hgext/chgserver.py
author Jun Wu <quark@fb.com>
Mon, 14 Mar 2016 12:52:35 +0000
changeset 28516 3bf2892f685f
parent 28514 0747ef2c4ab2
child 28535 aa082a8125da
permissions -rw-r--r--
chgserver: handle ParseError during validate Currently the validate command in chgserver expects config can be loaded without issues but the config can be broken and chg will print a stacktrace instead of the parsing error, if a chg server is already running. This patch adds a handler for ParseError in validate and a new instruction "exit" to make the client exit without abortmsg. A test is also added to make sure it will behave as expected.
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# chgserver.py - command server extension for cHg
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#
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# Copyright 2011 Yuya Nishihara <yuya@tcha.org>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""command server extension for cHg (EXPERIMENTAL)
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'S' channel (read/write)
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    propagate ui.system() request to client
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'attachio' command
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    attach client's stdio passed by sendmsg()
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'chdir' command
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    change current directory
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'getpager' command
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    checks if pager is enabled and which pager should be executed
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'setenv' command
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    replace os.environ completely
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'setumask' command
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    set umask
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'validate' command
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    reload the config and check if the server is up to date
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Config
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------
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::
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  [chgserver]
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  idletimeout = 3600 # seconds, after which an idle server will exit
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  skiphash = False   # whether to skip config or env change checks
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"""
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from __future__ import absolute_import
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import SocketServer
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import errno
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import inspect
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import os
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import re
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import struct
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import sys
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import threading
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import time
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import traceback
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from mercurial.i18n import _
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from mercurial import (
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    cmdutil,
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    commands,
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    commandserver,
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    dispatch,
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    error,
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    extensions,
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    osutil,
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    util,
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)
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# Note for extension authors: ONLY specify testedwith = 'internal' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = 'internal'
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_log = commandserver.log
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def _hashlist(items):
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    """return sha1 hexdigest for a list"""
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    return util.sha1(str(items)).hexdigest()
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# sensitive config sections affecting confighash
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_configsections = [
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    'extdiff',  # uisetup will register new commands
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    'extensions',
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]
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# sensitive environment variables affecting confighash
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_envre = re.compile(r'''\A(?:
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                    CHGHG
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                    |HG.*
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                    |LANG(?:UAGE)?
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                    |LC_.*
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                    |LD_.*
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                    |PATH
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                    |PYTHON.*
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                    |TERM(?:INFO)?
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                    |TZ
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                    )\Z''', re.X)
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def _confighash(ui):
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    """return a quick hash for detecting config/env changes
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    confighash is the hash of sensitive config items and environment variables.
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    for chgserver, it is designed that once confighash changes, the server is
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    not qualified to serve its client and should redirect the client to a new
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    server. different from mtimehash, confighash change will not mark the
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    server outdated and exit since the user can have different configs at the
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    same time.
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    """
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    sectionitems = []
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    for section in _configsections:
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        sectionitems.append(ui.configitems(section))
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    sectionhash = _hashlist(sectionitems)
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    envitems = [(k, v) for k, v in os.environ.iteritems() if _envre.match(k)]
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    envhash = _hashlist(sorted(envitems))
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    return sectionhash[:6] + envhash[:6]
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def _getmtimepaths(ui):
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    """get a list of paths that should be checked to detect change
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    The list will include:
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    - extensions (will not cover all files for complex extensions)
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    - mercurial/__version__.py
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    - python binary
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    """
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    modules = [m for n, m in extensions.extensions(ui)]
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    try:
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        from mercurial import __version__
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        modules.append(__version__)
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    except ImportError:
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        pass
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    files = [sys.executable]
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    for m in modules:
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        try:
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            files.append(inspect.getabsfile(m))
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        except TypeError:
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            pass
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    return sorted(set(files))
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def _mtimehash(paths):
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    """return a quick hash for detecting file changes
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    mtimehash calls stat on given paths and calculate a hash based on size and
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    mtime of each file. mtimehash does not read file content because reading is
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    expensive. therefore it's not 100% reliable for detecting content changes.
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    it's possible to return different hashes for same file contents.
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    it's also possible to return a same hash for different file contents for
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    some carefully crafted situation.
