commandserver: pass around option to hook repo instance creation

This is necessary to wrap a repo instance so the master process will be
notified on repo.close().

mercurial/chgserver.py

@@ -1,637 +1,638 b''
 # chgserver.py - command server extension for cHg
 #
 # Copyright 2011 Yuya Nishihara <[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.
 
 """command server extension for cHg
 
 'S' channel (read/write)
     propagate ui.system() request to client
 
 'attachio' command
     attach client's stdio passed by sendmsg()
 
 'chdir' command
     change current directory
 
 'setenv' command
     replace os.environ completely
 
 'setumask' command (DEPRECATED)
 'setumask2' command
     set umask
 
 'validate' command
     reload the config and check if the server is up to date
 
 Config
 ------
 
 ::
 
   [chgserver]
   # how long (in seconds) should an idle chg server exit
   idletimeout = 3600
 
   # whether to skip config or env change checks
   skiphash = False
 """
 
 from __future__ import absolute_import
 
 import hashlib
 import inspect
 import os
 import re
 import socket
 import stat
 import struct
 import time
 
 from .i18n import _
 
 from . import (
     commandserver,
     encoding,
     error,
     extensions,
     node,
     pycompat,
     util,
 )
 
 from .utils import (
     procutil,
 )
 
 def _hashlist(items):
     """return sha1 hexdigest for a list"""
     return node.hex(hashlib.sha1(str(items)).digest())
 
 # sensitive config sections affecting confighash
 _configsections = [
     'alias',  # affects global state commands.table
     'eol',    # uses setconfig('eol', ...)
     'extdiff',  # uisetup will register new commands
     'extensions',
 ]
 
 _configsectionitems = [
     ('commands', 'show.aliasprefix'), # show.py reads it in extsetup
 ]
 
 # sensitive environment variables affecting confighash
 _envre = re.compile(r'''\A(?:
                     CHGHG
                     |HG(?:DEMANDIMPORT|EMITWARNINGS|MODULEPOLICY|PROF|RCPATH)?
                     |HG(?:ENCODING|PLAIN).*
                     |LANG(?:UAGE)?
                     |LC_.*
                     |LD_.*
                     |PATH
                     |PYTHON.*
                     |TERM(?:INFO)?
                     |TZ
                     )\Z''', re.X)
 
 def _confighash(ui):
     """return a quick hash for detecting config/env changes
 
     confighash is the hash of sensitive config items and environment variables.
 
     for chgserver, it is designed that once confighash changes, the server is
     not qualified to serve its client and should redirect the client to a new
     server. different from mtimehash, confighash change will not mark the
     server outdated and exit since the user can have different configs at the
     same time.
     """
     sectionitems = []
     for section in _configsections:
         sectionitems.append(ui.configitems(section))
     for section, item in _configsectionitems:
         sectionitems.append(ui.config(section, item))
     sectionhash = _hashlist(sectionitems)
     # If $CHGHG is set, the change to $HG should not trigger a new chg server
     if 'CHGHG' in encoding.environ:
         ignored = {'HG'}
     else:
         ignored = set()
     envitems = [(k, v) for k, v in encoding.environ.iteritems()
                 if _envre.match(k) and k not in ignored]
     envhash = _hashlist(sorted(envitems))
     return sectionhash[:6] + envhash[:6]
 
 def _getmtimepaths(ui):
     """get a list of paths that should be checked to detect change
 
     The list will include:
     - extensions (will not cover all files for complex extensions)
     - mercurial/__version__.py
     - python binary
     """
     modules = [m for n, m in extensions.extensions(ui)]
     try:
         from . import __version__
         modules.append(__version__)
     except ImportError:
         pass
     files = [pycompat.sysexecutable]
     for m in modules:
         try:
             files.append(inspect.getabsfile(m))
         except TypeError:
             pass
     return sorted(set(files))
 
 def _mtimehash(paths):
     """return a quick hash for detecting file changes
 
     mtimehash calls stat on given paths and calculate a hash based on size and
     mtime of each file. mtimehash does not read file content because reading is
     expensive. therefore it's not 100% reliable for detecting content changes.
     it's possible to return different hashes for same file contents.
     it's also possible to return a same hash for different file contents for
     some carefully crafted situation.
 
     for chgserver, it is designed that once mtimehash changes, the server is
     considered outdated immediately and should no longer provide service.
 
     mtimehash is not included in confighash because we only know the paths of
     extensions after importing them (there is imp.find_module but that faces
     race conditions). We need to calculate confighash without importing.
     """
     def trystat(path):
         try:
             st = os.stat(path)
             return (st[stat.ST_MTIME], st.st_size)
         except OSError:
             # could be ENOENT, EPERM etc. not fatal in any case
             pass
     return _hashlist(map(trystat, paths))[:12]
 
 class hashstate(object):
     """a structure storing confighash, mtimehash, paths used for mtimehash"""
     def __init__(self, confighash, mtimehash, mtimepaths):
         self.confighash = confighash
         self.mtimehash = mtimehash
         self.mtimepaths = mtimepaths
 
     @staticmethod
     def fromui(ui, mtimepaths=None):
         if mtimepaths is None:
             mtimepaths = _getmtimepaths(ui)
         confighash = _confighash(ui)
         mtimehash = _mtimehash(mtimepaths)
         ui.log('cmdserver', 'confighash = %s mtimehash = %s\n',
                confighash, mtimehash)
         return hashstate(confighash, mtimehash, mtimepaths)
 
 def _newchgui(srcui, csystem, attachio):
     class chgui(srcui.__class__):
         def __init__(self, src=None):
             super(chgui, self).__init__(src)
             if src:
                 self._csystem = getattr(src, '_csystem', csystem)
             else:
                 self._csystem = csystem
 
         def _runsystem(self, cmd, environ, cwd, out):
             # fallback to the original system method if
             #  a. the output stream is not stdout (e.g. stderr, cStringIO),
             #  b. or stdout is redirected by protectstdio(),
             # because the chg client is not aware of these situations and
             # will behave differently (i.e. write to stdout).
             if (out is not self.fout
                 or not util.safehasattr(self.fout, 'fileno')
                 or self.fout.fileno() != procutil.stdout.fileno()
                 or self._finoutredirected):
                 return procutil.system(cmd, environ=environ, cwd=cwd, out=out)
             self.flush()
             return self._csystem(cmd, procutil.shellenviron(environ), cwd)
 
         def _runpager(self, cmd, env=None):
             self._csystem(cmd, procutil.shellenviron(env), type='pager',
                           cmdtable={'attachio': attachio})
             return True
 
     return chgui(srcui)
 
 def _loadnewui(srcui, args, cdebug):
     from . import dispatch  # avoid cycle
 
     newui = srcui.__class__.load()
     for a in ['fin', 'fout', 'ferr', 'environ']:
         setattr(newui, a, getattr(srcui, a))
     if util.safehasattr(srcui, '_csystem'):
         newui._csystem = srcui._csystem
 
     # command line args
     options = dispatch._earlyparseopts(newui, args)
     dispatch._parseconfig(newui, options['config'])
 
     # stolen from tortoisehg.util.copydynamicconfig()
     for section, name, value in srcui.walkconfig():
         source = srcui.configsource(section, name)
         if ':' in source or source == '--config' or source.startswith('$'):
             # path:line or command line, or environ
             continue
         newui.setconfig(section, name, value, source)
 
     # load wd and repo config, copied from dispatch.py
     cwd = options['cwd']
     cwd = cwd and os.path.realpath(cwd) or None
     rpath = options['repository']
     path, newlui = dispatch._getlocal(newui, rpath, wd=cwd)
 
     extensions.populateui(newui)
     commandserver.setuplogging(newui, fp=cdebug)
     if newui is not newlui:
         extensions.populateui(newlui)
         commandserver.setuplogging(newlui, fp=cdebug)
 
     return (newui, newlui)
 
 class channeledsystem(object):
     """Propagate ui.system() request in the following format:
 
     payload length (unsigned int),
     type, '\0',
     cmd, '\0',
     cwd, '\0',
     envkey, '=', val, '\0',
     ...
     envkey, '=', val
 
     if type == 'system', waits for:
 
     exitcode length (unsigned int),
     exitcode (int)
 
     if type == 'pager', repetitively waits for a command name ending with '\n'
     and executes it defined by cmdtable, or exits the loop if the command name
     is empty.
     """
     def __init__(self, in_, out, channel):
         self.in_ = in_
         self.out = out
         self.channel = channel
 
     def __call__(self, cmd, environ, cwd=None, type='system', cmdtable=None):
         args = [type, procutil.quotecommand(cmd), os.path.abspath(cwd or '.')]
         args.extend('%s=%s' % (k, v) for k, v in environ.iteritems())
         data = '\0'.join(args)
         self.out.write(struct.pack('>cI', self.channel, len(data)))
         self.out.write(data)
         self.out.flush()
 
         if type == 'system':
             length = self.in_.read(4)
             length, = struct.unpack('>I', length)
             if length != 4:
                 raise error.Abort(_('invalid response'))
             rc, = struct.unpack('>i', self.in_.read(4))
             return rc
         elif type == 'pager':
             while True:
                 cmd = self.in_.readline()[:-1]
                 if not cmd:
                     break
                 if cmdtable and cmd in cmdtable:
                     cmdtable[cmd]()
                 else:
                     raise error.Abort(_('unexpected command: %s') % cmd)
         else:
             raise error.ProgrammingError('invalid S channel type: %s' % type)
 
