merge: run update hook after the last wlock release

There were 2 test failures in 3.4-rc when running test-hook.t with the
largefiles extension enabled.  For context, the first is a commit hook:

  @@ -618,9 +621,9 @@
     $ echo 'update = hg id' >> .hg/hgrc
     $ echo bb > a
     $ hg ci -ma
  -  223eafe2750c tip
  +  d3354c4310ed+
     $ hg up 0
  -  cb9a9f314b8b
  +  223eafe2750c+ tip
     1 files updated, 0 files merged, 0 files removed, 0 files unresolved

   make sure --verbose (and --quiet/--debug etc.) are propagated to the local ui

In both cases, largefiles acquires the wlock before calling into core, which
also acquires the wlock.  The first case was fixed in 57f1dbc99631 by ensuring
the hook only runs after the lock has been fully released.  The full release is
important, because that is what writes dirstate to the disk, allowing external
hooks to see the result of the update.  This simply changes how the update hook
is called, so that it too is deferred until the lock is finally released.

There are many uses of mergemod.update(), but in terms of commands, it looks
like the following commands take wlock while calling mergemod.update(), and
therefore will now have their hook fired at a later time:

    backout, fetch, histedit, qpush, rebase, shelve, transplant

Unlike the others, fetch immediately unlocks after calling update(), so for all
intents and purposes, its hook invocation is not deferred (but the external hook
still sees the proper state).

mercurial/merge.py

@@ -1,1205 +1,1207 b''
 # merge.py - directory-level update/merge handling for Mercurial
 #
 # Copyright 2006, 2007 Matt Mackall <[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 struct
 
 from node import nullid, nullrev, hex, bin
 from i18n import _
 from mercurial import obsolete
 import error as errormod, util, filemerge, copies, subrepo, worker
 import errno, os, shutil
 
 _pack = struct.pack
 _unpack = struct.unpack
 
 def _droponode(data):
     # used for compatibility for v1
     bits = data.split('\0')
     bits = bits[:-2] + bits[-1:]
     return '\0'.join(bits)
 
 class mergestate(object):
     '''track 3-way merge state of individual files
 
     it is stored on disk when needed. Two file are used, one with an old
     format, one with a new format. Both contains similar data, but the new
     format can store new kind of field.
 
     Current new format is a list of arbitrary record of the form:
 
         [type][length][content]
 
     Type is a single character, length is a 4 bytes integer, content is an
     arbitrary suites of bytes of length `length`.
 
     Type should be a letter. Capital letter are mandatory record, Mercurial
     should abort if they are unknown. lower case record can be safely ignored.
 
     Currently known record:
 
     L: the node of the "local" part of the merge (hexified version)
     O: the node of the "other" part of the merge (hexified version)
     F: a file to be merged entry
     '''
     statepathv1 = 'merge/state'
     statepathv2 = 'merge/state2'
 
     def __init__(self, repo):
         self._repo = repo
         self._dirty = False
         self._read()
 
     def reset(self, node=None, other=None):
         self._state = {}
         self._local = None
         self._other = None
         if node:
             self._local = node
             self._other = other
         shutil.rmtree(self._repo.join('merge'), True)
         self._dirty = False
 
     def _read(self):
         """Analyse each record content to restore a serialized state from disk
 
         This function process "record" entry produced by the de-serialization
         of on disk file.
         """
         self._state = {}
         self._local = None
         self._other = None
         records = self._readrecords()
         for rtype, record in records:
             if rtype == 'L':
                 self._local = bin(record)
             elif rtype == 'O':
                 self._other = bin(record)
             elif rtype == 'F':
                 bits = record.split('\0')
                 self._state[bits[0]] = bits[1:]
             elif not rtype.islower():
                 raise util.Abort(_('unsupported merge state record: %s')
                                    % rtype)
         self._dirty = False
 
     def _readrecords(self):
         """Read merge state from disk and return a list of record (TYPE, data)
 
         We read data from both v1 and v2 files and decide which one to use.
 
         V1 has been used by version prior to 2.9.1 and contains less data than
         v2. We read both versions and check if no data in v2 contradicts
         v1. If there is not contradiction we can safely assume that both v1
         and v2 were written at the same time and use the extract data in v2. If
         there is contradiction we ignore v2 content as we assume an old version
         of Mercurial has overwritten the mergestate file and left an old v2
         file around.
 
         returns list of record [(TYPE, data), ...]"""
         v1records = self._readrecordsv1()
         v2records = self._readrecordsv2()
         oldv2 = set() # old format version of v2 record
         for rec in v2records:
             if rec[0] == 'L':
                 oldv2.add(rec)
             elif rec[0] == 'F':
                 # drop the onode data (not contained in v1)
                 oldv2.add(('F', _droponode(rec[1])))
         for rec in v1records:
             if rec not in oldv2:
                 # v1 file is newer than v2 file, use it
                 # we have to infer the "other" changeset of the merge
                 # we cannot do better than that with v1 of the format
                 mctx = self._repo[None].parents()[-1]
                 v1records.append(('O', mctx.hex()))
                 # add place holder "other" file node information
                 # nobody is using it yet so we do no need to fetch the data
                 # if mctx was wrong `mctx[bits[-2]]` may fails.
                 for idx, r in enumerate(v1records):
                     if r[0] == 'F':
                         bits = r[1].split('\0')
                         bits.insert(-2, '')
                         v1records[idx] = (r[0], '\0'.join(bits))
                 return v1records
         else:
             return v2records
 
     def _readrecordsv1(self):
         """read on disk merge state for version 1 file
 
         returns list of record [(TYPE, data), ...]
 
         Note: the "F" data from this file are one entry short
               (no "other file node" entry)
         """
         records = []
         try:
             f = self._repo.vfs(self.statepathv1)
             for i, l in enumerate(f):
                 if i == 0:
                     records.append(('L', l[:-1]))
                 else:
                     records.append(('F', l[:-1]))
             f.close()
         except IOError, err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     def _readrecordsv2(self):
         """read on disk merge state for version 2 file
 
         returns list of record [(TYPE, data), ...]
         """
         records = []
         try:
             f = self._repo.vfs(self.statepathv2)
             data = f.read()
             off = 0
             end = len(data)
             while off < end:
                 rtype = data[off]
                 off += 1
                 length = _unpack('>I', data[off:(off + 4)])[0]
                 off += 4
                 record = data[off:(off + length)]
                 off += length
                 records.append((rtype, record))
             f.close()
         except IOError, err:
             if err.errno != errno.ENOENT:
                 raise
         return records
 
     def active(self):
         """Whether mergestate is active.
 
         Returns True if there appears to be mergestate. This is a rough proxy
         for "is a merge in progress."
         """
         # Check local variables before looking at filesystem for performance
         # reasons.
         return bool(self._local) or bool(self._state) or \
                self._repo.vfs.exists(self.statepathv1) or \
                self._repo.vfs.exists(self.statepathv2)
 
     def commit(self):
         """Write current state on disk (if necessary)"""
         if self._dirty:
             records = []
             records.append(('L', hex(self._local)))
             records.append(('O', hex(self._other)))
             for d, v in self._state.iteritems():
                 records.append(('F', '\0'.join([d] + v)))
             self._writerecords(records)
             self._dirty = False
 
     def _writerecords(self, records):
         """Write current state on disk (both v1 and v2)"""
         self._writerecordsv1(records)
         self._writerecordsv2(records)
 
     def _writerecordsv1(self, records):
         """Write current state on disk in a version 1 file"""
         f = self._repo.vfs(self.statepathv1, 'w')
         irecords = iter(records)
         lrecords = irecords.next()
         assert lrecords[0] == 'L'
         f.write(hex(self._local) + '\n')
         for rtype, data in irecords:
             if rtype == 'F':
                 f.write('%s\n' % _droponode(data))
         f.close()
 
     def _writerecordsv2(self, records):
         """Write current state on disk in a version 2 file"""
         f = self._repo.vfs(self.statepathv2, 'w')
         for key, data in records:
             assert len(key) == 1
             format = '>sI%is' % len(data)
             f.write(_pack(format, key, len(data), data))
         f.close()
 
     def add(self, fcl, fco, fca, fd):
         """add a new (potentially?) conflicting file the merge state
         fcl: file context for local,
         fco: file context for remote,
         fca: file context for ancestors,
         fd:  file path of the resulting merge.
 
