bookmarks: reuse @number bookmark, if it refers changeset referred remotely

Before this patch, "@number" suffixed bookmark may be newly created at
each "hg pull" from the remote repository, if the bookmark in remote
repository diverges from one in local one.

This causes unexpected increase of "@number" suffixed bookmarks.

This patch reuses "@number" suffixed bookmark, if it refers the
changeset which is referred by the same bookmark in the remote
repository.

mercurial/bookmarks.py

@@ -1,474 +1,478 b''
 # Mercurial bookmark support code
 #
 # 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 or any later version.
 
 import os
 from mercurial.i18n import _
 from mercurial.node import hex, bin
 from mercurial import encoding, error, util, obsolete, lock as lockmod
 import errno
 
 class bmstore(dict):
     """Storage for bookmarks.
 
     This object should do all bookmark reads and writes, so that it's
     fairly simple to replace the storage underlying bookmarks without
     having to clone the logic surrounding bookmarks.
 
     This particular bmstore implementation stores bookmarks as
     {hash}\s{name}\n (the same format as localtags) in
     .hg/bookmarks. The mapping is stored as {name: nodeid}.
 
     This class does NOT handle the "current" bookmark state at this
     time.
     """
 
     def __init__(self, repo):
         dict.__init__(self)
         self._repo = repo
         try:
             bkfile = self.getbkfile(repo)
             for line in bkfile:
                 line = line.strip()
                 if not line:
                     continue
                 if ' ' not in line:
                     repo.ui.warn(_('malformed line in .hg/bookmarks: %r\n')
                                  % line)
                     continue
                 sha, refspec = line.split(' ', 1)
                 refspec = encoding.tolocal(refspec)
                 try:
                     self[refspec] = repo.changelog.lookup(sha)
                 except LookupError:
                     pass
         except IOError, inst:
             if inst.errno != errno.ENOENT:
                 raise
 
     def getbkfile(self, repo):
         bkfile = None
         if 'HG_PENDING' in os.environ:
             try:
                 bkfile = repo.vfs('bookmarks.pending')
             except IOError, inst:
                 if inst.errno != errno.ENOENT:
                     raise
         if bkfile is None:
             bkfile = repo.vfs('bookmarks')
         return bkfile
 
     def recordchange(self, tr):
         """record that bookmarks have been changed in a transaction
 
         The transaction is then responsible for updating the file content."""
         tr.addfilegenerator('bookmarks', ('bookmarks',), self._write,
                             location='plain')
         tr.hookargs['bookmark_moved'] = '1'
 
     def write(self):
         '''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.
         '''
         repo = self._repo
         self._writerepo(repo)
 
     def _writerepo(self, repo):
         """Factored out for extensibility"""
         if repo._bookmarkcurrent not in self:
             unsetcurrent(repo)
 
         wlock = repo.wlock()
         try:
 
             file = repo.vfs('bookmarks', 'w', atomictemp=True)
             self._write(file)
             file.close()
 
             # touch 00changelog.i so hgweb reloads bookmarks (no lock needed)
             try:
                 repo.svfs.utime('00changelog.i', None)
             except OSError:
                 pass
 
         finally:
             wlock.release()
 
     def _write(self, fp):
         for name, node in self.iteritems():
             fp.write("%s %s\n" % (hex(node), encoding.fromlocal(name)))
 
 def readcurrent(repo):
     '''Get the current bookmark
 
     If we use gittish 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
     try:
         file = repo.vfs('bookmarks.current')
     except IOError, inst:
         if inst.errno != errno.ENOENT:
             raise
         return None
     try:
         # No readline() in osutil.posixfile, reading everything is cheap
         mark = encoding.tolocal((file.readlines() or [''])[0])
         if mark == '' or mark not in repo._bookmarks:
             mark = None
     finally:
         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
     '''
     if mark not in repo._bookmarks:
         raise AssertionError('bookmark %s does not exist!' % mark)
 
     current = repo._bookmarkcurrent
     if current == mark:
         return
 
     wlock = repo.wlock()
     try:
         file = repo.vfs('bookmarks.current', 'w', atomictemp=True)
         file.write(encoding.fromlocal(mark))
         file.close()
     finally:
         wlock.release()
     repo._bookmarkcurrent = mark
 
 def unsetcurrent(repo):
     wlock = repo.wlock()
     try:
         try:
             repo.vfs.unlink('bookmarks.current')
             repo._bookmarkcurrent = None
         except OSError, inst:
             if inst.errno != errno.ENOENT:
                 raise
     finally:
         wlock.release()
 
 def iscurrent(repo, mark=None, parents=None):
     '''Tell whether the current bookmark is also active
 
