remotenames: abort if literal revset pattern matches nothing

This is the convention of the other namespace revsets such as tag(). Let's
make the remote variants do the same.

hgext/remotenames.py

@@ -1,398 +1,403 b''
 # remotenames.py - extension to display remotenames
 #
 # Copyright 2017 Augie Fackler <[e-mail]>
 # Copyright 2017 Sean Farley <[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.
 
 """ showing remotebookmarks and remotebranches in UI (EXPERIMENTAL)
 
 By default both remotebookmarks and remotebranches are turned on. Config knob to
 control the individually are as follows.
 
 Config options to tweak the default behaviour:
 
 remotenames.bookmarks
   Boolean value to enable or disable showing of remotebookmarks (default: True)
 
 remotenames.branches
   Boolean value to enable or disable showing of remotebranches (default: True)
 
 remotenames.hoistedpeer
   Name of the peer whose remotebookmarks should be hoisted into the top-level
   namespace (default: 'default')
 """
 
 from __future__ import absolute_import
 
 from mercurial.i18n import _
 
 from mercurial.node import (
     bin,
 )
 from mercurial import (
     bookmarks,
+    error,
     extensions,
     logexchange,
     namespaces,
     pycompat,
     registrar,
     revsetlang,
     smartset,
     templateutil,
     util,
 )
 
 from mercurial.utils import (
     stringutil,
 )
 
 if pycompat.ispy3:
     import collections.abc
     mutablemapping = collections.abc.MutableMapping
 else:
     import collections
     mutablemapping = collections.MutableMapping
 
 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
 # be specifying the version(s) of Mercurial they are tested with, or
 # leave the attribute unspecified.
 testedwith = 'ships-with-hg-core'
 
 configtable = {}
 configitem = registrar.configitem(configtable)
 templatekeyword = registrar.templatekeyword()
 revsetpredicate = registrar.revsetpredicate()
 
 configitem('remotenames', 'bookmarks',
     default=True,
 )
 configitem('remotenames', 'branches',
     default=True,
 )
 configitem('remotenames', 'hoistedpeer',
     default='default',
 )
 
 class lazyremotenamedict(mutablemapping):
     """
     Read-only dict-like Class to lazily resolve remotename entries
 
     We are doing that because remotenames startup was slow.
     We lazily read the remotenames file once to figure out the potential entries
     and store them in self.potentialentries. Then when asked to resolve an
     entry, if it is not in self.potentialentries, then it isn't there, if it
     is in self.potentialentries we resolve it and store the result in
     self.cache. We cannot be lazy is when asked all the entries (keys).
     """
     def __init__(self, kind, repo):
         self.cache = {}
         self.potentialentries = {}
         self._kind = kind # bookmarks or branches
         self._repo = repo
         self.loaded = False
 
     def _load(self):
         """ Read the remotenames file, store entries matching selected kind """
         self.loaded = True
         repo = self._repo
         for node, rpath, rname in logexchange.readremotenamefile(repo,
                                                                 self._kind):
             name = rpath + '/' + rname
             self.potentialentries[name] = (node, rpath, name)
 
     def _resolvedata(self, potentialentry):
         """ Check that the node for potentialentry exists and return it """
         if not potentialentry in self.potentialentries:
             return None
         node, remote, name = self.potentialentries[potentialentry]
         repo = self._repo
         binnode = bin(node)
         # if the node doesn't exist, skip it
         try:
             repo.changelog.rev(binnode)
         except LookupError:
             return None
         # Skip closed branches
         if (self._kind == 'branches' and repo[binnode].closesbranch()):
             return None
         return [binnode]
 
     def __getitem__(self, key):
         if not self.loaded:
             self._load()
         val = self._fetchandcache(key)
         if val is not None:
             return val
         else:
             raise KeyError()
 
     def __iter__(self):
         return iter(self.potentialentries)
 
     def __len__(self):
         return len(self.potentialentries)
 
     def __setitem__(self):
         raise NotImplementedError
 
     def __delitem__(self):
         raise NotImplementedError
 
     def _fetchandcache(self, key):
         if key in self.cache:
             return self.cache[key]
         val = self._resolvedata(key)
         if val is not None:
             self.cache[key] = val
             return val
         else:
             return None
 