 _iochannels = [
     # server.ch, ui.fp, mode
     ('cin', 'fin', r'rb'),
     ('cout', 'fout', r'wb'),
     ('cerr', 'ferr', r'wb'),
 ]
 
 class chgcmdserver(commandserver.server):
-    def __init__(self, ui, repo, fin, fout, sock, hashstate, baseaddress):
+    def __init__(self, ui, repo, fin, fout, sock, prereposetups,
+                 hashstate, baseaddress):
         super(chgcmdserver, self).__init__(
             _newchgui(ui, channeledsystem(fin, fout, 'S'), self.attachio),
-            repo, fin, fout)
+            repo, fin, fout, prereposetups)
         self.clientsock = sock
         self._ioattached = False
         self._oldios = []  # original (self.ch, ui.fp, fd) before "attachio"
         self.hashstate = hashstate
         self.baseaddress = baseaddress
         if hashstate is not None:
             self.capabilities = self.capabilities.copy()
             self.capabilities['validate'] = chgcmdserver.validate
 
     def cleanup(self):
         super(chgcmdserver, self).cleanup()
         # dispatch._runcatch() does not flush outputs if exception is not
         # handled by dispatch._dispatch()
         self.ui.flush()
         self._restoreio()
         self._ioattached = False
 
     def attachio(self):
         """Attach to client's stdio passed via unix domain socket; all
         channels except cresult will no longer be used
         """
         # tell client to sendmsg() with 1-byte payload, which makes it
         # distinctive from "attachio\n" command consumed by client.read()
         self.clientsock.sendall(struct.pack('>cI', 'I', 1))
         clientfds = util.recvfds(self.clientsock.fileno())
         self.ui.log('chgserver', 'received fds: %r\n', clientfds)
 
         ui = self.ui
         ui.flush()
         self._saveio()
         for fd, (cn, fn, mode) in zip(clientfds, _iochannels):
             assert fd > 0
             fp = getattr(ui, fn)
             os.dup2(fd, fp.fileno())
             os.close(fd)
             if self._ioattached:
                 continue
             # reset buffering mode when client is first attached. as we want
             # to see output immediately on pager, the mode stays unchanged
             # when client re-attached. ferr is unchanged because it should
             # be unbuffered no matter if it is a tty or not.
             if fn == 'ferr':
                 newfp = fp
             else:
                 # make it line buffered explicitly because the default is
                 # decided on first write(), where fout could be a pager.
                 if fp.isatty():
                     bufsize = 1  # line buffered
                 else:
                     bufsize = -1  # system default
                 newfp = os.fdopen(fp.fileno(), mode, bufsize)
                 setattr(ui, fn, newfp)
             setattr(self, cn, newfp)
 
         self._ioattached = True
         self.cresult.write(struct.pack('>i', len(clientfds)))
 
     def _saveio(self):
         if self._oldios:
             return
         ui = self.ui
         for cn, fn, _mode in _iochannels:
             ch = getattr(self, cn)
             fp = getattr(ui, fn)
             fd = os.dup(fp.fileno())
             self._oldios.append((ch, fp, fd))
 
     def _restoreio(self):
         ui = self.ui
         for (ch, fp, fd), (cn, fn, _mode) in zip(self._oldios, _iochannels):
             newfp = getattr(ui, fn)
             # close newfp while it's associated with client; otherwise it
             # would be closed when newfp is deleted
             if newfp is not fp:
                 newfp.close()
             # restore original fd: fp is open again
             os.dup2(fd, fp.fileno())
             os.close(fd)
             setattr(self, cn, ch)
             setattr(ui, fn, fp)
         del self._oldios[:]
 
     def validate(self):
         """Reload the config and check if the server is up to date
 
         Read a list of '\0' separated arguments.
         Write a non-empty list of '\0' separated instruction strings or '\0'
         if the list is empty.
         An instruction string could be either:
             - "unlink $path", the client should unlink the path to stop the
               outdated server.
             - "redirect $path", the client should attempt to connect to $path
               first. If it does not work, start a new server. It implies
               "reconnect".
             - "exit $n", the client should exit directly with code n.
               This may happen if we cannot parse the config.
             - "reconnect", the client should close the connection and
               reconnect.
         If neither "reconnect" nor "redirect" is included in the instruction
         list, the client can continue with this server after completing all
         the instructions.
         """
         from . import dispatch  # avoid cycle
 
         args = self._readlist()
         try:
             self.ui, lui = _loadnewui(self.ui, args, self.cdebug)
         except error.ParseError as inst:
             dispatch._formatparse(self.ui.warn, inst)
             self.ui.flush()
             self.cresult.write('exit 255')
             return
         except error.Abort as inst:
             self.ui.error(_("abort: %s\n") % inst)
             if inst.hint:
                 self.ui.error(_("(%s)\n") % inst.hint)
             self.ui.flush()
             self.cresult.write('exit 255')
             return
         newhash = hashstate.fromui(lui, self.hashstate.mtimepaths)
         insts = []
         if newhash.mtimehash != self.hashstate.mtimehash:
             addr = _hashaddress(self.baseaddress, self.hashstate.confighash)
             insts.append('unlink %s' % addr)
             # mtimehash is empty if one or more extensions fail to load.
             # to be compatible with hg, still serve the client this time.
             if self.hashstate.mtimehash:
                 insts.append('reconnect')
         if newhash.confighash != self.hashstate.confighash:
             addr = _hashaddress(self.baseaddress, newhash.confighash)
             insts.append('redirect %s' % addr)
         self.ui.log('chgserver', 'validate: %s\n', insts)
         self.cresult.write('\0'.join(insts) or '\0')
 
     def chdir(self):
         """Change current directory
 
         Note that the behavior of --cwd option is bit different from this.
         It does not affect --config parameter.
         """
         path = self._readstr()
         if not path:
             return
         self.ui.log('chgserver', 'chdir to %r\n', path)
         os.chdir(path)
 
     def setumask(self):
         """Change umask (DEPRECATED)"""
         # BUG: this does not follow the message frame structure, but kept for
         # backward compatibility with old chg clients for some time
         self._setumask(self._read(4))
 
     def setumask2(self):
         """Change umask"""
         data = self._readstr()
         if len(data) != 4:
             raise ValueError('invalid mask length in setumask2 request')
         self._setumask(data)
 
     def _setumask(self, data):
         mask = struct.unpack('>I', data)[0]
         self.ui.log('chgserver', 'setumask %r\n', mask)
         os.umask(mask)
 
     def runcommand(self):
         # pager may be attached within the runcommand session, which should
         # be detached at the end of the session. otherwise the pager wouldn't
         # receive EOF.
         globaloldios = self._oldios
         self._oldios = []
         try:
             return super(chgcmdserver, self).runcommand()
         finally:
             self._restoreio()
             self._oldios = globaloldios
 
     def setenv(self):
         """Clear and update os.environ
 
         Note that not all variables can make an effect on the running process.
         """
         l = self._readlist()
         try:
             newenv = dict(s.split('=', 1) for s in l)
         except ValueError:
             raise ValueError('unexpected value in setenv request')
         self.ui.log('chgserver', 'setenv: %r\n', sorted(newenv.keys()))
         encoding.environ.clear()
         encoding.environ.update(newenv)
 
     capabilities = commandserver.server.capabilities.copy()
     capabilities.update({'attachio': attachio,
                          'chdir': chdir,
                          'runcommand': runcommand,
                          'setenv': setenv,
                          'setumask': setumask,
                          'setumask2': setumask2})
 
     if util.safehasattr(procutil, 'setprocname'):
         def setprocname(self):
             """Change process title"""
             name = self._readstr()
             self.ui.log('chgserver', 'setprocname: %r\n', name)
             procutil.setprocname(name)
         capabilities['setprocname'] = setprocname
 
 def _tempaddress(address):
     return '%s.%d.tmp' % (address, os.getpid())
 
 def _hashaddress(address, hashstr):
     # if the basename of address contains '.', use only the left part. this
     # makes it possible for the client to pass 'server.tmp$PID' and follow by
     # an atomic rename to avoid locking when spawning new servers.
     dirname, basename = os.path.split(address)
     basename = basename.split('.', 1)[0]
     return '%s-%s' % (os.path.join(dirname, basename), hashstr)
 
 class chgunixservicehandler(object):
     """Set of operations for chg services"""
 
     pollinterval = 1  # [sec]
 
     def __init__(self, ui):
         self.ui = ui
         self._idletimeout = ui.configint('chgserver', 'idletimeout')
         self._lastactive = time.time()
 
     def bindsocket(self, sock, address):
         self._inithashstate(address)
         self._checkextensions()
         self._bind(sock)
         self._createsymlink()
         # no "listening at" message should be printed to simulate hg behavior
 
     def _inithashstate(self, address):
         self._baseaddress = address
         if self.ui.configbool('chgserver', 'skiphash'):
             self._hashstate = None
             self._realaddress = address
             return
         self._hashstate = hashstate.fromui(self.ui)
         self._realaddress = _hashaddress(address, self._hashstate.confighash)
 
     def _checkextensions(self):
         if not self._hashstate:
             return
         if extensions.notloaded():
             # one or more extensions failed to load. mtimehash becomes
             # meaningless because we do not know the paths of those extensions.
             # set mtimehash to an illegal hash value to invalidate the server.
             self._hashstate.mtimehash = ''
 
     def _bind(self, sock):
         # use a unique temp address so we can stat the file and do ownership
         # check later
         tempaddress = _tempaddress(self._realaddress)
         util.bindunixsocket(sock, tempaddress)
         self._socketstat = os.stat(tempaddress)
         sock.listen(socket.SOMAXCONN)
         # rename will replace the old socket file if exists atomically. the
         # old server will detect ownership change and exit.
         util.rename(tempaddress, self._realaddress)
 
     def _createsymlink(self):
         if self._baseaddress == self._realaddress:
             return
         tempaddress = _tempaddress(self._baseaddress)
         os.symlink(os.path.basename(self._realaddress), tempaddress)
         util.rename(tempaddress, self._baseaddress)
 
     def _issocketowner(self):
         try:
             st = os.stat(self._realaddress)
             return (st.st_ino == self._socketstat.st_ino and
                     st[stat.ST_MTIME] == self._socketstat[stat.ST_MTIME])
         except OSError:
             return False
 
     def unlinksocket(self, address):
         if not self._issocketowner():
             return
         # it is possible to have a race condition here that we may
         # remove another server's socket file. but that's okay
         # since that server will detect and exit automatically and
         # the client will start a new server on demand.
         util.tryunlink(self._realaddress)
 
     def shouldexit(self):
         if not self._issocketowner():
             self.ui.log(b'chgserver', b'%s is not owned, exiting.\n',
                         self._realaddress)
             return True
         if time.time() - self._lastactive > self._idletimeout:
             self.ui.log(b'chgserver', b'being idle too long. exiting.\n')
             return True
         return False
 
     def newconnection(self):
         self._lastactive = time.time()
 