         note: also write the local version to the `.hg/merge` directory.
         """
         hash = util.sha1(fcl.path()).hexdigest()
         self._repo.vfs.write('merge/' + hash, fcl.data())
         self._state[fd] = ['u', hash, fcl.path(),
                            fca.path(), hex(fca.filenode()),
                            fco.path(), hex(fco.filenode()),
                            fcl.flags()]
         self._dirty = True
 
     def __contains__(self, dfile):
         return dfile in self._state
 
     def __getitem__(self, dfile):
         return self._state[dfile][0]
 
     def __iter__(self):
         return iter(sorted(self._state))
 
     def files(self):
         return self._state.keys()
 
     def mark(self, dfile, state):
         self._state[dfile][0] = state
         self._dirty = True
 
     def unresolved(self):
         """Obtain the paths of unresolved files."""
 
         for f, entry in self._state.items():
             if entry[0] == 'u':
                 yield f
 
     def resolve(self, dfile, wctx, labels=None):
         """rerun merge process for file path `dfile`"""
         if self[dfile] == 'r':
             return 0
         stateentry = self._state[dfile]
         state, hash, lfile, afile, anode, ofile, onode, flags = stateentry
         octx = self._repo[self._other]
         fcd = wctx[dfile]
         fco = octx[ofile]
         fca = self._repo.filectx(afile, fileid=anode)
         # "premerge" x flags
         flo = fco.flags()
         fla = fca.flags()
         if 'x' in flags + flo + fla and 'l' not in flags + flo + fla:
             if fca.node() == nullid:
                 self._repo.ui.warn(_('warning: cannot merge flags for %s\n') %
                                    afile)
             elif flags == fla:
                 flags = flo
         # restore local
         f = self._repo.vfs('merge/' + hash)
         self._repo.wwrite(dfile, f.read(), flags)
         f.close()
         r = filemerge.filemerge(self._repo, self._local, lfile, fcd, fco, fca,
                                 labels=labels)
         if r is None:
             # no real conflict
             del self._state[dfile]
             self._dirty = True
         elif not r:
             self.mark(dfile, 'r')
         return r
 
 def _checkunknownfile(repo, wctx, mctx, f, f2=None):
     if f2 is None:
         f2 = f
     return (os.path.isfile(repo.wjoin(f))
         and repo.wvfs.audit.check(f)
         and repo.dirstate.normalize(f) not in repo.dirstate
         and mctx[f2].cmp(wctx[f]))
 
 def _checkunknownfiles(repo, wctx, mctx, force, actions):
     """
     Considers any actions that care about the presence of conflicting unknown
     files. For some actions, the result is to abort; for others, it is to
     choose a different action.
     """
     aborts = []
     if not force:
         for f, (m, args, msg) in actions.iteritems():
             if m in ('c', 'dc'):
                 if _checkunknownfile(repo, wctx, mctx, f):
                     aborts.append(f)
             elif m == 'dg':
                 if _checkunknownfile(repo, wctx, mctx, f, args[0]):
                     aborts.append(f)
 
     for f in sorted(aborts):
         repo.ui.warn(_("%s: untracked file differs\n") % f)
     if aborts:
         raise util.Abort(_("untracked files in working directory differ "
                            "from files in requested revision"))
 
     for f, (m, args, msg) in actions.iteritems():
         if m == 'c':
             actions[f] = ('g', args, msg)
         elif m == 'cm':
             fl2, anc = args
             different = _checkunknownfile(repo, wctx, mctx, f)
             if different:
                 actions[f] = ('m', (f, f, None, False, anc),
                               "remote differs from untracked local")
             else:
                 actions[f] = ('g', (fl2,), "remote created")
 
 def _forgetremoved(wctx, mctx, branchmerge):
     """
     Forget removed files
 
     If we're jumping between revisions (as opposed to merging), and if
     neither the working directory nor the target rev has the file,
     then we need to remove it from the dirstate, to prevent the
     dirstate from listing the file when it is no longer in the
     manifest.
 
     If we're merging, and the other revision has removed a file
     that is not present in the working directory, we need to mark it
     as removed.
     """
 
     actions = {}
     m = 'f'
     if branchmerge:
         m = 'r'
     for f in wctx.deleted():
         if f not in mctx:
             actions[f] = m, None, "forget deleted"
 
     if not branchmerge:
         for f in wctx.removed():
             if f not in mctx:
                 actions[f] = 'f', None, "forget removed"
 
     return actions
 
 def _checkcollision(repo, wmf, actions):
     # build provisional merged manifest up
     pmmf = set(wmf)
 
     if actions:
         # k, dr, e and rd are no-op
         for m in 'a', 'f', 'g', 'cd', 'dc':
             for f, args, msg in actions[m]:
                 pmmf.add(f)
         for f, args, msg in actions['r']:
             pmmf.discard(f)
         for f, args, msg in actions['dm']:
             f2, flags = args
             pmmf.discard(f2)
             pmmf.add(f)
         for f, args, msg in actions['dg']:
             pmmf.add(f)
         for f, args, msg in actions['m']:
             f1, f2, fa, move, anc = args
             if move:
                 pmmf.discard(f1)
             pmmf.add(f)
 
     # check case-folding collision in provisional merged manifest
     foldmap = {}
     for f in sorted(pmmf):
         fold = util.normcase(f)
         if fold in foldmap:
             raise util.Abort(_("case-folding collision between %s and %s")
                              % (f, foldmap[fold]))
         foldmap[fold] = f
 
 def manifestmerge(repo, wctx, p2, pa, branchmerge, force, partial,
                   acceptremote, followcopies):
     """
     Merge p1 and p2 with ancestor pa and generate merge action list
 
     branchmerge and force are as passed in to update
     partial = function to filter file lists
     acceptremote = accept the incoming changes without prompting
     """
 
     copy, movewithdir, diverge, renamedelete = {}, {}, {}, {}
 
     # manifests fetched in order are going to be faster, so prime the caches
     [x.manifest() for x in
      sorted(wctx.parents() + [p2, pa], key=lambda x: x.rev())]
 
     if followcopies:
         ret = copies.mergecopies(repo, wctx, p2, pa)
         copy, movewithdir, diverge, renamedelete = ret
 
     repo.ui.note(_("resolving manifests\n"))
     repo.ui.debug(" branchmerge: %s, force: %s, partial: %s\n"
                   % (bool(branchmerge), bool(force), bool(partial)))
     repo.ui.debug(" ancestor: %s, local: %s, remote: %s\n" % (pa, wctx, p2))
 
     m1, m2, ma = wctx.manifest(), p2.manifest(), pa.manifest()
     copied = set(copy.values())
     copied.update(movewithdir.values())
 
     if '.hgsubstate' in m1:
         # check whether sub state is modified
         for s in sorted(wctx.substate):
             if wctx.sub(s).dirty():
                 m1['.hgsubstate'] += '+'
                 break
 