     def keys(self):
         """ Get a list of bookmark or branch names """
         if not self.loaded:
             self._load()
         return self.potentialentries.keys()
 
     def iteritems(self):
         """ Iterate over (name, node) tuples """
 
         if not self.loaded:
             self._load()
 
         for k, vtup in self.potentialentries.iteritems():
             yield (k, [bin(vtup[0])])
 
 class remotenames(object):
     """
     This class encapsulates all the remotenames state. It also contains
     methods to access that state in convenient ways. Remotenames are lazy
     loaded. Whenever client code needs to ensure the freshest copy of
     remotenames, use the `clearnames` method to force an eventual load.
     """
 
     def __init__(self, repo, *args):
         self._repo = repo
         self.clearnames()
 
     def clearnames(self):
         """ Clear all remote names state """
         self.bookmarks = lazyremotenamedict("bookmarks", self._repo)
         self.branches = lazyremotenamedict("branches", self._repo)
         self._invalidatecache()
 
     def _invalidatecache(self):
         self._nodetobmarks = None
         self._nodetobranch = None
         self._hoisttonodes = None
         self._nodetohoists = None
 
     def bmarktonodes(self):
         return self.bookmarks
 
     def nodetobmarks(self):
         if not self._nodetobmarks:
             bmarktonodes = self.bmarktonodes()
             self._nodetobmarks = {}
             for name, node in bmarktonodes.iteritems():
                 self._nodetobmarks.setdefault(node[0], []).append(name)
         return self._nodetobmarks
 
     def branchtonodes(self):
         return self.branches
 
     def nodetobranch(self):
         if not self._nodetobranch:
             branchtonodes = self.branchtonodes()
             self._nodetobranch = {}
             for name, nodes in branchtonodes.iteritems():
                 for node in nodes:
                     self._nodetobranch.setdefault(node, []).append(name)
         return self._nodetobranch
 
     def hoisttonodes(self, hoist):
         if not self._hoisttonodes:
             marktonodes = self.bmarktonodes()
             self._hoisttonodes = {}
             hoist += '/'
             for name, node in marktonodes.iteritems():
                 if name.startswith(hoist):
                     name = name[len(hoist):]
                     self._hoisttonodes[name] = node
         return self._hoisttonodes
 
     def nodetohoists(self, hoist):
         if not self._nodetohoists:
             marktonodes = self.bmarktonodes()
             self._nodetohoists = {}
             hoist += '/'
             for name, node in marktonodes.iteritems():
                 if name.startswith(hoist):
                     name = name[len(hoist):]
                     self._nodetohoists.setdefault(node[0], []).append(name)
         return self._nodetohoists
 
 def wrapprintbookmarks(orig, ui, repo, fm, bmarks):
     if 'remotebookmarks' not in repo.names:
         return
     ns = repo.names['remotebookmarks']
 
     for name in ns.listnames(repo):
         nodes = ns.nodes(repo, name)
         if not nodes:
             continue
         node = nodes[0]
 
         bmarks[name] = (node, ' ', '')
 
     return orig(ui, repo, fm, bmarks)
 
 def extsetup(ui):
     extensions.wrapfunction(bookmarks, '_printbookmarks', wrapprintbookmarks)
 
 def reposetup(ui, repo):
 
     # set the config option to store remotenames
     repo.ui.setconfig('experimental', 'remotenames', True, 'remotenames-ext')
 
     if not repo.local():
         return
 
     repo._remotenames = remotenames(repo)
     ns = namespaces.namespace
 
     if ui.configbool('remotenames', 'bookmarks'):
         remotebookmarkns = ns(
             'remotebookmarks',
             templatename='remotebookmarks',
             colorname='remotebookmark',
             logfmt='remote bookmark:  %s\n',
             listnames=lambda repo: repo._remotenames.bmarktonodes().keys(),
             namemap=lambda repo, name:
                 repo._remotenames.bmarktonodes().get(name, []),
             nodemap=lambda repo, node:
                 repo._remotenames.nodetobmarks().get(node, []))
         repo.names.addnamespace(remotebookmarkns)
 
