bookmarks: move parse() and current() into property definitions

hgext/bookmarks.py

@@ -1,335 +1,327 b''
 # Mercurial extension to provide the 'hg bookmark' command
 #
 # Copyright 2008 David Soria Parra <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2, incorporated herein by reference.
 
 '''track a line of development with movable markers
 
 Bookmarks are local movable markers 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 shifts to the new changeset.
 
 It is possible to use bookmark names in every revision lookup (e.g. hg
 merge, hg update).
 
 By default, when several bookmarks point to the same changeset, they
 will all move forward together. It is possible to obtain a more
 git-like experience by adding the following configuration option to
 your .hgrc::
 
   [bookmarks]
   track.current = True
 
 This will cause Mercurial to track the bookmark that you are currently
 using, and only update it. This is similar to git's approach to
 branching.
 '''
 
 from mercurial.i18n import _
 from mercurial.node import nullid, nullrev, hex, short
 from mercurial import util, commands, localrepo, repair, extensions
 import 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:
-        bookmarks = {}
-        for line in repo.opener('bookmarks'):
-            sha, refspec = line.strip().split(' ', 1)
-            bookmarks[refspec] = repo.lookup(sha)
-    except:
-        pass
-    return bookmarks
-
 def write(repo):
     '''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.
     '''
     refs = repo._bookmarks
     if os.path.exists(repo.join('bookmarks')):
         util.copyfile(repo.join('bookmarks'), repo.join('undo.bookmarks'))
     if repo._bookmarkcurrent not in refs:
         setcurrent(repo, None)
     wlock = repo.wlock()
     try:
         file = repo.opener('bookmarks', 'w', atomictemp=True)
         for refspec, node in refs.iteritems():
             file.write("%s %s\n" % (hex(node), refspec))
         file.rename()
     finally:
         wlock.release()
 
-def current(repo):
-    '''Get the current bookmark
-
-    If we use gittishsh branches we have a current bookmark that
-    we are on. This function returns the name of the bookmark. It
-    is stored in .hg/bookmarks.current
-    '''
-    mark = None
-    if os.path.exists(repo.join('bookmarks.current')):
-        file = repo.opener('bookmarks.current')
-        # No readline() in posixfile_nt, reading everything is cheap
-        mark = (file.readlines() or [''])[0]
-        if mark == '':
-            mark = None
-        file.close()
-    return mark
-
 def setcurrent(repo, mark):
     '''Set the name of the bookmark that we are currently on
 
     Set the name of the bookmark that we are on (hg update <bookmark>).
     The name is recorded in .hg/bookmarks.current
     '''
     current = repo._bookmarkcurrent
     if current == mark:
         return
 
     refs = repo._bookmarks
 
     # do not update if we do update to a rev equal to the current bookmark
     if (mark and mark not in refs and
         current and refs[current] == repo.changectx('.').node()):
         return
     if mark not in refs:
         mark = ''
     wlock = repo.wlock()
     try:
         file = repo.opener('bookmarks.current', 'w', atomictemp=True)
         file.write(mark)
         file.rename()
     finally:
         wlock.release()
     repo._bookmarkcurrent = mark
 
 def bookmark(ui, repo, mark=None, rev=None, force=False, delete=False, rename=None):
     '''track a line of development with movable markers
 
     Bookmarks are pointers to certain commits that move when
     committing. Bookmarks are local. They can be renamed, copied and
     deleted. It is possible to use bookmark names in 'hg merge' and
     'hg update' to merge and update respectively to a given bookmark.
 
     You can use 'hg bookmark NAME' to set a bookmark on the working
     directory's parent revision with the given name. If you specify
     a revision using -r REV (where REV may be an existing bookmark),
     the bookmark is assigned to that revision.
     '''
     hexfn = ui.debugflag and hex or short
     marks = repo._bookmarks
     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]
         if repo._bookmarkcurrent == rename:
             setcurrent(repo, mark)
         write(repo)
         return
 
     if delete:
         if mark is None:
             raise util.Abort(_("bookmark name required"))
         if mark not in marks:
             raise util.Abort(_("a bookmark of this name does not exist"))
         if mark == repo._bookmarkcurrent:
             setcurrent(repo, None)
         del marks[mark]
         write(repo)
         return
 
     if mark != None:
         if "\n" in mark:
             raise util.Abort(_("bookmark name cannot contain newlines"))
         mark = mark.strip()
         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()
             setcurrent(repo, mark)
         write(repo)
         return
 
