1 files changed, 58 insertions, 0 deletions
diff --git a/chromium/infra/scripts/build_directory.py b/chromium/infra/scripts/build_directory.py
new file mode 100644
index 00000000000..23847be2f5c
--- /dev/null
+++ b/chromium/infra/scripts/build_directory.py
@@ -0,0 +1,58 @@
+# Copyright (c) 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.
+
+"""Functions for discovering and clearing the build directory."""
+
+import os
+import sys
+
+
+def IsFileNewerThanFile(file_a, file_b):
+  """Returns True if file_a's mtime is newer than file_b's."""
+  def getmtime(f):
+    try:
+      return os.path.getmtime(f)
+    except os.error:
+      return 0
+  return getmtime(file_a) >= getmtime(file_b)
+
+
+def AreNinjaFilesNewerThanXcodeFiles(src_dir=None):
+  """Returns True if the generated ninja files are newer than the generated
+  xcode files.
+
+  Parameters:
+    src_dir: The path to the src directory.  If None, it's assumed to be
+             at src/ relative to the current working directory.
+  """
+  src_dir = src_dir or 'src'
+  ninja_path = os.path.join(src_dir, 'out', 'Release', 'build.ninja')
+  xcode_path = os.path.join(
+      src_dir, 'build', 'all.xcodeproj', 'project.pbxproj')
+  return IsFileNewerThanFile(ninja_path, xcode_path)
+
+
+def GetBuildOutputDirectory(src_dir=None, cros_board=None):
+  """Returns the path to the build directory, relative to the checkout root.
+
+  Assumes that the current working directory is the checkout root.
+  """
+  # src_dir is only needed for compiling v8, which uses compile.py (but no other
+  # of the build scripts), but its source root isn't "src" -- crbug.com/315004
+  if src_dir is None:
+    src_dir = 'src'
+
+  if sys.platform.startswith('linux'):
+    out_dirname = 'out'
+    if cros_board:
+      # Simple chrome workflow output (e.g., "out_x86-generic")
+      out_dirname += '_%s' % (cros_board,)
+    return os.path.join(src_dir, out_dirname)
+  assert not cros_board, "'cros_board' not supported on this platform"
+
+  if sys.platform == 'cygwin' or sys.platform.startswith('win') or (
+      sys.platorm == 'darwin'):
+    return os.path.join(src_dir, 'out')
+
+  raise NotImplementedError('Unexpected platform %s' % sys.platform)