     I.e., the bookmark listed in .hg/bookmarks.current also points to a
     parent of the working directory.
     '''
     if not mark:
         mark = repo._bookmarkcurrent
     if not parents:
         parents = [p.node() for p in repo[None].parents()]
     marks = repo._bookmarks
     return (mark in marks and marks[mark] in parents)
 
 def updatecurrentbookmark(repo, oldnode, curbranch):
     try:
         return update(repo, oldnode, repo.branchtip(curbranch))
     except error.RepoLookupError:
         if curbranch == "default": # no default branch!
             return update(repo, oldnode, repo.lookup("tip"))
         else:
             raise util.Abort(_("branch %s not found") % curbranch)
 
 def deletedivergent(repo, deletefrom, bm):
     '''Delete divergent versions of bm on nodes in deletefrom.
 
     Return True if at least one bookmark was deleted, False otherwise.'''
     deleted = False
     marks = repo._bookmarks
     divergent = [b for b in marks if b.split('@', 1)[0] == bm.split('@', 1)[0]]
     for mark in divergent:
         if mark == '@' or '@' not in mark:
             # can't be divergent by definition
             continue
         if mark and marks[mark] in deletefrom:
             if mark != bm:
                 del marks[mark]
                 deleted = True
     return deleted
 
 def calculateupdate(ui, repo, checkout):
     '''Return a tuple (targetrev, movemarkfrom) indicating the rev to
     check out and where to move the active bookmark from, if needed.'''
     movemarkfrom = None
     if checkout is None:
         curmark = repo._bookmarkcurrent
         if iscurrent(repo):
             movemarkfrom = repo['.'].node()
         elif curmark:
             ui.status(_("updating to active bookmark %s\n") % curmark)
             checkout = curmark
     return (checkout, movemarkfrom)
 
 def update(repo, parents, node):
     deletefrom = parents
     marks = repo._bookmarks
     update = False
     cur = repo._bookmarkcurrent
     if not cur:
         return False
 
     if marks[cur] in parents:
         new = repo[node]
         divs = [repo[b] for b in marks
                 if b.split('@', 1)[0] == cur.split('@', 1)[0]]
         anc = repo.changelog.ancestors([new.rev()])
         deletefrom = [b.node() for b in divs if b.rev() in anc or b == new]
         if validdest(repo, repo[marks[cur]], new):
             marks[cur] = new.node()
             update = True
 
     if deletedivergent(repo, deletefrom, cur):
         update = True
 
     if update:
         marks.write()
     return update
 
 def listbookmarks(repo):
     # We may try to list bookmarks on a repo type that does not
     # support it (e.g., statichttprepository).
     marks = getattr(repo, '_bookmarks', {})
 
     d = {}
     hasnode = repo.changelog.hasnode
     for k, v in marks.iteritems():
         # don't expose local divergent bookmarks
         if hasnode(v) and ('@' not in k or k.endswith('@')):
             d[k] = hex(v)
     return d
 
 def pushbookmark(repo, key, old, new):
     w = l = tr = None
     try:
         w = repo.wlock()
         l = repo.lock()
         tr = repo.transaction('bookmarks')
         marks = repo._bookmarks
         existing = hex(marks.get(key, ''))
         if existing != old and existing != new:
             return False
         if new == '':
             del marks[key]
         else:
             if new not in repo:
                 return False
             marks[key] = repo[new].node()
         marks.recordchange(tr)
         tr.close()
         return True
     finally:
         lockmod.release(tr, l, w)
 
 def compare(repo, srcmarks, dstmarks,
             srchex=None, dsthex=None, targets=None):
     '''Compare bookmarks between srcmarks and dstmarks
 
