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-rwxr-xr-xcontrib/remote-helpers/git-remote-hg794
1 files changed, 794 insertions, 0 deletions
diff --git a/contrib/remote-helpers/git-remote-hg b/contrib/remote-helpers/git-remote-hg
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+++ b/contrib/remote-helpers/git-remote-hg
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+#!/usr/bin/env python
+#
+# Copyright (c) 2012 Felipe Contreras
+#
+
+# Inspired by Rocco Rutte's hg-fast-export
+
+# Just copy to your ~/bin, or anywhere in your $PATH.
+# Then you can clone with:
+# git clone hg::/path/to/mercurial/repo/
+
+from mercurial import hg, ui, bookmarks, context, util, encoding
+
+import re
+import sys
+import os
+import json
+import shutil
+import subprocess
+import urllib
+
+#
+# If you want to switch to hg-git compatibility mode:
+# git config --global remote-hg.hg-git-compat true
+#
+# git:
+# Sensible defaults for git.
+# hg bookmarks are exported as git branches, hg branches are prefixed
+# with 'branches/', HEAD is a special case.
+#
+# hg:
+# Emulate hg-git.
+# Only hg bookmarks are exported as git branches.
+# Commits are modified to preserve hg information and allow biridectionality.
+#
+
+NAME_RE = re.compile('^([^<>]+)')
+AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
+AUTHOR_HG_RE = re.compile('^(.*?) ?<(.*?)(?:>(.+)?)?$')
+RAW_AUTHOR_RE = re.compile('^(\w+) (?:(.+)? )?<(.*)> (\d+) ([+-]\d+)')
+
+def die(msg, *args):
+ sys.stderr.write('ERROR: %s\n' % (msg % args))
+ sys.exit(1)
+
+def warn(msg, *args):
+ sys.stderr.write('WARNING: %s\n' % (msg % args))
+
+def gitmode(flags):
+ return 'l' in flags and '120000' or 'x' in flags and '100755' or '100644'
+
+def gittz(tz):
+ return '%+03d%02d' % (-tz / 3600, -tz % 3600 / 60)
+
+def hgmode(mode):
+ m = { '0100755': 'x', '0120000': 'l' }
+ return m.get(mode, '')
+
+def get_config(config):
+ cmd = ['git', 'config', '--get', config]
+ process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
+ output, _ = process.communicate()
+ return output
+
+class Marks:
+
+ def __init__(self, path):
+ self.path = path
+ self.tips = {}
+ self.marks = {}
+ self.rev_marks = {}
+ self.last_mark = 0
+
+ self.load()
+
+ def load(self):
+ if not os.path.exists(self.path):
+ return
+
+ tmp = json.load(open(self.path))
+
+ self.tips = tmp['tips']
+ self.marks = tmp['marks']
+ self.last_mark = tmp['last-mark']
+
+ for rev, mark in self.marks.iteritems():
+ self.rev_marks[mark] = int(rev)
+
+ def dict(self):
+ return { 'tips': self.tips, 'marks': self.marks, 'last-mark' : self.last_mark }
+
+ def store(self):
+ json.dump(self.dict(), open(self.path, 'w'))
+
+ def __str__(self):
+ return str(self.dict())
+
+ def from_rev(self, rev):
+ return self.marks[str(rev)]
+
+ def to_rev(self, mark):
+ return self.rev_marks[mark]
+
+ def get_mark(self, rev):
+ self.last_mark += 1
+ self.marks[str(rev)] = self.last_mark
+ return self.last_mark
+
+ def new_mark(self, rev, mark):
+ self.marks[str(rev)] = mark
+ self.rev_marks[mark] = rev
+ self.last_mark = mark
+
+ def is_marked(self, rev):
+ return self.marks.has_key(str(rev))
+
+ def get_tip(self, branch):
+ return self.tips.get(branch, 0)
+
+ def set_tip(self, branch, tip):
+ self.tips[branch] = tip
+
+class Parser:
+
+ def __init__(self, repo):
+ self.repo = repo
+ self.line = self.get_line()
+
+ def get_line(self):
+ return sys.stdin.readline().strip()
+
+ def __getitem__(self, i):
+ return self.line.split()[i]
+
+ def check(self, word):
