clone: make sure to use "@" as bookmark and "default" as branch (issue3677)

Before this change a bookmark named "default" or a branch named "@" would
cause the wrong changeset to be checked out.

The change in output of test-hardlinks.t is due to the fact that no unneeded
tag lookups for the tags "@" or "default" happen, therefore the cache file is
not created.

mercurial/hg.py

@@ -1,610 +1,616
 # hg.py - repository classes for mercurial
 #
 # Copyright 2005-2007 Matt Mackall <[e-mail]>
 # Copyright 2006 Vadim Gelfer <[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.
 
 from i18n import _
 from lock import release
 from node import hex, nullid
 import localrepo, bundlerepo, httppeer, sshpeer, statichttprepo, bookmarks
 import lock, util, extensions, error, node, scmutil, phases
 import cmdutil, discovery
 import merge as mergemod
 import verify as verifymod
 import errno, os, shutil
 
 def _local(path):
     path = util.expandpath(util.urllocalpath(path))
     return (os.path.isfile(path) and bundlerepo or localrepo)
 
 def addbranchrevs(lrepo, other, branches, revs):
     peer = other.peer() # a courtesy to callers using a localrepo for other
     hashbranch, branches = branches
     if not hashbranch and not branches:
         return revs or None, revs and revs[0] or None
     revs = revs and list(revs) or []
     if not peer.capable('branchmap'):
         if branches:
             raise util.Abort(_("remote branch lookup not supported"))
         revs.append(hashbranch)
         return revs, revs[0]
     branchmap = peer.branchmap()
 
     def primary(branch):
         if branch == '.':
             if not lrepo:
                 raise util.Abort(_("dirstate branch not accessible"))
             branch = lrepo.dirstate.branch()
         if branch in branchmap:
             revs.extend(node.hex(r) for r in reversed(branchmap[branch]))
             return True
         else:
             return False
 
     for branch in branches:
         if not primary(branch):
             raise error.RepoLookupError(_("unknown branch '%s'") % branch)
     if hashbranch:
         if not primary(hashbranch):
             revs.append(hashbranch)
     return revs, revs[0]
 
 def parseurl(path, branches=None):
     '''parse url#branch, returning (url, (branch, branches))'''
 
     u = util.url(path)
     branch = None
     if u.fragment:
         branch = u.fragment
         u.fragment = None
     return str(u), (branch, branches or [])
 
 schemes = {
     'bundle': bundlerepo,
     'file': _local,
     'http': httppeer,
     'https': httppeer,
     'ssh': sshpeer,
     'static-http': statichttprepo,
 }
 
 def _peerlookup(path):
     u = util.url(path)
     scheme = u.scheme or 'file'
     thing = schemes.get(scheme) or schemes['file']
     try:
         return thing(path)
     except TypeError:
         return thing
 
 def islocal(repo):
     '''return true if repo or path is local'''
     if isinstance(repo, str):
         try:
             return _peerlookup(repo).islocal(repo)
         except AttributeError:
             return False
     return repo.local()
 
 def _peerorrepo(ui, path, create=False):
     """return a repository object for the specified path"""
     obj = _peerlookup(path).instance(ui, path, create)
     ui = getattr(obj, "ui", ui)
     for name, module in extensions.extensions():
         hook = getattr(module, 'reposetup', None)
         if hook:
             hook(ui, obj)
     return obj
 
 def repository(ui, path='', create=False):
     """return a repository object for the specified path"""
     peer = _peerorrepo(ui, path, create)
     repo = peer.local()
     if not repo:
         raise util.Abort(_("repository '%s' is not local") %
                          (path or peer.url()))
     return repo
 
 def peer(uiorrepo, opts, path, create=False):
     '''return a repository peer for the specified path'''
     rui = remoteui(uiorrepo, opts)
     return _peerorrepo(rui, path, create).peer()
 