     if mark is None:
         if rev:
             raise util.Abort(_("bookmark name required"))
         if len(marks) == 0:
             ui.status("no bookmarks set\n")
         else:
             for bmark, n in marks.iteritems():
                 if ui.configbool('bookmarks', 'track.current'):
                     current = repo._bookmarkcurrent
                     prefix = (bmark == current and n == cur) and '*' or ' '
                 else:
                     prefix = (n == cur) and '*' or ' '
 
                 if ui.quiet:
                     ui.write("%s\n" % bmark)
                 else:
                     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, len(changelog)):
         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 > srev:
                         saveheads.append(p)
     return [r for r in tostrip if r not in saveheads]
 
 def strip(oldstrip, 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 = repo._bookmarks
     update = []
     for mark, n in marks.iteritems():
         if repo.changelog.rev(n) in revisions:
             update.append(mark)
     oldstrip(ui, repo, node, backup)
     if len(update) > 0:
         for m in update:
             marks[m] = repo.changectx('.').node()
         write(repo)
 
 def reposetup(ui, repo):
     if not repo.local():
         return
 
     class bookmark_repo(repo.__class__):
 
         @util.propertycache
         def _bookmarks(self):
-            return parse(self)
+            '''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 returned as a dictionary
+            with name => hash values.
+            '''
+            try:
+                bookmarks = {}
+                for line in self.opener('bookmarks'):
+                    sha, refspec = line.strip().split(' ', 1)
+                    bookmarks[refspec] = super(bookmark_repo, self).lookup(sha)
+            except:
+                pass
+            return bookmarks
 
         @util.propertycache
         def _bookmarkcurrent(self):
-            return current(self)
+            '''Get the current bookmark
+
+            If we use gittishsh branches we have a current bookmark that
+            we are on. This function returns the name of the bookmark. It
+            is stored in .hg/bookmarks.current
+            '''
+            mark = None
+            if os.path.exists(self.join('bookmarks.current')):
+                file = self.opener('bookmarks.current')
+                # No readline() in posixfile_nt, reading everything is cheap
+                mark = (file.readlines() or [''])[0]
+                if mark == '':
+                    mark = None
+                file.close()
+            return mark
 
         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 key in self._bookmarks:
                 key = self._bookmarks[key]
             return super(bookmark_repo, self).lookup(key)
 
         def _bookmarksupdate(self, parents, node):
             marks = self._bookmarks
             update = False
             if ui.configbool('bookmarks', 'track.current'):
                 mark = self._bookmarkcurrent
                 if mark and marks[mark] in parents:
                     marks[mark] = node
                     update = True
             else:
                 for mark, n in marks.items():
                     if n in parents:
                         marks[mark] = node
                         update = True
             if update:
                 write(self)
 
         def commitctx(self, ctx, error=False):
             """Add a revision to the repository and
             move the bookmark"""
             wlock = self.wlock() # do both commit and bookmark with lock held
             try:
                 node  = super(bookmark_repo, self).commitctx(ctx, error)
                 if node is None:
                     return None
                 parents = self.changelog.parents(node)
                 if parents[1] == nullid:
                     parents = (parents[0],)
 
                 self._bookmarksupdate(parents, node)
                 return node
             finally:
                 wlock.release()
 
         def addchangegroup(self, source, srctype, url, emptyok=False):
             parents = self.dirstate.parents()
 
             result = super(bookmark_repo, self).addchangegroup(
                 source, srctype, url, emptyok)
             if result > 1:
                 # We have more heads than before
                 return result
             node = self.changelog.tip()
 
             self._bookmarksupdate(parents, node)
             return result
 
         def _findtags(self):
             """Merge bookmarks with normal tags"""
             (tags, tagtypes) = super(bookmark_repo, self)._findtags()
             tags.update(self._bookmarks)
             return (tags, tagtypes)
 
     repo.__class__ = bookmark_repo
 
 def uisetup(ui):
     extensions.wrapfunction(repair, "strip", strip)
     if ui.configbool('bookmarks', 'track.current'):
         extensions.wrapcommand(commands.table, 'update', updatecurbookmark)
 
 def updatecurbookmark(orig, ui, repo, *args, **opts):
     '''Set the current bookmark
 
     If the user updates to a bookmark we update the .hg/bookmarks.current
     file.
     '''
     res = orig(ui, repo, *args, **opts)
     rev = opts['rev']
     if not rev and len(args) > 0:
         rev = args[0]
     setcurrent(repo, rev)
     return res
 
 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 [-f] [-d] [-m NAME] [-r REV] [NAME]')),
 }