         # hoisting only works if there are remote bookmarks
         hoist = ui.config('remotenames', 'hoistedpeer')
         if hoist:
             hoistednamens = ns(
                 'hoistednames',
                 templatename='hoistednames',
                 colorname='hoistedname',
                 logfmt='hoisted name:  %s\n',
                 listnames = lambda repo:
                     repo._remotenames.hoisttonodes(hoist).keys(),
                 namemap = lambda repo, name:
                     repo._remotenames.hoisttonodes(hoist).get(name, []),
                 nodemap = lambda repo, node:
                     repo._remotenames.nodetohoists(hoist).get(node, []))
             repo.names.addnamespace(hoistednamens)
 
     if ui.configbool('remotenames', 'branches'):
         remotebranchns = ns(
             'remotebranches',
             templatename='remotebranches',
             colorname='remotebranch',
             logfmt='remote branch:  %s\n',
             listnames = lambda repo: repo._remotenames.branchtonodes().keys(),
             namemap = lambda repo, name:
                 repo._remotenames.branchtonodes().get(name, []),
             nodemap = lambda repo, node:
                 repo._remotenames.nodetobranch().get(node, []))
         repo.names.addnamespace(remotebranchns)
 
 @templatekeyword('remotenames', requires={'repo', 'ctx'})
 def remotenameskw(context, mapping):
     """List of strings. Remote names associated with the changeset."""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
 
     remotenames = []
     if 'remotebookmarks' in repo.names:
         remotenames = repo.names['remotebookmarks'].names(repo, ctx.node())
 
     if 'remotebranches' in repo.names:
         remotenames += repo.names['remotebranches'].names(repo, ctx.node())
 
     return templateutil.compatlist(context, mapping, 'remotename', remotenames,
                                    plural='remotenames')
 
 @templatekeyword('remotebookmarks', requires={'repo', 'ctx'})
 def remotebookmarkskw(context, mapping):
     """List of strings. Remote bookmarks associated with the changeset."""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
 
     remotebmarks = []
     if 'remotebookmarks' in repo.names:
         remotebmarks = repo.names['remotebookmarks'].names(repo, ctx.node())
 
     return templateutil.compatlist(context, mapping, 'remotebookmark',
                                    remotebmarks, plural='remotebookmarks')
 
 @templatekeyword('remotebranches', requires={'repo', 'ctx'})
 def remotebrancheskw(context, mapping):
     """List of strings. Remote branches associated with the changeset."""
     repo = context.resource(mapping, 'repo')
     ctx = context.resource(mapping, 'ctx')
 
     remotebranches = []
     if 'remotebranches' in repo.names:
         remotebranches = repo.names['remotebranches'].names(repo, ctx.node())
 
     return templateutil.compatlist(context, mapping, 'remotebranch',
                                    remotebranches, plural='remotebranches')
 
 def _revsetutil(repo, subset, x, rtypes):
     """utility function to return a set of revs based on the rtypes"""
     args = revsetlang.getargs(x, 0, 1, _('only one argument accepted'))
     if args:
         kind, pattern, matcher = stringutil.stringmatcher(
             revsetlang.getstring(args[0], _('argument must be a string')))
     else:
+        kind = pattern = None
         matcher = util.always
 
     nodes = set()
     cl = repo.changelog
     for rtype in rtypes:
         if rtype in repo.names:
             ns = repo.names[rtype]
             for name in ns.listnames(repo):
                 if not matcher(name):
                     continue
                 nodes.update(ns.nodes(repo, name))
+    if kind == 'literal' and not nodes:
+        raise error.RepoLookupError(_("remote name '%s' does not exist")
+                                    % pattern)
 
     revs = (cl.rev(n) for n in nodes if cl.hasnode(n))
     return subset & smartset.baseset(revs)
 
 @revsetpredicate('remotenames([name])')
 def remotenamesrevset(repo, subset, x):
     """All changesets which have a remotename on them. If `name` is
     specified, only remotenames of matching remote paths are considered.
 
     Pattern matching is supported for `name`. See :hg:`help revisions.patterns`.
     """
     return _revsetutil(repo, subset, x, ('remotebookmarks', 'remotebranches'))
 
 @revsetpredicate('remotebranches([name])')
 def remotebranchesrevset(repo, subset, x):
     """All changesets which are branch heads on remotes. If `name` is
     specified, only remotenames of matching remote paths are considered.
 