     # Compare manifests
     diff = m1.diff(m2)
 
     actions = {}
     for f, ((n1, fl1), (n2, fl2)) in diff.iteritems():
         if partial and not partial(f):
             continue
         if n1 and n2: # file exists on both local and remote side
             if f not in ma:
                 fa = copy.get(f, None)
                 if fa is not None:
                     actions[f] = ('m', (f, f, fa, False, pa.node()),
                                   "both renamed from " + fa)
                 else:
                     actions[f] = ('m', (f, f, None, False, pa.node()),
                                   "both created")
             else:
                 a = ma[f]
                 fla = ma.flags(f)
                 nol = 'l' not in fl1 + fl2 + fla
                 if n2 == a and fl2 == fla:
                     actions[f] = ('k' , (), "remote unchanged")
                 elif n1 == a and fl1 == fla: # local unchanged - use remote
                     if n1 == n2: # optimization: keep local content
                         actions[f] = ('e', (fl2,), "update permissions")
                     else:
                         actions[f] = ('g', (fl2,), "remote is newer")
                 elif nol and n2 == a: # remote only changed 'x'
                     actions[f] = ('e', (fl2,), "update permissions")
                 elif nol and n1 == a: # local only changed 'x'
                     actions[f] = ('g', (fl1,), "remote is newer")
                 else: # both changed something
                     actions[f] = ('m', (f, f, f, False, pa.node()),
                                    "versions differ")
         elif n1: # file exists only on local side
             if f in copied:
                 pass # we'll deal with it on m2 side
             elif f in movewithdir: # directory rename, move local
                 f2 = movewithdir[f]
                 if f2 in m2:
                     actions[f2] = ('m', (f, f2, None, True, pa.node()),
                                    "remote directory rename, both created")
                 else:
                     actions[f2] = ('dm', (f, fl1),
                                    "remote directory rename - move from " + f)
             elif f in copy:
                 f2 = copy[f]
                 actions[f] = ('m', (f, f2, f2, False, pa.node()),
                               "local copied/moved from " + f2)
             elif f in ma: # clean, a different, no remote
                 if n1 != ma[f]:
                     if acceptremote:
                         actions[f] = ('r', None, "remote delete")
                     else:
                         actions[f] = ('cd', None,  "prompt changed/deleted")
                 elif n1[20:] == 'a':
                     # This extra 'a' is added by working copy manifest to mark
                     # the file as locally added. We should forget it instead of
                     # deleting it.
                     actions[f] = ('f', None, "remote deleted")
                 else:
                     actions[f] = ('r', None, "other deleted")
         elif n2: # file exists only on remote side
             if f in copied:
                 pass # we'll deal with it on m1 side
             elif f in movewithdir:
                 f2 = movewithdir[f]
                 if f2 in m1:
                     actions[f2] = ('m', (f2, f, None, False, pa.node()),
                                    "local directory rename, both created")
                 else:
                     actions[f2] = ('dg', (f, fl2),
                                    "local directory rename - get from " + f)
             elif f in copy:
                 f2 = copy[f]
                 if f2 in m2:
                     actions[f] = ('m', (f2, f, f2, False, pa.node()),
                                   "remote copied from " + f2)
                 else:
                     actions[f] = ('m', (f2, f, f2, True, pa.node()),
                                   "remote moved from " + f2)
             elif f not in ma:
                 # local unknown, remote created: the logic is described by the
                 # following table:
                 #
                 # force  branchmerge  different  |  action
                 #   n         *           *      |   create
                 #   y         n           *      |   create
                 #   y         y           n      |   create
                 #   y         y           y      |   merge
                 #
                 # Checking whether the files are different is expensive, so we
                 # don't do that when we can avoid it.
                 if not force:
                     actions[f] = ('c', (fl2,), "remote created")
                 elif not branchmerge:
                     actions[f] = ('c', (fl2,), "remote created")
                 else:
                     actions[f] = ('cm', (fl2, pa.node()),
                                   "remote created, get or merge")
             elif n2 != ma[f]:
                 if acceptremote:
                     actions[f] = ('c', (fl2,), "remote recreating")
                 else:
                     actions[f] = ('dc', (fl2,), "prompt deleted/changed")
 
     return actions, diverge, renamedelete
 
 def _resolvetrivial(repo, wctx, mctx, ancestor, actions):
     """Resolves false conflicts where the nodeid changed but the content
        remained the same."""
 
     for f, (m, args, msg) in actions.items():
         if m == 'cd' and f in ancestor and not wctx[f].cmp(ancestor[f]):
             # local did change but ended up with same content
             actions[f] = 'r', None, "prompt same"
         elif m == 'dc' and f in ancestor and not mctx[f].cmp(ancestor[f]):
             # remote did change but ended up with same content
             del actions[f] # don't get = keep local deleted
 
 def calculateupdates(repo, wctx, mctx, ancestors, branchmerge, force, partial,
                      acceptremote, followcopies):
     "Calculate the actions needed to merge mctx into wctx using ancestors"
 
     if len(ancestors) == 1: # default
         actions, diverge, renamedelete = manifestmerge(
             repo, wctx, mctx, ancestors[0], branchmerge, force, partial,
             acceptremote, followcopies)
         _checkunknownfiles(repo, wctx, mctx, force, actions)
 
     else: # only when merge.preferancestor=* - the default
         repo.ui.note(
             _("note: merging %s and %s using bids from ancestors %s\n") %
             (wctx, mctx, _(' and ').join(str(anc) for anc in ancestors)))
 
         # Call for bids
         fbids = {} # mapping filename to bids (action method to list af actions)
         diverge, renamedelete = None, None
         for ancestor in ancestors:
             repo.ui.note(_('\ncalculating bids for ancestor %s\n') % ancestor)
             actions, diverge1, renamedelete1 = manifestmerge(
                 repo, wctx, mctx, ancestor, branchmerge, force, partial,
                 acceptremote, followcopies)
             _checkunknownfiles(repo, wctx, mctx, force, actions)
             if diverge is None: # and renamedelete is None.
                 # Arbitrarily pick warnings from first iteration
                 diverge = diverge1
                 renamedelete = renamedelete1
             for f, a in sorted(actions.iteritems()):
                 m, args, msg = a
                 repo.ui.debug(' %s: %s -> %s\n' % (f, msg, m))
                 if f in fbids:
                     d = fbids[f]
                     if m in d:
                         d[m].append(a)
                     else:
                         d[m] = [a]
                 else:
                     fbids[f] = {m: [a]}
 
         # Pick the best bid for each file
         repo.ui.note(_('\nauction for merging merge bids\n'))
         actions = {}
         for f, bids in sorted(fbids.items()):
             # bids is a mapping from action method to list af actions
             # Consensus?
             if len(bids) == 1: # all bids are the same kind of method
                 m, l = bids.items()[0]
                 if util.all(a == l[0] for a in l[1:]): # len(bids) is > 1
                     repo.ui.note(" %s: consensus for %s\n" % (f, m))
                     actions[f] = l[0]
                     continue
             # If keep is an option, just do it.
             if 'k' in bids:
                 repo.ui.note(" %s: picking 'keep' action\n" % f)
                 actions[f] = bids['k'][0]
                 continue
             # If there are gets and they all agree [how could they not?], do it.
             if 'g' in bids:
                 ga0 = bids['g'][0]
                 if util.all(a == ga0 for a in bids['g'][1:]):
                     repo.ui.note(" %s: picking 'get' action\n" % f)
                     actions[f] = ga0
                     continue
             # TODO: Consider other simple actions such as mode changes
             # Handle inefficient democrazy.
             repo.ui.note(_(' %s: multiple bids for merge action:\n') % f)
             for m, l in sorted(bids.items()):
                 for _f, args, msg in l:
                     repo.ui.note('  %s -> %s\n' % (msg, m))
             # Pick random action. TODO: Instead, prompt user when resolving
             m, l = bids.items()[0]
             repo.ui.warn(_(' %s: ambiguous merge - picked %s action\n') %
                          (f, m))
             actions[f] = l[0]
             continue
         repo.ui.note(_('end of auction\n\n'))
 
     _resolvetrivial(repo, wctx, mctx, ancestors[0], actions)
 
     if wctx.rev() is None:
         fractions = _forgetremoved(wctx, mctx, branchmerge)
         actions.update(fractions)
 
     return actions, diverge, renamedelete
 
 def batchremove(repo, actions):
     """apply removes to the working directory
 
     yields tuples for progress updates
     """
     verbose = repo.ui.verbose
     unlink = util.unlinkpath
     wjoin = repo.wjoin
     audit = repo.wvfs.audit
     i = 0
     for f, args, msg in actions:
         repo.ui.debug(" %s: %s -> r\n" % (f, msg))
         if verbose:
             repo.ui.note(_("removing %s\n") % f)
         audit(f)
         try:
             unlink(wjoin(f), ignoremissing=True)
         except OSError, inst:
             repo.ui.warn(_("update failed to remove %s: %s!\n") %
                          (f, inst.strerror))
         if i == 100:
             yield i, f
             i = 0
         i += 1
     if i > 0:
         yield i, f
 
 def batchget(repo, mctx, actions):
     """apply gets to the working directory
 
     mctx is the context to get from
 
     yields tuples for progress updates
     """
     verbose = repo.ui.verbose
     fctx = mctx.filectx
     wwrite = repo.wwrite
     i = 0
     for f, args, msg in actions:
         repo.ui.debug(" %s: %s -> g\n" % (f, msg))
         if verbose:
             repo.ui.note(_("getting %s\n") % f)
         wwrite(f, fctx(f).data(), args[0])
         if i == 100:
             yield i, f
             i = 0
         i += 1
     if i > 0:
         yield i, f
 
 def applyupdates(repo, actions, wctx, mctx, overwrite, labels=None):
     """apply the merge action list to the working directory
 
     wctx is the working copy context
     mctx is the context to be merged into the working copy
 
     Return a tuple of counts (updated, merged, removed, unresolved) that
     describes how many files were affected by the update.
     """
 
     updated, merged, removed, unresolved = 0, 0, 0, 0
     ms = mergestate(repo)
     ms.reset(wctx.p1().node(), mctx.node())
     moves = []
     for m, l in actions.items():
         l.sort()
 