+ return self.line.startswith(word)
+
+ def each_block(self, separator):
+ while self.line != separator:
+ yield self.line
+ self.line = self.get_line()
+
+ def __iter__(self):
+ return self.each_block('')
+
+ def next(self):
+ self.line = self.get_line()
+ if self.line == 'done':
+ self.line = None
+
+ def get_mark(self):
+ i = self.line.index(':') + 1
+ return int(self.line[i:])
+
+ def get_data(self):
+ if not self.check('data'):
+ return None
+ i = self.line.index(' ') + 1
+ size = int(self.line[i:])
+ return sys.stdin.read(size)
+
+ def get_author(self):
+ global bad_mail
+
+ ex = None
+ m = RAW_AUTHOR_RE.match(self.line)
+ if not m:
+ return None
+ _, name, email, date, tz = m.groups()
+ if name and 'ext:' in name:
+ m = re.match('^(.+?) ext:\((.+)\)$', name)
+ if m:
+ name = m.group(1)
+ ex = urllib.unquote(m.group(2))
+
+ if email != bad_mail:
+ if name:
+ user = '%s <%s>' % (name, email)
+ else:
+ user = '<%s>' % (email)
+ else:
+ user = name
+
+ if ex:
+ user += ex
+
+ tz = int(tz)
+ tz = ((tz / 100) * 3600) + ((tz % 100) * 60)
+ return (user, int(date), -tz)
+
+def export_file(fc):
+ d = fc.data()
+ print "M %s inline %s" % (gitmode(fc.flags()), fc.path())
+ print "data %d" % len(d)
+ print d
+
+def get_filechanges(repo, ctx, parent):
+ modified = set()
+ added = set()
+ removed = set()
+
+ cur = ctx.manifest()
+ prev = repo[parent].manifest().copy()
+
+ for fn in cur:
+ if fn in prev:
+ if (cur.flags(fn) != prev.flags(fn) or cur[fn] != prev[fn]):
+ modified.add(fn)
+ del prev[fn]
+ else:
+ added.add(fn)
+ removed |= set(prev.keys())
+
+ return added | modified, removed
+
+def fixup_user_git(user):
+ name = mail = None
+ user = user.replace('"', '')
+ m = AUTHOR_RE.match(user)
+ if m:
+ name = m.group(1)
+ mail = m.group(2).strip()
+ else:
+ m = NAME_RE.match(user)
+ if m:
+ name = m.group(1).strip()
+ return (name, mail)
+
+def fixup_user_hg(user):
+ def sanitize(name):
+ # stole this from hg-git
+ return re.sub('[<>\n]', '?', name.lstrip('< ').rstrip('> '))
+
+ m = AUTHOR_HG_RE.match(user)
+ if m:
+ name = sanitize(m.group(1))
+ mail = sanitize(m.group(2))
+ ex = m.group(3)
+ if ex:
+ name += ' ext:(' + urllib.quote(ex) + ')'
+ else:
+ name = sanitize(user)
+ if '@' in user:
+ mail = name
+ else:
+ mail = None
+
+ return (name, mail)
+
+def fixup_user(user):
+ global mode, bad_mail
+
+ if mode == 'git':
+ name, mail = fixup_user_git(user)
+ else:
+ name, mail = fixup_user_hg(user)
+
+ if not name:
+ name = bad_name
+ if not mail:
+ mail = bad_mail
+
+ return '%s <%s>' % (name, mail)
+
+def get_repo(url, alias):
+ global dirname, peer
+
+ myui = ui.ui()
+ myui.setconfig('ui', 'interactive', 'off')
+
+ if hg.islocal(url):
+ repo = hg.repository(myui, url)
+ else:
+ local_path = os.path.join(dirname, 'clone')
+ if not os.path.exists(local_path):
+ peer, dstpeer = hg.clone(myui, {}, url, local_path, update=False, pull=True)
+ repo = dstpeer.local()
+ else:
+ repo = hg.repository(myui, local_path)
+ peer = hg.peer(myui, {}, url)
+ repo.pull(peer, heads=None, force=True)
+
+ return repo
+
+def rev_to_mark(rev):
+ global marks
+ return marks.from_rev(rev)
+
+def mark_to_rev(mark):
+ global marks
+ return marks.to_rev(mark)
+
+def export_ref(repo, name, kind, head):
+ global prefix, marks, mode
+
+ ename = '%s/%s' % (kind, name)
+ tip = marks.get_tip(ename)
+
+ # mercurial takes too much time checking this
+ if tip and tip == head.rev():
+ # nothing to do
+ return
+ revs = xrange(tip, head.rev() + 1)
+ count = 0
+
