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py3: define and use pycompat.iteritems() for hgext/...
py3: define and use pycompat.iteritems() for hgext/ .iteritems() -> .items() is the last source transform being performed. But it is also the most widely used. This commit adds a pycompat.iteritems symbol and imports it in place of .iteritems() for usage in hgext/. I chose to stop at just hgext/ because the patch will be large and it is an easy boundary to stop at since we can disable source transformation on a per-package basis. There are places where the type does implement items() and we could call items() directly. However, this would require critical thought and I thought it would be easier to just blindly change the code. We know which call sites need to be audited in the future because they have "pycompat.iteritems." With this change, we no longer perform source transformation on hgext! Differential Revision: https://phab.mercurial-scm.org/D7014

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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, b'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