     This returns tuple "(addsrc, adddst, advsrc, advdst, diverge,
     differ, invalid)", each are list of bookmarks below:
 
     :addsrc:  added on src side (removed on dst side, perhaps)
     :adddst:  added on dst side (removed on src side, perhaps)
     :advsrc:  advanced on src side
     :advdst:  advanced on dst side
     :diverge: diverge
     :differ:  changed, but changeset referred on src is unknown on dst
     :invalid: unknown on both side
     :same:    same on both side
 
     Each elements of lists in result tuple is tuple "(bookmark name,
     changeset ID on source side, changeset ID on destination
     side)". Each changeset IDs are 40 hexadecimal digit string or
     None.
 
     Changeset IDs of tuples in "addsrc", "adddst", "differ" or
      "invalid" list may be unknown for repo.
 
     This function expects that "srcmarks" and "dstmarks" return
     changeset ID in 40 hexadecimal digit string for specified
     bookmark. If not so (e.g. bmstore "repo._bookmarks" returning
     binary value), "srchex" or "dsthex" should be specified to convert
     into such form.
 
     If "targets" is specified, only bookmarks listed in it are
     examined.
     '''
     if not srchex:
         srchex = lambda x: x
     if not dsthex:
         dsthex = lambda x: x
 
     if targets:
         bset = set(targets)
     else:
         srcmarkset = set(srcmarks)
         dstmarkset = set(dstmarks)
         bset = srcmarkset | dstmarkset
 
     results = ([], [], [], [], [], [], [], [])
     addsrc = results[0].append
     adddst = results[1].append
     advsrc = results[2].append
     advdst = results[3].append
     diverge = results[4].append
     differ = results[5].append
     invalid = results[6].append
     same = results[7].append
 
     for b in sorted(bset):
         if b not in srcmarks:
             if b in dstmarks:
                 adddst((b, None, dsthex(dstmarks[b])))
             else:
                 invalid((b, None, None))
         elif b not in dstmarks:
             addsrc((b, srchex(srcmarks[b]), None))
         else:
             scid = srchex(srcmarks[b])
             dcid = dsthex(dstmarks[b])
             if scid == dcid:
                 same((b, scid, dcid))
             elif scid in repo and dcid in repo:
                 sctx = repo[scid]
                 dctx = repo[dcid]
                 if sctx.rev() < dctx.rev():
                     if validdest(repo, sctx, dctx):
                         advdst((b, scid, dcid))
                     else:
                         diverge((b, scid, dcid))
                 else:
                     if validdest(repo, dctx, sctx):
                         advsrc((b, scid, dcid))
                     else:
                         diverge((b, scid, dcid))
             else:
                 # it is too expensive to examine in detail, in this case
                 differ((b, scid, dcid))
 
     return results
 
-def _diverge(ui, b, path, localmarks):
+def _diverge(ui, b, path, localmarks, remotenode):
     '''Return appropriate diverged bookmark for specified ``path``
 
     This returns None, if it is failed to assign any divergent
     bookmark name.
+
+    This reuses already existing one with "@number" suffix, if it
+    refers ``remotenode``.
     '''
     if b == '@':
         b = ''
     # try to use an @pathalias suffix
     # if an @pathalias already exists, we overwrite (update) it
     if path.startswith("file:"):
         path = util.url(path).path
     for p, u in ui.configitems("paths"):
         if u.startswith("file:"):
             u = util.url(u).path
         if path == u:
             return '%s@%s' % (b, p)
 
     # assign a unique "@number" suffix newly
     for x in range(1, 100):
         n = '%s@%d' % (b, x)
-        if n not in localmarks:
+        if n not in localmarks or localmarks[n] == remotenode:
             return n
 
     return None
 
 def updatefromremote(ui, repo, remotemarks, path, trfunc, explicit=()):
     ui.debug("checking for updated bookmarks\n")
     localmarks = repo._bookmarks
     (addsrc, adddst, advsrc, advdst, diverge, differ, invalid, same
      ) = compare(repo, remotemarks, localmarks, dsthex=hex)
 