-    def createcmdserver(self, repo, conn, fin, fout):
-        return chgcmdserver(self.ui, repo, fin, fout, conn,
+    def createcmdserver(self, repo, conn, fin, fout, prereposetups):
+        return chgcmdserver(self.ui, repo, fin, fout, conn, prereposetups,
                             self._hashstate, self._baseaddress)
 
 def chgunixservice(ui, repo, opts):
     # CHGINTERNALMARK is set by chg client. It is an indication of things are
     # started by chg so other code can do things accordingly, like disabling
     # demandimport or detecting chg client started by chg client. When executed
     # here, CHGINTERNALMARK is no longer useful and hence dropped to make
     # environ cleaner.
     if 'CHGINTERNALMARK' in encoding.environ:
         del encoding.environ['CHGINTERNALMARK']
 
     if repo:
         # one chgserver can serve multiple repos. drop repo information
         ui.setconfig('bundle', 'mainreporoot', '', 'repo')
     h = chgunixservicehandler(ui)
     return commandserver.unixforkingservice(ui, repo=None, opts=opts, handler=h)

mercurial/commandserver.py

@@ -1,624 +1,627 b''
 # commandserver.py - communicate with Mercurial's API over a pipe
 #
 #  Copyright 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.
 
 from __future__ import absolute_import
 
 import errno
 import gc
 import os
 import random
 import signal
 import socket
 import struct
 import traceback
 
 try:
     import selectors
     selectors.BaseSelector
 except ImportError:
     from .thirdparty import selectors2 as selectors
 
 from .i18n import _
 from . import (
     encoding,
     error,
     loggingutil,
     pycompat,
     util,
     vfs as vfsmod,
 )
 from .utils import (
     cborutil,
     procutil,
 )
 
 class channeledoutput(object):
     """
     Write data to out in the following format:
 
     data length (unsigned int),
     data
     """
     def __init__(self, out, channel):
         self.out = out
         self.channel = channel
 
     @property
     def name(self):
         return '<%c-channel>' % self.channel
 
     def write(self, data):
         if not data:
             return
         # single write() to guarantee the same atomicity as the underlying file
         self.out.write(struct.pack('>cI', self.channel, len(data)) + data)
         self.out.flush()
 
     def __getattr__(self, attr):
         if attr in (r'isatty', r'fileno', r'tell', r'seek'):
             raise AttributeError(attr)
         return getattr(self.out, attr)
 
 class channeledmessage(object):
     """
     Write encoded message and metadata to out in the following format:
 
     data length (unsigned int),
     encoded message and metadata, as a flat key-value dict.
 
     Each message should have 'type' attribute. Messages of unknown type
     should be ignored.
     """
 
     # teach ui that write() can take **opts
     structured = True
 
     def __init__(self, out, channel, encodename, encodefn):
         self._cout = channeledoutput(out, channel)
         self.encoding = encodename
         self._encodefn = encodefn
 
     def write(self, data, **opts):
         opts = pycompat.byteskwargs(opts)
         if data is not None:
             opts[b'data'] = data
         self._cout.write(self._encodefn(opts))
 
     def __getattr__(self, attr):
         return getattr(self._cout, attr)
 
 class channeledinput(object):
     """
     Read data from in_.
 
     Requests for input are written to out in the following format:
     channel identifier - 'I' for plain input, 'L' line based (1 byte)
     how many bytes to send at most (unsigned int),
 
     The client replies with:
     data length (unsigned int), 0 meaning EOF
     data
     """
 
     maxchunksize = 4 * 1024
 
     def __init__(self, in_, out, channel):
         self.in_ = in_
         self.out = out
         self.channel = channel
 
     @property
     def name(self):
         return '<%c-channel>' % self.channel
 
     def read(self, size=-1):
         if size < 0:
             # if we need to consume all the clients input, ask for 4k chunks
             # so the pipe doesn't fill up risking a deadlock
             size = self.maxchunksize
             s = self._read(size, self.channel)
             buf = s
             while s:
                 s = self._read(size, self.channel)
                 buf += s
 
             return buf
         else:
             return self._read(size, self.channel)
 
     def _read(self, size, channel):
         if not size:
             return ''
         assert size > 0
 
         # tell the client we need at most size bytes
         self.out.write(struct.pack('>cI', channel, size))
         self.out.flush()
 
         length = self.in_.read(4)
         length = struct.unpack('>I', length)[0]
         if not length:
             return ''
         else:
             return self.in_.read(length)
 
     def readline(self, size=-1):
         if size < 0:
             size = self.maxchunksize
             s = self._read(size, 'L')
             buf = s
             # keep asking for more until there's either no more or
             # we got a full line
             while s and s[-1] != '\n':
                 s = self._read(size, 'L')
                 buf += s
 
             return buf
         else:
             return self._read(size, 'L')
 
     def __iter__(self):
         return self
 
     def next(self):
         l = self.readline()
         if not l:
             raise StopIteration
         return l
 
     __next__ = next
 
     def __getattr__(self, attr):
         if attr in (r'isatty', r'fileno', r'tell', r'seek'):
             raise AttributeError(attr)
         return getattr(self.in_, attr)
 
 _messageencoders = {
     b'cbor': lambda v: b''.join(cborutil.streamencode(v)),
 }
 
 def _selectmessageencoder(ui):
     # experimental config: cmdserver.message-encodings
     encnames = ui.configlist(b'cmdserver', b'message-encodings')
     for n in encnames:
         f = _messageencoders.get(n)
         if f:
             return n, f
     raise error.Abort(b'no supported message encodings: %s'
                       % b' '.join(encnames))
 
 class server(object):
     """
     Listens for commands on fin, runs them and writes the output on a channel
     based stream to fout.
     """
-    def __init__(self, ui, repo, fin, fout):
+    def __init__(self, ui, repo, fin, fout, prereposetups=None):
         self.cwd = encoding.getcwd()
 
         if repo:
             # the ui here is really the repo ui so take its baseui so we don't
             # end up with its local configuration
             self.ui = repo.baseui
             self.repo = repo
             self.repoui = repo.ui
         else:
             self.ui = ui
             self.repo = self.repoui = None
+        self._prereposetups = prereposetups
 
         self.cdebug = channeledoutput(fout, 'd')
         self.cerr = channeledoutput(fout, 'e')
         self.cout = channeledoutput(fout, 'o')
         self.cin = channeledinput(fin, fout, 'I')
         self.cresult = channeledoutput(fout, 'r')
 
         if self.ui.config(b'cmdserver', b'log') == b'-':
             # switch log stream of server's ui to the 'd' (debug) channel
             # (don't touch repo.ui as its lifetime is longer than the server)
             self.ui = self.ui.copy()
             setuplogging(self.ui, repo=None, fp=self.cdebug)
 
         # TODO: add this to help/config.txt when stabilized
         # ``channel``
         #   Use separate channel for structured output. (Command-server only)
         self.cmsg = None
         if ui.config(b'ui', b'message-output') == b'channel':
             encname, encfn = _selectmessageencoder(ui)
             self.cmsg = channeledmessage(fout, b'm', encname, encfn)
 
         self.client = fin
 
     def cleanup(self):
         """release and restore resources taken during server session"""
 
     def _read(self, size):
         if not size:
             return ''
 
         data = self.client.read(size)
 
         # is the other end closed?
         if not data:
             raise EOFError
 
         return data
 
     def _readstr(self):
         """read a string from the channel
 
         format:
         data length (uint32), data
         """
         length = struct.unpack('>I', self._read(4))[0]
         if not length:
             return ''
         return self._read(length)
 
     def _readlist(self):
         """read a list of NULL separated strings from the channel"""
         s = self._readstr()
         if s:
             return s.split('\0')
         else:
             return []
 
     def runcommand(self):
         """ reads a list of \0 terminated arguments, executes
         and writes the return code to the result channel """
         from . import dispatch  # avoid cycle
 
         args = self._readlist()
 
