Cross-repo recipe package system.

scripts/slave/recipe_modules/python/api.py

-# Copyright 2013 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.
-
-from recipe_engine import recipe_api
-
-import textwrap
-
-class PythonApi(recipe_api.RecipeApi):
-  def __call__(self, name, script, args=None, unbuffered=True, **kwargs):
-    """Return a step to run a python script with arguments."""
-    cmd = ['python']
-    if unbuffered:
-      cmd.append('-u')
-    cmd.append(script)
-    return self.m.step(name, cmd + list(args or []), **kwargs)
-
-  def inline(self, name, program, add_python_log=True, **kwargs):
-    """Run an inline python program as a step.
-
-    Program is output to a temp file and run when this step executes.
-    """
-    program = textwrap.dedent(program)
-    compile(program, '<string>', 'exec', dont_inherit=1)
-
-    try:
-      self(name, self.m.raw_io.input(program, '.py'), **kwargs)
-    finally:
-      result = self.m.step.active_result
-      if result and add_python_log:
-        result.presentation.logs['python.inline'] = program.splitlines()
-
-    return result
-
-  def result_step(self, name, text, retcode, as_log=None):
-    """Return a no-op step that exits with a specified return code."""
-    try:
-      self.inline(name,
-                  'import sys; sys.exit(%d)' % (retcode,),
-                  add_python_log=False,
-                  step_test_data=lambda: self.m.raw_io.test_api.output(
-                      text, retcode=retcode))
-    finally:
-      if as_log:
-        self.m.step.active_result.presentation.logs[as_log] = text
-      else:
-        self.m.step.active_result.presentation.step_text = text
-
-  def succeeding_step(self, name, text, as_log=None):
-    """Return a succeeding step (correctly recognized in expectations)."""
-    return self.result_step(name, text, 0, as_log=as_log)
-
-  def failing_step(self, name, text, as_log=None):
-    """Return a failing step (correctly recognized in expectations)."""
-    return self.result_step(name, text, 1, as_log=as_log)