     status = ui.status
     warn = ui.warn
     if ui.configbool('ui', 'quietbookmarkmove', False):
         status = warn = ui.debug
 
     explicit = set(explicit)
     changed = []
     for b, scid, dcid in addsrc:
         if scid in repo: # add remote bookmarks for changes we already have
             changed.append((b, bin(scid), status,
                             _("adding remote bookmark %s\n") % (b)))
     for b, scid, dcid in advsrc:
         changed.append((b, bin(scid), status,
                         _("updating bookmark %s\n") % (b)))
     # remove normal movement from explicit set
     explicit.difference_update(d[0] for d in changed)
 
     for b, scid, dcid in diverge:
         if b in explicit:
             explicit.discard(b)
             changed.append((b, bin(scid), status,
                             _("importing bookmark %s\n") % (b)))
         else:
-            db = _diverge(ui, b, path, localmarks)
+            snode = bin(scid)
+            db = _diverge(ui, b, path, localmarks, snode)
             if db:
-                changed.append((db, bin(scid), warn,
+                changed.append((db, snode, warn,
                                 _("divergent bookmark %s stored as %s\n") %
                                 (b, db)))
             else:
                 warn(_("warning: failed to assign numbered name "
                        "to divergent bookmark %s\n") % (b))
     for b, scid, dcid in adddst + advdst:
         if b in explicit:
             explicit.discard(b)
             changed.append((b, bin(scid), status,
                             _("importing bookmark %s\n") % (b)))
 
     if changed:
         tr = trfunc()
         for b, node, writer, msg in sorted(changed):
             localmarks[b] = node
             writer(msg)
         localmarks.recordchange(tr)
 
 def diff(ui, dst, src):
     ui.status(_("searching for changed bookmarks\n"))
 
     smarks = src.listkeys('bookmarks')
     dmarks = dst.listkeys('bookmarks')
 
     diff = sorted(set(smarks) - set(dmarks))
     for k in diff:
         if ui.debugflag:
             mark = smarks[k]
         else:
             mark = smarks[k][:12]
         ui.write("   %-25s %s\n" % (k, mark))
 
     if len(diff) <= 0:
         ui.status(_("no changed bookmarks found\n"))
         return 1
     return 0
 
 def validdest(repo, old, new):
     """Is the new bookmark destination a valid update from the old one"""
     repo = repo.unfiltered()
     if old == new:
         # Old == new -> nothing to update.
         return False
     elif not old:
         # old is nullrev, anything is valid.
         # (new != nullrev has been excluded by the previous check)
         return True
     elif repo.obsstore:
         return new.node() in obsolete.foreground(repo, [old.node()])
     else:
         # still an independent clause as it is lazier (and therefore faster)
         return old.descendant(new)

tests/test-bookmarks-pushpull.t

@@ -1,583 +1,601 b''
 #require serve
 
   $ cat << EOF >> $HGRCPATH
   > [ui]
   > logtemplate={rev}:{node|short} {desc|firstline}
   > [phases]
   > publish=False
   > [experimental]
   > evolution=createmarkers,exchange
   > EOF
 
 initialize
 
   $ hg init a
   $ cd a
   $ echo 'test' > test
   $ hg commit -Am'test'
   adding test
 
 set bookmarks
 
   $ hg bookmark X
   $ hg bookmark Y
   $ hg bookmark Z
 
 import bookmark by name
 
   $ hg init ../b
   $ cd ../b
   $ hg book Y
   $ hg book
    * Y                         -1:000000000000
   $ hg pull ../a
   pulling from ../a
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   adding remote bookmark X
   updating bookmark Y
   adding remote bookmark Z
   (run 'hg update' to get a working copy)
   $ hg bookmarks
      X                         0:4e3505fd9583
    * Y                         0:4e3505fd9583
      Z                         0:4e3505fd9583
   $ hg debugpushkey ../a namespaces
   bookmarks	
   namespaces	
   obsolete	
   phases	
   $ hg debugpushkey ../a bookmarks
   X	4e3505fd95835d721066b76e75dbb8cc554d7f77
   Y	4e3505fd95835d721066b76e75dbb8cc554d7f77
   Z	4e3505fd95835d721066b76e75dbb8cc554d7f77
 
