3 # Copyright (c) 2012 Felipe Contreras
6 # Inspired by Rocco Rutte's hg-fast-export
8 # Just copy to your ~/bin, or anywhere in your $PATH.
9 # Then you can clone with:
10 # git clone hg::/path/to/mercurial/repo/
12 # For remote repositories a local clone is stored in
13 # "$GIT_DIR/hg/origin/clone/.hg/".
15 from mercurial import hg, ui, bookmarks, context, encoding, node, error, extensions
25 import urlparse, hashlib
28 # If you want to switch to hg-git compatibility mode:
29 # git config --global remote-hg.hg-git-compat true
31 # If you are not in hg-git-compat mode and want to disable the tracking of
33 # git config --global remote-hg.track-branches false
35 # If you don't want to force pushes (and thus risk creating new remote heads):
36 # git config --global remote-hg.force-push false
38 # If you want the equivalent of hg's clone/pull--insecure option:
39 # git config remote-hg.insecure true
42 # Sensible defaults for git.
43 # hg bookmarks are exported as git branches, hg branches are prefixed
44 # with 'branches/', HEAD is a special case.
48 # Only hg bookmarks are exported as git branches.
49 # Commits are modified to preserve hg information and allow bidirectionality.
52 NAME_RE = re.compile('^([^<>]+)')
53 AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
54 EMAIL_RE = re.compile('^([^<>]+[^ \\\t<>])?\\b(?:[ \\t<>]*?)\\b([^ \\t<>]+@[^ \\t<>]+)')
55 AUTHOR_HG_RE = re.compile('^(.*?) ?<(.*?)(?:>(.+)?)?$')
56 RAW_AUTHOR_RE = re.compile('^(\w+) (?:(.+)? )?<(.*)> (\d+) ([+-]\d+)')
59 sys.stderr.write('ERROR: %s\n' % (msg % args))
63 sys.stderr.write('WARNING: %s\n' % (msg % args))
66 return 'l' in flags and '120000' or 'x' in flags and '100755' or '100644'
69 return '%+03d%02d' % (-tz / 3600, -tz % 3600 / 60)
72 m = { '100755': 'x', '120000': 'l' }
73 return m.get(mode, '')
76 return hg.node.hex(node)
79 return ref.replace('___', ' ')
82 return ref.replace(' ', '___')
84 def get_config(config):
85 cmd = ['git', 'config', '--get', config]
86 process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
87 output, _ = process.communicate()
90 def get_config_bool(config, default=False):
91 value = get_config(config).rstrip('\n')
94 elif value == "false":
101 def __init__(self, path):
111 if not os.path.exists(self.path):
114 tmp = json.load(open(self.path))
116 self.tips = tmp['tips']
117 self.marks = tmp['marks']
118 self.last_mark = tmp['last-mark']
120 for rev, mark in self.marks.iteritems():
121 self.rev_marks[mark] = int(rev)
124 return { 'tips': self.tips, 'marks': self.marks, 'last-mark' : self.last_mark }
127 json.dump(self.dict(), open(self.path, 'w'))
130 return str(self.dict())
132 def from_rev(self, rev):
133 return self.marks[str(rev)]
135 def to_rev(self, mark):
136 return self.rev_marks[mark]
140 return self.last_mark
142 def get_mark(self, rev):
144 self.marks[str(rev)] = self.last_mark
145 return self.last_mark
147 def new_mark(self, rev, mark):
148 self.marks[str(rev)] = mark
149 self.rev_marks[mark] = rev
150 self.last_mark = mark
152 def is_marked(self, rev):
153 return str(rev) in self.marks
155 def get_tip(self, branch):
156 return self.tips.get(branch, 0)
158 def set_tip(self, branch, tip):
159 self.tips[branch] = tip
163 def __init__(self, repo):
165 self.line = self.get_line()
168 return sys.stdin.readline().strip()
170 def __getitem__(self, i):
171 return self.line.split()[i]
173 def check(self, word):
174 return self.line.startswith(word)
