Implemented quick builds (e.g. only do full clean if the previous build failed).

BUG=
TEST=

Review URL: https://webrtc-codereview.appspot.com/400009

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1752 4adac7df-926f-26a2-2b94-8c16560cd09d

tools/continuous_build/clean_old_files.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python
+#  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+#
+#  Use of this source code is governed by a BSD-style license
+#  that can be found in the LICENSE file in the root of the source
+#  tree. An additional intellectual property rights grant can be found
+#  in the file PATENTS.  All contributing project authors may
+#  be found in the AUTHORS file in the root of the source tree.
+
+__author__ = "ivinnichenko@webrtc.org (Illya Vinnichenko)"
+
+from optparse import OptionParser
+import os
+import sys
+import time
+
+# The path is considered whitelisted if any of these entries appear
+# at some point in the path
+WHITELIST = ["buildbot.tac", "master.cfg", "public_html", "changes.pck",
+             "webrtc_buildbot"]
+
+
+def is_whitelisted(path):
+  """Check if file is whitelisted.
+
+    path: file path.
+  """
+  for entry in WHITELIST:
+    if entry in path:
+      return True
+  return False
+
+
+def remove_old_filenames(path, num_days, verbose):
+  """Remove old files.
+
+    path: base directory for removal.
+    num_days: days limit for removal.
+    verbose: print every cmd?
+  """
+  print "Cleaning up everything in %s older than %s days" % (path, num_days)
+  current_time = time.time()
+  limit = 60*60*24*num_days
+  for root, unused_dirs, files in os.walk(path):
+    for filename in files:
+      current_file = os.path.join(root, filename)
+      if is_whitelisted(current_file):
+        continue
+      time_stamp = os.stat(current_file).st_mtime
+      if (current_time - time_stamp) > limit:
+        str_stamp = time.strftime("%a, %d %b %Y %H:%M:%S +0000",
+                    time.gmtime(time_stamp))
+        if verbose:
+          print "Removing [%s], stamped on %s" % (current_file, str_stamp)
+        os.remove(current_file)
+
+
+def main():
+  usage = "usage: %prog [options] arg"
+  parser = OptionParser(usage)
+  parser.add_option("-p", "--path", dest="cleanup_path", help="base directory")
+  parser.add_option("-n", "--num_days", dest="num_days", help="number of days")
+  parser.add_option("-q", "--quiet",
+                    action="store_false", dest="verbose", default=True,
+                    help="don't print status messages to stdout")
+
+  options, args = parser.parse_args()
+  if not options.cleanup_path:
+    print "You must specify base directory"
+    sys.exit(2)
+  if not options.num_days:
+    print "You must specify number of days old"
+    sys.exit(2)
+  remove_old_filenames(options.cleanup_path, int(options.num_days),
+                       options.verbose)
+
+if __name__ == "__main__":
+  main()