 delete the bookmark to re-pull it
 
   $ hg book -d X
   $ hg pull -B X ../a
   pulling from ../a
   no changes found
   adding remote bookmark X
 
 finally no-op pull
 
   $ hg pull -B X ../a
   pulling from ../a
   no changes found
   $ hg bookmark
      X                         0:4e3505fd9583
    * Y                         0:4e3505fd9583
      Z                         0:4e3505fd9583
 
 export bookmark by name
 
   $ hg bookmark W
   $ hg bookmark foo
   $ hg bookmark foobar
   $ hg push -B W ../a
   pushing to ../a
   searching for changes
   no changes found
   exporting bookmark W
   [1]
   $ hg -R ../a bookmarks
      W                         -1:000000000000
      X                         0:4e3505fd9583
      Y                         0:4e3505fd9583
    * Z                         0:4e3505fd9583
 
 delete a remote bookmark
 
   $ hg book -d W
   $ hg push -B W ../a
   pushing to ../a
   searching for changes
   no changes found
   deleting remote bookmark W
   [1]
 
 push/pull name that doesn't exist
 
   $ hg push -B badname ../a
   pushing to ../a
   searching for changes
   bookmark badname does not exist on the local or remote repository!
   no changes found
   [2]
   $ hg pull -B anotherbadname ../a
   pulling from ../a
   abort: remote bookmark anotherbadname not found!
   [255]
 
 divergent bookmarks
 
   $ cd ../a
   $ echo c1 > f1
   $ hg ci -Am1
   adding f1
   $ hg book -f @
   $ hg book -f X
   $ hg book
      @                         1:0d2164f0ce0d
    * X                         1:0d2164f0ce0d
      Y                         0:4e3505fd9583
      Z                         1:0d2164f0ce0d
 
   $ cd ../b
   $ hg up
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   updating bookmark foobar
   $ echo c2 > f2
   $ hg ci -Am2
   adding f2
   $ hg book -if @
   $ hg book -if X
   $ hg book
      @                         1:9b140be10808
      X                         1:9b140be10808
      Y                         0:4e3505fd9583
      Z                         0:4e3505fd9583
      foo                       -1:000000000000
    * foobar                    1:9b140be10808
 
   $ hg pull --config paths.foo=../a foo
   pulling from $TESTTMP/a (glob)
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files (+1 heads)
   divergent bookmark @ stored as @foo
   divergent bookmark X stored as X@foo
   updating bookmark Z
   (run 'hg heads' to see heads, 'hg merge' to merge)
   $ hg book
      @                         1:9b140be10808
      @foo                      2:0d2164f0ce0d
      X                         1:9b140be10808
      X@foo                     2:0d2164f0ce0d
      Y                         0:4e3505fd9583
      Z                         2:0d2164f0ce0d
      foo                       -1:000000000000
    * foobar                    1:9b140be10808
 
 (test that too many divergence of bookmark)
 
   $ cat > $TESTTMP/seq.py <<EOF
   > import sys
   > for i in xrange(*[int(a) for a in sys.argv[1:]]):
   >     print i
   > EOF
   $ python $TESTTMP/seq.py 1 100 | while read i; do hg bookmarks -r 000000000000 "X@${i}"; done
   $ hg pull ../a
   pulling from ../a
   searching for changes
   no changes found
   warning: failed to assign numbered name to divergent bookmark X
   divergent bookmark @ stored as @1
   $ hg bookmarks | grep '^   X' | grep -v ':000000000000'
      X                         1:9b140be10808
      X@foo                     2:0d2164f0ce0d
+
+(test that remotely diverged bookmarks are reused if they aren't changed)
+
+  $ hg bookmarks | grep '^   @'
+     @                         1:9b140be10808
+     @1                        2:0d2164f0ce0d
+     @foo                      2:0d2164f0ce0d
+  $ hg pull ../a
+  pulling from ../a
+  searching for changes
+  no changes found
+  warning: failed to assign numbered name to divergent bookmark X
+  divergent bookmark @ stored as @1
+  $ hg bookmarks | grep '^   @'
+     @                         1:9b140be10808
+     @1                        2:0d2164f0ce0d
+     @foo                      2:0d2164f0ce0d
+
   $ python $TESTTMP/seq.py 1 100 | while read i; do hg bookmarks -d "X@${i}"; done
   $ hg bookmarks -d "@1"
 
