Add ListFiles a function to recursively list files in a directory.

chromite/lib/cros_build_lib.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Common python commands used by various build scripts."""
 
+import os
 import subprocess
 import sys
 
 _STDOUT_IS_TTY = hasattr(sys.stdout, 'isatty') and sys.stdout.isatty()
 
 def RunCommand(cmd, print_cmd=True, error_ok=False, error_message=None,
                exit_code=False, redirect_stdout=False, redirect_stderr=False,
                cwd=None, input=None, enter_chroot=False):
   """Runs a shell command.
 
@@ skipping 101 matching lines @@
 
 
 def Info(message):
   """Emits a blue informational message and continues execution.
 
   Keyword arguments:
     message: The message to be emitted.
   """
   print >> sys.stderr, (
       Color(_STDOUT_IS_TTY).Color(Color.BLUE, '\nINFO: ' + message))
+
+
+def ListFiles(base_dir):
+  """Recurively list files in a directory.
+
+  Keyword arguments:
+    base_dir: directory to start recursively listing in.
+
+  Returns:
+    A list of files relative to the base_dir path or
+    An empty list of there are no files in the directories.
+  """
+  directories = [base_dir]
+  files_list = []
+  while directories:
+    directory = directories.pop()
+    for name in os.listdir(directory):
+      fullpath = os.path.join(directory, name)
+      if os.path.isfile(fullpath):
+        files_list.append(fullpath)
+      elif os.path.isdir(fullpath):
+        directories.append(fullpath)
+
+  return files_list