 def defaultdest(source):
     '''return default destination of clone if none is given'''
     return os.path.basename(os.path.normpath(util.url(source).path))
 
 def share(ui, source, dest=None, update=True):
     '''create a shared repository'''
 
     if not islocal(source):
         raise util.Abort(_('can only share local repositories'))
 
     if not dest:
         dest = defaultdest(source)
     else:
         dest = ui.expandpath(dest)
 
     if isinstance(source, str):
         origsource = ui.expandpath(source)
         source, branches = parseurl(origsource)
         srcrepo = repository(ui, source)
         rev, checkout = addbranchrevs(srcrepo, srcrepo, branches, None)
     else:
         srcrepo = source.local()
         origsource = source = srcrepo.url()
         checkout = None
 
     sharedpath = srcrepo.sharedpath # if our source is already sharing
 
     root = os.path.realpath(dest)
     roothg = os.path.join(root, '.hg')
 
     if os.path.exists(roothg):
         raise util.Abort(_('destination already exists'))
 
     if not os.path.isdir(root):
         os.mkdir(root)
     util.makedir(roothg, notindexed=True)
 
     requirements = ''
     try:
         requirements = srcrepo.opener.read('requires')
     except IOError, inst:
         if inst.errno != errno.ENOENT:
             raise
 
     requirements += 'shared\n'
     util.writefile(os.path.join(roothg, 'requires'), requirements)
     util.writefile(os.path.join(roothg, 'sharedpath'), sharedpath)
 
     r = repository(ui, root)
 
     default = srcrepo.ui.config('paths', 'default')
     if default:
         fp = r.opener("hgrc", "w", text=True)
         fp.write("[paths]\n")
         fp.write("default = %s\n" % default)
         fp.close()
 
     if update:
         r.ui.status(_("updating working directory\n"))
         if update is not True:
             checkout = update
         for test in (checkout, 'default', 'tip'):
             if test is None:
                 continue
             try:
                 uprev = r.lookup(test)
                 break
             except error.RepoLookupError:
                 continue
         _update(r, uprev)
 
 def copystore(ui, srcrepo, destpath):
     '''copy files from store of srcrepo in destpath
 
     returns destlock
     '''
     destlock = None
     try:
         hardlink = None
         num = 0
         srcpublishing = srcrepo.ui.configbool('phases', 'publish', True)
         for f in srcrepo.store.copylist():
             if srcpublishing and f.endswith('phaseroots'):
                 continue
             src = os.path.join(srcrepo.sharedpath, f)
             dst = os.path.join(destpath, f)
             dstbase = os.path.dirname(dst)
             if dstbase and not os.path.exists(dstbase):
                 os.mkdir(dstbase)
             if os.path.exists(src):
                 if dst.endswith('data'):
                     # lock to avoid premature writing to the target
                     destlock = lock.lock(os.path.join(dstbase, "lock"))
                 hardlink, n = util.copyfiles(src, dst, hardlink)
                 num += n
         if hardlink:
             ui.debug("linked %d files\n" % num)
         else:
             ui.debug("copied %d files\n" % num)
         return destlock
     except: # re-raises
         release(destlock)
         raise
 
 def clone(ui, peeropts, source, dest=None, pull=False, rev=None,
           update=True, stream=False, branch=None):
     """Make a copy of an existing repository.
 
     Create a copy of an existing repository in a new directory.  The
     source and destination are URLs, as passed to the repository
     function.  Returns a pair of repository peers, the source and
     newly created destination.
 
     The location of the source is added to the new repository's
     .hg/hgrc file, as the default to be used for future pulls and
     pushes.
 
     If an exception is raised, the partly cloned/updated destination
     repository will be deleted.
 
