ref).output_one_line()
425 GRun('update-ref', to_ref, sha1, '0'*40).run()
426 except GitRunException:
427 raise GitException, 'Failed to create new ref %s' % to_ref
429 GRun('update-ref', '-d', from_ref, sha1).run()
430 except GitRunException:
431 raise GitException, 'Failed to delete ref %s' % from_ref
433 def rename_branch(from_name, to_name):
434 """Rename a git branch."""
435 rename_ref('refs/heads/%s' % from_name, 'refs/heads/%s' % to_name)
437 if get_head_file() == from_name:
438 set_head_file(to_name)
439 except DetachedHeadException:
440 pass # detached HEAD, so the renamee can't be the current branch
441 reflog_dir = os.path.join(basedir.get(), 'logs', 'refs', 'heads')
442 if os.path.exists(reflog_dir) \
443 and os.path.exists(os.path.join(reflog_dir, from_name)):
444 rename(reflog_dir, from_name, to_name)
447 """Add the files or recursively add the directory contents
449 # generate the file list
452 if not os.path.exists(i):
453 raise GitException, 'Unknown file or directory: %s' % i
456 # recursive search. We only add files
457 for root, dirs, local_files in os.walk(i):
458 for name in [os.path.join(root, f) for f in local_files]:
459 if os.path.isfile(name):
460 files.append(os.path.normpath(name))
461 elif os.path.isfile(i):
462 files.append(os.path.normpath(i))
464 raise GitException, '%s is not a file or directory' % i
468 GRun('update-index', '--add', '--').xargs(files)
469 except GitRunException:
470 raise GitException, 'Unable to add file'
472 def __copy_single(source, target, target2=''):
473 """Copy file or dir named 'source' to name target+target2"""
475 # "source" (file or dir) must match one or more git-controlled file
476 realfiles = GRun('ls-files', source).output_lines()
477 if len(realfiles) == 0:
478 raise GitException, '"%s" matches no git-controled files' % source
480 if os.path.isdir(source):
481 # physically copy the files, and record them to add them in one run
483 re_string='^'+source+'/(.*)$'
484 prefix_regexp = re.compile(re_string)
485 for f in [f.strip() for f in realfiles]:
486 m = prefix_regexp.match(f)
488 raise Exception, '"%s" does not match "%s"' % (f, re_string)
489 newname = target+target2+'/'+m.group(1)
490 if not os.path.exists(os.path.dirname(newname)):
491 os.makedirs(os.path.dirname(newname))
493 newfiles.append(newname)
496 else: # files, symlinks, ...
497 newname = target+target2
498 copyfile(source, newname)
502 def copy(filespecs, target):
503 if os.path.isdir(target):
504 # target is a directory: copy each entry on the command line,
505 # with the same name, into the target
506 target = target.rstrip('/')
508 # first, check that none of the children of the target
509 # matching the command line aleady exist
510 for filespec in filespecs:
511 entry = target+ '/' + os.path.basename(filespec.rstrip('/'))
512 if os.path.exists(entry):
513 raise GitException, 'Target "%s" already exists' % entry
515 for filespec in filespecs:
516 filespec = filespec.rstrip('/')
517 basename = '/' + os.path.basename(filespec)
518 __copy_single(filespec, target, basename)
520 elif os.path.exists(target):
521 raise GitException, 'Target "%s" exists but is not a directory' % target
522 elif len(filespecs) != 1:
523 raise GitException, 'Cannot copy more than one file to non-directory'
526 # at this point: len(filespecs)==1 and target does not exist
528 # check target directory
529 targetdir = os.path.dirname(target)
530 if targetdir != '' and not os.path.isdir(targetdir):
531 raise GitException, 'Target directory "%s" does not exist' % targetdir
533 __copy_single(filespecs[0].rstrip('/'), target)
536 def rm(files, force = False):
537 """Remove a file from the repository
541 if os.path.exists(f):
542 raise GitException, '%s exists. Remove it first' %f
544 GRun('update-index', '--remove', '--').xargs(files)
547 GRun('update-index', '--force-remove', '--').xargs(files)
555 """Return the user information.
