old_contents: # Copyright (c) 2017, 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 os
  import subprocess
  import sys
  import utils
  
  usage = """compile_platform.py [options]"""
  
  def DisplayBootstrapWarning():
    print """\
  
  
  WARNING: Your system can't run the checked-in Dart SDK.  Using the bootstrap
  Dart executable will make debug builds slow.  Please see the Wiki for
  instructions on replacing the checked-in Dart SDK.
  
  https://github.com/dart-lang/sdk/wiki/The-checked-in-SDK-in-tools
  
  """
  
  def path(uri_path):
    args = [ os.path.dirname(__file__), ".." ] + uri_path.split("/")
    return os.path.normpath(os.path.join(*args))
  
  def main():
    verbose = False
    arguments = [ None ] # Leave room for the Dart VM executable.
    arguments.append("--packages=" + path(".packages"))
    arguments.append(path("pkg/front_end/tool/_fasta/compile_platform.dart"))
    i = 1 # Skip argument #0 which is the script name.
    dart_executable = None
    while i < len(sys.argv):
      argument = sys.argv[i]
      if argument == "--dart-executable":
        dart_executable = sys.argv[i + 1]
        i += 1
      elif argument.startswith("--dart-executable="):
        dart_executable = argument[len("--dart-executable="):]
      else:
        if argument == "-v" or argument == "--verbose":
          verbose = True
        arguments.append(argument)
      i += 1
  
    if dart_executable:
      dart_executable = os.path.abspath(dart_executable)
    else:
      if utils.CheckedInSdkCheckExecutable():
        dart_executable = utils.CheckedInSdkExecutable()
      else:
        DisplayBootstrapWarning()
        print >> sys.stderr, "ERROR: Can't locate Dart VM executable."
        return -1
  
    arguments[0] = os.path.relpath(dart_executable)
    if verbose:
      print "Running:", " ".join(arguments)
    return subprocess.call(arguments)
  
  if __name__ == "__main__":
    sys.exit(main())
  
new_contents: #!/usr/bin/env python
  # Copyright (c) 2017, 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 os
  import subprocess
  import sys
  import utils
  
  usage = """compile_platform.py [options]"""
  
  def DisplayBootstrapWarning():
    print """\
  
  
  WARNING: Your system can't run the checked-in Dart SDK.  Using the bootstrap
  Dart executable will make debug builds slow.  Please see the Wiki for
  instructions on replacing the checked-in Dart SDK.
  
  https://github.com/dart-lang/sdk/wiki/The-checked-in-SDK-in-tools
  
  """
  
  
  def path(uri_path):
    args = [ os.path.dirname(__file__), ".." ] + uri_path.split("/")
    return os.path.normpath(os.path.join(*args))
  
  
  def main():
    verbose = False
    arguments = [ None ] # Leave room for the Dart VM executable.
    arguments.append("--packages=" + path(".packages"))
    arguments.append(path("pkg/front_end/tool/_fasta/compile_platform.dart"))
    i = 1 # Skip argument #0 which is the script name.
    dart_executable = None
    while i < len(sys.argv):
      argument = sys.argv[i]
      if argument == "--dart-executable":
        dart_executable = sys.argv[i + 1]
        i += 1
      elif argument.startswith("--dart-executable="):
        dart_executable = argument[len("--dart-executable="):]
      else:
        if argument == "-v" or argument == "--verbose":
          verbose = True
        arguments.append(argument)
      i += 1
  
    if dart_executable:
      dart_executable = os.path.abspath(dart_executable)
    else:
      if utils.CheckedInSdkCheckExecutable():
        dart_executable = utils.CheckedInSdkExecutable()
      else:
        DisplayBootstrapWarning()
        print >> sys.stderr, "ERROR: Can't locate Dart VM executable."
        return -1
  
    arguments[0] = os.path.relpath(dart_executable)
    if verbose:
      print "Running:", " ".join(arguments)
    return subprocess.call(arguments)
  
  
  if __name__ == "__main__":
    sys.exit(main())
  
subject: Add shebang to //tools/compile_platform.py