     # prescan for merges
     for f, args, msg in actions['m']:
         f1, f2, fa, move, anc = args
         if f == '.hgsubstate': # merged internally
             continue
         repo.ui.debug(" preserving %s for resolve of %s\n" % (f1, f))
         fcl = wctx[f1]
         fco = mctx[f2]
         actx = repo[anc]
         if fa in actx:
             fca = actx[fa]
         else:
             fca = repo.filectx(f1, fileid=nullrev)
         ms.add(fcl, fco, fca, f)
         if f1 != f and move:
             moves.append(f1)
 
     audit = repo.wvfs.audit
     _updating = _('updating')
     _files = _('files')
     progress = repo.ui.progress
 
     # remove renamed files after safely stored
     for f in moves:
         if os.path.lexists(repo.wjoin(f)):
             repo.ui.debug("removing %s\n" % f)
             audit(f)
             util.unlinkpath(repo.wjoin(f))
 
     numupdates = sum(len(l) for m, l in actions.items() if m != 'k')
 
     def dirtysubstate():
         # mark '.hgsubstate' as possibly dirty forcibly, because
         # modified '.hgsubstate' is misunderstood as clean,
         # when both st_size/st_mtime of '.hgsubstate' aren't changed,
         # even if "submerge" fails and '.hgsubstate' is inconsistent
         repo.dirstate.normallookup('.hgsubstate')
 
     if [a for a in actions['r'] if a[0] == '.hgsubstate']:
         dirtysubstate()
         subrepo.submerge(repo, wctx, mctx, wctx, overwrite)
 
     # remove in parallel (must come first)
     z = 0
     prog = worker.worker(repo.ui, 0.001, batchremove, (repo,), actions['r'])
     for i, item in prog:
         z += i
         progress(_updating, z, item=item, total=numupdates, unit=_files)
     removed = len(actions['r'])
 
     # get in parallel
     prog = worker.worker(repo.ui, 0.001, batchget, (repo, mctx), actions['g'])
     for i, item in prog:
         z += i
         progress(_updating, z, item=item, total=numupdates, unit=_files)
     updated = len(actions['g'])
 
     if [a for a in actions['g'] if a[0] == '.hgsubstate']:
         dirtysubstate()
         subrepo.submerge(repo, wctx, mctx, wctx, overwrite)
 
     # forget (manifest only, just log it) (must come first)
     for f, args, msg in actions['f']:
         repo.ui.debug(" %s: %s -> f\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
 
     # re-add (manifest only, just log it)
     for f, args, msg in actions['a']:
         repo.ui.debug(" %s: %s -> a\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
 
     # keep (noop, just log it)
     for f, args, msg in actions['k']:
         repo.ui.debug(" %s: %s -> k\n" % (f, msg))
         # no progress
 
     # merge
     for f, args, msg in actions['m']:
         repo.ui.debug(" %s: %s -> m\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
         if f == '.hgsubstate': # subrepo states need updating
             dirtysubstate()
             subrepo.submerge(repo, wctx, mctx, wctx.ancestor(mctx),
                              overwrite)
             continue
         audit(f)
         r = ms.resolve(f, wctx, labels=labels)
         if r is not None and r > 0:
             unresolved += 1
         else:
             if r is None:
                 updated += 1
             else:
                 merged += 1
 
     # directory rename, move local
     for f, args, msg in actions['dm']:
         repo.ui.debug(" %s: %s -> dm\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
         f0, flags = args
         repo.ui.note(_("moving %s to %s\n") % (f0, f))
         audit(f)
         repo.wwrite(f, wctx.filectx(f0).data(), flags)
         util.unlinkpath(repo.wjoin(f0))
         updated += 1
 
     # local directory rename, get
     for f, args, msg in actions['dg']:
         repo.ui.debug(" %s: %s -> dg\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
         f0, flags = args
         repo.ui.note(_("getting %s to %s\n") % (f0, f))
         repo.wwrite(f, mctx.filectx(f0).data(), flags)
         updated += 1
 
     # exec
     for f, args, msg in actions['e']:
         repo.ui.debug(" %s: %s -> e\n" % (f, msg))
         z += 1
         progress(_updating, z, item=f, total=numupdates, unit=_files)
         flags, = args
         audit(f)
         util.setflags(repo.wjoin(f), 'l' in flags, 'x' in flags)
         updated += 1
 
     ms.commit()
     progress(_updating, None, total=numupdates, unit=_files)
 
     return updated, merged, removed, unresolved
 
 def recordupdates(repo, actions, branchmerge):
     "record merge actions to the dirstate"
     # remove (must come first)
     for f, args, msg in actions['r']:
         if branchmerge:
             repo.dirstate.remove(f)
         else:
             repo.dirstate.drop(f)
 
     # forget (must come first)
     for f, args, msg in actions['f']:
         repo.dirstate.drop(f)
 
     # re-add
     for f, args, msg in actions['a']:
         if not branchmerge:
             repo.dirstate.add(f)
 
     # exec change
     for f, args, msg in actions['e']:
         repo.dirstate.normallookup(f)
 
     # keep
     for f, args, msg in actions['k']:
         pass
 
     # get
     for f, args, msg in actions['g']:
         if branchmerge:
             repo.dirstate.otherparent(f)
         else:
             repo.dirstate.normal(f)
 
     # merge
     for f, args, msg in actions['m']:
         f1, f2, fa, move, anc = args
         if branchmerge:
             # We've done a branch merge, mark this file as merged
             # so that we properly record the merger later
             repo.dirstate.merge(f)
             if f1 != f2: # copy/rename
                 if move:
                     repo.dirstate.remove(f1)
                 if f1 != f:
                     repo.dirstate.copy(f1, f)
                 else:
                     repo.dirstate.copy(f2, f)
         else:
             # We've update-merged a locally modified file, so
             # we set the dirstate to emulate a normal checkout
             # of that file some time in the past. Thus our
             # merge will appear as a normal local file
             # modification.
             if f2 == f: # file not locally copied/moved
                 repo.dirstate.normallookup(f)
             if move:
                 repo.dirstate.drop(f1)
 
     # directory rename, move local
     for f, args, msg in actions['dm']:
         f0, flag = args
         if branchmerge:
             repo.dirstate.add(f)
             repo.dirstate.remove(f0)
             repo.dirstate.copy(f0, f)
         else:
             repo.dirstate.normal(f)
             repo.dirstate.drop(f0)
 
     # directory rename, get
     for f, args, msg in actions['dg']:
         f0, flag = args
         if branchmerge:
             repo.dirstate.add(f)
             repo.dirstate.copy(f0, f)
         else:
             repo.dirstate.normal(f)
 
 def update(repo, node, branchmerge, force, partial, ancestor=None,
            mergeancestor=False, labels=None):
     """
     Perform a merge between the working directory and the given node
 
     node = the node to update to, or None if unspecified
     branchmerge = whether to merge between branches
     force = whether to force branch merging or file overwriting
     partial = a function to filter file lists (dirstate not updated)
     mergeancestor = whether it is merging with an ancestor. If true,
       we should accept the incoming changes for any prompts that occur.
       If false, merging with an ancestor (fast-forward) is only allowed
       between different named branches. This flag is used by rebase extension
       as a temporary fix and should be avoided in general.
 
     The table below shows all the behaviors of the update command
     given the -c and -C or no options, whether the working directory
     is dirty, whether a revision is specified, and the relationship of
     the parent rev to the target rev (linear, on the same named
     branch, or on another named branch).
 
     This logic is tested by test-update-branches.t.
 
     -c  -C  dirty  rev  |  linear   same  cross
      n   n    n     n   |    ok     (1)     x
      n   n    n     y   |    ok     ok     ok
      n   n    y     n   |   merge   (2)    (2)
      n   n    y     y   |   merge   (3)    (3)
      n   y    *     *   |    ---  discard  ---
      y   n    y     *   |    ---    (4)    ---
      y   n    n     *   |    ---    ok     ---
      y   y    *     *   |    ---    (5)    ---
 
     x = can't happen
     * = don't-care
     1 = abort: not a linear update (merge or update --check to force update)
     2 = abort: uncommitted changes (commit and merge, or update --clean to
                  discard changes)
     3 = abort: uncommitted changes (commit or update --clean to discard changes)
     4 = abort: uncommitted changes (checked in commands.py)
     5 = incompatible options (checked in commands.py)
 
     Return the same tuple as applyupdates().
     """
 
     onode = node
     wlock = repo.wlock()
     try:
         wc = repo[None]
         pl = wc.parents()
         p1 = pl[0]
         pas = [None]
         if ancestor is not None:
             pas = [repo[ancestor]]
 
         if node is None:
             # Here is where we should consider bookmarks, divergent bookmarks,
             # foreground changesets (successors), and tip of current branch;
             # but currently we are only checking the branch tips.
             try:
                 node = repo.branchtip(wc.branch())
             except errormod.RepoLookupError:
                 if wc.branch() == 'default': # no default branch!
                     node = repo.lookup('tip') # update to tip
                 else:
                     raise util.Abort(_("branch %s not found") % wc.branch())
 
             if p1.obsolete() and not p1.children():
                 # allow updating to successors
                 successors = obsolete.successorssets(repo, p1.node())
 