+ revs = [rev for rev in revs if not marks.is_marked(rev)]
+
+ for rev in revs:
+
+ c = repo[rev]
+ (manifest, user, (time, tz), files, desc, extra) = repo.changelog.read(c.node())
+ rev_branch = extra['branch']
+
+ author = "%s %d %s" % (fixup_user(user), time, gittz(tz))
+ if 'committer' in extra:
+ user, time, tz = extra['committer'].rsplit(' ', 2)
+ committer = "%s %s %s" % (user, time, gittz(int(tz)))
+ else:
+ committer = author
+
+ parents = [p for p in repo.changelog.parentrevs(rev) if p >= 0]
+
+ if len(parents) == 0:
+ modified = c.manifest().keys()
+ removed = []
+ else:
+ modified, removed = get_filechanges(repo, c, parents[0])
+
+ if mode == 'hg':
+ extra_msg = ''
+
+ if rev_branch != 'default':
+ extra_msg += 'branch : %s\n' % rev_branch
+
+ renames = []
+ for f in c.files():
+ if f not in c.manifest():
+ continue
+ rename = c.filectx(f).renamed()
+ if rename:
+ renames.append((rename[0], f))
+
+ for e in renames:
+ extra_msg += "rename : %s => %s\n" % e
+
+ for key, value in extra.iteritems():
+ if key in ('author', 'committer', 'encoding', 'message', 'branch', 'hg-git'):
+ continue
+ else:
+ extra_msg += "extra : %s : %s\n" % (key, urllib.quote(value))
+
+ desc += '\n'
+ if extra_msg:
+ desc += '\n--HG--\n' + extra_msg
+
+ if len(parents) == 0 and rev:
+ print 'reset %s/%s' % (prefix, ename)
+
+ print "commit %s/%s" % (prefix, ename)
+ print "mark :%d" % (marks.get_mark(rev))
+ print "author %s" % (author)
+ print "committer %s" % (committer)
+ print "data %d" % (len(desc))
+ print desc
+
+ if len(parents) > 0:
+ print "from :%s" % (rev_to_mark(parents[0]))
+ if len(parents) > 1:
+ print "merge :%s" % (rev_to_mark(parents[1]))
+
+ for f in modified:
+ export_file(c.filectx(f))
+ for f in removed:
+ print "D %s" % (f)
+ print
+
+ count += 1
+ if (count % 100 == 0):
+ print "progress revision %d '%s' (%d/%d)" % (rev, name, count, len(revs))
+ print "#############################################################"
+
+ # make sure the ref is updated
+ print "reset %s/%s" % (prefix, ename)
+ print "from :%u" % rev_to_mark(rev)
+ print
+
+ marks.set_tip(ename, rev)
+
+def export_tag(repo, tag):
+ export_ref(repo, tag, 'tags', repo[tag])
+
+def export_bookmark(repo, bmark):
+ head = bmarks[bmark]
+ export_ref(repo, bmark, 'bookmarks', head)
+
+def export_branch(repo, branch):
+ tip = get_branch_tip(repo, branch)
+ head = repo[tip]
+ export_ref(repo, branch, 'branches', head)
+
+def export_head(repo):
+ global g_head
+ export_ref(repo, g_head[0], 'bookmarks', g_head[1])
+
+def do_capabilities(parser):
+ global prefix, dirname
+
+ print "import"
+ print "export"
+ print "refspec refs/heads/branches/*:%s/branches/*" % prefix
+ print "refspec refs/heads/*:%s/bookmarks/*" % prefix
+ print "refspec refs/tags/*:%s/tags/*" % prefix
+
+ path = os.path.join(dirname, 'marks-git')
+
+ if os.path.exists(path):
+ print "*import-marks %s" % path
+ print "*export-marks %s" % path
+
+ print
+
+def get_branch_tip(repo, branch):
+ global branches
+
+ heads = branches.get(branch, None)
+ if not heads:
+ return None
+
+ # verify there's only one head
+ if (len(heads) > 1):
+ warn("Branch '%s' has more than one head, consider merging" % branch)
+ # older versions of mercurial don't have this
+ if hasattr(repo, "branchtip"):
+ return repo.branchtip(branch)
+
+ return heads[0]
+
+def list_head(repo, cur):
+ global g_head, bmarks
+
+ head = bookmarks.readcurrent(repo)
+ if head:
+ node = repo[head]
+ else:
+ # fake bookmark from current branch
+ head = cur
+ node = repo['.']
