# Mercurial extension to provide the 'hg bookmark' command
#
# Copyright 2008 David Soria Parra <dsp@php.net>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
'''mercurial bookmarks
Mercurial bookmarks are local moveable pointers to changesets. Every
bookmark points to a changeset identified by its hash. If you commit a
changeset that is based on a changeset that has a bookmark on it, the
bookmark is forwarded to the new changeset.
It is possible to use bookmark names in every revision lookup (e.g. hg
merge, hg update).
'''
from mercurial.commands import templateopts, hex, short
from mercurial.i18n import _
from mercurial import cmdutil, util, commands, changelog
from mercurial.node import nullid, nullrev
from mercurial.repo import RepoError
import mercurial, mercurial.localrepo, mercurial.repair, os
def parse(repo):
'''Parse .hg/bookmarks file and return a dictionary
Bookmarks are stored as {HASH}\s{NAME}\n (localtags format) values
in the .hg/bookmarks file. They are read by the parse() method and
returned as a dictionary with name => hash values.
The parsed dictionary is cached until a write() operation is done.
'''
try:
if repo._bookmarks:
return repo._bookmarks
repo._bookmarks = {}
for line in repo.opener('bookmarks'):
sha, refspec = line.strip().split(' ', 1)
repo._bookmarks[refspec] = repo.lookup(sha)
except:
pass
return repo._bookmarks
def write(repo, refs):
'''Write bookmarks
Write the given bookmark => hash dictionary to the .hg/bookmarks file
in a format equal to those of localtags.
We also store a backup of the previous state in undo.bookmarks that
can be copied back on rollback.
'''
if os.path.exists(repo.join('bookmarks')):
util.copyfile(repo.join('bookmarks'), repo.join('undo.bookmarks'))
file = repo.opener('bookmarks', 'w+')
for refspec, node in refs.items():
file.write("%s %s\n" % (hex(node), refspec))
file.close()
def bookmark(ui, repo, mark=None, rev=None, force=False, delete=False, rename=None):
'''mercurial bookmarks
Bookmarks are pointers to certain commits that move when
commiting. Bookmarks are local. They can be renamed, copied and
deleted. It is possible to use bookmark names in 'hg merge' and 'hg
update' to update to a given bookmark.
You can use 'hg bookmark NAME' to set a bookmark on the current
tip with the given name. If you specify a revision using -r REV
(where REV may be an existing bookmark), the bookmark is set to
that revision.
'''
hexfn = ui.debugflag and hex or short
marks = parse(repo)
cur = repo.changectx('.').node()
if rename:
if rename not in marks:
raise util.Abort(_("a bookmark of this name does not exist"))
if mark in marks and not force:
raise util.Abort(_("a bookmark of the same name already exists"))
if mark is None:
raise util.Abort(_("new bookmark name required"))
marks[mark] = marks[rename]
del marks[rename]
write(repo, marks)
return
if delete:
if mark == None:
raise util.Abort(_("bookmark name required"))
if mark not in marks:
raise util.Abort(_("a bookmark of this name does not exist"))
del marks[mark]
write(repo, marks)
return
if mark != None:
if mark.strip().count("\n") > 0:
raise Exception("bookmark cannot contain newlines")
if mark in marks and not force:
raise util.Abort(_("a bookmark of the same name already exists"))
if ((mark in repo.branchtags() or mark == repo.dirstate.branch())
and not force):
raise util.Abort(
_("a bookmark cannot have the name of an existing branch"))
if rev:
marks[mark] = repo.lookup(rev)
else:
marks[mark] = repo.changectx('.').node()
write(repo, marks)
return
if mark == None:
if len(marks) == 0:
ui.status("no bookmarks set\n")
else:
for bmark, n in marks.iteritems():
prefix = (n == cur) and '*' or ' '
ui.write(" %s %-25s %d:%s\n" % (
prefix, bmark, repo.changelog.rev(n), hexfn(n)))
return
def _revstostrip(changelog, node):
srev = changelog.rev(node)
tostrip = [srev]
saveheads = []
for r in xrange(srev, changelog.rev(changelog.tip()) + 1):
parents = changelog.parentrevs(r)
if parents[0] in tostrip or parents[1] in tostrip:
tostrip.append(r)
if parents[1] != nullrev:
for p in parents:
if p not in tostrip and p > striprev:
saveheads.append(p)
return [r for r in tostrip if r not in saveheads]
def strip(ui, repo, node, backup="all"):
"""Strip bookmarks if revisions are stripped using
the mercurial.strip method. This usually happens during
qpush and qpop"""
revisions = _revstostrip(repo.changelog, node)
marks = parse(repo)
update = []
for mark, n in marks.items():
if repo.changelog.rev(n) in revisions:
update.append(mark)
result = oldstrip(ui, repo, node, backup)
if len(update) > 0:
for m in update:
marks[m] = repo.changectx('.').node()
write(repo, marks)
oldstrip = mercurial.repair.strip
mercurial.repair.strip = strip
def reposetup(ui, repo):
if not isinstance(repo, mercurial.localrepo.localrepository):
return
# init a bookmark cache as otherwise we would get a infinite reading
# in lookup()
repo._bookmarks = None
class bookmark_repo(repo.__class__):
def rollback(self):
if os.path.exists(self.join('undo.bookmarks')):
util.rename(self.join('undo.bookmarks'), self.join('bookmarks'))
return super(bookmark_repo, self).rollback()
def lookup(self, key):
if self._bookmarks is None:
self._bookmarks = parse(self)
if key in self._bookmarks:
key = self._bookmarks[key]
return super(bookmark_repo, self).lookup(key)
def commit(self, *k, **kw):
"""Add a revision to the repository and
move the bookmark"""
node = super(bookmark_repo, self).commit(*k, **kw)
parents = repo.changelog.parents(node)
if parents[1] == nullid:
parents = (parents[0],)
marks = parse(repo)
update = False
for mark, n in marks.items():
if n in parents:
marks[mark] = node
update = True
if update:
write(repo, marks)
return node
def addchangegroup(self, source, srctype, url, emptyok=False):
try:
onode = repo.changectx('.').node()
except RepoError, inst:
pass
result = super(bookmark_repo, self).addchangegroup(
source, srctype, url, emptyok)
if result > 1:
# We have more heads than before
return result
node = repo.changelog.tip()
marks = parse(repo)
update = False
for mark, n in marks.items():
if n == onode:
marks[mark] = node
update = True
if update:
write(repo, marks)
return result
repo.__class__ = bookmark_repo
cmdtable = {
"bookmarks":
(bookmark,
[('f', 'force', False, _('force')),
('r', 'rev', '', _('revision')),
('d', 'delete', False, _('delete a given bookmark')),
('m', 'rename', '', _('rename a given bookmark'))],
_('hg bookmarks [-d] [-m NAME] [-r NAME] [NAME]')),
}