559 name=config.get('user.name')
560 email=config.get('user.email')
561 __user = Person(name, email)
565 """Return the author information.
570 # the environment variables take priority over config
572 date = os.environ['GIT_AUTHOR_DATE']
575 __author = Person(os.environ['GIT_AUTHOR_NAME'],
576 os.environ['GIT_AUTHOR_EMAIL'],
583 """Return the author information.
588 # the environment variables take priority over config
590 date = os.environ['GIT_COMMITTER_DATE']
593 __committer = Person(os.environ['GIT_COMMITTER_NAME'],
594 os.environ['GIT_COMMITTER_EMAIL'],
600 def update_cache(files = None, force = False):
601 """Update the cache information for the given files
603 cache_files = tree_status(files, verbose = False)
605 # everything is up-to-date
606 if len(cache_files) == 0:
609 # check for unresolved conflicts
610 if not force and [x for x in cache_files
611 if x[0] not in ['M', 'N', 'A', 'D']]:
612 raise GitException, 'Updating cache failed: unresolved conflicts'
615 add_files = [x[1] for x in cache_files if x[0] in ['N', 'A']]
616 rm_files = [x[1] for x in cache_files if x[0] in ['D']]
617 m_files = [x[1] for x in cache_files if x[0] in ['M']]
619 GRun('update-index', '--add', '--').xargs(add_files)
620 GRun('update-index', '--force-remove', '--').xargs(rm_files)
621 GRun('update-index', '--').xargs(m_files)
625 def commit(message, files = None, parents = None, allowempty = False,
626 cache_update = True, tree_id = None, set_head = False,
627 author_name = None, author_email = None, author_date = None,
628 committer_name = None, committer_email = None):
629 """Commit the current tree to repository
634 # Get the tree status
635 if cache_update and parents != []:
636 changes = update_cache(files)
637 if not changes and not allowempty:
638 raise GitException, 'No changes to commit'
640 # get the commit message
643 elif message[-1:] != '\n':
646 # write the index to repository
648 tree_id = GRun('write-tree').output_one_line()
654 env['GIT_AUTHOR_NAME'] = author_name
656 env['GIT_AUTHOR_EMAIL'] = author_email
658 env['GIT_AUTHOR_DATE'] = author_date
660 env['GIT_COMMITTER_NAME'] = committer_name
662 env['GIT_COMMITTER_EMAIL'] = committer_email
663 commit_id = GRun('commit-tree', tree_id,
664 *sum([['-p', p] for p in parents], [])
665 ).env(env).raw_input(message).output_one_line()
667 __set_head(commit_id)
671 def apply_diff(rev1, rev2, check_index = True, files = None):
672 """Apply the diff between rev1 and rev2 onto the current
673 index. This function doesn't need to raise an exception since it
674 is only used for fast-pushing a patch. If this operation fails,
675 the pushing would fall back to the three-way merge.
678 index_opt = ['--index']
685 diff_str = diff(files, rev1, rev2)
688 GRun('apply', *index_opt).raw_input(
689 diff_str).discard_stderr().no_output()
690 except GitRunException:
695 stages_re = re.compile('^([0-7]+) ([0-9a-f]{40}) ([1-3])\t(.*)$', re.S)
697 def merge_recursive(base, head1, head2):
698 """Perform a 3-way merge between base, head1 and head2 into the
702 p = GRun('merge-recursive', base, '--', head1, head2).env(
703 { 'GITHEAD_%s' % base: 'ancestor',
704 'GITHEAD_%s' % head1: 'current',
705 'GITHEAD_%s' % head2: 'patched'}).returns([0, 1])
706 output = p.output_lines()
708 # There were conflicts
709 conflicts = [l.strip() for l in output if l.startswith('CONFLICT')]
712 # try the interactive merge or stage checkout (if enabled)
713 for filename in get_conflicts():
714 if (gitmergeonefile.merge(filename)):
715 # interactive merge succeeded
718 # any conflicts left unsolved?