     Arguments:
 
     source: repository object or URL
 
     dest: URL of destination repository to create (defaults to base
     name of source repository)
 
     pull: always pull from source repository, even in local case
 
     stream: stream raw data uncompressed from repository (fast over
     LAN, slow over WAN)
 
     rev: revision to clone up to (implies pull=True)
 
     update: update working directory after clone completes, if
     destination is local repository (True means update to default rev,
     anything else is treated as a revision)
 
     branch: branches to clone
     """
 
     if isinstance(source, str):
         origsource = ui.expandpath(source)
         source, branch = parseurl(origsource, branch)
         srcpeer = peer(ui, peeropts, source)
     else:
         srcpeer = source.peer() # in case we were called with a localrepo
         branch = (None, branch or [])
         origsource = source = srcpeer.url()
     rev, checkout = addbranchrevs(srcpeer, srcpeer, branch, rev)
 
     if dest is None:
         dest = defaultdest(source)
         ui.status(_("destination directory: %s\n") % dest)
     else:
         dest = ui.expandpath(dest)
 
     dest = util.urllocalpath(dest)
     source = util.urllocalpath(source)
 
     if not dest:
         raise util.Abort(_("empty destination path is not valid"))
     if os.path.exists(dest):
         if not os.path.isdir(dest):
             raise util.Abort(_("destination '%s' already exists") % dest)
         elif os.listdir(dest):
             raise util.Abort(_("destination '%s' is not empty") % dest)
 
     class DirCleanup(object):
         def __init__(self, dir_):
             self.rmtree = shutil.rmtree
             self.dir_ = dir_
         def close(self):
             self.dir_ = None
         def cleanup(self):
             if self.dir_:
                 self.rmtree(self.dir_, True)
 
     srclock = destlock = dircleanup = None
     srcrepo = srcpeer.local()
     try:
         abspath = origsource
         if islocal(origsource):
             abspath = os.path.abspath(util.urllocalpath(origsource))
 
         if islocal(dest):
             dircleanup = DirCleanup(dest)
 
         copy = False
         if (srcrepo and srcrepo.cancopy() and islocal(dest)
             and not phases.hassecret(srcrepo)):
             copy = not pull and not rev
 
         if copy:
             try:
                 # we use a lock here because if we race with commit, we
                 # can end up with extra data in the cloned revlogs that's
                 # not pointed to by changesets, thus causing verify to
                 # fail
                 srclock = srcrepo.lock(wait=False)
             except error.LockError:
                 copy = False
 
         if copy:
             srcrepo.hook('preoutgoing', throw=True, source='clone')
             hgdir = os.path.realpath(os.path.join(dest, ".hg"))
             if not os.path.exists(dest):
                 os.mkdir(dest)
             else:
                 # only clean up directories we create ourselves
                 dircleanup.dir_ = hgdir
             try:
                 destpath = hgdir
                 util.makedir(destpath, notindexed=True)
             except OSError, inst:
                 if inst.errno == errno.EEXIST:
                     dircleanup.close()
                     raise util.Abort(_("destination '%s' already exists")
                                      % dest)
                 raise
 
             destlock = copystore(ui, srcrepo, destpath)
 
             # Recomputing branch cache might be slow on big repos,
             # so just copy it
             dstcachedir = os.path.join(destpath, 'cache')
             srcbranchcache = srcrepo.sjoin('cache/branchheads')
             dstbranchcache = os.path.join(dstcachedir, 'branchheads')
             if os.path.exists(srcbranchcache):
                 if not os.path.exists(dstcachedir):
                     os.mkdir(dstcachedir)
                 util.copyfile(srcbranchcache, dstbranchcache)
 
