Revert of 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)