719 cn = len(get_conflicts())
721 raise GitException, "%d conflict(s)" % cn
723 def diff(files = None, rev1 = 'HEAD', rev2 = None, diff_flags = [],
725 """Show the diff between rev1 and rev2
729 if binary and '--binary' not in diff_flags:
730 diff_flags = diff_flags + ['--binary']
733 return GRun('diff-tree', '-p',
734 *(diff_flags + [rev1, rev2, '--'] + files)).raw_output()
738 return GRun('diff-index', '-p', '-R',
739 *(diff_flags + [rev2, '--'] + files)).raw_output()
741 return GRun('diff-index', '-p',
742 *(diff_flags + [rev1, '--'] + files)).raw_output()
746 # TODO: take another parameter representing a diff string as we
747 # usually invoke git.diff() form the calling functions
748 def diffstat(files = None, rev1 = 'HEAD', rev2 = None):
749 """Return the diffstat between rev1 and rev2."""
750 return GRun('apply', '--stat', '--summary'
751 ).raw_input(diff(files, rev1, rev2)).raw_output()
753 def files(rev1, rev2, diff_flags = []):
754 """Return the files modified between rev1 and rev2
758 for line in GRun('diff-tree', *(diff_flags + ['-r', rev1, rev2])
760 result.append('%s %s' % tuple(line.split(' ', 4)[-1].split('\t', 1)))
762 return '\n'.join(result)
764 def barefiles(rev1, rev2):
765 """Return the files modified between rev1 and rev2, without status info
769 for line in GRun('diff-tree', '-r', rev1, rev2).output_lines():
770 result.append(line.split(' ', 4)[-1].split('\t', 1)[-1])
772 return '\n'.join(result)
774 def pretty_commit(commit_id = 'HEAD', flags = []):
775 """Return a given commit (log + diff)
777 return GRun('show', *(flags + [commit_id])).raw_output()
779 def checkout(files = None, tree_id = None, force = False):
780 """Check out the given or all files
784 GRun('read-tree', '--reset', tree_id).run()
785 except GitRunException:
786 raise GitException, 'Failed "git read-tree" --reset %s' % tree_id
788 cmd = ['checkout-index', '-q', '-u']
792 GRun(*(cmd + ['--'])).xargs(files)
794 GRun(*(cmd + ['-a'])).run()
796 def switch(tree_id, keep = False):
797 """Switch the tree to the given id
800 # only update the index while keeping the local changes
801 GRun('read-tree', tree_id).run()
805 GRun('read-tree', '-u', '-m', get_head(), tree_id).run()
806 except GitRunException:
807 raise GitException, 'read-tree failed (local changes maybe?)'
811 def reset(files = None, tree_id = None, check_out = True):
812 """Revert the tree changes relative to the given tree_id. It removes
819 cache_files = tree_status(files, tree_id)
820 # files which were added but need to be removed
821 rm_files = [x[1] for x in cache_files if x[0] in ['A']]
823 checkout(files, tree_id, True)
824 # checkout doesn't remove files
825 map(os.remove, rm_files)
827 # if the reset refers to the whole tree, switch the HEAD as well
831 def resolved(filenames, reset = None):
833 stage = {'ancestor': 1, 'current': 2, 'patched': 3}[reset]
834 GRun('checkout-index', '--no-create', '--stage=%d' % stage,
835 '--stdin', '-z').input_nulterm(filenames).no_output()
836 GRun('update-index', '--add', '--').xargs(filenames)
837 for filename in filenames:
838 gitmergeonefile.clean_up(filename)
839 # update the access and modificatied times
840 os.utime(filename, None)
842 def fetch(repository = 'origin', refspec = None):
843 """Fetches changes from the remote repository, using 'git fetch'
853 command = config.get('branch.%s.stgit.fetchcmd' % get_head_file()) or \
854 config.get('stgit.fetchcmd')
855 Run(*(command.split() + args)).run()
857 def pull(repository = 'origin', refspec = None):
858 """Fetches changes from the remote repository, using 'git pull'
868 command = config.get('branch.%s.stgit.pullcmd' % get_head_file()) or \
869 config.get('stgit.pullcmd')
870 Run(*(command.split() + args)).run()