         # copy the uis so changes (e.g. --config or --verbose) don't
         # persist between requests
         copiedui = self.ui.copy()
         uis = [copiedui]
         if self.repo:
             self.repo.baseui = copiedui
             # clone ui without using ui.copy because this is protected
             repoui = self.repoui.__class__(self.repoui)
             repoui.copy = copiedui.copy # redo copy protection
             uis.append(repoui)
             self.repo.ui = self.repo.dirstate._ui = repoui
             self.repo.invalidateall()
 
         for ui in uis:
             ui.resetstate()
             # any kind of interaction must use server channels, but chg may
             # replace channels by fully functional tty files. so nontty is
             # enforced only if cin is a channel.
             if not util.safehasattr(self.cin, 'fileno'):
                 ui.setconfig('ui', 'nontty', 'true', 'commandserver')
 
         req = dispatch.request(args[:], copiedui, self.repo, self.cin,
-                               self.cout, self.cerr, self.cmsg)
+                               self.cout, self.cerr, self.cmsg,
+                               prereposetups=self._prereposetups)
 
         try:
             ret = dispatch.dispatch(req) & 255
             self.cresult.write(struct.pack('>i', int(ret)))
         finally:
             # restore old cwd
             if '--cwd' in args:
                 os.chdir(self.cwd)
 
     def getencoding(self):
         """ writes the current encoding to the result channel """
         self.cresult.write(encoding.encoding)
 
     def serveone(self):
         cmd = self.client.readline()[:-1]
         if cmd:
             handler = self.capabilities.get(cmd)
             if handler:
                 handler(self)
             else:
                 # clients are expected to check what commands are supported by
                 # looking at the servers capabilities
                 raise error.Abort(_('unknown command %s') % cmd)
 
         return cmd != ''
 
     capabilities = {'runcommand': runcommand,
                     'getencoding': getencoding}
 
     def serve(self):
         hellomsg = 'capabilities: ' + ' '.join(sorted(self.capabilities))
         hellomsg += '\n'
         hellomsg += 'encoding: ' + encoding.encoding
         hellomsg += '\n'
         if self.cmsg:
             hellomsg += 'message-encoding: %s\n' % self.cmsg.encoding
         hellomsg += 'pid: %d' % procutil.getpid()
         if util.safehasattr(os, 'getpgid'):
             hellomsg += '\n'
             hellomsg += 'pgid: %d' % os.getpgid(0)
 
         # write the hello msg in -one- chunk
         self.cout.write(hellomsg)
 
         try:
             while self.serveone():
                 pass
         except EOFError:
             # we'll get here if the client disconnected while we were reading
             # its request
             return 1
 
         return 0
 
 def setuplogging(ui, repo=None, fp=None):
     """Set up server logging facility
 
     If cmdserver.log is '-', log messages will be sent to the given fp.
     It should be the 'd' channel while a client is connected, and otherwise
     is the stderr of the server process.
     """
     # developer config: cmdserver.log
     logpath = ui.config(b'cmdserver', b'log')
     if not logpath:
         return
     # developer config: cmdserver.track-log
     tracked = set(ui.configlist(b'cmdserver', b'track-log'))
 
     if logpath == b'-' and fp:
         logger = loggingutil.fileobjectlogger(fp, tracked)
     elif logpath == b'-':
         logger = loggingutil.fileobjectlogger(ui.ferr, tracked)
     else:
         logpath = os.path.abspath(util.expandpath(logpath))
         # developer config: cmdserver.max-log-files
         maxfiles = ui.configint(b'cmdserver', b'max-log-files')
         # developer config: cmdserver.max-log-size
         maxsize = ui.configbytes(b'cmdserver', b'max-log-size')
         vfs = vfsmod.vfs(os.path.dirname(logpath))
         logger = loggingutil.filelogger(vfs, os.path.basename(logpath), tracked,
                                         maxfiles=maxfiles, maxsize=maxsize)
 
     targetuis = {ui}
     if repo:
         targetuis.add(repo.baseui)
         targetuis.add(repo.ui)
     for u in targetuis:
         u.setlogger(b'cmdserver', logger)
 
 class pipeservice(object):
     def __init__(self, ui, repo, opts):
         self.ui = ui
         self.repo = repo
 
     def init(self):
         pass
 
     def run(self):
         ui = self.ui
         # redirect stdio to null device so that broken extensions or in-process
         # hooks will never cause corruption of channel protocol.
         with procutil.protectedstdio(ui.fin, ui.fout) as (fin, fout):
             sv = server(ui, self.repo, fin, fout)
             try:
                 return sv.serve()
             finally:
                 sv.cleanup()
 
 def _initworkerprocess():
     # use a different process group from the master process, in order to:
     # 1. make the current process group no longer "orphaned" (because the
     #    parent of this process is in a different process group while
     #    remains in a same session)
     #    according to POSIX 2.2.2.52, orphaned process group will ignore
     #    terminal-generated stop signals like SIGTSTP (Ctrl+Z), which will
     #    cause trouble for things like ncurses.
     # 2. the client can use kill(-pgid, sig) to simulate terminal-generated
     #    SIGINT (Ctrl+C) and process-exit-generated SIGHUP. our child
     #    processes like ssh will be killed properly, without affecting
     #    unrelated processes.
     os.setpgid(0, 0)
     # change random state otherwise forked request handlers would have a
     # same state inherited from parent.
     random.seed()
 
-def _serverequest(ui, repo, conn, createcmdserver):
+def _serverequest(ui, repo, conn, createcmdserver, prereposetups):
     fin = conn.makefile(r'rb')
     fout = conn.makefile(r'wb')
     sv = None
     try:
-        sv = createcmdserver(repo, conn, fin, fout)
+        sv = createcmdserver(repo, conn, fin, fout, prereposetups)
         try:
             sv.serve()
         # handle exceptions that may be raised by command server. most of
         # known exceptions are caught by dispatch.
         except error.Abort as inst:
             ui.error(_('abort: %s\n') % inst)
         except IOError as inst:
             if inst.errno != errno.EPIPE:
                 raise
         except KeyboardInterrupt:
             pass
         finally:
             sv.cleanup()
     except: # re-raises
         # also write traceback to error channel. otherwise client cannot
         # see it because it is written to server's stderr by default.
         if sv:
             cerr = sv.cerr
         else:
             cerr = channeledoutput(fout, 'e')
         cerr.write(encoding.strtolocal(traceback.format_exc()))
         raise
     finally:
         fin.close()
         try:
             fout.close()  # implicit flush() may cause another EPIPE
         except IOError as inst:
             if inst.errno != errno.EPIPE:
                 raise
 
 class unixservicehandler(object):
     """Set of pluggable operations for unix-mode services
 
     Almost all methods except for createcmdserver() are called in the main
     process. You can't pass mutable resource back from createcmdserver().
     """
 
     pollinterval = None
 
     def __init__(self, ui):
         self.ui = ui
 
     def bindsocket(self, sock, address):
         util.bindunixsocket(sock, address)
         sock.listen(socket.SOMAXCONN)
         self.ui.status(_('listening at %s\n') % address)
         self.ui.flush()  # avoid buffering of status message
 
     def unlinksocket(self, address):
         os.unlink(address)
 
     def shouldexit(self):
         """True if server should shut down; checked per pollinterval"""
         return False
 
     def newconnection(self):
         """Called when main process notices new connection"""
 
-    def createcmdserver(self, repo, conn, fin, fout):
+    def createcmdserver(self, repo, conn, fin, fout, prereposetups):
         """Create new command server instance; called in the process that
         serves for the current connection"""
-        return server(self.ui, repo, fin, fout)
+        return server(self.ui, repo, fin, fout, prereposetups)
 
 class unixforkingservice(object):
     """
     Listens on unix domain socket and forks server per connection
     """
 
     def __init__(self, ui, repo, opts, handler=None):
         self.ui = ui
         self.repo = repo
         self.address = opts['address']
         if not util.safehasattr(socket, 'AF_UNIX'):
             raise error.Abort(_('unsupported platform'))
         if not self.address:
             raise error.Abort(_('no socket path specified with --address'))
         self._servicehandler = handler or unixservicehandler(ui)
         self._sock = None
         self._oldsigchldhandler = None
         self._workerpids = set()  # updated by signal handler; do not iterate
         self._socketunlinked = None
 
     def init(self):
         self._sock = socket.socket(socket.AF_UNIX)
         self._servicehandler.bindsocket(self._sock, self.address)
         if util.safehasattr(procutil, 'unblocksignal'):
             procutil.unblocksignal(signal.SIGCHLD)
         o = signal.signal(signal.SIGCHLD, self._sigchldhandler)
         self._oldsigchldhandler = o
         self._socketunlinked = False
 
     def _unlinksocket(self):
         if not self._socketunlinked:
             self._servicehandler.unlinksocket(self.address)
             self._socketunlinked = True
 
     def _cleanup(self):
         signal.signal(signal.SIGCHLD, self._oldsigchldhandler)
         self._sock.close()
         self._unlinksocket()
         # don't kill child processes as they have active clients, just wait
         self._reapworkers(0)
 
     def run(self):
         try:
             self._mainloop()
         finally:
             self._cleanup()
 
     def _mainloop(self):
         exiting = False
         h = self._servicehandler
         selector = selectors.DefaultSelector()
         selector.register(self._sock, selectors.EVENT_READ)
         while True:
             if not exiting and h.shouldexit():
                 # clients can no longer connect() to the domain socket, so
                 # we stop queuing new requests.
                 # for requests that are queued (connect()-ed, but haven't been
                 # accept()-ed), handle them before exit. otherwise, clients
                 # waiting for recv() will receive ECONNRESET.
                 self._unlinksocket()
                 exiting = True
             try:
                 ready = selector.select(timeout=h.pollinterval)
             except OSError as inst:
                 # selectors2 raises ETIMEDOUT if timeout exceeded while
                 # handling signal interrupt. That's probably wrong, but
                 # we can easily get around it.
                 if inst.errno != errno.ETIMEDOUT:
                     raise
                 ready = []
             if not ready:
                 # only exit if we completed all queued requests
                 if exiting:
                     break
                 continue
             try:
                 conn, _addr = self._sock.accept()
             except socket.error as inst:
                 if inst.args[0] == errno.EINTR:
                     continue
                 raise
 
