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