176 def each_block(self, separator):
177 while self.line != separator:
179 self.line = self.get_line()
182 return self.each_block('')
185 self.line = self.get_line()
186 if self.line == 'done':
190 i = self.line.index(':') + 1
191 return int(self.line[i:])
194 if not self.check('data'):
196 i = self.line.index(' ') + 1
197 size = int(self.line[i:])
198 return sys.stdin.read(size)
200 def get_author(self):
204 m = RAW_AUTHOR_RE.match(self.line)
207 _, name, email, date, tz = m.groups()
208 if name and 'ext:' in name:
209 m = re.match('^(.+?) ext:\((.+)\)$', name)
212 ex = urllib.unquote(m.group(2))
214 if email != bad_mail:
216 user = '%s <%s>' % (name, email)
218 user = '<%s>' % (email)
226 tz = ((tz / 100) * 3600) + ((tz % 100) * 60)
227 return (user, int(date), -tz)
229 def fix_file_path(path):
230 if not os.path.isabs(path):
232 return os.path.relpath(path, '/')
234 def export_files(files):
235 global marks, filenodes
239 fid = node.hex(f.filenode())
242 mark = filenodes[fid]
244 mark = marks.next_mark()
245 filenodes[fid] = mark
249 print "mark :%u" % mark
250 print "data %d" % len(d)
253 path = fix_file_path(f.path())
254 final.append((gitmode(f.flags()), mark, path))
258 def get_filechanges(repo, ctx, parent):
263 # load earliest manifest first for caching reasons
264 prev = repo[parent].manifest().copy()
269 if (cur.flags(fn) != prev.flags(fn) or cur[fn] != prev[fn]):
274 removed |= set(prev.keys())
276 return added | modified, removed
278 def fixup_user_git(user):
280 user = user.replace('"', '')
281 m = AUTHOR_RE.match(user)
284 mail = m.group(2).strip()
286 m = EMAIL_RE.match(user)
291 m = NAME_RE.match(user)
293 name = m.group(1).strip()
296 def fixup_user_hg(user):
298 # stole this from hg-git
299 return re.sub('[<>\n]', '?', name.lstrip('< ').rstrip('> '))
301 m = AUTHOR_HG_RE.match(user)
303 name = sanitize(m.group(1))
304 mail = sanitize(m.group(2))
307 name += ' ext:(' + urllib.quote(ex) + ')'
309 name = sanitize(user)
317 def fixup_user(user):
318 global mode, bad_mail
321 name, mail = fixup_user_git(user)
323 name, mail = fixup_user_hg(user)
330 return '%s <%s>' % (name, mail)
332 def get_repo(url, alias):
336 myui.setconfig('ui', 'interactive', 'off')
337 myui.fout = sys.stderr
339 if get_config_bool('remote-hg.insecure'):
340 myui.setconfig('web', 'cacerts', '')
343 mod = extensions.load(myui, 'hgext.schemes', None)
349 repo = hg.repository(myui, url)
351 local_path = os.path.join(dirname, 'clone')
352 if not os.path.exists(local_path):
354 peer, dstpeer = hg.clone(myui, {}, url, local_path, update=True, pull=True)
356 die('Repository error')
357 repo = dstpeer.local()
359 repo = hg.repository(myui, local_path)
361 peer = hg.peer(myui, {}, url)
363 die('Repository error')
364 repo.pull(peer, heads=None, force=True)
366 rb = peer.listkeys('bookmarks')
367 bookmarks.updatefromremote(myui, repo, rb, url)
371 def rev_to_mark(rev):
373 return marks.from_rev(rev)
375 def mark_to_rev(mark):
377 return marks.to_rev(mark)
379 def export_ref(repo, name, kind, head):
380 global prefix, marks, mode
382 ename = '%s/%s' % (kind, name)
383 tip = marks.get_tip(ename)
385 revs = xrange(tip, head.rev() + 1)
388 revs = [rev for rev in revs if not marks.is_marked(rev)]
393 (manifest, user, (time, tz), files, desc, extra) = repo.changelog.read(c.node())
394 rev_branch = extra['branch']
396 author = "%s %d %s" % (fixup_user(user), time, gittz(tz))
397 if 'committer' in extra:
398 user, time, tz = extra['committer'].rsplit(' ', 2)
399 committer = "%s %s %s" % (user, time, gittz(int(tz)))
403 parents = [p for p in repo.changelog.parentrevs(rev) if p >= 0]
405 if len(parents) == 0:
406 modified = c.manifest().keys()
409 modified, removed = get_filechanges(repo, c, parents[0])
416 if rev_branch != 'default':
417 extra_msg += 'branch : %s\n' % rev_branch
421 if f not in c.manifest():
423 rename = c.filectx(f).renamed()
425 renames.append((rename[0], f))
428 extra_msg += "rename : %s => %s\n" % e
430 for key, value in extra.iteritems():
431 if key in ('author', 'committer', 'encoding', 'message', 'branch', 'hg-git'):
434 extra_msg += "extra : %s : %s\n" % (key, urllib.quote(value))
437 desc += '\n--HG--\n' + extra_msg
439 if len(parents) == 0 and rev:
440 print 'reset %s/%s' % (prefix, ename)
442 modified_final = export_files(c.filectx(f) for f in modified)
444 print "commit %s/%s" % (prefix, ename)
445 print "mark :%d" % (marks.get_mark(rev))
446 print "author %s" % (author)
447 print "committer %s" % (committer)
448 print "data %d" % (len(desc))
452 print "from :%s" % (rev_to_mark(parents[0]))
454 print "merge :%s" % (rev_to_mark(parents[1]))
456 for f in modified_final:
457 print "M %s :%u %s" % f
459 print "D %s" % (fix_file_path(f))
463 if (count % 100 == 0):
464 print "progress revision %d '%s' (%d/%d)" % (rev, name, count, len(revs))
466 # make sure the ref is updated
467 print "reset %s/%s" % (prefix, ename)
468 print "from :%u" % rev_to_mark(rev)
471 marks.set_tip(ename, rev)
473 def export_tag(repo, tag):
474 export_ref(repo, tag, 'tags', repo[hgref(tag)])
476 def export_bookmark(repo, bmark):
477 head = bmarks[hgref(bmark)]
478 export_ref(repo, bmark, 'bookmarks', head)
480 def export_branch(repo, branch):
481 tip = get_branch_tip(repo, branch)
483 export_ref(repo, branch, 'branches', head)
485 def export_head(repo):
487 export_ref(repo, g_head[0], 'bookmarks', g_head[1])
489 def do_capabilities(parser):
490 global prefix, dirname
494 print "refspec refs/heads/branches/*:%s/branches/*" % prefix
495 print "refspec refs/heads/*:%s/bookmarks/*" % prefix
496 print "refspec refs/tags/*:%s/tags/*" % prefix
498 path = os.path.join(dirname, 'marks-git')
500 if os.path.exists(path):
501 print "*import-marks %s" % path
502 print "*export-marks %s" % path
506 def branch_tip(repo, branch):
507 # older versions of mercurial don't have this
508 if hasattr(repo, 'branchtip'):
509 return repo.branchtip(branch)
511 return repo.branchtags()[branch]
513 def get_branch_tip(repo, branch):
516 heads = branches.get(hgref(branch), None)
520 # verify there's only one head
522 warn("Branch '%s' has more than one head, consider merging" % branch)
523 return branch_tip(repo, hgref(branch))
527 def list_head(repo, cur):
528 global g_head, bmarks
530 head = bookmarks.readcurrent(repo)
534 # fake bookmark from current branch
541 if head == 'default':
546 print "@refs/heads/%s HEAD" % head
547 g_head = (head, node)
550 global branches, bmarks, track_branches
553 for bmark, node in bookmarks.listbookmarks(repo).iteritems():
554 bmarks[bmark] = repo[node]
556 cur = repo.dirstate.branch()
561 for branch in repo.branchmap():
562 heads = repo.branchheads(branch)
564 branches[branch] = heads
566 for branch in branches:
567 print "? refs/heads/branches/%s" % gitref(branch)
570 print "? refs/heads/%s" % gitref(bmark)
572 for tag, node in repo.tagslist():
575 print "? refs/tags/%s" % gitref(tag)