                 # behavior of certain cases is as follows,
                 #
                 # divergent changesets: update to highest rev, similar to what
                 #     is currently done when there are more than one head
                 #     (i.e. 'tip')
                 #
                 # replaced changesets: same as divergent except we know there
                 # is no conflict
                 #
                 # pruned changeset: no update is done; though, we could
                 #     consider updating to the first non-obsolete parent,
                 #     similar to what is current done for 'hg prune'
 
                 if successors:
                     # flatten the list here handles both divergent (len > 1)
                     # and the usual case (len = 1)
                     successors = [n for sub in successors for n in sub]
 
                     # get the max revision for the given successors set,
                     # i.e. the 'tip' of a set
                     node = repo.revs('max(%ln)', successors).first()
                     pas = [p1]
 
         overwrite = force and not branchmerge
 
         p2 = repo[node]
         if pas[0] is None:
             if repo.ui.config('merge', 'preferancestor', '*') == '*':
                 cahs = repo.changelog.commonancestorsheads(p1.node(), p2.node())
                 pas = [repo[anc] for anc in (sorted(cahs) or [nullid])]
             else:
                 pas = [p1.ancestor(p2, warn=branchmerge)]
 
         fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2)
 
         ### check phase
         if not overwrite and len(pl) > 1:
             raise util.Abort(_("outstanding uncommitted merge"))
         if branchmerge:
             if pas == [p2]:
                 raise util.Abort(_("merging with a working directory ancestor"
                                    " has no effect"))
             elif pas == [p1]:
                 if not mergeancestor and p1.branch() == p2.branch():
                     raise util.Abort(_("nothing to merge"),
                                      hint=_("use 'hg update' "
                                             "or check 'hg heads'"))
             if not force and (wc.files() or wc.deleted()):
                 raise util.Abort(_("uncommitted changes"),
                                  hint=_("use 'hg status' to list changes"))
             for s in sorted(wc.substate):
                 wc.sub(s).bailifchanged()
 
         elif not overwrite:
             if p1 == p2: # no-op update
                 # call the hooks and exit early
                 repo.hook('preupdate', throw=True, parent1=xp2, parent2='')
                 repo.hook('update', parent1=xp2, parent2='', error=0)
                 return 0, 0, 0, 0
 
             if pas not in ([p1], [p2]):  # nonlinear
                 dirty = wc.dirty(missing=True)
                 if dirty or onode is None:
                     # Branching is a bit strange to ensure we do the minimal
                     # amount of call to obsolete.background.
                     foreground = obsolete.foreground(repo, [p1.node()])
                     # note: the <node> variable contains a random identifier
                     if repo[node].node() in foreground:
                         pas = [p1]  # allow updating to successors
                     elif dirty:
                         msg = _("uncommitted changes")
                         if onode is None:
                             hint = _("commit and merge, or update --clean to"
                                      " discard changes")
                         else:
                             hint = _("commit or update --clean to discard"
                                      " changes")
                         raise util.Abort(msg, hint=hint)
                     else:  # node is none
                         msg = _("not a linear update")
                         hint = _("merge or update --check to force update")
                         raise util.Abort(msg, hint=hint)
                 else:
                     # Allow jumping branches if clean and specific rev given
                     pas = [p1]
 
         followcopies = False
         if overwrite:
             pas = [wc]
         elif pas == [p2]: # backwards
             pas = [wc.p1()]
         elif not branchmerge and not wc.dirty(missing=True):
             pass
         elif pas[0] and repo.ui.configbool('merge', 'followcopies', True):
             followcopies = True
 
         ### calculate phase
         actionbyfile, diverge, renamedelete = calculateupdates(
             repo, wc, p2, pas, branchmerge, force, partial, mergeancestor,
             followcopies)
         # Convert to dictionary-of-lists format
         actions = dict((m, []) for m in 'a f g cd dc r dm dg m e k'.split())
         for f, (m, args, msg) in actionbyfile.iteritems():
             if m not in actions:
                 actions[m] = []
             actions[m].append((f, args, msg))
 
         if not util.checkcase(repo.path):
             # check collision between files only in p2 for clean update
             if (not branchmerge and
                 (force or not wc.dirty(missing=True, branch=False))):
                 _checkcollision(repo, p2.manifest(), None)
             else:
                 _checkcollision(repo, wc.manifest(), actions)
 
         # Prompt and create actions. TODO: Move this towards resolve phase.
         for f, args, msg in sorted(actions['cd']):
             if repo.ui.promptchoice(
                 _("local changed %s which remote deleted\n"
                   "use (c)hanged version or (d)elete?"
                   "$$ &Changed $$ &Delete") % f, 0):
                 actions['r'].append((f, None, "prompt delete"))
             else:
                 actions['a'].append((f, None, "prompt keep"))
         del actions['cd'][:]
 
         for f, args, msg in sorted(actions['dc']):
             flags, = args
             if repo.ui.promptchoice(
                 _("remote changed %s which local deleted\n"
                   "use (c)hanged version or leave (d)eleted?"
                   "$$ &Changed $$ &Deleted") % f, 0) == 0:
                 actions['g'].append((f, (flags,), "prompt recreating"))
         del actions['dc'][:]
 
         ### apply phase
         if not branchmerge: # just jump to the new rev
             fp1, fp2, xp1, xp2 = fp2, nullid, xp2, ''
         if not partial:
             repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2)
             # note that we're in the middle of an update
             repo.vfs.write('updatestate', p2.hex())
 
         stats = applyupdates(repo, actions, wc, p2, overwrite, labels=labels)
 
         # divergent renames
         for f, fl in sorted(diverge.iteritems()):
             repo.ui.warn(_("note: possible conflict - %s was renamed "
                            "multiple times to:\n") % f)
             for nf in fl:
                 repo.ui.warn(" %s\n" % nf)
 
         # rename and delete
         for f, fl in sorted(renamedelete.iteritems()):
             repo.ui.warn(_("note: possible conflict - %s was deleted "
                            "and renamed to:\n") % f)
             for nf in fl:
                 repo.ui.warn(" %s\n" % nf)
 
         if not partial:
             repo.dirstate.beginparentchange()
             repo.setparents(fp1, fp2)
             recordupdates(repo, actions, branchmerge)
             # update completed, clear state
             util.unlink(repo.join('updatestate'))
 
             if not branchmerge:
                 repo.dirstate.setbranch(p2.branch())
             repo.dirstate.endparentchange()
     finally:
         wlock.release()
 
     if not partial:
-        repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3])
+        def updatehook(parent1=xp1, parent2=xp2, error=stats[3]):
+            repo.hook('update', parent1=parent1, parent2=parent2, error=error)
+        repo._afterlock(updatehook)
     return stats
 
 def graft(repo, ctx, pctx, labels):
     """Do a graft-like merge.
 
     This is a merge where the merge ancestor is chosen such that one
     or more changesets are grafted onto the current changeset. In
     addition to the merge, this fixes up the dirstate to include only
     a single parent and tries to duplicate any renames/copies
     appropriately.
 
     ctx - changeset to rebase
     pctx - merge base, usually ctx.p1()
     labels - merge labels eg ['local', 'graft']
 
     """
     # If we're grafting a descendant onto an ancestor, be sure to pass
     # mergeancestor=True to update. This does two things: 1) allows the merge if
     # the destination is the same as the parent of the ctx (so we can use graft
     # to copy commits), and 2) informs update that the incoming changes are
     # newer than the destination so it doesn't prompt about "remote changed foo
     # which local deleted".
     mergeancestor = repo.changelog.isancestor(repo['.'].node(), ctx.node())
 
     stats = update(repo, ctx.node(), True, True, False, pctx.node(),
                    mergeancestor=mergeancestor, labels=labels)
 
     # drop the second merge parent
     repo.dirstate.beginparentchange()
     repo.setparents(repo['.'].node(), nullid)
     repo.dirstate.write()
     # fix up dirstate for copies and renames
     copies.duplicatecopies(repo, ctx.rev(), pctx.rev())
     repo.dirstate.endparentchange()
     return stats

tests/test-hook.t

@@ -1,688 +1,690 b''
 commit hooks can see env vars
 (and post-transaction one are run unlocked)
 
