| #!/usr/bin/python |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You 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. |
| # |
| |
| """convert environment variables to config""" |
| |
| import os |
| import re |
| |
| import argparse |
| |
| import sys |
| import transformation |
| |
| class Simple(object): |
| """Simple conversion""" |
| def __init__(self, args): |
| parser = argparse.ArgumentParser() |
| parser.add_argument("--destination", help="Destination directory", required=True) |
| self.args = parser.parse_args(args=args) |
| # copy the default files to file.raw in destination directory |
| |
| self.known_formats = ['xml', 'properties', 'yaml', 'yml', 'env', "sh", "cfg", 'conf'] |
| self.output_dir = self.args.destination |
| |
| self.configurables = {} |
| |
| def destination_file_path(self, name, extension): |
| """destination file path""" |
| return os.path.join(self.output_dir, "{}.{}".format(name, extension)) |
| |
| def write_env_var(self, name, extension, key, value): |
| """Write environment variables""" |
| with open(self.destination_file_path(name, extension) + ".raw", "a") as myfile: |
| myfile.write("{}: {}\n".format(key, value)) |
| |
| def process_envs(self): |
| """Process environment variables""" |
| for key in os.environ.keys(): |
| pattern = re.compile("[_\\.]") |
| parts = pattern.split(key) |
| extension = None |
| name = parts[0].lower() |
| if len(parts) > 1: |
| extension = parts[1].lower() |
| config_key = key[len(name) + len(extension) + 2:].strip() |
| if extension and "!" in extension: |
| splitted = extension.split("!") |
| extension = splitted[0] |
| fmt = splitted[1] |
| config_key = key[len(name) + len(extension) + len(fmt) + 3:].strip() |
| else: |
| fmt = extension |
| |
| if extension and extension in self.known_formats: |
| if name not in self.configurables.keys(): |
| with open(self.destination_file_path(name, extension) + ".raw", "w") as myfile: |
| myfile.write("") |
| self.configurables[name] = (extension, fmt) |
| self.write_env_var(name, extension, config_key, os.environ[key]) |
| else: |
| for configurable_name in self.configurables: |
| if key.lower().startswith(configurable_name.lower()): |
| self.write_env_var(configurable_name, |
| self.configurables[configurable_name], |
| key[len(configurable_name) + 1:], |
| os.environ[key]) |
| |
| def transform(self): |
| """transform""" |
| for configurable_name in self.configurables: |
| name = configurable_name |
| extension, fmt = self.configurables[name] |
| |
| destination_path = self.destination_file_path(name, extension) |
| |
| with open(destination_path + ".raw", "r") as myfile: |
| content = myfile.read() |
| transformer_func = getattr(transformation, "to_" + fmt) |
| content = transformer_func(content) |
| with open(destination_path, "w") as myfile: |
| myfile.write(content) |
| |
| def main(self): |
| """main""" |
| |
| # add the |
| self.process_envs() |
| |
| # copy file.ext.raw to file.ext in the destination directory, and |
| # transform to the right format (eg. key: value ===> XML) |
| self.transform() |
| |
| |
| def main(): |
| """main""" |
| Simple(sys.argv[1:]).main() |
| |
| |
| if __name__ == '__main__': |
| Simple(sys.argv[1:]).main() |