##// END OF EJS Templates
automation: schedule an EC2Launch run on next boot...
automation: schedule an EC2Launch run on next boot Without this, launching EC2 instances constructed from the AMI won't go through the normal EC2 instance launch machinery. This missing machinery does important things like set up network routes to use the instance metadata service and process any UserData. Since EC2Launch now runs on subsequent boots and UserData is processed, we needed to make setting of UserData conditional on bootstrapping mode. Differential Revision: https://phab.mercurial-scm.org/D7113

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watchmanclient.py
118 lines | 3.6 KiB | text/x-python | PythonLexer
# watchmanclient.py - Watchman client for the fsmonitor extension
#
# Copyright 2013-2016 Facebook, Inc.
#
# 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 getpass
from mercurial import util
from . import pywatchman
class Unavailable(Exception):
def __init__(self, msg, warn=True, invalidate=False):
self.msg = msg
self.warn = warn
if self.msg == b'timed out waiting for response':
self.warn = False
self.invalidate = invalidate
def __str__(self):
if self.warn:
return b'warning: Watchman unavailable: %s' % self.msg
else:
return b'Watchman unavailable: %s' % self.msg
class WatchmanNoRoot(Unavailable):
def __init__(self, root, msg):
self.root = root
super(WatchmanNoRoot, self).__init__(msg)
class client(object):
def __init__(self, ui, root, timeout=1.0):
err = None
if not self._user:
err = b"couldn't get user"
warn = True
if self._user in ui.configlist(b'fsmonitor', b'blacklistusers'):
err = b'user %s in blacklist' % self._user
warn = False
if err:
raise Unavailable(err, warn)
self._timeout = timeout
self._watchmanclient = None
self._root = root
self._ui = ui
self._firsttime = True
def settimeout(self, timeout):
self._timeout = timeout
if self._watchmanclient is not None:
self._watchmanclient.setTimeout(timeout)
def getcurrentclock(self):
result = self.command(b'clock')
if not util.safehasattr(result, 'clock'):
raise Unavailable(
b'clock result is missing clock value', invalidate=True
)
return result.clock
def clearconnection(self):
self._watchmanclient = None
def available(self):
return self._watchmanclient is not None or self._firsttime
@util.propertycache
def _user(self):
try:
return getpass.getuser()
except KeyError:
# couldn't figure out our user
return None
def _command(self, *args):
watchmanargs = (args[0], self._root) + args[1:]
try:
if self._watchmanclient is None:
self._firsttime = False
watchman_exe = self._ui.configpath(
b'fsmonitor', b'watchman_exe'
)
self._watchmanclient = pywatchman.client(
timeout=self._timeout,
useImmutableBser=True,
watchman_exe=watchman_exe,
)
return self._watchmanclient.query(*watchmanargs)
except pywatchman.CommandError as ex:
if b'unable to resolve root' in ex.msg:
raise WatchmanNoRoot(self._root, ex.msg)
raise Unavailable(ex.msg)
except pywatchman.WatchmanError as ex:
raise Unavailable(str(ex))
def command(self, *args):
try:
try:
return self._command(*args)
except WatchmanNoRoot:
# this 'watch' command can also raise a WatchmanNoRoot if
# watchman refuses to accept this root
self._command(b'watch')
return self._command(*args)
except Unavailable:
# this is in an outer scope to catch Unavailable form any of the
# above _command calls
self._watchmanclient = None
raise