   $ hg init a
   $ cd a
   $ cat > .hg/hgrc <<EOF
   > [hooks]
   > commit = sh -c "HG_LOCAL= HG_TAG= python \"$TESTDIR/printenv.py\" commit"
   > commit.b = sh -c "HG_LOCAL= HG_TAG= python \"$TESTDIR/printenv.py\" commit.b"
   > precommit = sh -c  "HG_LOCAL= HG_NODE= HG_TAG= python \"$TESTDIR/printenv.py\" precommit"
   > pretxncommit = sh -c "HG_LOCAL= HG_TAG= python \"$TESTDIR/printenv.py\" pretxncommit"
   > pretxncommit.tip = hg -q tip
   > pre-identify = python "$TESTDIR/printenv.py" pre-identify 1
   > pre-cat = python "$TESTDIR/printenv.py" pre-cat
   > post-cat = python "$TESTDIR/printenv.py" post-cat
   > pretxnopen = sh -c "HG_LOCAL= HG_TAG= python \"$TESTDIR/printenv.py\" pretxnopen"
   > pretxnclose = sh -c "HG_LOCAL= HG_TAG= python \"$TESTDIR/printenv.py\" pretxnclose"
   > txnclose = sh -c "HG_LOCAL= HG_TAG= python \"$TESTDIR/printenv.py\" txnclose"
   > txnabort = sh -c "HG_LOCAL= HG_TAG= python \"$TESTDIR/printenv.py\" txnabort"
   > txnclose.checklock = sh -c "hg debuglock > /dev/null"
   > EOF
   $ echo a > a
   $ hg add a
   $ hg commit -m a
   precommit hook: HG_PARENT1=0000000000000000000000000000000000000000
   pretxnopen hook: HG_TXNNAME=commit
   pretxncommit hook: HG_NODE=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b HG_PARENT1=0000000000000000000000000000000000000000 HG_PENDING=$TESTTMP/a
   0:cb9a9f314b8b
   pretxnclose hook: HG_PENDING=$TESTTMP/a HG_PHASES_MOVED=1 HG_TXNID=TXN:* HG_XNNAME=commit (glob)
   txnclose hook: HG_PHASES_MOVED=1 HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
   commit hook: HG_NODE=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b HG_PARENT1=0000000000000000000000000000000000000000
   commit.b hook: HG_NODE=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b HG_PARENT1=0000000000000000000000000000000000000000
 
   $ hg clone . ../b
   updating to branch default
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cd ../b
 
 changegroup hooks can see env vars
 
   $ cat > .hg/hgrc <<EOF
   > [hooks]
   > prechangegroup = python "$TESTDIR/printenv.py" prechangegroup
   > changegroup = python "$TESTDIR/printenv.py" changegroup
   > incoming = python "$TESTDIR/printenv.py" incoming
   > EOF
 
 pretxncommit and commit hooks can see both parents of merge
 
   $ cd ../a
   $ echo b >> a
   $ hg commit -m a1 -d "1 0"
   precommit hook: HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
   pretxnopen hook: HG_TXNNAME=commit
   pretxncommit hook: HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b HG_PENDING=$TESTTMP/a
   1:ab228980c14d
   pretxnclose hook: HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_XNNAME=commit (glob)
   txnclose hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
   commit hook: HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
   commit.b hook: HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
   $ hg update -C 0
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo b > b
   $ hg add b
   $ hg commit -m b -d '1 0'
   precommit hook: HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
   pretxnopen hook: HG_TXNNAME=commit
   pretxncommit hook: HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b HG_PENDING=$TESTTMP/a
   2:ee9deb46ab31
   pretxnclose hook: HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_XNNAME=commit (glob)
   txnclose hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
   commit hook: HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
   commit.b hook: HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
   created new head
   $ hg merge 1
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg commit -m merge -d '2 0'
   precommit hook: HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd
   pretxnopen hook: HG_TXNNAME=commit
   pretxncommit hook: HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2 HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd HG_PENDING=$TESTTMP/a
   3:07f3376c1e65
   pretxnclose hook: HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_XNNAME=commit (glob)
   txnclose hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
   commit hook: HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2 HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd
   commit.b hook: HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2 HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd
 
 test generic hooks
 
   $ hg id
   pre-identify hook: HG_ARGS=id HG_OPTS={'bookmarks': None, 'branch': None, 'id': None, 'insecure': None, 'num': None, 'remotecmd': '', 'rev': '', 'ssh': '', 'tags': None} HG_PATS=[]
   abort: pre-identify hook exited with status 1
   [255]
   $ hg cat b
   pre-cat hook: HG_ARGS=cat b HG_OPTS={'decode': None, 'exclude': [], 'include': [], 'output': '', 'rev': ''} HG_PATS=['b']
   b
   post-cat hook: HG_ARGS=cat b HG_OPTS={'decode': None, 'exclude': [], 'include': [], 'output': '', 'rev': ''} HG_PATS=['b'] HG_RESULT=0
 
   $ cd ../b
   $ hg pull ../a
   pulling from ../a
   searching for changes
   prechangegroup hook: HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=file:$TESTTMP/a (glob)
   adding changesets
   adding manifests
   adding file changes
   added 3 changesets with 2 changes to 2 files
   changegroup hook: HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=file:$TESTTMP/a (glob)
   incoming hook: HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=file:$TESTTMP/a (glob)
   incoming hook: HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=file:$TESTTMP/a (glob)
   incoming hook: HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2 HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=file:$TESTTMP/a (glob)
   (run 'hg update' to get a working copy)
 
 tag hooks can see env vars
 
   $ cd ../a
   $ cat >> .hg/hgrc <<EOF
   > pretag = python "$TESTDIR/printenv.py" pretag
   > tag = sh -c "HG_PARENT1= HG_PARENT2= python \"$TESTDIR/printenv.py\" tag"
   > EOF
   $ hg tag -d '3 0' a
   pretag hook: HG_LOCAL=0 HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2 HG_TAG=a
   precommit hook: HG_PARENT1=07f3376c1e655977439df2a814e3cc14b27abac2
   pretxnopen hook: HG_TXNNAME=commit
   pretxncommit hook: HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_PARENT1=07f3376c1e655977439df2a814e3cc14b27abac2 HG_PENDING=$TESTTMP/a
   4:539e4b31b6dc
   pretxnclose hook: HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_XNNAME=commit (glob)
   tag hook: HG_LOCAL=0 HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2 HG_TAG=a
   txnclose hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
   commit hook: HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_PARENT1=07f3376c1e655977439df2a814e3cc14b27abac2
   commit.b hook: HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_PARENT1=07f3376c1e655977439df2a814e3cc14b27abac2
   $ hg tag -l la
   pretag hook: HG_LOCAL=1 HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_TAG=la
   tag hook: HG_LOCAL=1 HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_TAG=la
 
 pretag hook can forbid tagging
 
   $ echo "pretag.forbid = python \"$TESTDIR/printenv.py\" pretag.forbid 1" >> .hg/hgrc
   $ hg tag -d '4 0' fa
   pretag hook: HG_LOCAL=0 HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_TAG=fa
   pretag.forbid hook: HG_LOCAL=0 HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_TAG=fa
   abort: pretag.forbid hook exited with status 1
   [255]
   $ hg tag -l fla
   pretag hook: HG_LOCAL=1 HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_TAG=fla
   pretag.forbid hook: HG_LOCAL=1 HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_TAG=fla
   abort: pretag.forbid hook exited with status 1
   [255]
 
 pretxncommit hook can see changeset, can roll back txn, changeset no
 more there after
 
   $ echo "pretxncommit.forbid0 = hg tip -q" >> .hg/hgrc
   $ echo "pretxncommit.forbid1 = python \"$TESTDIR/printenv.py\" pretxncommit.forbid 1" >> .hg/hgrc
   $ echo z > z
   $ hg add z
   $ hg -q tip
   4:539e4b31b6dc
   $ hg commit -m 'fail' -d '4 0'
   precommit hook: HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
   pretxnopen hook: HG_TXNNAME=commit
   pretxncommit hook: HG_NODE=6f611f8018c10e827fee6bd2bc807f937e761567 HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_PENDING=$TESTTMP/a
   5:6f611f8018c1
   5:6f611f8018c1
   pretxncommit.forbid hook: HG_NODE=6f611f8018c10e827fee6bd2bc807f937e761567 HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_PENDING=$TESTTMP/a
   transaction abort!
   txnabort hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
   rollback completed
   abort: pretxncommit.forbid1 hook exited with status 1
   [255]
   $ hg -q tip
   4:539e4b31b6dc
 
 (Check that no 'changelog.i.a' file were left behind)
 
