flutter_flutter/sky/tools/webkitpy/common/host.py

# Copyright (c) 2010 Google Inc. All rights reserved.
# Copyright (c) 2009 Apple Inc. All rights reserved.
#
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# modification, are permitted provided that the following conditions are
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import logging
import os
import sys

from webkitpy.common.checkout.scm.detection import SCMDetector
from webkitpy.common.memoized import memoized
from webkitpy.common.net import buildbot, web
from webkitpy.common.net.buildbot.chromiumbuildbot import ChromiumBuildBot
from webkitpy.common.system.systemhost import SystemHost
from webkitpy.layout_tests.port.factory import PortFactory


_log = logging.getLogger(__name__)


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

        self._scm = None

        # Everything below this line is WebKit-specific and belongs on a higher-level object.
        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'] = ''

    # FIXME: This is a horrible, horrible hack for WinPort and should be removed.
    # Maybe this belongs in SVN in some more generic "find the svn binary" codepath?
    # Or possibly Executive should have a way to emulate shell path-lookups?
    # FIXME: Unclear how to test this, since it currently mutates global state on SVN.
    def _engage_awesome_windows_hacks(self):
        try:
            self.executive.run_command(['svn', 'help'])
        except OSError, e:
            try:
                self.executive.run_command(['svn.bat', 'help'])
                # The Win port uses the depot_tools package, which contains a number
                # of development tools, including Python and svn. Instead of using a
                # real svn executable, depot_tools indirects via a batch file, called
                # svn.bat. This batch file allows depot_tools to auto-update the real
                # svn executable, which is contained in a subdirectory.
                #
                # That's all fine and good, except that subprocess.popen can detect
                # the difference between a real svn executable and batch file when we
                # don't provide use shell=True. Rather than use shell=True on Windows,
                # We hack the svn.bat name into the SVN class.
                _log.debug('Engaging svn.bat Windows hack.')
                from webkitpy.common.checkout.scm.svn import SVN
                SVN.executable_name = 'svn.bat'
            except OSError, e:
                _log.debug('Failed to engage svn.bat Windows hack.')
        try:
            self.executive.run_command(['git', 'help'])
        except OSError, e:
            try:
                self.executive.run_command(['git.bat', 'help'])
                # The Win port uses the depot_tools package, which contains a number
                # of development tools, including Python and git. Instead of using a
                # real git executable, depot_tools indirects via a batch file, called
                # git.bat. This batch file allows depot_tools to auto-update the real
                # git executable, which is contained in a subdirectory.
                #
                # That's all fine and good, except that subprocess.popen can detect
                # the difference between a real git executable and batch file when we
                # don't provide use shell=True. Rather than use shell=True on Windows,
                # We hack the git.bat name into the SVN class.
                _log.debug('Engaging git.bat Windows hack.')
                from webkitpy.common.checkout.scm.git import Git
                Git.executable_name = 'git.bat'
            except OSError, e:
                _log.debug('Failed to engage git.bat Windows hack.')

    def initialize_scm(self, patch_directories=None):
        if sys.platform == "win32":
            self._engage_awesome_windows_hacks()
        detector = SCMDetector(self.filesystem, self.executive)
        self._scm = detector.default_scm(patch_directories)

    def scm(self):
        return self._scm

    def scm_for_path(self, path):
        # FIXME: make scm() be a wrapper around this, and clean up the way
        # callers call initialize_scm() (to remove patch_directories) and scm().
        if sys.platform == "win32":
            self._engage_awesome_windows_hacks()
        return SCMDetector(self.filesystem, self.executive).detect_scm_system(path)

    def buildbot_for_builder_name(self, name):
        if self.port_factory.get_from_builder_name(name).is_chromium():
            return self.chromium_buildbot()
        return self.buildbot

    @memoized
    def chromium_buildbot(self):
        return ChromiumBuildBot()