diff options
Diffstat (limited to 'contrib/remote-helpers/git-remote-bzr')
| -rwxr-xr-x | contrib/remote-helpers/git-remote-bzr | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/contrib/remote-helpers/git-remote-bzr b/contrib/remote-helpers/git-remote-bzr new file mode 100755 index 0000000000..b6be9d6cde --- /dev/null +++ b/contrib/remote-helpers/git-remote-bzr @@ -0,0 +1,352 @@ +#!/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_files(tree, files): + global marks, filenodes + + final = [] + for path, fid in files.iteritems(): + h = tree.get_file_sha1(fid) + + mode = '100644' + + # is the blob already exported? + if h in filenodes: + mark = filenodes[h] + else: + d = tree.get_file_text(fid) + + mark = marks.next_mark() + filenodes[h] = mark + + print "blob" + print "mark :%u" % mark + print "data %d" % len(d) + print d + + final.append((mode, 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)) |