   $ hg push -f ../a
   pushing to ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files (+1 heads)
   $ hg -R ../a book
      @                         1:0d2164f0ce0d
    * X                         1:0d2164f0ce0d
      Y                         0:4e3505fd9583
      Z                         1:0d2164f0ce0d
 
 explicit pull should overwrite the local version (issue4439)
 
   $ hg pull --config paths.foo=../a foo -B X
   pulling from $TESTTMP/a (glob)
   no changes found
   divergent bookmark @ stored as @foo
   importing bookmark X
 
 reinstall state for further testing:
 
   $ hg book -fr 9b140be10808 X
 
 revsets should not ignore divergent bookmarks
 
   $ hg bookmark -fr 1 Z
   $ hg log -r 'bookmark()' --template '{rev}:{node|short} {bookmarks}\n'
   0:4e3505fd9583 Y
   1:9b140be10808 @ X Z foobar
   2:0d2164f0ce0d @foo X@foo
   $ hg log -r 'bookmark("X@foo")' --template '{rev}:{node|short} {bookmarks}\n'
   2:0d2164f0ce0d @foo X@foo
   $ hg log -r 'bookmark("re:X@foo")' --template '{rev}:{node|short} {bookmarks}\n'
   2:0d2164f0ce0d @foo X@foo
 
 update a remote bookmark from a non-head to a head
 
   $ hg up -q Y
   $ echo c3 > f2
   $ hg ci -Am3
   adding f2
   created new head
   $ hg push ../a
   pushing to ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files (+1 heads)
   updating bookmark Y
   $ hg -R ../a book
      @                         1:0d2164f0ce0d
    * X                         1:0d2164f0ce0d
      Y                         3:f6fc62dde3c0
      Z                         1:0d2164f0ce0d
 
 update a bookmark in the middle of a client pulling changes
 
   $ cd ..
   $ hg clone -q a pull-race
   $ hg clone -q pull-race pull-race2
   $ cd pull-race
   $ hg up -q Y
   $ echo c4 > f2
   $ hg ci -Am4
   $ echo c5 > f3
   $ cat <<EOF > .hg/hgrc
   > [hooks]
   > outgoing.makecommit = hg ci -Am5; echo committed in pull-race
   > EOF
   $ cd ../pull-race2
   $ hg pull
   pulling from $TESTTMP/pull-race (glob)
   searching for changes
   adding changesets
   adding f3
   committed in pull-race
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   updating bookmark Y
   (run 'hg update' to get a working copy)
   $ hg book
    * @                         1:0d2164f0ce0d
      X                         1:0d2164f0ce0d
      Y                         4:b0a5eff05604
      Z                         1:0d2164f0ce0d
   $ cd ../b
 
 diverging a remote bookmark fails
 
   $ hg up -q 4e3505fd9583
   $ echo c4 > f2
   $ hg ci -Am4
   adding f2
   created new head
   $ echo c5 > f2
   $ hg ci -Am5
   $ hg log -G
   @  5:c922c0139ca0 5
   |
   o  4:4efff6d98829 4
   |
   | o  3:f6fc62dde3c0 3
   |/
   | o  2:0d2164f0ce0d 1
   |/
   | o  1:9b140be10808 2
   |/
   o  0:4e3505fd9583 test
   
 
   $ hg book -f Y
 
   $ cat <<EOF > ../a/.hg/hgrc
   > [web]
   > push_ssl = false
   > allow_push = *
   > EOF
 
   $ hg -R ../a serve -p $HGPORT2 -d --pid-file=../hg2.pid
   $ cat ../hg2.pid >> $DAEMON_PIDS
 
   $ hg push http://localhost:$HGPORT2/
   pushing to http://localhost:$HGPORT2/
   searching for changes
   abort: push creates new remote head c922c0139ca0 with bookmark 'Y'!
   (merge or see "hg help push" for details about pushing new heads)
   [255]
   $ hg -R ../a book
      @                         1:0d2164f0ce0d
    * X                         1:0d2164f0ce0d
      Y                         3:f6fc62dde3c0
      Z                         1:0d2164f0ce0d
 