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    for chgserver, it is designed that once mtimehash changes, the server is
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    considered outdated immediately and should no longer provide service.
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    """
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    def trystat(path):
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        try:
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            st = os.stat(path)
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            return (st.st_mtime, st.st_size)
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        except OSError:
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            # could be ENOENT, EPERM etc. not fatal in any case
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            pass
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    return _hashlist(map(trystat, paths))[:12]
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class hashstate(object):
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    """a structure storing confighash, mtimehash, paths used for mtimehash"""
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    def __init__(self, confighash, mtimehash, mtimepaths):
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        self.confighash = confighash
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        self.mtimehash = mtimehash
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        self.mtimepaths = mtimepaths
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    @staticmethod
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    def fromui(ui, mtimepaths=None):
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        if mtimepaths is None:
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            mtimepaths = _getmtimepaths(ui)
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        confighash = _confighash(ui)
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        mtimehash = _mtimehash(mtimepaths)
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        _log('confighash = %s mtimehash = %s\n' % (confighash, mtimehash))
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        return hashstate(confighash, mtimehash, mtimepaths)
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# copied from hgext/pager.py:uisetup()
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def _setuppagercmd(ui, options, cmd):
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    if not ui.formatted():
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        return
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    p = ui.config("pager", "pager", os.environ.get("PAGER"))
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    usepager = False
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    always = util.parsebool(options['pager'])
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    auto = options['pager'] == 'auto'
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    if not p:
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        pass
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    elif always:
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        usepager = True
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    elif not auto:
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        usepager = False
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    else:
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        attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff']
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        attend = ui.configlist('pager', 'attend', attended)
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        ignore = ui.configlist('pager', 'ignore')
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        cmds, _ = cmdutil.findcmd(cmd, commands.table)
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        for cmd in cmds:
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            var = 'attend-%s' % cmd
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            if ui.config('pager', var):
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                usepager = ui.configbool('pager', var)
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                break
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            if (cmd in attend or
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                (cmd not in ignore and not attend)):
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                usepager = True
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                break
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    if usepager:
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        ui.setconfig('ui', 'formatted', ui.formatted(), 'pager')
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        ui.setconfig('ui', 'interactive', False, 'pager')
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        return p
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_envvarre = re.compile(r'\$[a-zA-Z_]+')
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def _clearenvaliases(cmdtable):
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    """Remove stale command aliases referencing env vars; variable expansion
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    is done at dispatch.addaliases()"""
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    for name, tab in cmdtable.items():
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        cmddef = tab[0]
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        if (isinstance(cmddef, dispatch.cmdalias) and
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            not cmddef.definition.startswith('!') and  # shell alias
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            _envvarre.search(cmddef.definition)):
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            del cmdtable[name]
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def _newchgui(srcui, csystem):
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    class chgui(srcui.__class__):
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        def __init__(self, src=None):
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            super(chgui, self).__init__(src)
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            if src:
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                self._csystem = getattr(src, '_csystem', csystem)
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            else:
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                self._csystem = csystem
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        def system(self, cmd, environ=None, cwd=None, onerr=None,
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                   errprefix=None):
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            # copied from mercurial/util.py:system()
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            self.flush()
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            def py2shell(val):
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                if val is None or val is False:
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                    return '0'
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                if val is True:
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                    return '1'
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                return str(val)
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            env = os.environ.copy()
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            if environ:
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                env.update((k, py2shell(v)) for k, v in environ.iteritems())
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            env['HG'] = util.hgexecutable()
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            rc = self._csystem(cmd, env, cwd)
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            if rc and onerr:
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                errmsg = '%s %s' % (os.path.basename(cmd.split(None, 1)[0]),
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                                    util.explainexit(rc)[0])
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                if errprefix:
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                    errmsg = '%s: %s' % (errprefix, errmsg)
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                raise onerr(errmsg)
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            return rc
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    return chgui(srcui)
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def _renewui(srcui, args=None):
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    if not args:
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        args = []
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    newui = srcui.__class__()
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    for a in ['fin', 'fout', 'ferr', 'environ']:
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        setattr(newui, a, getattr(srcui, a))
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    if util.safehasattr(srcui, '_csystem'):
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        newui._csystem = srcui._csystem
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    # load wd and repo config, copied from dispatch.py
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    cwds = dispatch._earlygetopt(['--cwd'], args)
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    cwd = cwds and os.path.realpath(cwds[-1]) or None
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    rpath = dispatch._earlygetopt(["-R", "--repository", "--repo"], args)
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    path, newui = dispatch._getlocal(newui, rpath, wd=cwd)
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    # internal config: extensions.chgserver
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    # copy it. it can only be overrided from command line.