579 def do_import(parser):
582 path = os.path.join(dirname, 'marks-git')
585 if os.path.exists(path):
586 print "feature import-marks=%s" % path
587 print "feature export-marks=%s" % path
590 tmp = encoding.encoding
591 encoding.encoding = 'utf-8'
593 # lets get all the import lines
594 while parser.check('import'):
599 elif ref.startswith('refs/heads/branches/'):
600 branch = ref[len('refs/heads/branches/'):]
601 export_branch(repo, branch)
602 elif ref.startswith('refs/heads/'):
603 bmark = ref[len('refs/heads/'):]
604 export_bookmark(repo, bmark)
605 elif ref.startswith('refs/tags/'):
606 tag = ref[len('refs/tags/'):]
607 export_tag(repo, tag)
611 encoding.encoding = tmp
615 def parse_blob(parser):
619 mark = parser.get_mark()
621 data = parser.get_data()
622 blob_marks[mark] = data
625 def get_merge_files(repo, p1, p2, files):
626 for e in repo[p1].files():
628 if e not in repo[p1].manifest():
630 f = { 'ctx' : repo[p1][e] }
633 def parse_commit(parser):
634 global marks, blob_marks, parsed_refs
637 from_mark = merge_mark = None
642 commit_mark = parser.get_mark()
644 author = parser.get_author()
646 committer = parser.get_author()
648 data = parser.get_data()
650 if parser.check('from'):
651 from_mark = parser.get_mark()
653 if parser.check('merge'):
654 merge_mark = parser.get_mark()
656 if parser.check('merge'):
657 die('octopus merges are not supported yet')
659 # fast-export adds an extra newline
666 if parser.check('M'):
667 t, m, mark_ref, path = line.split(' ', 3)
668 mark = int(mark_ref[1:])
669 f = { 'mode' : hgmode(m), 'data' : blob_marks[mark] }
670 elif parser.check('D'):
671 t, path = line.split(' ', 1)
672 f = { 'deleted' : True }
674 die('Unknown file command: %s' % line)
677 def getfilectx(repo, memctx, f):
683 is_exec = of['mode'] == 'x'
684 is_link = of['mode'] == 'l'
685 rename = of.get('rename', None)
686 return context.memfilectx(f, of['data'],
687 is_link, is_exec, rename)
691 user, date, tz = author
694 if committer != author:
695 extra['committer'] = "%s %u %u" % committer
698 p1 = repo.changelog.node(mark_to_rev(from_mark))
703 p2 = repo.changelog.node(mark_to_rev(merge_mark))
708 # If files changed from any of the parents, hg wants to know, but in git if
709 # nothing changed from the first parent, nothing changed.
712 get_merge_files(repo, p1, p2, files)
714 # Check if the ref is supposed to be a named branch
715 if ref.startswith('refs/heads/branches/'):
716 branch = ref[len('refs/heads/branches/'):]
717 extra['branch'] = hgref(branch)
720 i = data.find('\n--HG--\n')
722 tmp = data[i + len('\n--HG--\n'):].strip()
723 for k, v in [e.split(' : ', 1) for e in tmp.split('\n')]:
725 old, new = v.split(' => ', 1)
726 files[new]['rename'] = old
730 ek, ev = v.split(' : ', 1)
731 extra[ek] = urllib.unquote(ev)
734 ctx = context.memctx(repo, (p1, p2), data,
735 files.keys(), getfilectx,
736 user, (date, tz), extra)
738 tmp = encoding.encoding
739 encoding.encoding = 'utf-8'
741 node = repo.commitctx(ctx)
743 encoding.encoding = tmp
745 rev = repo[node].rev()
747 parsed_refs[ref] = node
748 marks.new_mark(rev, commit_mark)
750 def parse_reset(parser):
756 if parser.check('commit'):
759 if not parser.check('from'):
761 from_mark = parser.get_mark()
764 node = parser.repo.changelog.node(mark_to_rev(from_mark))
765 parsed_refs[ref] = node
767 def parse_tag(parser):
770 from_mark = parser.get_mark()
772 tagger = parser.get_author()
774 data = parser.get_data()