+ if not node:
+ node = repo['tip']
+ if not node:
+ return
+ if head == 'default':
+ head = 'master'
+ bmarks[head] = node
+
+ print "@refs/heads/%s HEAD" % head
+ g_head = (head, node)
+
+def do_list(parser):
+ global branches, bmarks, mode, track_branches
+
+ repo = parser.repo
+ for bmark, node in bookmarks.listbookmarks(repo).iteritems():
+ bmarks[bmark] = repo[node]
+
+ cur = repo.dirstate.branch()
+
+ list_head(repo, cur)
+
+ if track_branches:
+ for branch in repo.branchmap():
+ heads = repo.branchheads(branch)
+ if len(heads):
+ branches[branch] = heads
+
+ for branch in branches:
+ print "? refs/heads/branches/%s" % branch
+
+ for bmark in bmarks:
+ print "? refs/heads/%s" % bmark
+
+ for tag, node in repo.tagslist():
+ if tag == 'tip':
+ continue
+ print "? refs/tags/%s" % tag
+
+ print
+
+def do_import(parser):
+ repo = parser.repo
+
+ path = os.path.join(dirname, 'marks-git')
+
+ print "feature done"
+ if os.path.exists(path):
+ print "feature import-marks=%s" % path
+ print "feature export-marks=%s" % path
+ sys.stdout.flush()
+
+ tmp = encoding.encoding
+ encoding.encoding = 'utf-8'
+
+ # lets get all the import lines
+ while parser.check('import'):
+ ref = parser[1]
+
+ if (ref == 'HEAD'):
+ export_head(repo)
+ elif ref.startswith('refs/heads/branches/'):
+ branch = ref[len('refs/heads/branches/'):]
+ export_branch(repo, branch)
+ elif ref.startswith('refs/heads/'):
+ bmark = ref[len('refs/heads/'):]
+ export_bookmark(repo, bmark)
+ elif ref.startswith('refs/tags/'):
+ tag = ref[len('refs/tags/'):]
+ export_tag(repo, tag)
+
+ parser.next()
+
+ encoding.encoding = tmp
+
+ print 'done'
+
+def parse_blob(parser):
+ global blob_marks
+
+ parser.next()
+ mark = parser.get_mark()
+ parser.next()
+ data = parser.get_data()
+ blob_marks[mark] = data
+ parser.next()
+ return
+
+def get_merge_files(repo, p1, p2, files):
+ for e in repo[p1].files():
+ if e not in files:
+ if e not in repo[p1].manifest():
+ continue
+ f = { 'ctx' : repo[p1][e] }
+ files[e] = f
+
+def parse_commit(parser):
+ global marks, blob_marks, bmarks, parsed_refs
+ global mode
+
+ from_mark = merge_mark = None
+
+ ref = parser[1]
+ parser.next()
+
+ commit_mark = parser.get_mark()
+ parser.next()
+ author = parser.get_author()
+ parser.next()
+ committer = parser.get_author()
+ parser.next()
+ data = parser.get_data()
+ parser.next()
+ if parser.check('from'):
+ from_mark = parser.get_mark()
+ parser.next()
+ if parser.check('merge'):
+ merge_mark = parser.get_mark()
+ parser.next()
+ if parser.check('merge'):
+ die('octopus merges are not supported yet')
+
+ files = {}
+
+ for line in parser:
+ if parser.check('M'):
+ t, m, mark_ref, path = line.split(' ', 3)
+ mark = int(mark_ref[1:])
+ f = { 'mode' : hgmode(m), 'data' : blob_marks[mark] }
+ elif parser.check('D'):
+ t, path = line.split(' ')
+ f = { 'deleted' : True }
+ else:
+ die('Unknown file command: %s' % line)
+ files[path] = f
+
+ def getfilectx(repo, memctx, f):
+ of = files[f]
+ if 'deleted' in of:
+ raise IOError
+ if 'ctx' in of:
+ return of['ctx']
+ is_exec = of['mode'] == 'x'
+ is_link = of['mode'] == 'l'
+ rename = of.get('rename', None)
+ return context.memfilectx(f, of['data'],
+ is_link, is_exec, rename)
+
+ repo = parser.repo
+
+ user, date, tz = author
+ extra = {}
+
+ if committer != author:
+ extra['committer'] = "%s %u %u" % committer
+
+ if from_mark:
+ p1 = repo.changelog.node(mark_to_rev(from_mark))
+ else:
+ p1 = '\0' * 20
+
+ if merge_mark:
+ p2 = repo.changelog.node(mark_to_rev(merge_mark))
+ else:
+ p2 = '\0' * 20
+
+ #
+ # If files changed from any of the parents, hg wants to know, but in git if
+ # nothing changed from the first parent, nothing changed.