             # we need to re-init the repo after manually copying the data
             # into it
             destpeer = peer(ui, peeropts, dest)
             srcrepo.hook('outgoing', source='clone',
                           node=node.hex(node.nullid))
         else:
             try:
                 destpeer = peer(ui, peeropts, dest, create=True)
             except OSError, inst:
                 if inst.errno == errno.EEXIST:
                     dircleanup.close()
                     raise util.Abort(_("destination '%s' already exists")
                                      % dest)
                 raise
 
             revs = None
             if rev:
                 if not srcpeer.capable('lookup'):
                     raise util.Abort(_("src repository does not support "
                                        "revision lookup and so doesn't "
                                        "support clone by revision"))
                 revs = [srcpeer.lookup(r) for r in rev]
                 checkout = revs[0]
             if destpeer.local():
                 destpeer.local().clone(srcpeer, heads=revs, stream=stream)
             elif srcrepo:
                 srcrepo.push(destpeer, revs=revs)
             else:
                 raise util.Abort(_("clone from remote to remote not supported"))
 
         if dircleanup:
             dircleanup.close()
 
         # clone all bookmarks except divergent ones
         destrepo = destpeer.local()
         if destrepo and srcpeer.capable("pushkey"):
             rb = srcpeer.listkeys('bookmarks')
             for k, n in rb.iteritems():
                 try:
                     m = destrepo.lookup(n)
                     destrepo._bookmarks[k] = m
                 except error.RepoLookupError:
                     pass
             if rb:
                 bookmarks.write(destrepo)
         elif srcrepo and destpeer.capable("pushkey"):
             for k, n in srcrepo._bookmarks.iteritems():
                 destpeer.pushkey('bookmarks', k, '', hex(n))
 
         if destrepo:
             fp = destrepo.opener("hgrc", "w", text=True)
             fp.write("[paths]\n")
             u = util.url(abspath)
             u.passwd = None
             defaulturl = str(u)
             fp.write("default = %s\n" % defaulturl)
             fp.close()
 
             destrepo.ui.setconfig('paths', 'default', defaulturl)
 
             if update:
                 if update is not True:
                     checkout = srcpeer.lookup(update)
-                for test in (checkout, '@', 'default', 'tip'):
-                    if test is None:
-                        continue
+                uprev = None
+                if checkout is not None:
                     try:
-                        uprev = destrepo.lookup(test)
-                        break
+                        uprev = destrepo.lookup(checkout)
                     except error.RepoLookupError:
-                        continue
+                        pass
+                if uprev is None:
+                    try:
+                        uprev = destrepo._bookmarks['@']
+                    except KeyError:
+                        try:
+                            uprev = destrepo.branchtip('default')
+                        except error.RepoLookupError:
+                            uprev = destrepo.lookup('tip')
                 bn = destrepo[uprev].branch()
                 destrepo.ui.status(_("updating to branch %s\n") % bn)
                 _update(destrepo, uprev)
                 if update in destrepo._bookmarks:
                     bookmarks.setcurrent(destrepo, update)
 
         return srcpeer, destpeer
     finally:
         release(srclock, destlock)
         if dircleanup is not None:
             dircleanup.cleanup()
         if srcpeer is not None:
             srcpeer.close()
 
 def _showstats(repo, stats):
     repo.ui.status(_("%d files updated, %d files merged, "
                      "%d files removed, %d files unresolved\n") % stats)
 
 def update(repo, node):
     """update the working directory to node, merging linear changes"""
     stats = mergemod.update(repo, node, False, False, None)
     _showstats(repo, stats)
     if stats[3]:
         repo.ui.status(_("use 'hg resolve' to retry unresolved file merges\n"))
     return stats[3] > 0
 
 # naming conflict in clone()
 _update = update
 
 def clean(repo, node, show_stats=True):
     """forcibly switch the working directory to node, clobbering changes"""
     stats = mergemod.update(repo, node, False, True, None)
     if show_stats:
         _showstats(repo, stats)
     return stats[3] > 0
 
 def merge(repo, node, force=None, remind=True):
     """Branch merge with node, resolving changes. Return true if any
     unresolved conflicts."""
     stats = mergemod.update(repo, node, True, force, False)
     _showstats(repo, stats)
     if stats[3]:
         repo.ui.status(_("use 'hg resolve' to retry unresolved file merges "
                          "or 'hg update -C .' to abandon\n"))
     elif remind:
         repo.ui.status(_("(branch merge, don't forget to commit)\n"))
     return stats[3] > 0
 
