Split the URI library across multiple files.

dart/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:
+                    if line.startswith('#source'):
+                        line = '// %s' % line
+                    output.write(line)
+    shutil.move(tmp_name, options.output)
+
+if __name__ == '__main__':
+    main()