 
 Unrelated marker does not alter the decision
 
   $ hg debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
   $ hg push http://localhost:$HGPORT2/
   pushing to http://localhost:$HGPORT2/
   searching for changes
   abort: push creates new remote head c922c0139ca0 with bookmark 'Y'!
   (merge or see "hg help push" for details about pushing new heads)
   [255]
   $ hg -R ../a book
      @                         1:0d2164f0ce0d
    * X                         1:0d2164f0ce0d
      Y                         3:f6fc62dde3c0
      Z                         1:0d2164f0ce0d
 
 Update to a successor works
 
   $ hg id --debug -r 3
   f6fc62dde3c0771e29704af56ba4d8af77abcc2f
   $ hg id --debug -r 4
   4efff6d98829d9c824c621afd6e3f01865f5439f
   $ hg id --debug -r 5
   c922c0139ca03858f655e4a2af4dd02796a63969 tip Y
   $ hg debugobsolete f6fc62dde3c0771e29704af56ba4d8af77abcc2f cccccccccccccccccccccccccccccccccccccccc
   $ hg debugobsolete cccccccccccccccccccccccccccccccccccccccc 4efff6d98829d9c824c621afd6e3f01865f5439f
   $ hg push http://localhost:$HGPORT2/
   pushing to http://localhost:$HGPORT2/
   searching for changes
   remote: adding changesets
   remote: adding manifests
   remote: adding file changes
   remote: added 2 changesets with 2 changes to 1 files (+1 heads)
   updating bookmark Y
   $ hg -R ../a book
      @                         1:0d2164f0ce0d
    * X                         1:0d2164f0ce0d
      Y                         5:c922c0139ca0
      Z                         1:0d2164f0ce0d
 
 hgweb
 
   $ cat <<EOF > .hg/hgrc
   > [web]
   > push_ssl = false
   > allow_push = *
   > EOF
 
   $ hg serve -p $HGPORT -d --pid-file=../hg.pid -E errors.log
   $ cat ../hg.pid >> $DAEMON_PIDS
   $ cd ../a
 
   $ hg debugpushkey http://localhost:$HGPORT/ namespaces
   bookmarks	
   namespaces	
   obsolete	
   phases	
   $ hg debugpushkey http://localhost:$HGPORT/ bookmarks
   @	9b140be1080824d768c5a4691a564088eede71f9
   X	9b140be1080824d768c5a4691a564088eede71f9
   Y	c922c0139ca03858f655e4a2af4dd02796a63969
   Z	9b140be1080824d768c5a4691a564088eede71f9
   foo	0000000000000000000000000000000000000000
   foobar	9b140be1080824d768c5a4691a564088eede71f9
   $ hg out -B http://localhost:$HGPORT/
   comparing with http://localhost:$HGPORT/
   searching for changed bookmarks
   no changed bookmarks found
   [1]
   $ hg push -B Z http://localhost:$HGPORT/
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found
   updating bookmark Z
   [1]
   $ hg book -d Z
   $ hg in -B http://localhost:$HGPORT/
   comparing with http://localhost:$HGPORT/
   searching for changed bookmarks
      Z                         0d2164f0ce0d
      foo                       000000000000
      foobar                    9b140be10808
   $ hg pull -B Z http://localhost:$HGPORT/
   pulling from http://localhost:$HGPORT/
   no changes found
   divergent bookmark @ stored as @1
   divergent bookmark X stored as X@1
   adding remote bookmark Z
   adding remote bookmark foo
   adding remote bookmark foobar
   $ hg clone http://localhost:$HGPORT/ cloned-bookmarks
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 5 changesets with 5 changes to 3 files (+2 heads)
   updating to bookmark @
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg -R cloned-bookmarks bookmarks
    * @                         1:9b140be10808
      X                         1:9b140be10808
      Y                         4:c922c0139ca0
      Z                         2:0d2164f0ce0d
      foo                       -1:000000000000
      foobar                    1:9b140be10808
 
   $ cd ..
 