 def _incoming(displaychlist, subreporecurse, ui, repo, source,
         opts, buffered=False):
     """
     Helper for incoming / gincoming.
     displaychlist gets called with
         (remoterepo, incomingchangesetlist, displayer) parameters,
     and is supposed to contain only code that can't be unified.
     """
     source, branches = parseurl(ui.expandpath(source), opts.get('branch'))
     other = peer(repo, opts, source)
     ui.status(_('comparing with %s\n') % util.hidepassword(source))
     revs, checkout = addbranchrevs(repo, other, branches, opts.get('rev'))
 
     if revs:
         revs = [other.lookup(rev) for rev in revs]
     other, chlist, cleanupfn = bundlerepo.getremotechanges(ui, repo, other,
                                 revs, opts["bundle"], opts["force"])
     try:
         if not chlist:
             ui.status(_("no changes found\n"))
             return subreporecurse()
 
         displayer = cmdutil.show_changeset(ui, other, opts, buffered)
 
         # XXX once graphlog extension makes it into core,
         # should be replaced by a if graph/else
         displaychlist(other, chlist, displayer)
 
         displayer.close()
     finally:
         cleanupfn()
     subreporecurse()
     return 0 # exit code is zero since we found incoming changes
 
 def incoming(ui, repo, source, opts):
     def subreporecurse():
         ret = 1
         if opts.get('subrepos'):
             ctx = repo[None]
             for subpath in sorted(ctx.substate):
                 sub = ctx.sub(subpath)
                 ret = min(ret, sub.incoming(ui, source, opts))
         return ret
 
     def display(other, chlist, displayer):
         limit = cmdutil.loglimit(opts)
         if opts.get('newest_first'):
             chlist.reverse()
         count = 0
         for n in chlist:
             if limit is not None and count >= limit:
                 break
             parents = [p for p in other.changelog.parents(n) if p != nullid]
             if opts.get('no_merges') and len(parents) == 2:
                 continue
             count += 1
             displayer.show(other[n])
     return _incoming(display, subreporecurse, ui, repo, source, opts)
 
 def _outgoing(ui, repo, dest, opts):
     dest = ui.expandpath(dest or 'default-push', dest or 'default')
     dest, branches = parseurl(dest, opts.get('branch'))
     ui.status(_('comparing with %s\n') % util.hidepassword(dest))
     revs, checkout = addbranchrevs(repo, repo, branches, opts.get('rev'))
     if revs:
         revs = [repo.lookup(rev) for rev in scmutil.revrange(repo, revs)]
 
     other = peer(repo, opts, dest)
     outgoing = discovery.findcommonoutgoing(repo, other, revs,
                                             force=opts.get('force'))
     o = outgoing.missing
     if not o:
         scmutil.nochangesfound(repo.ui, repo, outgoing.excluded)
         return None
     return o
 
 def outgoing(ui, repo, dest, opts):
     def recurse():
         ret = 1
         if opts.get('subrepos'):
             ctx = repo[None]
             for subpath in sorted(ctx.substate):
                 sub = ctx.sub(subpath)
                 ret = min(ret, sub.outgoing(ui, dest, opts))
         return ret
 
     limit = cmdutil.loglimit(opts)
     o = _outgoing(ui, repo, dest, opts)
     if o is None:
         return recurse()
 
     if opts.get('newest_first'):
         o.reverse()
     displayer = cmdutil.show_changeset(ui, repo, opts)
     count = 0
     for n in o:
         if limit is not None and count >= limit:
             break
         parents = [p for p in repo.changelog.parents(n) if p != nullid]
         if opts.get('no_merges') and len(parents) == 2:
             continue
         count += 1
         displayer.show(repo[n])
     displayer.close()
     recurse()
     return 0 # exit code is zero since we found outgoing changes
 