             pid = os.fork()
             if pid:
                 try:
                     self.ui.log(b'cmdserver',
                                 b'forked worker process (pid=%d)\n', pid)
                     self._workerpids.add(pid)
                     h.newconnection()
                 finally:
                     conn.close()  # release handle in parent process
             else:
                 try:
                     selector.close()
                     self._sock.close()
                     self._runworker(conn)
                     conn.close()
                     os._exit(0)
                 except:  # never return, hence no re-raises
                     try:
                         self.ui.traceback(force=True)
                     finally:
                         os._exit(255)
         selector.close()
 
     def _sigchldhandler(self, signal, frame):
         self._reapworkers(os.WNOHANG)
 
     def _reapworkers(self, options):
         while self._workerpids:
             try:
                 pid, _status = os.waitpid(-1, options)
             except OSError as inst:
                 if inst.errno == errno.EINTR:
                     continue
                 if inst.errno != errno.ECHILD:
                     raise
                 # no child processes at all (reaped by other waitpid()?)
                 self._workerpids.clear()
                 return
             if pid == 0:
                 # no waitable child processes
                 return
             self.ui.log(b'cmdserver', b'worker process exited (pid=%d)\n', pid)
             self._workerpids.discard(pid)
 
     def _runworker(self, conn):
         signal.signal(signal.SIGCHLD, self._oldsigchldhandler)
         _initworkerprocess()
         h = self._servicehandler
         try:
-            _serverequest(self.ui, self.repo, conn, h.createcmdserver)
+            _serverequest(self.ui, self.repo, conn, h.createcmdserver,
+                          prereposetups=None)  # TODO: pass in hook functions
         finally:
             gc.collect()  # trigger __del__ since worker process uses os._exit

tests/test-commandserver.t

@@ -1,1105 +1,1105 b''
 #if windows
   $ PYTHONPATH="$TESTDIR/../contrib;$PYTHONPATH"
 #else
   $ PYTHONPATH="$TESTDIR/../contrib:$PYTHONPATH"
 #endif
   $ export PYTHONPATH
 
 typical client does not want echo-back messages, so test without it:
 
   $ grep -v '^promptecho ' < $HGRCPATH >> $HGRCPATH.new
   $ mv $HGRCPATH.new $HGRCPATH
 
   $ hg init repo
   $ cd repo
 
   >>> from __future__ import absolute_import
   >>> import os
   >>> import sys
   >>> from hgclient import bprint, check, readchannel, runcommand
   >>> @check
   ... def hellomessage(server):
   ...     ch, data = readchannel(server)
   ...     bprint(b'%c, %r' % (ch, data))
   ...     # run an arbitrary command to make sure the next thing the server
   ...     # sends isn't part of the hello message
   ...     runcommand(server, [b'id'])
   o, 'capabilities: getencoding runcommand\nencoding: *\npid: *' (glob)
   *** runcommand id
   000000000000 tip
 
   >>> from hgclient import check
   >>> @check
   ... def unknowncommand(server):
   ...     server.stdin.write(b'unknowncommand\n')
   abort: unknown command unknowncommand
 
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def checkruncommand(server):
   ...     # hello block
   ...     readchannel(server)
   ... 
   ...     # no args
   ...     runcommand(server, [])
   ... 
   ...     # global options
   ...     runcommand(server, [b'id', b'--quiet'])
   ... 
   ...     # make sure global options don't stick through requests
   ...     runcommand(server, [b'id'])
   ... 
   ...     # --config
   ...     runcommand(server, [b'id', b'--config', b'ui.quiet=True'])
   ... 
   ...     # make sure --config doesn't stick
   ...     runcommand(server, [b'id'])
   ... 
   ...     # negative return code should be masked
   ...     runcommand(server, [b'id', b'-runknown'])
   *** runcommand 
   Mercurial Distributed SCM
   
   basic commands:
   
    add           add the specified files on the next commit
    annotate      show changeset information by line for each file
    clone         make a copy of an existing repository
    commit        commit the specified files or all outstanding changes
    diff          diff repository (or selected files)
    export        dump the header and diffs for one or more changesets
    forget        forget the specified files on the next commit
    init          create a new repository in the given directory
    log           show revision history of entire repository or files
    merge         merge another revision into working directory
    pull          pull changes from the specified source
    push          push changes to the specified destination
    remove        remove the specified files on the next commit
    serve         start stand-alone webserver
    status        show changed files in the working directory
    summary       summarize working directory state
    update        update working directory (or switch revisions)
   
   (use 'hg help' for the full list of commands or 'hg -v' for details)
   *** runcommand id --quiet
   000000000000
   *** runcommand id
   000000000000 tip
   *** runcommand id --config ui.quiet=True
   000000000000
   *** runcommand id
   000000000000 tip
   *** runcommand id -runknown
   abort: unknown revision 'unknown'!
    [255]
 
   >>> from hgclient import bprint, check, readchannel
   >>> @check
   ... def inputeof(server):
   ...     readchannel(server)
   ...     server.stdin.write(b'runcommand\n')
   ...     # close stdin while server is waiting for input
   ...     server.stdin.close()
   ... 
   ...     # server exits with 1 if the pipe closed while reading the command
   ...     bprint(b'server exit code =', b'%d' % server.wait())
   server exit code = 1
 
   >>> from hgclient import check, readchannel, runcommand, stringio
   >>> @check
   ... def serverinput(server):
   ...     readchannel(server)
   ... 
   ...     patch = b"""
   ... # HG changeset patch
   ... # User test
   ... # Date 0 0
   ... # Node ID c103a3dec114d882c98382d684d8af798d09d857
   ... # Parent  0000000000000000000000000000000000000000
   ... 1
   ... 
   ... diff -r 000000000000 -r c103a3dec114 a
   ... --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
   ... +++ b/a	Thu Jan 01 00:00:00 1970 +0000
   ... @@ -0,0 +1,1 @@
   ... +1
   ... """
   ... 
   ...     runcommand(server, [b'import', b'-'], input=stringio(patch))
   ...     runcommand(server, [b'log'])
   *** runcommand import -
   applying patch from stdin
   *** runcommand log
   changeset:   0:eff892de26ec
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
 
 check strict parsing of early options:
 
   >>> import os
   >>> from hgclient import check, readchannel, runcommand
   >>> os.environ['HGPLAIN'] = '+strictflags'
   >>> @check
   ... def cwd(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'log', b'-b', b'--config=alias.log=!echo pwned',
   ...                         b'default'])
   *** runcommand log -b --config=alias.log=!echo pwned default
   abort: unknown revision '--config=alias.log=!echo pwned'!
    [255]
 
 check that "histedit --commands=-" can read rules from the input channel:
 
   >>> from hgclient import check, readchannel, runcommand, stringio
   >>> @check
   ... def serverinput(server):
   ...     readchannel(server)
   ...     rules = b'pick eff892de26ec\n'
   ...     runcommand(server, [b'histedit', b'0', b'--commands=-',
   ...                         b'--config', b'extensions.histedit='],
   ...                input=stringio(rules))
   *** runcommand histedit 0 --commands=- --config extensions.histedit=
 
 check that --cwd doesn't persist between requests:
 
   $ mkdir foo
   $ touch foo/bar
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def cwd(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'--cwd', b'foo', b'st', b'bar'])
   ...     runcommand(server, [b'st', b'foo/bar'])
   *** runcommand --cwd foo st bar
   ? bar
   *** runcommand st foo/bar
   ? foo/bar
 
   $ rm foo/bar
 
 
 check that local configs for the cached repo aren't inherited when -R is used:
 
   $ cat <<EOF >> .hg/hgrc
   > [ui]
   > foo = bar
   > EOF
 
 #if no-extraextensions
 
   >>> from hgclient import check, readchannel, runcommand, sep
   >>> @check
   ... def localhgrc(server):
   ...     readchannel(server)
   ... 
   ...     # the cached repo local hgrc contains ui.foo=bar, so showconfig should
   ...     # show it
   ...     runcommand(server, [b'showconfig'], outfilter=sep)
   ... 
   ...     # but not for this repo
   ...     runcommand(server, [b'init', b'foo'])
   ...     runcommand(server, [b'-R', b'foo', b'showconfig', b'ui', b'defaults'])
   *** runcommand showconfig
   bundle.mainreporoot=$TESTTMP/repo
   devel.all-warnings=true
   devel.default-date=0 0
   extensions.fsmonitor= (fsmonitor !)
   largefiles.usercache=$TESTTMP/.cache/largefiles
   lfs.usercache=$TESTTMP/.cache/lfs
   ui.slash=True
   ui.interactive=False
   ui.merge=internal:merge
   ui.mergemarkers=detailed
   ui.foo=bar
   ui.nontty=true
   web.address=localhost
   web\.ipv6=(?:True|False) (re)
   web.server-header=testing stub value
   *** runcommand init foo
   *** runcommand -R foo showconfig ui defaults
   ui.slash=True
   ui.interactive=False
   ui.merge=internal:merge
   ui.mergemarkers=detailed
   ui.nontty=true
 #endif
 
   $ rm -R foo
 
 #if windows
   $ PYTHONPATH="$TESTTMP/repo;$PYTHONPATH"
 #else
   $ PYTHONPATH="$TESTTMP/repo:$PYTHONPATH"
 #endif
 
   $ cat <<EOF > hook.py
   > import sys
   > from hgclient import bprint
   > def hook(**args):
   >     bprint(b'hook talking')
   >     bprint(b'now try to read something: %r' % sys.stdin.read())
   > EOF
 
