display line count in legpad

tools/testing/legpad/legpad.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.
 
 """
 Legpad is used to compile .dart files to javascript, using the dart2js compiler.
 
 This is accomplished by creating an html file (usually called
@@ skipping 268 matching lines @@
     hold the contents of this file.
     """
     return self.shorten(name).replace("/", "_").replace(".", "_")
 
 
 class File(object):
   def __init__(self, pad, name):
     self.pad = pad
     self.name = name
     self.id = pad.make_id(name)
-    check_exists(name)
-    with open(self.name, "r") as f:
-      self.contents = f.read()
+    self.contents = read_file(name)
 
   def directives(self):
     """Load files referenced by #source, #import and #native directives."""
     lines = self.contents.split("\n")
     self.line_number = 0
     for line in lines:
       self.line_number += 1
       self._directive(line)
 
   def _directive(self, line):
@@ skipping 57 matching lines @@
     raise CommandFailedException(msg)
   logging.debug("SUCCEEDED (%d bytes)" % len(stdout))
   return stdout
 
 
 def main(argv):
   Pad(argv)
 
 if __name__ == "__main__":
   sys.exit(main(sys.argv))