     Pattern matching is supported for `name`. See :hg:`help revisions.patterns`.
     """
     return _revsetutil(repo, subset, x, ('remotebranches',))
 
 @revsetpredicate('remotebookmarks([name])')
 def remotebmarksrevset(repo, subset, x):
     """All changesets which have bookmarks on remotes. If `name` is
     specified, only remotenames of matching remote paths are considered.
 
     Pattern matching is supported for `name`. See :hg:`help revisions.patterns`.
     """
     return _revsetutil(repo, subset, x, ('remotebookmarks',))

tests/test-logexchange.t

@@ -1,523 +1,533 b''
 Testing the functionality to pull remotenames
 =============================================
 
   $ cat >> $HGRCPATH << EOF
   > [ui]
   > ssh = "$PYTHON" "$TESTDIR/dummyssh"
   > [alias]
   > glog = log -G -T '{rev}:{node|short}  {desc}'
   > [extensions]
   > remotenames =
   > show =
   > EOF
 
 Making a server repo
 --------------------
 
   $ hg init server
   $ cd server
   $ for ch in a b c d e f g h; do
   >   echo "foo" >> $ch
   >   hg ci -Aqm "Added "$ch
   > done
   $ hg glog
   @  7:ec2426147f0e  Added h
   |
   o  6:87d6d6676308  Added g
   |
   o  5:825660c69f0c  Added f
   |
   o  4:aa98ab95a928  Added e
   |
   o  3:62615734edd5  Added d
   |
   o  2:28ad74487de9  Added c
   |
   o  1:29becc82797a  Added b
   |
   o  0:18d04c59bb5d  Added a
   
   $ hg bookmark -r 3 foo
   $ hg bookmark -r 6 bar
   $ hg up 4
   0 files updated, 0 files merged, 3 files removed, 0 files unresolved
   $ hg branch wat
   marked working directory as branch wat
   (branches are permanent and global, did you want a bookmark?)
   $ echo foo >> bar
   $ hg ci -Aqm "added bar"
 
 Making a client repo
 --------------------
 
   $ cd ..
 
   $ hg clone ssh://user@dummy/server client
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 9 changesets with 9 changes to 9 files (+1 heads)
   new changesets 18d04c59bb5d:3e1487808078
   updating to branch default
   8 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ cd client
   $ cat .hg/logexchange/bookmarks
   0
   
   87d6d66763085b629e6d7ed56778c79827273022\x00default\x00bar (esc)
   62615734edd52f06b6fb9c2beb429e4fe30d57b8\x00default\x00foo (esc)
 
   $ cat .hg/logexchange/branches
   0
   
   ec2426147f0e39dbc9cef599b066be6035ce691d\x00default\x00default (esc)
   3e1487808078543b0af6d10dadf5d46943578db0\x00default\x00wat (esc)
 
   $ hg show work
   o  3e14 (wat) (default/wat) added bar
   ~
   @  ec24 (default/default) Added h
   ~
 
   $ hg update "default/wat"
   1 files updated, 0 files merged, 3 files removed, 0 files unresolved
   $ hg identify
   3e1487808078 (wat) tip
 
 Making a new server
 -------------------
 
   $ cd ..
   $ hg init server2
   $ cd server2
   $ hg pull ../server/
   pulling from ../server/
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 9 changesets with 9 changes to 9 files (+1 heads)
   adding remote bookmark bar
   adding remote bookmark foo
   new changesets 18d04c59bb5d:3e1487808078
   (run 'hg heads' to see heads)
 
 Pulling form the new server
 ---------------------------
   $ cd ../client/
   $ hg pull ../server2/
   pulling from ../server2/
   searching for changes
   no changes found
   $ cat .hg/logexchange/bookmarks
   0
   
   62615734edd52f06b6fb9c2beb429e4fe30d57b8\x00default\x00foo (esc)
   87d6d66763085b629e6d7ed56778c79827273022\x00default\x00bar (esc)
   87d6d66763085b629e6d7ed56778c79827273022\x00$TESTTMP/server2\x00bar (esc)
   62615734edd52f06b6fb9c2beb429e4fe30d57b8\x00$TESTTMP/server2\x00foo (esc)
 