   >>> from hgclient import check, readchannel, runcommand, stringio
   >>> @check
   ... def hookoutput(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'--config',
   ...                         b'hooks.pre-identify=python:hook.hook',
   ...                         b'id'],
   ...                input=stringio(b'some input'))
   *** runcommand --config hooks.pre-identify=python:hook.hook id
   eff892de26ec tip
   hook talking
   now try to read something: ''
 
 Clean hook cached version
   $ rm hook.py*
   $ rm -Rf __pycache__
 
   $ echo a >> a
   >>> import os
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def outsidechanges(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'status'])
   ...     os.system('hg ci -Am2')
   ...     runcommand(server, [b'tip'])
   ...     runcommand(server, [b'status'])
   *** runcommand status
   M a
   *** runcommand tip
   changeset:   1:d3a0a68be6de
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     2
   
   *** runcommand status
 
   >>> import os
   >>> from hgclient import bprint, check, readchannel, runcommand
   >>> @check
   ... def bookmarks(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'bookmarks'])
   ... 
   ...     # changes .hg/bookmarks
   ...     os.system('hg bookmark -i bm1')
   ...     os.system('hg bookmark -i bm2')
   ...     runcommand(server, [b'bookmarks'])
   ... 
   ...     # changes .hg/bookmarks.current
   ...     os.system('hg upd bm1 -q')
   ...     runcommand(server, [b'bookmarks'])
   ... 
   ...     runcommand(server, [b'bookmarks', b'bm3'])
   ...     f = open('a', 'ab')
   ...     f.write(b'a\n') and None
   ...     f.close()
   ...     runcommand(server, [b'commit', b'-Amm'])
   ...     runcommand(server, [b'bookmarks'])
   ...     bprint(b'')
   *** runcommand bookmarks
   no bookmarks set
   *** runcommand bookmarks
      bm1                       1:d3a0a68be6de
      bm2                       1:d3a0a68be6de
   *** runcommand bookmarks
    * bm1                       1:d3a0a68be6de
      bm2                       1:d3a0a68be6de
   *** runcommand bookmarks bm3
   *** runcommand commit -Amm
   *** runcommand bookmarks
      bm1                       1:d3a0a68be6de
      bm2                       1:d3a0a68be6de
    * bm3                       2:aef17e88f5f0
   
 
   >>> import os
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def tagscache(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'id', b'-t', b'-r', b'0'])
   ...     os.system('hg tag -r 0 foo')
   ...     runcommand(server, [b'id', b'-t', b'-r', b'0'])
   *** runcommand id -t -r 0
   
   *** runcommand id -t -r 0
   foo
 
   >>> import os
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def setphase(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'phase', b'-r', b'.'])
   ...     os.system('hg phase -r . -p')
   ...     runcommand(server, [b'phase', b'-r', b'.'])
   *** runcommand phase -r .
   3: draft
   *** runcommand phase -r .
   3: public
 
   $ echo a >> a
   >>> from hgclient import bprint, check, readchannel, runcommand
   >>> @check
   ... def rollback(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'phase', b'-r', b'.', b'-p'])
   ...     runcommand(server, [b'commit', b'-Am.'])
   ...     runcommand(server, [b'rollback'])
   ...     runcommand(server, [b'phase', b'-r', b'.'])
   ...     bprint(b'')
   *** runcommand phase -r . -p
   no phases changed
   *** runcommand commit -Am.
   *** runcommand rollback
   repository tip rolled back to revision 3 (undo commit)
   working directory now based on revision 3
   *** runcommand phase -r .
   3: public
   
 
   >>> import os
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def branch(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'branch'])
   ...     os.system('hg branch foo')
   ...     runcommand(server, [b'branch'])
   ...     os.system('hg branch default')
   *** runcommand branch
   default
   marked working directory as branch foo
   (branches are permanent and global, did you want a bookmark?)
   *** runcommand branch
   foo
   marked working directory as branch default
   (branches are permanent and global, did you want a bookmark?)
 
   $ touch .hgignore
   >>> import os
   >>> from hgclient import bprint, check, readchannel, runcommand
   >>> @check
   ... def hgignore(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'commit', b'-Am.'])
   ...     f = open('ignored-file', 'ab')
   ...     f.write(b'') and None
   ...     f.close()
   ...     f = open('.hgignore', 'ab')
   ...     f.write(b'ignored-file')
   ...     f.close()
   ...     runcommand(server, [b'status', b'-i', b'-u'])
   ...     bprint(b'')
   *** runcommand commit -Am.
   adding .hgignore
   *** runcommand status -i -u
   I ignored-file
   
 
 cache of non-public revisions should be invalidated on repository change
 (issue4855):
 
   >>> import os
   >>> from hgclient import bprint, check, readchannel, runcommand
   >>> @check
   ... def phasesetscacheaftercommit(server):
   ...     readchannel(server)
   ...     # load _phasecache._phaserevs and _phasesets
   ...     runcommand(server, [b'log', b'-qr', b'draft()'])
   ...     # create draft commits by another process
   ...     for i in range(5, 7):
   ...         f = open('a', 'ab')
   ...         f.seek(0, os.SEEK_END)
   ...         f.write(b'a\n') and None
   ...         f.close()
   ...         os.system('hg commit -Aqm%d' % i)
   ...     # new commits should be listed as draft revisions
   ...     runcommand(server, [b'log', b'-qr', b'draft()'])
   ...     bprint(b'')
   *** runcommand log -qr draft()
   4:7966c8e3734d
   *** runcommand log -qr draft()
   4:7966c8e3734d
   5:41f6602d1c4f
   6:10501e202c35
   
 
   >>> import os
   >>> from hgclient import bprint, check, readchannel, runcommand
   >>> @check
   ... def phasesetscacheafterstrip(server):
   ...     readchannel(server)
   ...     # load _phasecache._phaserevs and _phasesets
   ...     runcommand(server, [b'log', b'-qr', b'draft()'])
   ...     # strip cached revisions by another process
   ...     os.system('hg --config extensions.strip= strip -q 5')
   ...     # shouldn't abort by "unknown revision '6'"
   ...     runcommand(server, [b'log', b'-qr', b'draft()'])
   ...     bprint(b'')
   *** runcommand log -qr draft()
   4:7966c8e3734d
   5:41f6602d1c4f
   6:10501e202c35
   *** runcommand log -qr draft()
   4:7966c8e3734d
   
 
 cache of phase roots should be invalidated on strip (issue3827):
 
   >>> import os
   >>> from hgclient import check, readchannel, runcommand, sep
   >>> @check
   ... def phasecacheafterstrip(server):
   ...     readchannel(server)
   ... 
   ...     # create new head, 5:731265503d86
   ...     runcommand(server, [b'update', b'-C', b'0'])
   ...     f = open('a', 'ab')
   ...     f.write(b'a\n') and None
   ...     f.close()
   ...     runcommand(server, [b'commit', b'-Am.', b'a'])
   ...     runcommand(server, [b'log', b'-Gq'])
   ... 
   ...     # make it public; draft marker moves to 4:7966c8e3734d
   ...     runcommand(server, [b'phase', b'-p', b'.'])
   ...     # load _phasecache.phaseroots
   ...     runcommand(server, [b'phase', b'.'], outfilter=sep)
   ... 
   ...     # strip 1::4 outside server
   ...     os.system('hg -q --config extensions.mq= strip 1')
   ... 
   ...     # shouldn't raise "7966c8e3734d: no node!"
   ...     runcommand(server, [b'branches'])
   *** runcommand update -C 0
   1 files updated, 0 files merged, 2 files removed, 0 files unresolved
   (leaving bookmark bm3)
   *** runcommand commit -Am. a
   created new head
   *** runcommand log -Gq
   @  5:731265503d86
   |
   | o  4:7966c8e3734d
   | |
   | o  3:b9b85890c400
   | |
   | o  2:aef17e88f5f0
   | |
   | o  1:d3a0a68be6de
   |/
   o  0:eff892de26ec
   
   *** runcommand phase -p .
   *** runcommand phase .
   5: public
   *** runcommand branches
   default                        1:731265503d86
 
 in-memory cache must be reloaded if transaction is aborted. otherwise
 changelog and manifest would have invalid node:
 
   $ echo a >> a
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def txabort(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'commit', b'--config', b'hooks.pretxncommit=false',
   ...                         b'-mfoo'])
   ...     runcommand(server, [b'verify'])
   *** runcommand commit --config hooks.pretxncommit=false -mfoo
   transaction abort!
   rollback completed
   abort: pretxncommit hook exited with status 1
    [255]
   *** runcommand verify
   checking changesets
   checking manifests
   crosschecking files in changesets and manifests
   checking files
   checked 2 changesets with 2 changes to 1 files
   $ hg revert --no-backup -aq
 
   $ cat >> .hg/hgrc << EOF
   > [experimental]
   > evolution.createmarkers=True
   > EOF
 
   >>> import os
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def obsolete(server):
   ...     readchannel(server)
   ... 
   ...     runcommand(server, [b'up', b'null'])
   ...     runcommand(server, [b'phase', b'-df', b'tip'])
   ...     cmd = 'hg debugobsolete `hg log -r tip --template {node}`'
   ...     if os.name == 'nt':
   ...         cmd = 'sh -c "%s"' % cmd # run in sh, not cmd.exe
   ...     os.system(cmd)
   ...     runcommand(server, [b'log', b'--hidden'])
   ...     runcommand(server, [b'log'])
   *** runcommand up null
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   *** runcommand phase -df tip
   obsoleted 1 changesets
   *** runcommand log --hidden
   changeset:   1:731265503d86
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   obsolete:    pruned
   summary:     .
   