+ #
+ if merge_mark:
+ get_merge_files(repo, p1, p2, files)
+
+ if mode == 'hg':
+ i = data.find('\n--HG--\n')
+ if i >= 0:
+ tmp = data[i + len('\n--HG--\n'):].strip()
+ for k, v in [e.split(' : ') for e in tmp.split('\n')]:
+ if k == 'rename':
+ old, new = v.split(' => ', 1)
+ files[new]['rename'] = old
+ elif k == 'branch':
+ extra[k] = v
+ elif k == 'extra':
+ ek, ev = v.split(' : ', 1)
+ extra[ek] = urllib.unquote(ev)
+ data = data[:i]
+
+ ctx = context.memctx(repo, (p1, p2), data,
+ files.keys(), getfilectx,
+ user, (date, tz), extra)
+
+ tmp = encoding.encoding
+ encoding.encoding = 'utf-8'
+
+ node = repo.commitctx(ctx)
+
+ encoding.encoding = tmp
+
+ rev = repo[node].rev()
+
+ parsed_refs[ref] = node
+
+ marks.new_mark(rev, commit_mark)
+
+def parse_reset(parser):
+ ref = parser[1]
+ parser.next()
+ # ugh
+ if parser.check('commit'):
+ parse_commit(parser)
+ return
+ if not parser.check('from'):
+ return
+ from_mark = parser.get_mark()
+ parser.next()
+
+ node = parser.repo.changelog.node(mark_to_rev(from_mark))
+ parsed_refs[ref] = node
+
+def parse_tag(parser):
+ name = parser[1]
+ parser.next()
+ from_mark = parser.get_mark()
+ parser.next()
+ tagger = parser.get_author()
+ parser.next()
+ data = parser.get_data()
+ parser.next()
+
+ # nothing to do
+
+def do_export(parser):
+ global parsed_refs, bmarks, peer
+
+ parser.next()
+
+ for line in parser.each_block('done'):
+ if parser.check('blob'):
+ parse_blob(parser)
+ elif parser.check('commit'):
+ parse_commit(parser)
+ elif parser.check('reset'):
+ parse_reset(parser)
+ elif parser.check('tag'):
+ parse_tag(parser)
+ elif parser.check('feature'):
+ pass
+ else:
+ die('unhandled export command: %s' % line)
+
+ for ref, node in parsed_refs.iteritems():
+ if ref.startswith('refs/heads/branches'):
+ pass
+ elif ref.startswith('refs/heads/'):
+ bmark = ref[len('refs/heads/'):]
+ if bmark in bmarks:
+ old = bmarks[bmark].hex()
+ else:
+ old = ''
+ if not bookmarks.pushbookmark(parser.repo, bmark, old, node):
+ continue
+ elif ref.startswith('refs/tags/'):
+ tag = ref[len('refs/tags/'):]
+ parser.repo.tag([tag], node, None, True, None, {})
+ else:
+ # transport-helper/fast-export bugs
+ continue
+ print "ok %s" % ref
+
+ print
+
+ if peer:
+ parser.repo.push(peer, force=False)
+
+def main(args):
+ global prefix, dirname, branches, bmarks
+ global marks, blob_marks, parsed_refs
+ global peer, mode, bad_mail, bad_name
+ global track_branches
+
+ alias = args[1]
+ url = args[2]
+ peer = None
+
+ hg_git_compat = False
+ track_branches = True
+ try:
+ if get_config('remote-hg.hg-git-compat') == 'true\n':
+ hg_git_compat = True
+ track_branches = False
+ if get_config('remote-hg.track-branches') == 'false\n':
+ track_branches = False
+ except subprocess.CalledProcessError:
+ pass
+
+ if hg_git_compat:
+ mode = 'hg'
+ bad_mail = 'none@none'
+ bad_name = ''
+ else:
+ mode = 'git'
+ bad_mail = 'unknown'
+ bad_name = 'Unknown'
+
+ if alias[4:] == url:
+ is_tmp = True
+ alias = util.sha1(alias).hexdigest()
+ else:
+ is_tmp = False
+
+ gitdir = os.environ['GIT_DIR']
+ dirname = os.path.join(gitdir, 'hg', alias)
+ branches = {}
+ bmarks = {}
+ blob_marks = {}
+ parsed_refs = {}
+
+ repo = get_repo(url, alias)
+ prefix = 'refs/hg/%s' % alias
+
+ if not os.path.exists(dirname):
+ os.makedirs(dirname)
+
+ marks_path = os.path.join(dirname, 'marks-hg')
+ marks = Marks(marks_path)
+
+ parser = Parser(repo)
+ for line in parser:
+ if parser.check('capabilities'):
+ do_capabilities(parser)
+ elif parser.check('list'):
+ do_list(parser)
+ elif parser.check('import'):
+ do_import(parser)
+ elif parser.check('export'):
+ do_export(parser)
+ else:
+ die('unhandled command: %s' % line)
+ sys.stdout.flush()
+
+ if not is_tmp:
+ marks.store()
+ else:
+ shutil.rmtree(dirname)
+
+sys.exit(main(sys.argv))