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−#! /usr/bin/python2.5
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−
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−# Copyright 2009 the Melange authors.
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−#
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−# Licensed under the Apache License, Version 2.0 (the "License");
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−# you may not use this file except in compliance with the License.
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−# You may obtain a copy of the License at
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−#
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−#   http://www.apache.org/licenses/LICENSE-2.0
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−#
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−# Unless required by applicable law or agreed to in writing, software
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−# distributed under the License is distributed on an "AS IS" BASIS,
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−# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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−# See the License for the specific language governing permissions and
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−# limitations under the License.
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−
+
−"""A script to generate the app.yaml from the template with an application
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−name filled in.
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−
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−Usage:
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−  gen_app_yaml.py [-f] APPLICATION_NAME
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−
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−Arguments:
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−  APPLICATION_NAME: the name to use for the application (no underscores)
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−
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−Flags:
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−  -f:  overwrite an existing app.yaml (default=false)
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−"""
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−
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−from __future__ import with_statement
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−
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−__authors__ = [
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−    # alphabetical order by last name, please
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−    '"Dan Bentley" <dbentley@google.com>',
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−    ]
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−
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−
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−import os
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−import sys
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−
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−
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−def generateAppYaml(application_name, force=False):
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−  """Generate the app.yaml file.
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−
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−  Args:
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−    application_name: str, the name to write into the application filed
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−    force: bool, whether to overwrite an existing app.yaml
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−  """
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−
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−  scripts_directory = os.path.dirname(__file__)
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−  app_dir = os.path.abspath(os.path.join(scripts_directory, '../app'))
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−  template_path = os.path.join(app_dir, 'app.yaml.template')
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−  app_yaml_path = os.path.join(app_dir, 'app.yaml')
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−
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−  if not os.path.exists(template_path):
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−    sys.exit("Template file %s non-existent. Corrupt client?" % template_path)
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−
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−  if os.path.exists(app_yaml_path):
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−    if not force:
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−      sys.exit("%s exists; exiting. To overwrite, pass -f on the command-line"
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−               % app_yaml_path)
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−
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−  with open(template_path) as infile:
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−    template_contents = infile.read()
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−
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−  app_yaml_contents = template_contents.replace(
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−      '# application: FIXME',
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−      'application: '+ application_name)
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−
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−  with open(app_yaml_path, 'w') as outfile:
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−    outfile.write(app_yaml_contents)
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−
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−  print "Wrote application name %s to %s." % (application_name, app_yaml_path)
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−
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−
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−def usage(msg):
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−  """Print an error message and the usage of the program; then quit.
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−  """
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−
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−  sys.exit('Error: %s\n\n%s' % (msg, __doc__))
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−
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−
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−def main(args):
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−  """Main program.
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−  """
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−
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−  if not args:
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−    usage("No arguments supplied.")
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−
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−  if args[0] == '-f':
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−    force = True
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−    args = args[1:]
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−  else:
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−    force = False
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−
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−  if len(args) != 1:
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−    usage("No application name supplied.")
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−
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−  application_name = args[0]
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−  generateAppYaml(application_name, force=force)
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−
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−
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−if __name__ == '__main__':
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−  main(sys.argv[1:]) # strip off the binary name