   changeset:   0:eff892de26ec
   bookmark:    bm1
   bookmark:    bm2
   bookmark:    bm3
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
   *** runcommand log
   changeset:   0:eff892de26ec
   bookmark:    bm1
   bookmark:    bm2
   bookmark:    bm3
   tag:         tip
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     1
   
 
   $ cat <<EOF >> .hg/hgrc
   > [extensions]
   > mq =
   > EOF
 
   >>> import os
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def mqoutsidechanges(server):
   ...     readchannel(server)
   ... 
   ...     # load repo.mq
   ...     runcommand(server, [b'qapplied'])
   ...     os.system('hg qnew 0.diff')
   ...     # repo.mq should be invalidated
   ...     runcommand(server, [b'qapplied'])
   ... 
   ...     runcommand(server, [b'qpop', b'--all'])
   ...     os.system('hg qqueue --create foo')
   ...     # repo.mq should be recreated to point to new queue
   ...     runcommand(server, [b'qqueue', b'--active'])
   *** runcommand qapplied
   *** runcommand qapplied
   0.diff
   *** runcommand qpop --all
   popping 0.diff
   patch queue now empty
   *** runcommand qqueue --active
   foo
 
   $ cat <<'EOF' > ../dbgui.py
   > import os
   > import sys
   > from mercurial import commands, registrar
   > cmdtable = {}
   > command = registrar.command(cmdtable)
   > @command(b"debuggetpass", norepo=True)
   > def debuggetpass(ui):
   >     ui.write(b"%s\n" % ui.getpass())
   > @command(b"debugprompt", norepo=True)
   > def debugprompt(ui):
   >     ui.write(b"%s\n" % ui.prompt(b"prompt:"))
   > @command(b"debugpromptchoice", norepo=True)
   > def debugpromptchoice(ui):
   >     msg = b"promptchoice (y/n)? $$ &Yes $$ &No"
   >     ui.write(b"%d\n" % ui.promptchoice(msg))
   > @command(b"debugreadstdin", norepo=True)
   > def debugreadstdin(ui):
   >     ui.write(b"read: %r\n" % sys.stdin.read(1))
   > @command(b"debugwritestdout", norepo=True)
   > def debugwritestdout(ui):
   >     os.write(1, b"low-level stdout fd and\n")
   >     sys.stdout.write("stdout should be redirected to stderr\n")
   >     sys.stdout.flush()
   > EOF
   $ cat <<EOF >> .hg/hgrc
   > [extensions]
   > dbgui = ../dbgui.py
   > EOF
 
   >>> from hgclient import check, readchannel, runcommand, stringio
   >>> @check
   ... def getpass(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'debuggetpass', b'--config',
   ...                         b'ui.interactive=True'],
   ...                input=stringio(b'1234\n'))
   ...     runcommand(server, [b'debuggetpass', b'--config',
   ...                         b'ui.interactive=True'],
   ...                input=stringio(b'\n'))
   ...     runcommand(server, [b'debuggetpass', b'--config',
   ...                         b'ui.interactive=True'],
   ...                input=stringio(b''))
   ...     runcommand(server, [b'debugprompt', b'--config',
   ...                         b'ui.interactive=True'],
   ...                input=stringio(b'5678\n'))
   ...     runcommand(server, [b'debugreadstdin'])
   ...     runcommand(server, [b'debugwritestdout'])
   *** runcommand debuggetpass --config ui.interactive=True
   password: 1234
   *** runcommand debuggetpass --config ui.interactive=True
   password: 
   *** runcommand debuggetpass --config ui.interactive=True
   password: abort: response expected
    [255]
   *** runcommand debugprompt --config ui.interactive=True
   prompt: 5678
   *** runcommand debugreadstdin
   read: ''
   *** runcommand debugwritestdout
   low-level stdout fd and
   stdout should be redirected to stderr
 
 
 run commandserver in commandserver, which is silly but should work:
 
   >>> from hgclient import bprint, check, readchannel, runcommand, stringio
   >>> @check
   ... def nested(server):
   ...     bprint(b'%c, %r' % readchannel(server))
   ...     class nestedserver(object):
   ...         stdin = stringio(b'getencoding\n')
   ...         stdout = stringio()
   ...     runcommand(server, [b'serve', b'--cmdserver', b'pipe'],
   ...                output=nestedserver.stdout, input=nestedserver.stdin)
   ...     nestedserver.stdout.seek(0)
   ...     bprint(b'%c, %r' % readchannel(nestedserver))  # hello
   ...     bprint(b'%c, %r' % readchannel(nestedserver))  # getencoding
   o, 'capabilities: getencoding runcommand\nencoding: *\npid: *' (glob)
   *** runcommand serve --cmdserver pipe
   o, 'capabilities: getencoding runcommand\nencoding: *\npid: *' (glob)
   r, '*' (glob)
 
 
 start without repository:
 
   $ cd ..
 
   >>> from hgclient import bprint, check, readchannel, runcommand
   >>> @check
   ... def hellomessage(server):
   ...     ch, data = readchannel(server)
   ...     bprint(b'%c, %r' % (ch, data))
   ...     # run an arbitrary command to make sure the next thing the server
   ...     # sends isn't part of the hello message
   ...     runcommand(server, [b'id'])
   o, 'capabilities: getencoding runcommand\nencoding: *\npid: *' (glob)
   *** runcommand id
   abort: there is no Mercurial repository here (.hg not found)
    [255]
 
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def startwithoutrepo(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'init', b'repo2'])
   ...     runcommand(server, [b'id', b'-R', b'repo2'])
   *** runcommand init repo2
   *** runcommand id -R repo2
   000000000000 tip
 
 
 don't fall back to cwd if invalid -R path is specified (issue4805):
 
   $ cd repo
   $ hg serve --cmdserver pipe -R ../nonexistent
   abort: repository ../nonexistent not found!
   [255]
   $ cd ..
 
 
 structured message channel:
 
   $ cat <<'EOF' >> repo2/.hg/hgrc
   > [ui]
   > # server --config should precede repository option
   > message-output = stdio
   > EOF
 
   >>> from hgclient import bprint, checkwith, readchannel, runcommand
   >>> @checkwith(extraargs=[b'--config', b'ui.message-output=channel',
   ...                       b'--config', b'cmdserver.message-encodings=foo cbor'])
   ... def verify(server):
   ...     _ch, data = readchannel(server)
   ...     bprint(data)
   ...     runcommand(server, [b'-R', b'repo2', b'verify'])
   capabilities: getencoding runcommand
   encoding: ascii
   message-encoding: cbor
   pid: * (glob)
   pgid: * (glob) (no-windows !)
   *** runcommand -R repo2 verify
   message: '\xa2DdataTchecking changesets\nDtypeFstatus'
   message: '\xa6Ditem@Cpos\xf6EtopicHcheckingEtotal\xf6DtypeHprogressDunit@'
   message: '\xa2DdataSchecking manifests\nDtypeFstatus'
   message: '\xa6Ditem@Cpos\xf6EtopicHcheckingEtotal\xf6DtypeHprogressDunit@'
   message: '\xa2DdataX0crosschecking files in changesets and manifests\nDtypeFstatus'
   message: '\xa6Ditem@Cpos\xf6EtopicMcrosscheckingEtotal\xf6DtypeHprogressDunit@'
   message: '\xa2DdataOchecking files\nDtypeFstatus'
   message: '\xa6Ditem@Cpos\xf6EtopicHcheckingEtotal\xf6DtypeHprogressDunit@'
   message: '\xa2DdataX/checked 0 changesets with 0 changes to 0 files\nDtypeFstatus'
 
   >>> from hgclient import checkwith, readchannel, runcommand, stringio
   >>> @checkwith(extraargs=[b'--config', b'ui.message-output=channel',
   ...                       b'--config', b'cmdserver.message-encodings=cbor',
   ...                       b'--config', b'extensions.dbgui=dbgui.py'])
   ... def prompt(server):
   ...     readchannel(server)
   ...     interactive = [b'--config', b'ui.interactive=True']
   ...     runcommand(server, [b'debuggetpass'] + interactive,
   ...                input=stringio(b'1234\n'))
   ...     runcommand(server, [b'debugprompt'] + interactive,
   ...                input=stringio(b'5678\n'))
   ...     runcommand(server, [b'debugpromptchoice'] + interactive,
   ...                input=stringio(b'n\n'))
   *** runcommand debuggetpass --config ui.interactive=True
   message: '\xa3DdataJpassword: Hpassword\xf5DtypeFprompt'
   1234
   *** runcommand debugprompt --config ui.interactive=True
   message: '\xa3DdataGprompt:GdefaultAyDtypeFprompt'
    5678
   *** runcommand debugpromptchoice --config ui.interactive=True
   message: '\xa4Gchoices\x82\x82AyCYes\x82AnBNoDdataTpromptchoice (y/n)? GdefaultAyDtypeFprompt'
    1
 
 bad message encoding:
 
   $ hg serve --cmdserver pipe --config ui.message-output=channel
   abort: no supported message encodings: 
   [255]
   $ hg serve --cmdserver pipe --config ui.message-output=channel \
   > --config cmdserver.message-encodings='foo bar'
   abort: no supported message encodings: foo bar
   [255]
 
 unix domain socket:
 