872 def rebase(tree_id = None):
873 """Rebase the current tree to the give tree_id. The tree_id
874 argument may be something other than a GIT id if an external
877 command = config.get('branch.%s.stgit.rebasecmd' % get_head_file()) \
878 or config.get('stgit.rebasecmd')
884 raise GitException, 'Default rebasing requires a commit id'
886 # clear the HEAD cache as the custom rebase command will update it
888 Run(*(command.split() + args)).run()
891 reset(tree_id = tree_id)
894 """Repack all objects into a single pack
896 GRun('repack', '-a', '-d', '-f').run()
898 def apply_patch(filename = None, diff = None, base = None,
900 """Apply a patch onto the current or given index. There must not
901 be any local changes in the tree, otherwise the command fails
913 orig_head = get_head()
919 GRun('apply', '--index').raw_input(diff).no_output()
920 except GitRunException:
924 # write the failed diff to a file
925 f = file('.stgit-failed.patch', 'w+')
928 out.warn('Diff written to the .stgit-failed.patch file')
933 top = commit(message = 'temporary commit used for applying a patch',
936 merge_recursive(base, orig_head, top)
938 def clone(repository, local_dir):
939 """Clone a remote repository. At the moment, just use the
942 GRun('clone', repository, local_dir).run()
944 def modifying_revs(files, base_rev, head_rev):
945 """Return the revisions from the list modifying the given files."""
946 return GRun('rev-list', '%s..%s' % (base_rev, head_rev), '--', *files
949 def refspec_localpart(refspec):
950 m = re.match('^[^:]*:([^:]*)$', refspec)
954 raise GitException, 'Cannot parse refspec "%s"' % line
956 def refspec_remotepart(refspec):
957 m = re.match('^([^:]*):[^:]*$', refspec)
961 raise GitException, 'Cannot parse refspec "%s"' % line
964 def __remotes_from_config():
965 return config.sections_matching(r'remote\.(.*)\.url')
967 def __remotes_from_dir(dir):
968 d = os.path.join(basedir.get(), dir)
969 if os.path.exists(d):
975 """Return the list of remotes in the repository
977 return (set(__remotes_from_config())
978 | set(__remotes_from_dir('remotes'))
979 | set(__remotes_from_dir('branches')))
981 def remotes_local_branches(remote):
982 """Returns the list of local branches fetched from given remote
986 if remote in __remotes_from_config():
987 for line in config.getall('remote.%s.fetch' % remote):
988 branches.append(refspec_localpart(line))
989 elif remote in __remotes_from_dir('remotes'):
990 stream = open(os.path.join(basedir.get(), 'remotes', remote), 'r')
992 # Only consider Pull lines
993 m = re.match('^Pull: (.*)\n$', line)
995 branches.append(refspec_localpart(m.group(1)))
997 elif remote in __remotes_from_dir('branches'):
998 # old-style branches only declare one branch
999 branches.append('refs/heads/'+remote);
1001 raise GitException, 'Unknown remote "%s"' % remote
1005 def identify_remote(branchname):
1006 """Return the name for the remote to pull the given branchname
1007 from, or None if we believe it is a local branch.
1010 for remote in remotes_list():
1011 if branchname in remotes_local_branches(remote):
1014 # if we get here we've found nothing, the branch is a local one
1018 """Return the git id for the tip of the parent branch as left by
1023 stream = open(os.path.join(basedir.get(), 'FETCH_HEAD'), "r")
1025 # Only consider lines not tagged not-for-merge
1026 m = re.match('^([^\t]*)\t\t', line)
1029 raise GitException, 'StGit does not support multiple FETCH_HEAD'
1031 fetch_head=m.group(1)
1035 out.warn('No for-merge remote head found in FETCH_HEAD')
1037 # here we are sure to have a single fetch_head
1041 """Return a list of all refs in the current repository.
1044 return [line.split()[1] for line in GRun('show-ref').output_lines()]