   $ ls -1 .hg/store/
   00changelog.i
   00manifest.i
   data
   fncache
   journal.phaseroots
   phaseroots
   undo
   undo.backup.fncache
   undo.backupfiles
   undo.phaseroots
 
 
 precommit hook can prevent commit
 
   $ echo "precommit.forbid = python \"$TESTDIR/printenv.py\" precommit.forbid 1" >> .hg/hgrc
   $ hg commit -m 'fail' -d '4 0'
   precommit hook: HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
   precommit.forbid hook: HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
   abort: precommit.forbid hook exited with status 1
   [255]
   $ hg -q tip
   4:539e4b31b6dc
 
 preupdate hook can prevent update
 
   $ echo "preupdate = python \"$TESTDIR/printenv.py\" preupdate" >> .hg/hgrc
   $ hg update 1
   preupdate hook: HG_PARENT1=ab228980c14d
   0 files updated, 0 files merged, 2 files removed, 0 files unresolved
 
 update hook
 
   $ echo "update = python \"$TESTDIR/printenv.py\" update" >> .hg/hgrc
   $ hg update
   preupdate hook: HG_PARENT1=539e4b31b6dc
   update hook: HG_ERROR=0 HG_PARENT1=539e4b31b6dc
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 pushkey hook
 
   $ echo "pushkey = python \"$TESTDIR/printenv.py\" pushkey" >> .hg/hgrc
   $ cd ../b
   $ hg bookmark -r null foo
   $ hg push -B foo ../a
   pushing to ../a
   searching for changes
   no changes found
   pretxnopen hook: HG_TXNNAME=bookmarks
   pretxnclose hook: HG_BOOKMARK_MOVED=1 HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_XNNAME=bookmarks (glob)
   txnclose hook: HG_BOOKMARK_MOVED=1 HG_TXNID=TXN:* HG_TXNNAME=bookmarks (glob)
   pushkey hook: HG_KEY=foo HG_NAMESPACE=bookmarks HG_NEW=0000000000000000000000000000000000000000 HG_RET=1
   exporting bookmark foo
   [1]
   $ cd ../a
 
 listkeys hook
 
   $ echo "listkeys = python \"$TESTDIR/printenv.py\" listkeys" >> .hg/hgrc
   $ hg bookmark -r null bar
   $ cd ../b
   $ hg pull -B bar ../a
   pulling from ../a
   listkeys hook: HG_NAMESPACE=bookmarks HG_VALUES={'bar': '0000000000000000000000000000000000000000', 'foo': '0000000000000000000000000000000000000000'}
   listkeys hook: HG_NAMESPACE=bookmarks HG_VALUES={'bar': '0000000000000000000000000000000000000000', 'foo': '0000000000000000000000000000000000000000'}
   no changes found
   listkeys hook: HG_NAMESPACE=phases HG_VALUES={'cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b': '1', 'publishing': 'True'}
   adding remote bookmark bar
   $ cd ../a
 
 test that prepushkey can prevent incoming keys
 
   $ echo "prepushkey = python \"$TESTDIR/printenv.py\" prepushkey.forbid 1" >> .hg/hgrc
   $ cd ../b
   $ hg bookmark -r null baz
   $ hg push -B baz ../a
   pushing to ../a
   searching for changes
   listkeys hook: HG_NAMESPACE=phases HG_VALUES={'cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b': '1', 'publishing': 'True'}
   listkeys hook: HG_NAMESPACE=bookmarks HG_VALUES={'bar': '0000000000000000000000000000000000000000', 'foo': '0000000000000000000000000000000000000000'}
   no changes found
   listkeys hook: HG_NAMESPACE=phases HG_VALUES={'cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b': '1', 'publishing': 'True'}
   prepushkey.forbid hook: HG_KEY=baz HG_NAMESPACE=bookmarks HG_NEW=0000000000000000000000000000000000000000
   pushkey-abort: prepushkey hook exited with status 1
   exporting bookmark baz failed!
   [1]
   $ cd ../a
 
 test that prelistkeys can prevent listing keys
 
   $ echo "prelistkeys = python \"$TESTDIR/printenv.py\" prelistkeys.forbid 1" >> .hg/hgrc
   $ hg bookmark -r null quux
   $ cd ../b
   $ hg pull -B quux ../a
   pulling from ../a
   prelistkeys.forbid hook: HG_NAMESPACE=bookmarks
   abort: prelistkeys hook exited with status 1
   [255]
   $ cd ../a
   $ rm .hg/hgrc
 
 prechangegroup hook can prevent incoming changes
 
   $ cd ../b
   $ hg -q tip
   3:07f3376c1e65
   $ cat > .hg/hgrc <<EOF
   > [hooks]
   > prechangegroup.forbid = python "$TESTDIR/printenv.py" prechangegroup.forbid 1
   > EOF
   $ hg pull ../a
   pulling from ../a
   searching for changes
   prechangegroup.forbid hook: HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=file:$TESTTMP/a (glob)
   abort: prechangegroup.forbid hook exited with status 1
   [255]
 
 pretxnchangegroup hook can see incoming changes, can roll back txn,
 incoming changes no longer there after
 
   $ cat > .hg/hgrc <<EOF
   > [hooks]
   > pretxnchangegroup.forbid0 = hg tip -q
   > pretxnchangegroup.forbid1 = python "$TESTDIR/printenv.py" pretxnchangegroup.forbid 1
   > EOF
   $ hg pull ../a
   pulling from ../a
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   4:539e4b31b6dc
   pretxnchangegroup.forbid hook: HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_PENDING=$TESTTMP/b HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=file:$TESTTMP/a (glob)
   transaction abort!
   rollback completed
   abort: pretxnchangegroup.forbid1 hook exited with status 1
   [255]
   $ hg -q tip
   3:07f3376c1e65
 
 outgoing hooks can see env vars
 
   $ rm .hg/hgrc
   $ cat > ../a/.hg/hgrc <<EOF
   > [hooks]
   > preoutgoing = python "$TESTDIR/printenv.py" preoutgoing
   > outgoing = python "$TESTDIR/printenv.py" outgoing
   > EOF
   $ hg pull ../a
   pulling from ../a
   searching for changes
   preoutgoing hook: HG_SOURCE=pull
   adding changesets
   outgoing hook: HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_SOURCE=pull
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   adding remote bookmark quux
   (run 'hg update' to get a working copy)
   $ hg rollback
   repository tip rolled back to revision 3 (undo pull)
 
 preoutgoing hook can prevent outgoing changes
 
   $ echo "preoutgoing.forbid = python \"$TESTDIR/printenv.py\" preoutgoing.forbid 1" >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
   preoutgoing hook: HG_SOURCE=pull
   preoutgoing.forbid hook: HG_SOURCE=pull
   abort: preoutgoing.forbid hook exited with status 1
   [255]
 
 outgoing hooks work for local clones
 
   $ cd ..
   $ cat > a/.hg/hgrc <<EOF
   > [hooks]
   > preoutgoing = python "$TESTDIR/printenv.py" preoutgoing
   > outgoing = python "$TESTDIR/printenv.py" outgoing
   > EOF
   $ hg clone a c
   preoutgoing hook: HG_SOURCE=clone
   outgoing hook: HG_NODE=0000000000000000000000000000000000000000 HG_SOURCE=clone
   updating to branch default
   3 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ rm -rf c
 
 preoutgoing hook can prevent outgoing changes for local clones
 
   $ echo "preoutgoing.forbid = python \"$TESTDIR/printenv.py\" preoutgoing.forbid 1" >> a/.hg/hgrc
   $ hg clone a zzz
   preoutgoing hook: HG_SOURCE=clone
   preoutgoing.forbid hook: HG_SOURCE=clone
   abort: preoutgoing.forbid hook exited with status 1
   [255]
 
   $ cd "$TESTTMP/b"
 