 def revert(repo, node, choose):
     """revert changes to revision in node without updating dirstate"""
     return mergemod.update(repo, node, False, True, choose)[3] > 0
 
 def verify(repo):
     """verify the consistency of a repository"""
     return verifymod.verify(repo)
 
 def remoteui(src, opts):
     'build a remote ui from ui or repo and opts'
     if util.safehasattr(src, 'baseui'): # looks like a repository
         dst = src.baseui.copy() # drop repo-specific config
         src = src.ui # copy target options from repo
     else: # assume it's a global ui object
         dst = src.copy() # keep all global options
 
     # copy ssh-specific options
     for o in 'ssh', 'remotecmd':
         v = opts.get(o) or src.config('ui', o)
         if v:
             dst.setconfig("ui", o, v)
 
     # copy bundle-specific options
     r = src.config('bundle', 'mainreporoot')
     if r:
         dst.setconfig('bundle', 'mainreporoot', r)
 
     # copy selected local settings to the remote ui
     for sect in ('auth', 'hostfingerprints', 'http_proxy'):
         for key, val in src.configitems(sect):
             dst.setconfig(sect, key, val)
     v = src.config('web', 'cacerts')
     if v:
         dst.setconfig('web', 'cacerts', util.expandpath(v))
 
     return dst

tests/test-hardlinks.t

@@ -1,352 +1,350
   $ "$TESTDIR/hghave" hardlink || exit 80
 
   $ cat > nlinks.py <<EOF
   > import sys
   > from mercurial import util
   > for f in sorted(sys.stdin.readlines()):
   >     f = f[:-1]
   >     print util.nlinks(f), f
   > EOF
 
   $ nlinksdir()
   > {
   >     find $1 -type f | python $TESTTMP/nlinks.py
   > }
 
 Some implementations of cp can't create hardlinks (replaces 'cp -al' on Linux):
 
   $ cat > linkcp.py <<EOF
   > from mercurial import util
   > import sys
   > util.copyfiles(sys.argv[1], sys.argv[2], hardlink=True)
   > EOF
 
   $ linkcp()
   > {
   >     python $TESTTMP/linkcp.py $1 $2
   > }
 
 Prepare repo r1:
 
   $ hg init r1
   $ cd r1
 
   $ echo c1 > f1
   $ hg add f1
   $ hg ci -m0
 
   $ mkdir d1
   $ cd d1
   $ echo c2 > f2
   $ hg add f2
   $ hg ci -m1
   $ cd ../..
 
   $ nlinksdir r1/.hg/store
   1 r1/.hg/store/00changelog.i
   1 r1/.hg/store/00manifest.i
   1 r1/.hg/store/data/d1/f2.i
   1 r1/.hg/store/data/f1.i
   1 r1/.hg/store/fncache
   1 r1/.hg/store/phaseroots
   1 r1/.hg/store/undo
   1 r1/.hg/store/undo.phaseroots
 
 
 Create hardlinked clone r2:
 
   $ hg clone -U --debug r1 r2
   linked 7 files
   listing keys for "bookmarks"
 
 Create non-hardlinked clone r3:
 
   $ hg clone --pull r1 r3
   requesting all changes
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 2 files
   updating to branch default
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 
 Repos r1 and r2 should now contain hardlinked files:
 
   $ nlinksdir r1/.hg/store
   2 r1/.hg/store/00changelog.i
   2 r1/.hg/store/00manifest.i
   2 r1/.hg/store/data/d1/f2.i
   2 r1/.hg/store/data/f1.i
   2 r1/.hg/store/fncache
   1 r1/.hg/store/phaseroots
   1 r1/.hg/store/undo
   1 r1/.hg/store/undo.phaseroots
 
