Signed-off-by: Felipe Contreras <felipe.contreras@xxxxxxxxx>
---
contrib/remote-helpers/git-remote-bzr | 353 ++++++++++++++++++++++++++++++++++
1 file changed, 353 insertions(+)
create mode 100755 contrib/remote-helpers/git-remote-bzr
diff --git a/contrib/remote-helpers/git-remote-bzr b/contrib/remote-helpers/git-remote-bzr
new file mode 100755
index 0000000..ed893b0
--- /dev/null
+++ b/contrib/remote-helpers/git-remote-bzr
@@ -0,0 +1,353 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2012 Felipe Contreras
+#
+
+#
+# Just copy to your ~/bin, or anywhere in your $PATH.
+# Then you can clone with:
+# % git clone bzr::/path/to/bzr/repo/or/url
+#
+# For example:
+# % git clone bzr::$HOME/myrepo
+# or
+# % git clone bzr::lp:myrepo
+#
+
+import sys
+
+import bzrlib
+bzrlib.initialize()
+
+import bzrlib.plugin
+bzrlib.plugin.load_plugins()
+
+import sys
+import os
+import json
+import re
+
+NAME_RE = re.compile('^([^<>]+)')
+AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
+
+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 gittz(tz):
+ return '%+03d%02d' % (tz / 3600, tz % 3600 / 60)
+
+class Marks:
+
+ def __init__(self, path):
+ self.path = path
+ self.tips = {}
+ self.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']
+
+ 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[rev]
+
+ def next_mark(self):
+ self.last_mark += 1
+ return self.last_mark
+
+ def get_mark(self, rev):
+ self.last_mark += 1
+ self.marks[rev] = self.last_mark
+ return self.last_mark
+
+ def is_marked(self, rev):
+ return self.marks.has_key(rev)
+
+ def get_tip(self, branch):
+ return self.tips.get(branch, None)
+
+ 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 rev_to_mark(rev):
+ global marks
+ return marks.from_rev(rev)
+
+def fixup_user(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 '%s <%s>' % (name, mail)
+
+def get_filechanges(cur, prev):
+ modified = {}
+ removed = {}
+
+ changes = cur.changes_from(prev)
+
+ for path, fid, kind in changes.added:
+ modified[path] = fid
+ for path, fid, kind in changes.removed:
+ removed[path] = None
+ for path, fid, kind, mod, _ in changes.modified:
+ modified[path] = fid
+ for oldpath, newpath, fid, kind, mod, _ in changes.renamed:
+ removed[oldpath] = None
+ modified[newpath] = fid
+
+ return modified, removed
+
+def export_file(path, d):
+ print "M %s inline %s" % ('100644', path)
+ print "data %d" % len(d)
+ print d
+
+def export_files(tree, files):
+ global marks, filenodes
+
+ final = []
+ for path, fid in files.iteritems():
+ h = tree.get_file_sha1(fid)
+ d = tree.get_file_text(fid)
+
+ if h in filenodes:
+ mark = filenodes[h]
+ else:
+ mark = marks.next_mark()
+ filenodes[h] = mark
+
+ print "blob"
+ print "mark :%u" % mark
+ print "data %d" % len(d)
+ print d
+
+ final.append(('100644', mark, path))
+
+ return final
+
+def export_branch(branch, name):
+ global prefix, dirname
+
+ ref = '%s/heads/%s' % (prefix, name)
+ tip = marks.get_tip(name)
+
+ repo = branch.repository
+ repo.lock_read()
+ revs = branch.iter_merge_sorted_revisions(None, tip, 'exclude', 'forward')
+ count = 0
+
+ revs = [revid for revid, _, _, _ in revs if not marks.is_marked(revid)]
+
+ for revid in revs:
+
+ rev = repo.get_revision(revid)
+
+ parents = rev.parent_ids
+ time = rev.timestamp
+ tz = rev.timezone
+ committer = rev.committer.encode('utf-8')
+ committer = "%s %u %s" % (fixup_user(committer), time, gittz(tz))
+ author = committer
+ msg = rev.message.encode('utf-8')
+
+ msg += '\n'
+
+ if len(parents) == 0:
+ parent = bzrlib.revision.NULL_REVISION
+ else:
+ parent = parents[0]
+
+ cur_tree = repo.revision_tree(revid)
+ prev = repo.revision_tree(parent)
+ modified, removed = get_filechanges(cur_tree, prev)
+
+ modified_final = export_files(cur_tree, modified)
+
+ if len(parents) == 0:
+ print 'reset %s' % ref
+
+ print "commit %s" % ref
+ print "mark :%d" % (marks.get_mark(revid))
+ print "author %s" % (author)
+ print "committer %s" % (committer)
+ print "data %d" % (len(msg))
+ print msg
+
+ for i, p in enumerate(parents):
+ try:
+ m = rev_to_mark(p)
+ except KeyError:
+ # ghost?
+ continue
+ if i == 0:
+ print "from :%s" % m
+ else:
+ print "merge :%s" % m
+
+ for f in modified_final:
+ print "M %s :%u %s" % f
+ for f in removed:
+ print "D %s" % (f)
+ print
+
+ count += 1
+ if (count % 100 == 0):
+ print "progress revision %s (%d/%d)" % (revid, count, len(revs))
+ print "#############################################################"
+
+ repo.unlock()
+
+ revid = branch.last_revision()
+
+ # make sure the ref is updated
+ print "reset %s" % ref
+ print "from :%u" % rev_to_mark(revid)
+ print
+
+ marks.set_tip(name, revid)
+
+def export_tag(repo, name):
+ global tags
+ try:
+ print "reset refs/tags/%s" % name
+ print "from :%u" % rev_to_mark(tags[name])
+ print
+ except KeyError:
+ warn("TODO: fetch tag '%s'" % name)
+
+def do_import(parser):
+ global dirname
+
+ branch = 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()
+
+ while parser.check('import'):
+ ref = parser[1]
+ if ref.startswith('refs/heads/'):
+ name = ref[len('refs/heads/'):]
+ export_branch(branch, name)
+ if ref.startswith('refs/tags/'):
+ name = ref[len('refs/tags/'):]
+ export_tag(branch, name)
+ parser.next()
+
+ print 'done'
+
+ sys.stdout.flush()
+
+def do_capabilities(parser):
+ print "import"
+ print "refspec refs/heads/*:%s/heads/*" % prefix
+ print
+
+def do_list(parser):
+ global tags
+ print "? refs/heads/%s" % 'master'
+ for tag, revid in parser.repo.tags.get_tag_dict().items():
+ print "? refs/tags/%s" % tag
+ tags[tag] = revid
+ print "@refs/heads/%s HEAD" % 'master'
+ print
+
+def get_repo(url, alias):
+ origin = bzrlib.controldir.ControlDir.open(url)
+ return origin.open_branch()
+
+def main(args):
+ global marks, prefix, dirname
+ global tags, filenodes
+
+ alias = args[1]
+ url = args[2]
+
+ prefix = 'refs/bzr/%s' % alias
+ tags = {}
+ filenodes = {}
+
+ gitdir = os.environ['GIT_DIR']
+ dirname = os.path.join(gitdir, 'bzr', alias)
+
+ if not os.path.exists(dirname):
+ os.makedirs(dirname)
+
+ repo = get_repo(url, alias)
+
+ marks_path = os.path.join(dirname, 'marks-int')
+ 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)
+ else:
+ die('unhandled command: %s' % line)
+ sys.stdout.flush()
+
+ marks.store()
+
+sys.exit(main(sys.argv))
--
1.8.0
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