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   278
    newui.setconfig('extensions', 'chgserver',
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   279
                    srcui.config('extensions', 'chgserver'), '--config')
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   280
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   281
    # command line args
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   282
    dispatch._parseconfig(newui, dispatch._earlygetopt(['--config'], args))
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diff changeset
   283
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   284
    # stolen from tortoisehg.util.copydynamicconfig()
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   285
    for section, name, value in srcui.walkconfig():
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   286
        source = srcui.configsource(section, name)
28264
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   287
        if ':' in source or source == '--config':
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   288
            # path:line or command line
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   289
            continue
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   290
        if source == 'none':
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   291
            # ui.configsource returns 'none' by default
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diff changeset
   292
            source = ''
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diff changeset
   293
        newui.setconfig(section, name, value, source)
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diff changeset
   294
    return newui
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   295
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   296
class channeledsystem(object):
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   297
    """Propagate ui.system() request in the following format:
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   298
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   299
    payload length (unsigned int),
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   300
    cmd, '\0',
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   301
    cwd, '\0',
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   302
    envkey, '=', val, '\0',
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   303
    ...
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   304
    envkey, '=', val
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diff changeset
   305
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   306
    and waits:
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parents:
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   307
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   308
    exitcode length (unsigned int),
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   309
    exitcode (int)
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   310
    """
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   311
    def __init__(self, in_, out, channel):
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   312
        self.in_ = in_
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   313
        self.out = out
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   314
        self.channel = channel
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   315
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   316
    def __call__(self, cmd, environ, cwd):
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0747ef2c4ab2 chgserver: resolve relative path before sending via system channel
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   317
        args = [util.quotecommand(cmd), os.path.abspath(cwd or '.')]
27792
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parents:
diff changeset
   318
        args.extend('%s=%s' % (k, v) for k, v in environ.iteritems())
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parents:
diff changeset
   319
        data = '\0'.join(args)
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parents:
diff changeset
   320
        self.out.write(struct.pack('>cI', self.channel, len(data)))
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parents:
diff changeset
   321
        self.out.write(data)
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parents:
diff changeset
   322
        self.out.flush()
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parents:
diff changeset
   323
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parents:
diff changeset
   324
        length = self.in_.read(4)
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parents:
diff changeset
   325
        length, = struct.unpack('>I', length)
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parents:
diff changeset
   326
        if length != 4:
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parents:
diff changeset
   327
            raise error.Abort(_('invalid response'))
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Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   328
        rc, = struct.unpack('>i', self.in_.read(4))
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parents:
diff changeset
   329
        return rc
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parents:
diff changeset
   330
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parents:
diff changeset
   331
_iochannels = [
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diff changeset
   332
    # server.ch, ui.fp, mode
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   333
    ('cin', 'fin', 'rb'),
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   334
    ('cout', 'fout', 'wb'),
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   335
    ('cerr', 'ferr', 'wb'),
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   336
]
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Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   337
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   338
class chgcmdserver(commandserver.server):
28328
e00e57d83653 chgserver: pass hashstate and base server address to chgcmdserver
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parents: 28327
diff changeset
   339
    def __init__(self, ui, repo, fin, fout, sock, hashstate, baseaddress):
27792
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   340
        super(chgcmdserver, self).__init__(
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   341
            _newchgui(ui, channeledsystem(fin, fout, 'S')), repo, fin, fout)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   342
        self.clientsock = sock
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   343
        self._oldios = []  # original (self.ch, ui.fp, fd) before "attachio"
28328
e00e57d83653 chgserver: pass hashstate and base server address to chgcmdserver
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diff changeset
   344
        self.hashstate = hashstate
e00e57d83653 chgserver: pass hashstate and base server address to chgcmdserver
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diff changeset
   345
        self.baseaddress = baseaddress
28350
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Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   346
        if hashstate is not None:
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diff changeset
   347
            self.capabilities = self.capabilities.copy()
8f9661d1637b chgserver: implement validate command
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diff changeset
   348
            self.capabilities['validate'] = chgcmdserver.validate
27792
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parents:
diff changeset
   349
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diff changeset
   350
    def cleanup(self):
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diff changeset
   351
        # dispatch._runcatch() does not flush outputs if exception is not