   $ nlinksdir r2/.hg/store
   2 r2/.hg/store/00changelog.i
   2 r2/.hg/store/00manifest.i
   2 r2/.hg/store/data/d1/f2.i
   2 r2/.hg/store/data/f1.i
   2 r2/.hg/store/fncache
 
 Repo r3 should not be hardlinked:
 
   $ nlinksdir r3/.hg/store
   1 r3/.hg/store/00changelog.i
   1 r3/.hg/store/00manifest.i
   1 r3/.hg/store/data/d1/f2.i
   1 r3/.hg/store/data/f1.i
   1 r3/.hg/store/fncache
   1 r3/.hg/store/phaseroots
   1 r3/.hg/store/undo
   1 r3/.hg/store/undo.phaseroots
 
 
 Create a non-inlined filelog in r3:
 
   $ cd r3/d1
   >>> f = open('data1', 'wb')
   >>> for x in range(10000):
   ...     f.write("%s\n" % str(x))
   >>> f.close()
   $ for j in 0 1 2 3 4 5 6 7 8 9; do
   >   cat data1 >> f2
   >   hg commit -m$j
   > done
   $ cd ../..
 
   $ nlinksdir r3/.hg/store
   1 r3/.hg/store/00changelog.i
   1 r3/.hg/store/00manifest.i
   1 r3/.hg/store/data/d1/f2.d
   1 r3/.hg/store/data/d1/f2.i
   1 r3/.hg/store/data/f1.i
   1 r3/.hg/store/fncache
   1 r3/.hg/store/phaseroots
   1 r3/.hg/store/undo
   1 r3/.hg/store/undo.phaseroots
 
 Push to repo r1 should break up most hardlinks in r2:
 
   $ hg -R r2 verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   2 files, 2 changesets, 2 total revisions
 
   $ cd r3
   $ hg push
   pushing to $TESTTMP/r1 (glob)
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 10 changesets with 10 changes to 1 files
 
   $ cd ..
 
   $ nlinksdir r2/.hg/store
   1 r2/.hg/store/00changelog.i
   1 r2/.hg/store/00manifest.i
   1 r2/.hg/store/data/d1/f2.i
   2 r2/.hg/store/data/f1.i
   1 r2/.hg/store/fncache
 
   $ hg -R r2 verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   2 files, 2 changesets, 2 total revisions
 
 
   $ cd r1
   $ hg up
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 Committing a change to f1 in r1 must break up hardlink f1.i in r2:
 
   $ echo c1c1 >> f1
   $ hg ci -m00
   $ cd ..
 
   $ nlinksdir r2/.hg/store
   1 r2/.hg/store/00changelog.i
   1 r2/.hg/store/00manifest.i
   1 r2/.hg/store/data/d1/f2.i
   1 r2/.hg/store/data/f1.i
   1 r2/.hg/store/fncache
 
 
   $ cd r3
   $ hg tip --template '{rev}:{node|short}\n'
   11:a6451b6bc41f
   $ echo bla > f1
   $ hg ci -m1
   $ cd ..
 
 Create hardlinked copy r4 of r3 (on Linux, we would call 'cp -al'):
 
   $ linkcp r3 r4
 
 r4 has hardlinks in the working dir (not just inside .hg):
 
   $ nlinksdir r4
   2 r4/.hg/00changelog.i
   2 r4/.hg/branch
   2 r4/.hg/cache/branchheads
-  2 r4/.hg/cache/tags
   2 r4/.hg/dirstate
   2 r4/.hg/hgrc
   2 r4/.hg/last-message.txt
   2 r4/.hg/requires
   2 r4/.hg/store/00changelog.i
   2 r4/.hg/store/00manifest.i
   2 r4/.hg/store/data/d1/f2.d
   2 r4/.hg/store/data/d1/f2.i
   2 r4/.hg/store/data/f1.i
   2 r4/.hg/store/fncache
   2 r4/.hg/store/phaseroots
   2 r4/.hg/store/undo
   2 r4/.hg/store/undo.phaseroots
   2 r4/.hg/undo.bookmarks
   2 r4/.hg/undo.branch
   2 r4/.hg/undo.desc
   2 r4/.hg/undo.dirstate
   2 r4/d1/data1
   2 r4/d1/f2
   2 r4/f1
 
