Allow tests to specify a package root.

dart/tools/make_links.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.
+
+
+'''Tool for creating symlinks from SOURCES to TARGET.
+
+For each SOURCE in SOURCES create a link from SOURCE to TARGET.  If a
+SOURCE ends with .../lib, the lib suffix is ignored when determining
+the name of the target link.
+
+Usage:
+  python tools/make_links.py TARGET SOURCES...
+'''
+
+import os
+import subprocess
+import sys
+import utils
+
+
+def make_link(source, target):
+  if utils.GuessOS() == 'win32':
+    return subprocess.call(['mklink', '/j', target, source])
+  else:
+    return subprocess.call(['ln', '-s', source, target])
+
+
+def main(argv):
+  target = argv[1]
+  for source in argv[2:]:
+    # Assume the source directory is named ".../TARGET_NAME/lib".
+    (name, lib) = os.path.split(source)
+    if lib != 'lib':
+      name = source
+    # Remove any addtional path components preceding TARGET_NAME.
+    (path, name) = os.path.split(name)
+    exit_code = make_link(os.path.relpath(source, start=target),
+                          os.path.join(target, name))
+    if exit_code != 0:
+      return exit_code
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))