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   352
        # handled by dispatch._dispatch()
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parents:
diff changeset
   353
        self.ui.flush()
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   354
        self._restoreio()
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parents:
diff changeset
   355
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   356
    def attachio(self):
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Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   357
        """Attach to client's stdio passed via unix domain socket; all
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   358
        channels except cresult will no longer be used
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   359
        """
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   360
        # tell client to sendmsg() with 1-byte payload, which makes it
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   361
        # distinctive from "attachio\n" command consumed by client.read()
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   362
        self.clientsock.sendall(struct.pack('>cI', 'I', 1))
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   363
        clientfds = osutil.recvfds(self.clientsock.fileno())
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   364
        _log('received fds: %r\n' % clientfds)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   365
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   366
        ui = self.ui
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   367
        ui.flush()
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   368
        first = self._saveio()
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   369
        for fd, (cn, fn, mode) in zip(clientfds, _iochannels):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   370
            assert fd > 0
980957333cfa chgserver: import background server extension from cHg
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parents:
diff changeset
   371
            fp = getattr(ui, fn)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   372
            os.dup2(fd, fp.fileno())
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   373
            os.close(fd)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   374
            if not first:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   375
                continue
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   376
            # reset buffering mode when client is first attached. as we want
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   377
            # to see output immediately on pager, the mode stays unchanged
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   378
            # when client re-attached. ferr is unchanged because it should
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   379
            # be unbuffered no matter if it is a tty or not.
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   380
            if fn == 'ferr':
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   381
                newfp = fp
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   382
            else:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   383
                # make it line buffered explicitly because the default is
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   384
                # decided on first write(), where fout could be a pager.
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   385
                if fp.isatty():
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   386
                    bufsize = 1  # line buffered
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   387
                else:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   388
                    bufsize = -1  # system default
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   389
                newfp = os.fdopen(fp.fileno(), mode, bufsize)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   390
                setattr(ui, fn, newfp)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   391
            setattr(self, cn, newfp)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   392
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   393
        self.cresult.write(struct.pack('>i', len(clientfds)))
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   394
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   395
    def _saveio(self):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   396
        if self._oldios:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   397
            return False
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   398
        ui = self.ui
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   399
        for cn, fn, _mode in _iochannels:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   400
            ch = getattr(self, cn)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   401
            fp = getattr(ui, fn)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   402
            fd = os.dup(fp.fileno())
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   403
            self._oldios.append((ch, fp, fd))
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   404
        return True
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   405
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   406
    def _restoreio(self):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   407
        ui = self.ui
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   408
        for (ch, fp, fd), (cn, fn, _mode) in zip(self._oldios, _iochannels):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   409
            newfp = getattr(ui, fn)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   410
            # close newfp while it's associated with client; otherwise it
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   411
            # would be closed when newfp is deleted
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   412
            if newfp is not fp:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   413
                newfp.close()
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   414
            # restore original fd: fp is open again
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   415
            os.dup2(fd, fp.fileno())
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   416
            os.close(fd)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   417
            setattr(self, cn, ch)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   418
            setattr(ui, fn, fp)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   419
        del self._oldios[:]
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   420
28350
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   421
    def validate(self):
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   422
        """Reload the config and check if the server is up to date
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   423
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   424
        Read a list of '\0' separated arguments.
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   425
        Write a non-empty list of '\0' separated instruction strings or '\0'
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   426
        if the list is empty.
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   427
        An instruction string could be either:
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   428
            - "unlink $path", the client should unlink the path to stop the
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   429
              outdated server.
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   430
            - "redirect $path", the client should try to connect to another
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   431
              server instead.
