text: # Copyright 2019 The Chromium Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  
  """Enforces Vulkan function pointer autogen matches script output.
  
  See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
  for more details on the presubmit API built into depot_tools.
  """
  
  import os.path
  
  
  USE_PYTHON3 = True
  
  
  def CommonChecks(input_api, output_api):
    generating_files = input_api.AffectedFiles(
        file_filter=lambda x: os.path.basename(x.LocalPath()) in [
            'generate_bindings.py'])
    generated_files = input_api.AffectedFiles(
        file_filter=lambda x: os.path.basename(x.LocalPath()) in [
            'vulkan_function_pointers.cc', 'vulkan_function_pointers.h'])
  
  
    messages = []
  
    if generated_files and not generating_files:
      long_text = 'Changed files:\n'
      for generated_file in generated_files:
        long_text += generated_file.LocalPath() + '\n'
        long_text += '\n'
        messages.append(output_api.PresubmitError(
            'Vulkan function pointer generated files changed but the generator '
            'did not.', long_text=long_text))
  
    with input_api.temporary_directory() as temp_dir:
      commands = []
      if generating_files:
        python_executable = input_api.python3_executable
        commands.append(input_api.Command(name='generate_bindings',
                                          cmd=[python_executable,
                                               'generate_bindings.py',
                                               '--check',
                                               '--output-dir=' + temp_dir],
                                          kwargs={},
                                          message=output_api.PresubmitError))
      if commands:
        messages.extend(input_api.RunTests(commands))
  
    return messages
  
  def CheckChangeOnUpload(input_api, output_api):
    return CommonChecks(input_api, output_api)
  
  def CheckChangeOnCommit(input_api, output_api):
    return CommonChecks(input_api, output_api)
  