takserver/scripts/coreConfigEnvHelper.py

106 lines
3.4 KiB
Python

#!/usr/bin/env python3
import argparse
import os
from lxml import etree
parser = argparse.ArgumentParser('CoreConfig Configuration Helper')
parser.add_argument('source', metavar='SOURCE', type=str, help='The source CoreConfig path')
parser.add_argument('target', metavar='TARGET', type=str, help='The target CoreConfig path')
CORE_CONFIG_NAMESPACE = 'http://bbn.com/marti/xml/config'
class ConfigEntry:
def __init__(self, env_var, xpath, attribute_name, required, hide_value):
self._env_var = env_var # type: str
self._xpath = xpath # type: str
self._attribute_name = attribute_name # type: str
self._required = required # type: bool
self._hide_value = hide_value # type: bool
@property
def attribute_name(self):
return self._attribute_name
@property
def xpath(self):
return self._xpath
@property
def env_var(self):
return self._env_var
@property
def required(self):
return self._required
@property
def hide_value(self):
return self._hide_value
def value(self):
if self._env_var in os.environ.keys():
return os.environ[self._env_var]
else:
return None
CONFIG_VALUES = [
ConfigEntry('POSTGRES_URL', 'tak:repository/tak:connection', 'url', False, False),
ConfigEntry('POSTGRES_USER', 'tak:repository/tak:connection', 'username', False, False),
ConfigEntry('POSTGRES_PASSWORD', 'tak:repository/tak:connection', 'password', True, True),
ConfigEntry('TAKSERVER_CERT_PASS', 'tak:security/tak:tls', 'keystorePass', True, True),
ConfigEntry('CA_PASS', 'tak:security/tak:tls', 'truststorePass', True, True)
]
class CoreConfigHelper:
def __init__(self, source_filepath):
self._source_filepath = source_filepath
self._tree = etree.parse(open(source_filepath), etree.XMLParser())
self._root = self._tree.getroot()
self._namespaces = {
'tak': CORE_CONFIG_NAMESPACE
}
def find(self, xpath):
"""
:rtype: etree.Element
"""
results = self._tree.findall(path=xpath, namespaces=self._namespaces)
if len(results) > 1:
raise Exception('XPath expressions that return multiple elements are not currently supported!')
return results[0]
def process_configuration(self, config_values, target_filepath):
"""
:type config_values: list[ConfigEntry]
"""
for config in config_values:
value = config.value()
if value is None:
if config.required:
raise Exception('The environment variable "' + config.env_var + '" is required!')
else:
element = self.find(config.xpath)
element.set(config.attribute_name, value)
if config.hide_value:
print(config.xpath.replace('tak:', '') + ' attribute ' + config.attribute_name + ' set to ********')
else:
print(config.xpath.replace('tak:', '') + ' attribute ' + config.attribute_name + ' set to "' + value + '"')
self._tree.write(target_filepath, xml_declaration=True, encoding='UTF-8')
def main():
args = parser.parse_args()
helper = CoreConfigHelper(args.source)
helper.process_configuration(CONFIG_VALUES, args.target)
if __name__ == '__main__':
main()