28516
3bf2892f685f chgserver: handle ParseError during validate
Jun Wu <quark@fb.com>
parents: 28514
diff changeset
   432
            - "exit $n", the client should exit directly with code n.
3bf2892f685f chgserver: handle ParseError during validate
Jun Wu <quark@fb.com>
parents: 28514
diff changeset
   433
              This may happen if we cannot parse the config.
28350
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   434
        """
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   435
        args = self._readlist()
28516
3bf2892f685f chgserver: handle ParseError during validate
Jun Wu <quark@fb.com>
parents: 28514
diff changeset
   436
        try:
3bf2892f685f chgserver: handle ParseError during validate
Jun Wu <quark@fb.com>
parents: 28514
diff changeset
   437
            self.ui = _renewui(self.ui, args)
3bf2892f685f chgserver: handle ParseError during validate
Jun Wu <quark@fb.com>
parents: 28514
diff changeset
   438
        except error.ParseError as inst:
3bf2892f685f chgserver: handle ParseError during validate
Jun Wu <quark@fb.com>
parents: 28514
diff changeset
   439
            dispatch._formatparse(self.ui.warn, inst)
3bf2892f685f chgserver: handle ParseError during validate
Jun Wu <quark@fb.com>
parents: 28514
diff changeset
   440
            self.ui.flush()
3bf2892f685f chgserver: handle ParseError during validate
Jun Wu <quark@fb.com>
parents: 28514
diff changeset
   441
            self.cresult.write('exit 255')
3bf2892f685f chgserver: handle ParseError during validate
Jun Wu <quark@fb.com>
parents: 28514
diff changeset
   442
            return
28350
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   443
        newhash = hashstate.fromui(self.ui, self.hashstate.mtimepaths)
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   444
        insts = []
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   445
        if newhash.mtimehash != self.hashstate.mtimehash:
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   446
            addr = _hashaddress(self.baseaddress, self.hashstate.confighash)
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   447
            insts.append('unlink %s' % addr)
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   448
        if newhash.confighash != self.hashstate.confighash:
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   449
            addr = _hashaddress(self.baseaddress, newhash.confighash)
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   450
            insts.append('redirect %s' % addr)
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   451
        _log('validate: %s\n' % insts)
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   452
        self.cresult.write('\0'.join(insts) or '\0')
8f9661d1637b chgserver: implement validate command
Jun Wu <quark@fb.com>
parents: 28342
diff changeset
   453
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   454
    def chdir(self):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   455
        """Change current directory
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   456
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   457
        Note that the behavior of --cwd option is bit different from this.
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   458
        It does not affect --config parameter.
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   459
        """
28158
7cc57a531f0c chgserver: use _readlist and _readstr
Jun Wu <quark@fb.com>
parents: 28014
diff changeset
   460
        path = self._readstr()
7cc57a531f0c chgserver: use _readlist and _readstr
Jun Wu <quark@fb.com>
parents: 28014
diff changeset
   461
        if not path:
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   462
            return
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   463
        _log('chdir to %r\n' % path)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   464
        os.chdir(path)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   465
28159
d2d04d1d2f92 chgserver: add setumask method
Jun Wu <quark@fb.com>
parents: 28158
diff changeset
   466
    def setumask(self):
d2d04d1d2f92 chgserver: add setumask method
Jun Wu <quark@fb.com>
parents: 28158
diff changeset
   467
        """Change umask"""
d2d04d1d2f92 chgserver: add setumask method
Jun Wu <quark@fb.com>
parents: 28158
diff changeset
   468
        mask = struct.unpack('>I', self._read(4))[0]
d2d04d1d2f92 chgserver: add setumask method
Jun Wu <quark@fb.com>
parents: 28158
diff changeset
   469
        _log('setumask %r\n' % mask)
d2d04d1d2f92 chgserver: add setumask method
Jun Wu <quark@fb.com>
parents: 28158
diff changeset
   470
        os.umask(mask)
d2d04d1d2f92 chgserver: add setumask method
Jun Wu <quark@fb.com>
parents: 28158
diff changeset
   471
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   472
    def getpager(self):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   473
        """Read cmdargs and write pager command to r-channel if enabled
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   474
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   475
        If pager isn't enabled, this writes '\0' because channeledoutput
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   476
        does not allow to write empty data.