   $ cat .hg/logexchange/branches
   0
   
   3e1487808078543b0af6d10dadf5d46943578db0\x00default\x00wat (esc)
   ec2426147f0e39dbc9cef599b066be6035ce691d\x00default\x00default (esc)
   ec2426147f0e39dbc9cef599b066be6035ce691d\x00$TESTTMP/server2\x00default (esc)
   3e1487808078543b0af6d10dadf5d46943578db0\x00$TESTTMP/server2\x00wat (esc)
 
   $ hg log -G
   @  changeset:   8:3e1487808078
   |  branch:      wat
   |  tag:         tip
   |  remote branch:  $TESTTMP/server2/wat
   |  remote branch:  default/wat
   |  parent:      4:aa98ab95a928
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     added bar
   |
   | o  changeset:   7:ec2426147f0e
   | |  remote branch:  $TESTTMP/server2/default
   | |  remote branch:  default/default
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     Added h
   | |
   | o  changeset:   6:87d6d6676308
   | |  bookmark:    bar
   | |  remote bookmark:  $TESTTMP/server2/bar
   | |  remote bookmark:  default/bar
   | |  hoisted name:  bar
   | |  user:        test
   | |  date:        Thu Jan 01 00:00:00 1970 +0000
   | |  summary:     Added g
   | |
   | o  changeset:   5:825660c69f0c
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     Added f
   |
   o  changeset:   4:aa98ab95a928
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     Added e
   |
   o  changeset:   3:62615734edd5
   |  bookmark:    foo
   |  remote bookmark:  $TESTTMP/server2/foo
   |  remote bookmark:  default/foo
   |  hoisted name:  foo
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     Added d
   |
   o  changeset:   2:28ad74487de9
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     Added c
   |
   o  changeset:   1:29becc82797a
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     Added b
   |
   o  changeset:   0:18d04c59bb5d
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     Added a
   
 Testing the templates provided by remotenames extension
 
 `remotenames` keyword
 
   $ hg log -G -T "{rev}:{node|short} {remotenames}\n"
   @  8:3e1487808078 $TESTTMP/server2/wat default/wat
   |
   | o  7:ec2426147f0e $TESTTMP/server2/default default/default
   | |
   | o  6:87d6d6676308 $TESTTMP/server2/bar default/bar
   | |
   | o  5:825660c69f0c
   |/
   o  4:aa98ab95a928
   |
   o  3:62615734edd5 $TESTTMP/server2/foo default/foo
   |
   o  2:28ad74487de9
   |
   o  1:29becc82797a
   |
   o  0:18d04c59bb5d
   
 `remotebookmarks` and `remotebranches` keywords
 
   $ hg log -G -T "{rev}:{node|short} [{remotebookmarks}] ({remotebranches})"
   @  8:3e1487808078 [] ($TESTTMP/server2/wat default/wat)
   |
   | o  7:ec2426147f0e [] ($TESTTMP/server2/default default/default)
   | |
   | o  6:87d6d6676308 [$TESTTMP/server2/bar default/bar] ()
   | |
   | o  5:825660c69f0c [] ()
   |/
   o  4:aa98ab95a928 [] ()
   |
   o  3:62615734edd5 [$TESTTMP/server2/foo default/foo] ()
   |
   o  2:28ad74487de9 [] ()
   |
   o  1:29becc82797a [] ()
   |
   o  0:18d04c59bb5d [] ()
   
 The `hoistednames` template keyword
 
   $ hg log -GT "{rev}:{node|short} ({hoistednames})"
   @  8:3e1487808078 ()
   |
   | o  7:ec2426147f0e ()
   | |
   | o  6:87d6d6676308 (bar)
   | |
   | o  5:825660c69f0c ()
   |/
   o  4:aa98ab95a928 ()
   |
   o  3:62615734edd5 (foo)
   |
   o  2:28ad74487de9 ()
   |
   o  1:29becc82797a ()
   |
   o  0:18d04c59bb5d ()
   
 
 Testing the revsets provided by remotenames extension
 
 `remotenames` revset
 
   $ hg log -r "remotenames()" -GT "{rev}:{node|short} {remotenames}\n"
   @  8:3e1487808078 $TESTTMP/server2/wat default/wat
   :
   : o  7:ec2426147f0e $TESTTMP/server2/default default/default
   : |
   : o  6:87d6d6676308 $TESTTMP/server2/bar default/bar
   :/
   o  3:62615734edd5 $TESTTMP/server2/foo default/foo
   |
   ~
 