777 parsed_tags[name] = (tagger, data)
779 def write_tag(repo, tag, node, msg, author):
780 branch = repo[node].branch()
781 tip = branch_tip(repo, branch)
784 def getfilectx(repo, memctx, f):
786 fctx = tip.filectx(f)
788 except error.ManifestLookupError:
790 content = data + "%s %s\n" % (hghex(node), tag)
791 return context.memfilectx(f, content, False, False, None)
796 author = (None, 0, 0)
797 user, date, tz = author
799 ctx = context.memctx(repo, (p1, p2), msg,
800 ['.hgtags'], getfilectx,
801 user, (date, tz), {'branch' : branch})
803 tmp = encoding.encoding
804 encoding.encoding = 'utf-8'
806 tagnode = repo.commitctx(ctx)
808 encoding.encoding = tmp
812 def do_export(parser):
813 global parsed_refs, bmarks, peer
819 for line in parser.each_block('done'):
820 if parser.check('blob'):
822 elif parser.check('commit'):
824 elif parser.check('reset'):
826 elif parser.check('tag'):
828 elif parser.check('feature'):
831 die('unhandled export command: %s' % line)
833 for ref, node in parsed_refs.iteritems():
834 if ref.startswith('refs/heads/branches'):
835 branch = ref[len('refs/heads/branches/'):]
836 if branch in branches and node in branches[branch]:
840 elif ref.startswith('refs/heads/'):
841 bmark = ref[len('refs/heads/'):]
842 p_bmarks.append((bmark, node))
844 elif ref.startswith('refs/tags/'):
845 tag = ref[len('refs/tags/'):]
847 author, msg = parsed_tags.get(tag, (None, None))
850 msg = 'Added tag %s for changeset %s' % (tag, hghex(node[:6]));
851 write_tag(parser.repo, tag, node, msg, author)
853 fp = parser.repo.opener('localtags', 'a')
854 fp.write('%s %s\n' % (hghex(node), tag))
858 # transport-helper/fast-export bugs
862 parser.repo.push(peer, force=force_push, newbranch=True)
865 for bmark, node in p_bmarks:
866 ref = 'refs/heads/' + bmark
870 old = bmarks[bmark].hex()
877 if bmark == 'master' and 'master' not in parser.repo._bookmarks:
881 elif bookmarks.pushbookmark(parser.repo, bmark, old, new):
885 print "error %s" % ref
889 rb = peer.listkeys('bookmarks')
890 old = rb.get(bmark, '')
891 if not peer.pushkey('bookmarks', bmark, old, new):
892 print "error %s" % ref
899 def fix_path(alias, repo, orig_url):
900 url = urlparse.urlparse(orig_url, 'file')
901 if url.scheme != 'file' or os.path.isabs(url.path):
903 abs_url = urlparse.urljoin("%s/" % os.getcwd(), orig_url)
904 cmd = ['git', 'config', 'remote.%s.url' % alias, "hg::%s" % abs_url]
908 global prefix, dirname, branches, bmarks
909 global marks, blob_marks, parsed_refs
910 global peer, mode, bad_mail, bad_name
911 global track_branches, force_push, is_tmp
919 hg_git_compat = get_config_bool('remote-hg.hg-git-compat')
920 track_branches = get_config_bool('remote-hg.track-branches', True)
921 force_push = get_config_bool('remote-hg.force-push')
925 bad_mail = 'none@none'
934 alias = hashlib.sha1(alias).hexdigest()
938 gitdir = os.environ['GIT_DIR']
939 dirname = os.path.join(gitdir, 'hg', alias)
948 repo = get_repo(url, alias)
949 prefix = 'refs/hg/%s' % alias
952 fix_path(alias, peer or repo, url)
954 if not os.path.exists(dirname):
957 marks_path = os.path.join(dirname, 'marks-hg')
958 marks = Marks(marks_path)
960 parser = Parser(repo)
962 if parser.check('capabilities'):
963 do_capabilities(parser)
964 elif parser.check('list'):
966 elif parser.check('import'):
968 elif parser.check('export'):
971 die('unhandled command: %s' % line)
980 shutil.rmtree(dirname)
983 sys.exit(main(sys.argv))