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   477
        """
28158
7cc57a531f0c chgserver: use _readlist and _readstr
Jun Wu <quark@fb.com>
parents: 28014
diff changeset
   478
        args = self._readlist()
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   479
        try:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   480
            cmd, _func, args, options, _cmdoptions = dispatch._parse(self.ui,
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   481
                                                                     args)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   482
        except (error.Abort, error.AmbiguousCommand, error.CommandError,
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   483
                error.UnknownCommand):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   484
            cmd = None
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   485
            options = {}
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   486
        if not cmd or 'pager' not in options:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   487
            self.cresult.write('\0')
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   488
            return
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   489
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   490
        pagercmd = _setuppagercmd(self.ui, options, cmd)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   491
        if pagercmd:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   492
            self.cresult.write(pagercmd)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   493
        else:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   494
            self.cresult.write('\0')
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   495
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   496
    def setenv(self):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   497
        """Clear and update os.environ
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   498
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   499
        Note that not all variables can make an effect on the running process.
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   500
        """
28158
7cc57a531f0c chgserver: use _readlist and _readstr
Jun Wu <quark@fb.com>
parents: 28014
diff changeset
   501
        l = self._readlist()
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   502
        try:
28158
7cc57a531f0c chgserver: use _readlist and _readstr
Jun Wu <quark@fb.com>
parents: 28014
diff changeset
   503
            newenv = dict(s.split('=', 1) for s in l)
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   504
        except ValueError:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   505
            raise ValueError('unexpected value in setenv request')
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   506
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   507
        diffkeys = set(k for k in set(os.environ.keys() + newenv.keys())
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   508
                       if os.environ.get(k) != newenv.get(k))
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   509
        _log('change env: %r\n' % sorted(diffkeys))
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   510
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   511
        os.environ.clear()
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   512
        os.environ.update(newenv)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   513
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   514
        if set(['HGPLAIN', 'HGPLAINEXCEPT']) & diffkeys:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   515
            # reload config so that ui.plain() takes effect
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   516
            self.ui = _renewui(self.ui)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   517
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   518
        _clearenvaliases(commands.table)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   519
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   520
    capabilities = commandserver.server.capabilities.copy()
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   521
    capabilities.update({'attachio': attachio,
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   522
                         'chdir': chdir,
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   523
                         'getpager': getpager,
28159
d2d04d1d2f92 chgserver: add setumask method
Jun Wu <quark@fb.com>
parents: 28158
diff changeset
   524
                         'setenv': setenv,
d2d04d1d2f92 chgserver: add setumask method
Jun Wu <quark@fb.com>
parents: 28158
diff changeset
   525
                         'setumask': setumask})
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   526
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   527
# copied from mercurial/commandserver.py
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   528
class _requesthandler(SocketServer.StreamRequestHandler):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   529
    def handle(self):
28014
83fc0c055664 chgserver: create new process group after fork (issue5051)
Jun Wu <quark@fb.com>
parents: 27793
diff changeset
   530
        # use a different process group from the master process, making this
83fc0c055664 chgserver: create new process group after fork (issue5051)
Jun Wu <quark@fb.com>
parents: 27793
diff changeset
   531
        # process pass kernel "is_current_pgrp_orphaned" check so signals like
83fc0c055664 chgserver: create new process group after fork (issue5051)
