adding configcli

python/configcli.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+"""
+Leverage the python ConfigParser() class for use as a commandline INI
+file reader, can be used from bash to leverage all the safety in place.
+
+See: https://docs.python.org/2/library/configparser.html
+
+SPDX-License-Identifier: MIT
+"""
+
+import argparse
+import configparser
+import signal
+
+__version__ = "0.0.1"
+
+
+def read_ini(cfgfile, section, key):
+    # because we're simply printing to stdout, it really doesn't
+    # matter if the file is missing, the section, the key or the
+    # value - just try and get whatever is in there and print it
+    # out in a very bash-esque way. Just avoid all exceptions.
+    try:
+        config = configparser.ConfigParser()
+        config.read(cfgfile)
+        if config.has_option(section, key):
+            return config.get(section, key)
+    except:
+        pass
+
+    # any error is just an empty string return
+    return ""
+
+
+def parse_args():
+    """Argument parsing routine"""
+    parser = argparse.ArgumentParser(description="ConfigCli")
+    parser.add_argument(
+        "--version", action="version", version=__version__, help="Display the version"
+    )
+    parser.add_argument(
+        "-f", "--file", required=True, dest="cfgfile", help="Config file to read"
+    )
+    parser.add_argument(
+        "-s", "--section", required=True, dest="section", help="Section to read"
+    )
+    parser.add_argument("-k", "--key", required=True, dest="key", help="Key to read")
+    return parser.parse_args()
+
+
+def sigbye_handler(signal, frame):
+    """Exit function triggered by caught signals"""
+    sys.exit(0)
+
+
+if __name__ == "__main__":
+    """Main entry point for ConfigCli"""
+    # register a clean shutdown for the usual signals
+    signal.signal(signal.SIGINT, sigbye_handler)
+    signal.signal(signal.SIGQUIT, sigbye_handler)
+    signal.signal(signal.SIGTERM, sigbye_handler)
+
+    args = parse_args()
+    print(read_ini(args.cfgfile, args.section, args.key))