   $ cd repo
   $ hg update -q
 
 #if unix-socket unix-permissions
 
   >>> from hgclient import bprint, check, readchannel, runcommand, stringio, unixserver
   >>> server = unixserver(b'.hg/server.sock', b'.hg/server.log')
   >>> def hellomessage(conn):
   ...     ch, data = readchannel(conn)
   ...     bprint(b'%c, %r' % (ch, data))
   ...     runcommand(conn, [b'id'])
   >>> check(hellomessage, server.connect)
   o, 'capabilities: getencoding runcommand\nencoding: *\npid: *' (glob)
   *** runcommand id
   eff892de26ec tip bm1/bm2/bm3
   >>> def unknowncommand(conn):
   ...     readchannel(conn)
   ...     conn.stdin.write(b'unknowncommand\n')
   >>> check(unknowncommand, server.connect)  # error sent to server.log
   >>> def serverinput(conn):
   ...     readchannel(conn)
   ...     patch = b"""
   ... # HG changeset patch
   ... # User test
   ... # Date 0 0
   ... 2
   ... 
   ... diff -r eff892de26ec -r 1ed24be7e7a0 a
   ... --- a/a
   ... +++ b/a
   ... @@ -1,1 +1,2 @@
   ...  1
   ... +2
   ... """
   ...     runcommand(conn, [b'import', b'-'], input=stringio(patch))
   ...     runcommand(conn, [b'log', b'-rtip', b'-q'])
   >>> check(serverinput, server.connect)
   *** runcommand import -
   applying patch from stdin
   *** runcommand log -rtip -q
   2:1ed24be7e7a0
   >>> server.shutdown()
 
   $ cat .hg/server.log
   listening at .hg/server.sock
   abort: unknown command unknowncommand
   killed!
   $ rm .hg/server.log
 
  if server crashed before hello, traceback will be sent to 'e' channel as
  last ditch:
 
   $ cat <<'EOF' > ../earlycrasher.py
   > from mercurial import commandserver, extensions
-  > def _serverequest(orig, ui, repo, conn, createcmdserver):
+  > def _serverequest(orig, ui, repo, conn, createcmdserver, prereposetups):
   >     def createcmdserver(*args, **kwargs):
   >         raise Exception('crash')
-  >     return orig(ui, repo, conn, createcmdserver)
+  >     return orig(ui, repo, conn, createcmdserver, prereposetups)
   > def extsetup(ui):
   >     extensions.wrapfunction(commandserver, b'_serverequest', _serverequest)
   > EOF
   $ cat <<EOF >> .hg/hgrc
   > [extensions]
   > earlycrasher = ../earlycrasher.py
   > EOF
   >>> from hgclient import bprint, check, readchannel, unixserver
   >>> server = unixserver(b'.hg/server.sock', b'.hg/server.log')
   >>> def earlycrash(conn):
   ...     while True:
   ...         try:
   ...             ch, data = readchannel(conn)
   ...             for l in data.splitlines(True):
   ...                 if not l.startswith(b'  '):
   ...                     bprint(b'%c, %r' % (ch, l))
   ...         except EOFError:
   ...             break
   >>> check(earlycrash, server.connect)
   e, 'Traceback (most recent call last):\n'
   e, 'Exception: crash\n'
   >>> server.shutdown()
 
   $ cat .hg/server.log | grep -v '^  '
   listening at .hg/server.sock
   Traceback (most recent call last):
   Exception: crash
   killed!
 #endif
 #if no-unix-socket
 
   $ hg serve --cmdserver unix -a .hg/server.sock
   abort: unsupported platform
   [255]
 
 #endif
 
   $ cd ..
 
 Test that accessing to invalid changelog cache is avoided at
 subsequent operations even if repo object is reused even after failure
 of transaction (see 0a7610758c42 also)
 
 "hg log" after failure of transaction is needed to detect invalid
 cache in repoview: this can't detect by "hg verify" only.
 
 Combination of "finalization" and "empty-ness of changelog" (2 x 2 =
 4) are tested, because '00changelog.i' are differently changed in each
 cases.
 
   $ cat > $TESTTMP/failafterfinalize.py <<EOF
   > # extension to abort transaction after finalization forcibly
   > from mercurial import commands, error, extensions, lock as lockmod
   > from mercurial import registrar
   > cmdtable = {}
   > command = registrar.command(cmdtable)
   > configtable = {}
   > configitem = registrar.configitem(configtable)
   > configitem(b'failafterfinalize', b'fail',
   >     default=None,
   > )
   > def fail(tr):
   >     raise error.Abort(b'fail after finalization')
   > def reposetup(ui, repo):
   >     class failrepo(repo.__class__):
   >         def commitctx(self, ctx, error=False):
   >             if self.ui.configbool(b'failafterfinalize', b'fail'):
   >                 # 'sorted()' by ASCII code on category names causes
   >                 # invoking 'fail' after finalization of changelog
   >                 # using "'cl-%i' % id(self)" as category name
   >                 self.currenttransaction().addfinalize(b'zzzzzzzz', fail)
   >             return super(failrepo, self).commitctx(ctx, error)
   >     repo.__class__ = failrepo
   > EOF
 
   $ hg init repo3
   $ cd repo3
 
   $ cat <<EOF >> $HGRCPATH
   > [ui]
   > logtemplate = {rev} {desc|firstline} ({files})\n
   > 
   > [extensions]
   > failafterfinalize = $TESTTMP/failafterfinalize.py
   > EOF
 
 - test failure with "empty changelog"
 
   $ echo foo > foo
   $ hg add foo
 
 (failure before finalization)
 
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def abort(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'commit',
   ...                         b'--config', b'hooks.pretxncommit=false',
   ...                         b'-mfoo'])
   ...     runcommand(server, [b'log'])
   ...     runcommand(server, [b'verify', b'-q'])
   *** runcommand commit --config hooks.pretxncommit=false -mfoo
   transaction abort!
   rollback completed
   abort: pretxncommit hook exited with status 1
    [255]
   *** runcommand log
   *** runcommand verify -q
 
 (failure after finalization)
 
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def abort(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'commit',
   ...                         b'--config', b'failafterfinalize.fail=true',
   ...                         b'-mfoo'])
   ...     runcommand(server, [b'log'])
   ...     runcommand(server, [b'verify', b'-q'])
   *** runcommand commit --config failafterfinalize.fail=true -mfoo
   transaction abort!
   rollback completed
   abort: fail after finalization
    [255]
   *** runcommand log
   *** runcommand verify -q
 
 - test failure with "not-empty changelog"
 
   $ echo bar > bar
   $ hg add bar
   $ hg commit -mbar bar
 
 (failure before finalization)
 
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def abort(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'commit',
   ...                         b'--config', b'hooks.pretxncommit=false',
   ...                         b'-mfoo', b'foo'])
   ...     runcommand(server, [b'log'])
   ...     runcommand(server, [b'verify', b'-q'])
   *** runcommand commit --config hooks.pretxncommit=false -mfoo foo
   transaction abort!
   rollback completed
   abort: pretxncommit hook exited with status 1
    [255]
   *** runcommand log
   0 bar (bar)
   *** runcommand verify -q
 
 (failure after finalization)
 
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def abort(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'commit',
   ...                         b'--config', b'failafterfinalize.fail=true',
   ...                         b'-mfoo', b'foo'])
   ...     runcommand(server, [b'log'])
   ...     runcommand(server, [b'verify', b'-q'])
   *** runcommand commit --config failafterfinalize.fail=true -mfoo foo
   transaction abort!
   rollback completed
   abort: fail after finalization
    [255]
   *** runcommand log
   0 bar (bar)
   *** runcommand verify -q
 
   $ cd ..
 
 Test symlink traversal over cached audited paths:
 -------------------------------------------------
 
 #if symlink
 
 set up symlink hell
 
   $ mkdir merge-symlink-out
   $ hg init merge-symlink
   $ cd merge-symlink
   $ touch base
   $ hg commit -qAm base
   $ ln -s ../merge-symlink-out a
   $ hg commit -qAm 'symlink a -> ../merge-symlink-out'
   $ hg up -q 0
   $ mkdir a
   $ touch a/poisoned
   $ hg commit -qAm 'file a/poisoned'
   $ hg log -G -T '{rev}: {desc}\n'
   @  2: file a/poisoned
   |
   | o  1: symlink a -> ../merge-symlink-out
   |/
   o  0: base
   
 
 try trivial merge after update: cache of audited paths should be discarded,
 and the merge should fail (issue5628)
 
   $ hg up -q null
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def merge(server):
   ...     readchannel(server)
   ...     # audit a/poisoned as a good path
   ...     runcommand(server, [b'up', b'-qC', b'2'])
   ...     runcommand(server, [b'up', b'-qC', b'1'])
   ...     # here a is a symlink, so a/poisoned is bad
   ...     runcommand(server, [b'merge', b'2'])
   *** runcommand up -qC 2
   *** runcommand up -qC 1
   *** runcommand merge 2
   abort: path 'a/poisoned' traverses symbolic link 'a'
    [255]
   $ ls ../merge-symlink-out
 
 cache of repo.auditor should be discarded, so matcher would never traverse
 symlinks:
 
   $ hg up -qC 0
   $ touch ../merge-symlink-out/poisoned
   >>> from hgclient import check, readchannel, runcommand
   >>> @check
   ... def files(server):
   ...     readchannel(server)
   ...     runcommand(server, [b'up', b'-qC', b'2'])
   ...     # audit a/poisoned as a good path
   ...     runcommand(server, [b'files', b'a/poisoned'])
   ...     runcommand(server, [b'up', b'-qC', b'0'])
   ...     runcommand(server, [b'up', b'-qC', b'1'])
   ...     # here 'a' is a symlink, so a/poisoned should be warned
   ...     runcommand(server, [b'files', b'a/poisoned'])
   *** runcommand up -qC 2
   *** runcommand files a/poisoned
   a/poisoned
   *** runcommand up -qC 0
   *** runcommand up -qC 1
   *** runcommand files a/poisoned
   abort: path 'a/poisoned' traverses symbolic link 'a'
    [255]
 
   $ cd ..
 
 #endif