Jun Wu <quark@fb.com>
parents: 27793
diff changeset
   532
        # SIGTSTP, SIGTTIN, SIGTTOU are not ignored.
83fc0c055664 chgserver: create new process group after fork (issue5051)
Jun Wu <quark@fb.com>
parents: 27793
diff changeset
   533
        os.setpgid(0, 0)
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   534
        ui = self.server.ui
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   535
        repo = self.server.repo
28511
ff5f923fca3c cmdserver: write early exception to 'e' channel in 'unix' mode
Yuya Nishihara <yuya@tcha.org>
parents: 28482
diff changeset
   536
        sv = None
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   537
        try:
28511
ff5f923fca3c cmdserver: write early exception to 'e' channel in 'unix' mode
Yuya Nishihara <yuya@tcha.org>
parents: 28482
diff changeset
   538
            sv = chgcmdserver(ui, repo, self.rfile, self.wfile, self.connection,
ff5f923fca3c cmdserver: write early exception to 'e' channel in 'unix' mode
Yuya Nishihara <yuya@tcha.org>
parents: 28482
diff changeset
   539
                              self.server.hashstate, self.server.baseaddress)
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   540
            try:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   541
                sv.serve()
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   542
            # handle exceptions that may be raised by command server. most of
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   543
            # known exceptions are caught by dispatch.
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   544
            except error.Abort as inst:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   545
                ui.warn(_('abort: %s\n') % inst)
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   546
            except IOError as inst:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   547
                if inst.errno != errno.EPIPE:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   548
                    raise
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   549
            except KeyboardInterrupt:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   550
                pass
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   551
            finally:
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   552
                sv.cleanup()
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   553
        except: # re-raises
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   554
            # also write traceback to error channel. otherwise client cannot
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   555
            # see it because it is written to server's stderr by default.
28511
ff5f923fca3c cmdserver: write early exception to 'e' channel in 'unix' mode
Yuya Nishihara <yuya@tcha.org>
parents: 28482
diff changeset
   556
            if sv:
ff5f923fca3c cmdserver: write early exception to 'e' channel in 'unix' mode
Yuya Nishihara <yuya@tcha.org>
parents: 28482
diff changeset
   557
                cerr = sv.cerr
ff5f923fca3c cmdserver: write early exception to 'e' channel in 'unix' mode
Yuya Nishihara <yuya@tcha.org>
parents: 28482
diff changeset
   558
            else:
ff5f923fca3c cmdserver: write early exception to 'e' channel in 'unix' mode
Yuya Nishihara <yuya@tcha.org>
parents: 28482
diff changeset
   559
                cerr = commandserver.channeledoutput(self.wfile, 'e')
ff5f923fca3c cmdserver: write early exception to 'e' channel in 'unix' mode
Yuya Nishihara <yuya@tcha.org>
parents: 28482
diff changeset
   560
            traceback.print_exc(file=cerr)
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   561
            raise
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   562
28223
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   563
def _tempaddress(address):
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   564
    return '%s.%d.tmp' % (address, os.getpid())
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   565
28326
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   566
def _hashaddress(address, hashstr):
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   567
    return '%s-%s' % (address, hashstr)
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   568
28223
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   569
class AutoExitMixIn:  # use old-style to comply with SocketServer design
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   570
    lastactive = time.time()
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   571
    idletimeout = 3600  # default 1 hour
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   572
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   573
    def startautoexitthread(self):
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   574
        # note: the auto-exit check here is cheap enough to not use a thread,
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   575
        # be done in serve_forever. however SocketServer is hook-unfriendly,
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   576
        # you simply cannot hook serve_forever without copying a lot of code.
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   577
        # besides, serve_forever's docstring suggests using thread.
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   578
        thread = threading.Thread(target=self._autoexitloop)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   579
        thread.daemon = True
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   580
        thread.start()
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   581
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   582
    def _autoexitloop(self, interval=1):
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   583
        while True:
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   584
            time.sleep(interval)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   585
            if not self.issocketowner():
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   586
                _log('%s is not owned, exiting.\n' % self.server_address)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   587
                break
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   588
            if time.time() - self.lastactive > self.idletimeout:
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   589
                _log('being idle too long. exiting.\n')
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   590
                break
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   591
        self.shutdown()
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   592
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   593
    def process_request(self, request, address):
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   594
        self.lastactive = time.time()
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   595
        return SocketServer.ForkingMixIn.process_request(
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   596
            self, request, address)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   597
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   598
    def server_bind(self):
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   599
        # use a unique temp address so we can stat the file and do ownership
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   600
        # check later
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   601
        tempaddress = _tempaddress(self.server_address)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   602
        self.socket.bind(tempaddress)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   603
        self._socketstat = os.stat(tempaddress)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   604
