Tools/Scripts/webkitpy/common/host.py

# Copyright (c) 2010 Google Inc. All rights reserved.
# Copyright (c) 2009 Apple Inc. All rights reserved.
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import logging
import os
import sys

from webkitpy.common.checkout import Checkout
from webkitpy.common.checkout.scm.detection import SCMDetector
from webkitpy.common.memoized import memoized
from webkitpy.common.net import bugzilla, buildbot, web
from webkitpy.common.system.systemhost import SystemHost
from webkitpy.common.watchlist.watchlistparser import WatchListParser
from webkitpy.port.factory import PortFactory


_log = logging.getLogger(__name__)


class Host(SystemHost):
    def __init__(self):
        SystemHost.__init__(self)
        self.web = web.Web()

        self._checkout = None

        # Everything below this line is WebKit-specific and belongs on a higher-level object.
        self.bugs = bugzilla.Bugzilla()
        self.buildbot = buildbot.BuildBot()

        # FIXME: Unfortunately Port objects are currently the central-dispatch objects of the NRWT world.
        # In order to instantiate a port correctly, we have to pass it at least an executive, user, scm, and filesystem
        # so for now we just pass along the whole Host object.
        # FIXME: PortFactory doesn't belong on this Host object if Port is going to have a Host (circular dependency).
        self.port_factory = PortFactory(self)

        self._engage_awesome_locale_hacks()

    # We call this from the Host constructor, as it's one of the
    # earliest calls made for all webkitpy-based programs.
    def _engage_awesome_locale_hacks(self):
        # To make life easier on our non-english users, we override
        # the locale environment variables inside webkitpy.
        # If we don't do this, programs like SVN will output localized
        # messages and svn.py will fail to parse them.
        # FIXME: We should do these overrides *only* for the subprocesses we know need them!
        # This hack only works in unix environments.
        os.environ['LANGUAGE'] = 'en'
        os.environ['LANG'] = 'en_US.UTF-8'
        os.environ['LC_MESSAGES'] = 'en_US.UTF-8'
        os.environ['LC_ALL'] = ''

    def initialize_scm(self, patch_directories=None):
        detector = SCMDetector(self.filesystem, self.executive)
        self._checkout = Checkout(detector.default_scm(patch_directories))

    def scm(self):
        return self._checkout._scm

    def checkout(self):
        return self._checkout

    @memoized
    def watch_list(self):
        config_path = self.filesystem.dirname(self.filesystem.path_to_module('webkitpy.common.config'))
        watch_list_full_path = self.filesystem.join(config_path, 'watchlist')
        if not self.filesystem.exists(watch_list_full_path):
            raise Exception('Watch list file (%s) not found.' % watch_list_full_path)

        watch_list_contents = self.filesystem.read_text_file(watch_list_full_path)
        return WatchListParser().parse(watch_list_contents)