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#!/usr/bin/python3
import argparse
import sys
import yaml
from pathlib import Path
def parse_arguments():
description = "Synapse config parser"
config_parser = argparse.ArgumentParser(description=description)
config_parser.add_argument(
"-c",
"--config-path",
action="append",
type=Path,
metavar="CONFIG_FILE",
help="Specify config file. Can be given multiple times and"
" may specify directories containing *.yaml files.",
)
config_parser.add_argument(
"--keys-directory",
metavar="DIRECTORY",
type=Path,
help="Where files such as certs and signing keys are stored when"
" their location is not given explicitly in the config."
" Defaults to the directory containing the last config file",
)
config_parser.add_argument(
"config_key",
metavar="KEY",
type=str,
help="Configuration setting to query",
)
return config_parser.parse_args()
def find_config_files(search_paths):
config_files = []
if search_paths:
for config_path in search_paths:
if config_path.is_dir():
# We accept specifying directories as config paths, we search
# inside that directory for all files matching *.yaml, and then
# we apply them in *sorted* order.
config_files.extend(sorted(config_path.glob('*.yaml')))
else:
config_files.append(config_path)
return config_files
def read_config_files(config_files):
specified_config = {}
for config_file in config_files:
with config_file.open() as file_stream:
yaml_config = yaml.safe_load(file_stream)
if not isinstance(yaml_config, dict):
err = "File %r is empty or doesn't parse into a key-value map. IGNORING."
print(err % (config_file,), file=sys.stderr)
continue
specified_config.update(yaml_config)
return specified_config
config_args = parse_arguments()
config_files = find_config_files(search_paths=config_args.config_path)
if not config_files:
print("Must supply a config file.", file=sys.stderr)
sys.exit(1)
if config_args.keys_directory:
config_dir_path = config_args.keys_directory
else:
config_dir_path = config_files[-1].parent
config_dir_path = config_dir_path.resolve()
data_dir_path = Path.cwd()
config_dict = read_config_files(config_files)
print(config_dict[config_args.config_key])
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