move tip to utils so it can be picked up in the SDK

frog/tip/copy_libs.py

-#!/usr/local/evn python
-# Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-
-# TODO(jimhug): THIS IS CURRENTLY BROKEN - NEEDS FIX BEFORE EXTENSIONS WORK!
-
-# A script that copies dart/frog/lib under dart/frog/tip/lib/. This script
-# internally uses copy_dart to resolve relative paths used in the libraries and
-# merge source files together.
-
-# Note: The current setup assumes that all libraries used by frog (except some
-# sources) are within the frog/lib. If frog/lib contains a #import outside that
-# directory, we need to update this script to contain a deeper hierarchy of
-# directories.
-
-import os
-import fileinput
-import re
-import subprocess
-import sys
-
-TIP_PATH = os.path.dirname(os.path.abspath(__file__))
-FROG_PATH = os.path.dirname(TIP_PATH)
-LIB_PATH = os.path.join(FROG_PATH, 'lib')
-
-re_library = re.compile(r'^#library\([\'"]([^\'"]*)[\'"]\);$')
-
-def find_libraries(path):
-  """ finds .dart files containing the #library directive. """
-  libs = []
-  for root, dirs, files in os.walk(path):
-    for fname in files:
-      if fname.endswith('.dart') and not root.endswith('lib/node'):
-        relpath = os.path.relpath(os.path.join(root, fname))
-        for line in fileinput.input(relpath):
-          if re_library.match(line):
-            libs.append(relpath)
-            break
-        fileinput.close()
-  return libs
-
-def main():
-  os.chdir(LIB_PATH)
-  libs = find_libraries(LIB_PATH)
-  return subprocess.call([sys.executable,
-      '../../client/tools/copy_dart.py', os.path.join(TIP_PATH, 'lib')] + libs)
-
-if __name__ == '__main__':
-  sys.exit(main())