Final step towards loading core library scripts directly from the sources

runtime/tools/concat_library.py

-#!/usr/bin/env python
-# Copyright (c) 2012, 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.
-
-import optparse
-import shutil
-import sys
-
-def parse_options(argv):
-    parser = optparse.OptionParser(usage="Usage: %prog [options] files")
-    parser.add_option("--output",
-                      dest="output",
-                      help="Write output to FILE.",
-                      metavar="FILE")
-    (options, arguments) = parser.parse_args(argv[1:])
-    if not arguments:
-        parser.error("At least one input file must be provided.")
-    if not options.output:
-        parser.error("No --output provided.")
-    return (options, arguments)
-
-
-def main():
-    # Print the command that is being run. This is helpful when
-    # debugging build errors.
-    sys.stderr.write('%s\n' % ' '.join(sys.argv))
-    (options, arguments) = parse_options(sys.argv)
-    tmp_name = '%s.tmp' % options.output
-    with open(tmp_name, 'w') as output:
-        for source in arguments:
-            with open(source, 'r') as inpt:
-                for line in inpt:
-                    # Drop unneeded library tags as all the library's files
-                    # are concatenated into one big file here:
-                    # The 'part' and 'part of' library tags are removed.
-                    if line.startswith('#source') or line.startswith('part '):
-                        line = '// %s' % line
-                    output.write(line)
-    shutil.move(tmp_name, options.output)
-
-if __name__ == '__main__':
-    main()