#!/usr/bin/python
# Copyright 2016 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import json
import os
import sys

# HACK: Import a vendored gae_ext_runtime library until we have a better
# solution.
sys.path.append(os.path.join(
    os.path.dirname(os.path.dirname(os.path.abspath(sys.argv[0]))), 'lib'))

from gae_ext_runtime import comm

def main(args):
    config = comm.get_config()
    params = config.params
    if not params.custom and not params.deploy:
        return 0

    entrypoint = config.runtime_data.entrypoint
    ruby_version = config.runtime_data.ruby_version
    base_image_tag = os.environ.get('GAE_RUBY_BASE_IMAGE_TAG') or 'latest'

    # Locate template directory.
    template_dir = os.path.join(os.path.dirname(__file__), '..', 'templates')

    # Generate Dockerfile
    path = os.path.join(template_dir, 'Dockerfile.template')
    with open(path, 'r') as f:
        data = f.read()

        comm.gen_file('Dockerfile', data.format(ruby_version=ruby_version,
            entrypoint=entrypoint, base_image_tag=base_image_tag))

    # Generate .dockerignore
    path = os.path.join(template_dir, 'dockerignore.template')
    with open(path, 'r') as f:
        comm.gen_file('.dockerignore', f.read())

    return 0

if __name__ == '__main__':
    sys.exit(main(sys.argv))