text: # Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions
  # are met:
  # 1.  Redistributions of source code must retain the above copyright
  #     notice, this list of conditions and the following disclaimer.
  # 2.  Redistributions in binary form must reproduce the above copyright
  #     notice, this list of conditions and the following disclaimer in the
  #     documentation and/or other materials provided with the distribution.
  # 
  # THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  # DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  # ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  """References to non-style modules used by the style package."""
  
  # This module is a simple facade to the functionality used by the
  # style package that comes from WebKit modules outside the style
  # package.
  #
  # With this module, the only intra-package references (i.e.
  # references to webkitpy modules outside the style folder) that
  # the style package needs to make are relative references to
  # this module. For example--
  #
  # > from .. style_references import parse_patch
  #
  # Similarly, people maintaining non-style code are not beholden
  # to the contents of the style package when refactoring or
  # otherwise changing non-style code. They only have to be aware
  # of this module.
  
  import os
  
  from webkitpy.common.checkout.diff_parser import DiffParser
  from webkitpy.common.system.logtesting import LogTesting
  from webkitpy.common.system.logtesting import TestLogStream
  from webkitpy.common.system.logutils import configure_logging
  from webkitpy.common.checkout.scm import detect_scm_system
  from webkitpy.thirdparty.autoinstalled import pep8
  
  
  def detect_checkout():
      """Return a WebKitCheckout instance, or None if it cannot be found."""
      cwd = os.path.abspath(os.curdir)
      scm = detect_scm_system(cwd)
  
      return None if scm is None else WebKitCheckout(scm)
  
  
  def parse_patch(patch_string):
  
      """Parse a patch string and return the affected files."""
  
      patch = DiffParser(patch_string.splitlines())
      return patch.files
  
  
  class WebKitCheckout(object):
  
      """Simple facade to the SCM class for use by style package."""
  
      def __init__(self, scm):
          self._scm = scm
  
      def root_path(self):
          """Return the checkout root as an absolute path."""
          return self._scm.checkout_root
  
      def create_patch(self, git_commit, squash):
          return self._scm.create_patch(git_commit, squash)
  
  