 Update back to revision 11 in r4 should break hardlink of file f1:
 
   $ hg -R r4 up 11
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
   $ nlinksdir r4
   2 r4/.hg/00changelog.i
   1 r4/.hg/branch
   2 r4/.hg/cache/branchheads
-  2 r4/.hg/cache/tags
   1 r4/.hg/dirstate
   2 r4/.hg/hgrc
   2 r4/.hg/last-message.txt
   2 r4/.hg/requires
   2 r4/.hg/store/00changelog.i
   2 r4/.hg/store/00manifest.i
   2 r4/.hg/store/data/d1/f2.d
   2 r4/.hg/store/data/d1/f2.i
   2 r4/.hg/store/data/f1.i
   2 r4/.hg/store/fncache
   2 r4/.hg/store/phaseroots
   2 r4/.hg/store/undo
   2 r4/.hg/store/undo.phaseroots
   2 r4/.hg/undo.bookmarks
   2 r4/.hg/undo.branch
   2 r4/.hg/undo.desc
   2 r4/.hg/undo.dirstate
   2 r4/d1/data1
   2 r4/d1/f2
   1 r4/f1
 
 
 Test hardlinking outside hg:
 
   $ mkdir x
   $ echo foo > x/a
 
   $ linkcp x y
   $ echo bar >> y/a
 
 No diff if hardlink:
 
   $ diff x/a y/a
 
 Test mq hardlinking:
 
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "mq=" >> $HGRCPATH
 
   $ hg init a
   $ cd a
 
   $ hg qimport -n foo - << EOF
   > # HG changeset patch
   > # Date 1 0
   > diff -r 2588a8b53d66 a
   > --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   > +++ b/a	Wed Jul 23 15:54:29 2008 +0200
   > @@ -0,0 +1,1 @@
   > +a
   > EOF
   adding foo to series file
 
   $ hg qpush
   applying foo
   now at: foo
 
   $ cd ..
   $ linkcp a b
   $ cd b
 
   $ hg qimport -n bar - << EOF
   > # HG changeset patch
   > # Date 2 0
   > diff -r 2588a8b53d66 a
   > --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   > +++ b/b	Wed Jul 23 15:54:29 2008 +0200
   > @@ -0,0 +1,1 @@
   > +b
   > EOF
   adding bar to series file
 
   $ hg qpush
   applying bar
   now at: bar
 
   $ cat .hg/patches/status
   430ed4828a74fa4047bc816a25500f7472ab4bfe:foo
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c:bar
 
   $ cat .hg/patches/series
   foo
   bar
 
   $ cat ../a/.hg/patches/status
   430ed4828a74fa4047bc816a25500f7472ab4bfe:foo
 
   $ cat ../a/.hg/patches/series
   foo
 
 Test tags hardlinking:
 
   $ hg qdel -r qbase:qtip
   patch foo finalized without changeset message
   patch bar finalized without changeset message
 
   $ hg tag -l lfoo
   $ hg tag foo
 
   $ cd ..
   $ linkcp b c
   $ cd c
 
   $ hg tag -l -r 0 lbar
   $ hg tag -r 0 bar
 
   $ cat .hgtags
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c foo
   430ed4828a74fa4047bc816a25500f7472ab4bfe bar
 
   $ cat .hg/localtags
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c lfoo
   430ed4828a74fa4047bc816a25500f7472ab4bfe lbar
 
   $ cat ../b/.hgtags
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c foo
 
   $ cat ../b/.hg/localtags
   4e7abb4840c46a910f6d7b4d3c3fc7e5209e684c lfoo
 
   $ cd ..