 `remotebranches` revset
 
   $ hg log -r "remotebranches()" -GT "{rev}:{node|short} {remotenames}\n"
   @  8:3e1487808078 $TESTTMP/server2/wat default/wat
   |
   ~
   o  7:ec2426147f0e $TESTTMP/server2/default default/default
   |
   ~
 
 `remotebookmarks` revset
 
   $ hg log -r "remotebookmarks()" -GT "{rev}:{node|short} {remotenames}\n"
   o  6:87d6d6676308 $TESTTMP/server2/bar default/bar
   :
   o  3:62615734edd5 $TESTTMP/server2/foo default/foo
   |
   ~
 
 Updating to revision using hoisted name
 ---------------------------------------
 
 Deleting local bookmark to make sure we update to hoisted name only
 
   $ hg bookmark -d bar
 
   $ hg up bar
   2 files updated, 0 files merged, 1 files removed, 0 files unresolved
 
   $ hg log -r .
   changeset:   6:87d6d6676308
   remote bookmark:  $TESTTMP/server2/bar
   remote bookmark:  default/bar
   hoisted name:  bar
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     Added g
   
 When both local bookmark and hoisted name exists but on different revs
 
   $ hg up 8
   1 files updated, 0 files merged, 2 files removed, 0 files unresolved
 
   $ hg bookmark foo
   moving bookmark 'foo' forward from 62615734edd5
 
 Local bookmark should take precedence over hoisted name
 
   $ hg up foo
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ hg log -r .
   changeset:   8:3e1487808078
   branch:      wat
   bookmark:    foo
   tag:         tip
   remote branch:  $TESTTMP/server2/wat
   remote branch:  default/wat
   parent:      4:aa98ab95a928
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     added bar
   
   $ hg bookmarks
      $TESTTMP/server2/bar 6:87d6d6676308
      $TESTTMP/server2/foo 3:62615734edd5
      default/bar               6:87d6d6676308
      default/foo               3:62615734edd5
    * foo                       8:3e1487808078
 
 Testing the remotenames sychronization during `hg push`
 -------------------------------------------------------
 
   $ cd ../server/
   $ hg bookmark foo
   moving bookmark 'foo' forward from 62615734edd5
 
 After the push, default/foo should move to rev 8
   $ cd ../client/
   $ hg push
   pushing to ssh://user@dummy/server
   searching for changes
   no changes found
   [1]
   $ hg log -Gr 'remotenames()'
   @  changeset:   8:3e1487808078
   :  branch:      wat
   :  bookmark:    foo
   :  tag:         tip
   :  remote bookmark:  default/foo
   :  hoisted name:  foo
   :  remote branch:  $TESTTMP/server2/wat
   :  remote branch:  default/wat
   :  parent:      4:aa98ab95a928
   :  user:        test
   :  date:        Thu Jan 01 00:00:00 1970 +0000
   :  summary:     added bar
   :
   : o  changeset:   7:ec2426147f0e
   : |  remote branch:  $TESTTMP/server2/default
   : |  remote branch:  default/default
   : |  user:        test
   : |  date:        Thu Jan 01 00:00:00 1970 +0000
   : |  summary:     Added h
   : |
   : o  changeset:   6:87d6d6676308
   :/   remote bookmark:  $TESTTMP/server2/bar
   :    remote bookmark:  default/bar
   :    hoisted name:  bar
   :    user:        test
   :    date:        Thu Jan 01 00:00:00 1970 +0000
   :    summary:     Added g
   :
   o  changeset:   3:62615734edd5
   |  remote bookmark:  $TESTTMP/server2/foo
   ~  user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     Added d
   
   $ hg bookmarks
      $TESTTMP/server2/bar 6:87d6d6676308
      $TESTTMP/server2/foo 3:62615734edd5
      default/bar               6:87d6d6676308
      default/foo               8:3e1487808078
    * foo                       8:3e1487808078
 
 Testing the names argument to remotenames, remotebranches and remotebookmarks revsets
 --------------------------------------------------------------------------------------
 