 Pushing a bookmark should only push the changes required by that
 bookmark, not all outgoing changes:
   $ hg clone http://localhost:$HGPORT/ addmarks
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 5 changesets with 5 changes to 3 files (+2 heads)
   updating to bookmark @
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd addmarks
   $ echo foo > foo
   $ hg add foo
   $ hg commit -m 'add foo'
   $ echo bar > bar
   $ hg add bar
   $ hg commit -m 'add bar'
   $ hg co "tip^"
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (leaving bookmark @)
   $ hg book add-foo
   $ hg book -r tip add-bar
 Note: this push *must* push only a single changeset, as that's the point
 of this test.
   $ hg push -B add-foo --traceback
   pushing to http://localhost:$HGPORT/
   searching for changes
   remote: adding changesets
   remote: adding manifests
   remote: adding file changes
   remote: added 1 changesets with 1 changes to 1 files
   exporting bookmark add-foo
 
 pushing a new bookmark on a new head does not require -f if -B is specified
 
   $ hg up -q X
   $ hg book W
   $ echo c5 > f2
   $ hg ci -Am5
   created new head
   $ hg push -B W
   pushing to http://localhost:$HGPORT/
   searching for changes
   remote: adding changesets
   remote: adding manifests
   remote: adding file changes
   remote: added 1 changesets with 1 changes to 1 files (+1 heads)
   exporting bookmark W
   $ hg -R ../b id -r W
   cc978a373a53 tip W
 
   $ cd ..
 
 pushing an unchanged bookmark should result in no changes
 
   $ hg init unchanged-a
   $ hg init unchanged-b
   $ cd unchanged-a
   $ echo initial > foo
   $ hg commit -A -m initial
   adding foo
   $ hg bookmark @
   $ hg push -B @ ../unchanged-b
   pushing to ../unchanged-b
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   exporting bookmark @
 
   $ hg push -B @ ../unchanged-b
   pushing to ../unchanged-b
   searching for changes
   no changes found
   [1]
 
 
 Check hook preventing push (issue4455)
 ======================================
 
   $ hg bookmarks
    * @                         0:55482a6fb4b1
   $ hg log -G
   @  0:55482a6fb4b1 initial
   
   $ hg init ../issue4455-dest
   $ hg push ../issue4455-dest # changesets only
   pushing to ../issue4455-dest
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   $ cat >> .hg/hgrc << EOF
   > [paths]
   > local=../issue4455-dest/
   > ssh=ssh://user@dummy/issue4455-dest
   > http=http://localhost:$HGPORT/
   > [ui]
   > ssh=python "$TESTDIR/dummyssh"
   > EOF
   $ cat >> ../issue4455-dest/.hg/hgrc << EOF
   > [hooks]
   > prepushkey=false
   > [web]
   > push_ssl = false
   > allow_push = *
   > EOF
   $ "$TESTDIR/killdaemons.py" $DAEMON_PIDS
   $ hg -R ../issue4455-dest serve -p $HGPORT -d --pid-file=../issue4455.pid -E ../issue4455-error.log
   $ cat ../issue4455.pid >> $DAEMON_PIDS
 
 Local push
 ----------
 
   $ hg push -B @ local
   pushing to $TESTTMP/issue4455-dest (glob)
   searching for changes
   no changes found
   pushkey-abort: prepushkey hook exited with status 1
   exporting bookmark @ failed!
   [1]
   $ hg -R ../issue4455-dest/ bookmarks
   no bookmarks set
 
 Using ssh
 ---------
 
   $ hg push -B @ ssh
   pushing to ssh://user@dummy/issue4455-dest
   searching for changes
   no changes found
   remote: pushkey-abort: prepushkey hook exited with status 1
   exporting bookmark @ failed!
   [1]
   $ hg -R ../issue4455-dest/ bookmarks
   no bookmarks set
 
 Using http
 ----------
 
   $ hg push -B @ http
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found
   remote: pushkey-abort: prepushkey hook exited with status 1
   exporting bookmark @ failed!
   [1]
   $ hg -R ../issue4455-dest/ bookmarks
   no bookmarks set