        # rename will replace the old socket file if exists atomically. the
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   605
        # old server will detect ownership change and exit.
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   606
        util.rename(tempaddress, self.server_address)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   607
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   608
    def issocketowner(self):
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   609
        try:
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   610
            stat = os.stat(self.server_address)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   611
            return (stat.st_ino == self._socketstat.st_ino and
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   612
                    stat.st_mtime == self._socketstat.st_mtime)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   613
        except OSError:
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   614
            return False
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   615
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   616
    def unlinksocketfile(self):
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   617
        if not self.issocketowner():
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   618
            return
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   619
        # it is possible to have a race condition here that we may
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   620
        # remove another server's socket file. but that's okay
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   621
        # since that server will detect and exit automatically and
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   622
        # the client will start a new server on demand.
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   623
        try:
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   624
            os.unlink(self.server_address)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   625
        except OSError as exc:
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   626
            if exc.errno != errno.ENOENT:
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   627
                raise
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   628
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   629
class chgunixservice(commandserver.unixservice):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   630
    def init(self):
28326
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   631
        self._inithashstate()
28223
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   632
        class cls(AutoExitMixIn, SocketServer.ForkingMixIn,
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   633
                  SocketServer.UnixStreamServer):
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   634
            ui = self.ui
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   635
            repo = self.repo
28328
e00e57d83653 chgserver: pass hashstate and base server address to chgcmdserver
Jun Wu <quark@fb.com>
parents: 28327
diff changeset
   636
            hashstate = self.hashstate
e00e57d83653 chgserver: pass hashstate and base server address to chgcmdserver
Jun Wu <quark@fb.com>
parents: 28327
diff changeset
   637
            baseaddress = self.baseaddress
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   638
        self.server = cls(self.address, _requesthandler)
28223
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   639
        self.server.idletimeout = self.ui.configint(
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   640
            'chgserver', 'idletimeout', self.server.idletimeout)
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   641
        self.server.startautoexitthread()
28326
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   642
        self._createsymlink()
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   643
28326
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   644
    def _inithashstate(self):
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   645
        self.baseaddress = self.address
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   646
        if self.ui.configbool('chgserver', 'skiphash', False):
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   647
            self.hashstate = None
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   648
            return
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   649
        self.hashstate = hashstate.fromui(self.ui)
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   650
        self.address = _hashaddress(self.address, self.hashstate.confighash)
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   651
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   652
    def _createsymlink(self):
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   653
        if self.baseaddress == self.address:
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   654
            return
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   655
        tempaddress = _tempaddress(self.baseaddress)
28342
bd05d38a1002 chgserver: use basename for socket symlink
Jun Wu <quark@fb.com>
parents: 28328
diff changeset
   656
        os.symlink(os.path.basename(self.address), tempaddress)
28326
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   657
        util.rename(tempaddress, self.baseaddress)
ea400a4f32e6 chgserver: mangle server address to include confighash
Jun Wu <quark@fb.com>
parents: 28325
diff changeset
   658
28223
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   659
    def run(self):
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   660
        try:
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   661
            self.server.serve_forever()
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   662
        finally:
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   663
            self.server.unlinksocketfile()
0a853dc9b306 chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents: 28159
diff changeset
   664
27792
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   665
def uisetup(ui):
980957333cfa chgserver: import background server extension from cHg
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   666
    commandserver._servicemap['chgunix'] = chgunixservice
28261
2ab59ac06b76 chg: detect chg started by chg
Jun Wu <quark@fb.com>
parents: 28223
diff changeset
   667
2ab59ac06b76 chg: detect chg started by chg
Jun Wu <quark@fb.com>
parents: 28223
diff changeset
   668
    # CHGINTERNALMARK is temporarily set by chg client to detect if chg will
2ab59ac06b76 chg: detect chg started by chg
Jun Wu <quark@fb.com>
parents: 28223
diff changeset
   669
    # start another chg. drop it to avoid possible side effects.
2ab59ac06b76 chg: detect chg started by chg
Jun Wu <quark@fb.com>
parents: 28223
diff changeset
   670
    if 'CHGINTERNALMARK' in os.environ:
2ab59ac06b76 chg: detect chg started by chg
Jun Wu <quark@fb.com>
parents: 28223
diff changeset
   671
        del os.environ['CHGINTERNALMARK']