   $ cd ..
   $ hg clone ssh://user@dummy/server client2
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 9 changesets with 9 changes to 9 files (+1 heads)
   new changesets 18d04c59bb5d:3e1487808078
   updating to branch default
   8 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd server2
   $ hg up wat
   6 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo foo > watwat
   $ hg ci -Aqm "added watwat"
   $ hg bookmark bar
   abort: bookmark 'bar' already exists (use -f to force)
   [255]
   $ hg up ec24
   3 files updated, 0 files merged, 2 files removed, 0 files unresolved
   $ echo i > i
   $ hg ci -Aqm "added i"
 
   $ cd ../client2
   $ echo "[paths]" >> .hg/hgrc
   $ echo "server2 = $TESTTMP/server2" >> .hg/hgrc
   $ hg pull server2
   pulling from $TESTTMP/server2
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 2 files
   new changesets f34adec73c21:bf433e48adea
   (run 'hg update' to get a working copy)
 
   $ hg log -Gr 'remotenames()' -T '{rev}:{node|short} {desc}\n({remotebranches})  [{remotebookmarks}]\n\n'
   o  10:bf433e48adea added i
   |  (server2/default)  []
   |
   | o  9:f34adec73c21 added watwat
   | |  (server2/wat)  []
   | |
   | o  8:3e1487808078 added bar
   | :  (default/wat)  [default/foo]
   | :
   @ :  7:ec2426147f0e Added h
   | :  (default/default)  []
   | :
   o :  6:87d6d6676308 Added g
   :/   ()  [default/bar server2/bar]
   :
   o  3:62615734edd5 Added d
   |  ()  [server2/foo]
   ~
 
 Testing for a single remote name which exists
 
   $ hg log -r 'remotebranches("default/wat")' -GT "{rev}:{node|short} {remotebranches}\n"
   o  8:3e1487808078 default/wat
   |
   ~
 
   $ hg log -r 'remotebookmarks("server2/foo")' -GT "{rev}:{node|short} {remotebookmarks}\n"
   o  3:62615734edd5 server2/foo
   |
   ~
 
   $ hg log -r 'remotenames("re:default")' -GT "{rev}:{node|short} {remotenames}\n"
   o  10:bf433e48adea server2/default
   |
   | o  8:3e1487808078 default/foo default/wat
   | |
   | ~
   @  7:ec2426147f0e default/default
   |
   o  6:87d6d6676308 default/bar server2/bar
   |
   ~
 
-Testing for a single name which does not exists
+Testing for a literal name which does not exists, which should fail.
 
   $ hg log -r 'remotebranches(def)' -GT "{rev}:{node|short} {remotenames}\n"
+  abort: remote name 'def' does not exist!
+  [255]
 
   $ hg log -r 'remotebookmarks("server3")' -GT "{rev}:{node|short} {remotenames}\n"
+  abort: remote name 'server3' does not exist!
+  [255]
 
   $ hg log -r 'remotenames("server3")' -GT "{rev}:{node|short} {remotenames}\n"
+  abort: remote name 'server3' does not exist!
+  [255]
+
+Testing for a pattern which does not match anything, which shouldn't fail.
+
+  $ hg log -r 'remotenames("re:^server3$")'
 
 Testing for multiple names, which is not supported.
 
   $ hg log -r 'remotenames("re:default", "re:server2")' -GT "{rev}:{node|short} {remotenames}\n"
   hg: parse error: only one argument accepted
   [255]
 
   $ hg log -r 'remotebranches("default/wat", "server2/wat")' -GT "{rev}:{node|short} {remotebranches}\n"
   hg: parse error: only one argument accepted
   [255]
 
   $ hg log -r 'remotebookmarks("default/foo", "server2/foo")' -GT "{rev}:{node|short} {remotebookmarks}\n"
   hg: parse error: only one argument accepted
   [255]
 
 Testing pattern matching
 
   $ hg log -r 'remotenames("re:def")' -GT "{rev}:{node|short} {remotenames}\n"
   o  10:bf433e48adea server2/default
   |
   | o  8:3e1487808078 default/foo default/wat
   | |
   | ~
   @  7:ec2426147f0e default/default
   |
   o  6:87d6d6676308 default/bar server2/bar
   |
   ~
 
   $ hg log -r 'remotebranches("re:ser.*2")' -GT "{rev}:{node|short} {remotebranches}\n"
   o  10:bf433e48adea server2/default
   |
   ~
   o  9:f34adec73c21 server2/wat
   |
   ~