   $ cat > hooktests.py <<EOF
   > from mercurial import util
   > 
   > uncallable = 0
   > 
   > def printargs(args):
   >     args.pop('ui', None)
   >     args.pop('repo', None)
   >     a = list(args.items())
   >     a.sort()
   >     print 'hook args:'
   >     for k, v in a:
   >        print ' ', k, v
   > 
   > def passhook(**args):
   >     printargs(args)
   > 
   > def failhook(**args):
   >     printargs(args)
   >     return True
   > 
   > class LocalException(Exception):
   >     pass
   > 
   > def raisehook(**args):
   >     raise LocalException('exception from hook')
   > 
   > def aborthook(**args):
   >     raise util.Abort('raise abort from hook')
   > 
   > def brokenhook(**args):
   >     return 1 + {}
   > 
   > def verbosehook(ui, **args):
   >     ui.note('verbose output from hook\n')
   > 
   > def printtags(ui, repo, **args):
   >     print sorted(repo.tags())
   > 
   > class container:
   >     unreachable = 1
   > EOF
 
 test python hooks
 
 #if windows
   $ PYTHONPATH="$TESTTMP/b;$PYTHONPATH"
 #else
   $ PYTHONPATH="$TESTTMP/b:$PYTHONPATH"
 #endif
   $ export PYTHONPATH
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.broken = python:hooktests.brokenhook' >> ../a/.hg/hgrc
   $ hg pull ../a 2>&1 | grep 'raised an exception'
   error: preoutgoing.broken hook raised an exception: unsupported operand type(s) for +: 'int' and 'dict'
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.raise = python:hooktests.raisehook' >> ../a/.hg/hgrc
   $ hg pull ../a 2>&1 | grep 'raised an exception'
   error: preoutgoing.raise hook raised an exception: exception from hook
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.abort = python:hooktests.aborthook' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
   error: preoutgoing.abort hook failed: raise abort from hook
   abort: raise abort from hook
   [255]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.fail = python:hooktests.failhook' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
   hook args:
     hooktype preoutgoing
     source pull
   abort: preoutgoing.fail hook failed
   [255]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.uncallable = python:hooktests.uncallable' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
   abort: preoutgoing.uncallable hook is invalid ("hooktests.uncallable" is not callable)
   [255]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.nohook = python:hooktests.nohook' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
   abort: preoutgoing.nohook hook is invalid ("hooktests.nohook" is not defined)
   [255]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.nomodule = python:nomodule' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
   abort: preoutgoing.nomodule hook is invalid ("nomodule" not in a module)
   [255]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.badmodule = python:nomodule.nowhere' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
   abort: preoutgoing.badmodule hook is invalid (import of "nomodule" failed)
   [255]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.unreachable = python:hooktests.container.unreachable' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
   abort: preoutgoing.unreachable hook is invalid (import of "hooktests.container" failed)
   [255]
 
   $ echo '[hooks]' > ../a/.hg/hgrc
   $ echo 'preoutgoing.pass = python:hooktests.passhook' >> ../a/.hg/hgrc
   $ hg pull ../a
   pulling from ../a
   searching for changes
   hook args:
     hooktype preoutgoing
     source pull
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   adding remote bookmark quux
   (run 'hg update' to get a working copy)
 
 make sure --traceback works
 
   $ echo '[hooks]' > .hg/hgrc
   $ echo 'commit.abort = python:hooktests.aborthook' >> .hg/hgrc
 
   $ echo aa > a
   $ hg --traceback commit -d '0 0' -ma 2>&1 | grep '^Traceback'
   Traceback (most recent call last):
 
   $ cd ..
   $ hg init c
   $ cd c
 
   $ cat > hookext.py <<EOF
   > def autohook(**args):
   >     print "Automatically installed hook"
   > 
   > def reposetup(ui, repo):
   >     repo.ui.setconfig("hooks", "commit.auto", autohook)
   > EOF
   $ echo '[extensions]' >> .hg/hgrc
   $ echo 'hookext = hookext.py' >> .hg/hgrc
 
   $ touch foo
   $ hg add foo
   $ hg ci -d '0 0' -m 'add foo'
   Automatically installed hook
   $ echo >> foo
   $ hg ci --debug -d '0 0' -m 'change foo'
   committing files:
   foo
   committing manifest
   committing changelog
   calling hook commit.auto: hgext_hookext.autohook
   Automatically installed hook
   committed changeset 1:52998019f6252a2b893452765fcb0a47351a5708
 
   $ hg showconfig hooks
   hooks.commit.auto=<function autohook at *> (glob)
 
 test python hook configured with python:[file]:[hook] syntax
 
   $ cd ..
   $ mkdir d
   $ cd d
   $ hg init repo
   $ mkdir hooks
 
   $ cd hooks
   $ cat > testhooks.py <<EOF
   > def testhook(**args):
   >     print 'hook works'
   > EOF
   $ echo '[hooks]' > ../repo/.hg/hgrc
   $ echo "pre-commit.test = python:`pwd`/testhooks.py:testhook" >> ../repo/.hg/hgrc
 
   $ cd ../repo
   $ hg commit -d '0 0'
   hook works
   nothing changed
   [1]
 
   $ echo '[hooks]' > .hg/hgrc
   $ echo "update.ne = python:`pwd`/nonexistent.py:testhook" >> .hg/hgrc
   $ echo "pre-identify.npmd = python:`pwd`/:no_python_module_dir" >> .hg/hgrc
 
   $ hg up null
   loading update.ne hook failed:
   abort: No such file or directory: $TESTTMP/d/repo/nonexistent.py
   [255]
 
   $ hg id
   loading pre-identify.npmd hook failed:
   abort: No module named repo!
   [255]
 
   $ cd ../../b
 
 make sure --traceback works on hook import failure
 
   $ cat > importfail.py <<EOF
   > import somebogusmodule
   > # dereference something in the module to force demandimport to load it
   > somebogusmodule.whatever
   > EOF
 
   $ echo '[hooks]' > .hg/hgrc
   $ echo 'precommit.importfail = python:importfail.whatever' >> .hg/hgrc
 
   $ echo a >> a
   $ hg --traceback commit -ma 2>&1 | egrep -v '^( +File|    [a-zA-Z(])'
   exception from first failed import attempt:
   Traceback (most recent call last):
   ImportError: No module named somebogusmodule
   exception from second failed import attempt:
   Traceback (most recent call last):
   ImportError: No module named hgext_importfail
   Traceback (most recent call last):
   Abort: precommit.importfail hook is invalid (import of "importfail" failed)
   abort: precommit.importfail hook is invalid (import of "importfail" failed)
 
 Issue1827: Hooks Update & Commit not completely post operation
 
-commit and update hooks should run after command completion
+commit and update hooks should run after command completion.  The largefiles
+use demonstrates a recursive wlock, showing the hook doesn't run until the
+final release (and dirstate flush).
 
   $ echo '[hooks]' > .hg/hgrc
   $ echo 'commit = hg id' >> .hg/hgrc
   $ echo 'update = hg id' >> .hg/hgrc
   $ echo bb > a
   $ hg ci -ma
   223eafe2750c tip
-  $ hg up 0
+  $ hg up 0 --config extensions.largefiles=
   cb9a9f314b8b
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
 make sure --verbose (and --quiet/--debug etc.) are propagated to the local ui
 that is passed to pre/post hooks
 
   $ echo '[hooks]' > .hg/hgrc
   $ echo 'pre-identify = python:hooktests.verbosehook' >> .hg/hgrc
   $ hg id
   cb9a9f314b8b
   $ hg id --verbose
   calling hook pre-identify: hooktests.verbosehook
   verbose output from hook
   cb9a9f314b8b
 
 Ensure hooks can be prioritized
 
   $ echo '[hooks]' > .hg/hgrc
   $ echo 'pre-identify.a = python:hooktests.verbosehook' >> .hg/hgrc
   $ echo 'pre-identify.b = python:hooktests.verbosehook' >> .hg/hgrc
   $ echo 'priority.pre-identify.b = 1' >> .hg/hgrc
   $ echo 'pre-identify.c = python:hooktests.verbosehook' >> .hg/hgrc
   $ hg id --verbose
   calling hook pre-identify.b: hooktests.verbosehook
   verbose output from hook
   calling hook pre-identify.a: hooktests.verbosehook
   verbose output from hook
   calling hook pre-identify.c: hooktests.verbosehook
   verbose output from hook
   cb9a9f314b8b
 
 new tags must be visible in pretxncommit (issue3210)
 
   $ echo 'pretxncommit.printtags = python:hooktests.printtags' >> .hg/hgrc
   $ hg tag -f foo
   ['a', 'foo', 'tip']
 
 new commits must be visible in pretxnchangegroup (issue3428)
 
   $ cd ..
   $ hg init to
   $ echo '[hooks]' >> to/.hg/hgrc
   $ echo 'pretxnchangegroup = hg --traceback tip' >> to/.hg/hgrc
   $ echo a >> to/a
   $ hg --cwd to ci -Ama
   adding a
   $ hg clone to from
   updating to branch default
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo aa >> from/a
   $ hg --cwd from ci -mb
   $ hg --cwd from push
   pushing to $TESTTMP/to (glob)
   searching for changes
   adding changesets
   adding manifests
   adding file changes
   added 1 changesets with 1 changes to 1 files
   changeset:   1:9836a07b9b9d
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     b