command line and config file management

TODO

@@ -3,7 +3,6 @@
 - add deb packaging
 - logging
 - message localization
-- put config in /etc, if doesn't exist, load local file
 - user settings (activation time, etc)
 - command extension (/record for recording audio)
 - unpair other usernames
@@ -12,6 +11,7 @@
 
 dependencies:
 - python-watchdog
+- python-argparse
 - python-configparser
 - telepot???
 - datetime forse gia' incluso

telegram-notify.py

@@ -8,6 +8,7 @@ import telepot
 import json
 import sys
 import os
+import argparse
 from telepot.loop import MessageLoop
 from watchdog.observers import Observer
 from watchdog.events import PatternMatchingEventHandler
@@ -151,15 +152,46 @@ def checkFiles():
     for f in l:
         processFile("%s/%s" % (spool_dir,f) )
 
-for arg in sys.argv:
-    if arg=='-v' or arg=='--version':
+
+configFile = '/etc/telegram-notify/telegram-notify.conf'
+if not os.path.isfile(configFile) or not os.access(configFile, os.R_OK):
+    configFile = './telegram-notify.conf'
+    if not os.path.isfile(configFile) or not os.access(configFile, os.R_OK):
+        configFile = ''
+
+
+parser = argparse.ArgumentParser(description='Daemon for Telegram notification management')
+parser.add_argument('-c', '--config', nargs='?',
+                    help='start with specified config file')
+parser.add_argument('-V', '--version', action='store_true',
+                    help='show program version and quit')
+args = parser.parse_args()
+
+if args.version:
     print 'telegram-notify version %s - Copyright (C) 2018 by Paolo Asperti.' % version
     sys.exit(0)
 
+if args.config:
+    if not os.path.isfile(args.config):
+        print 'specified config file doesn\'t exists or is not a file'
+        sys.exit(1)
+    if not os.access(args.config, os.R_OK):
+        print 'specified config file is not readable'
+        sys.exit(1)
+    if not os.access(args.config, os.W_OK):
+        # TODO: logging
+        print 'WARNING: specified config file is not wriable'
+    configFile = args.config
+
+if configFile == '':
+    print 'no config file available'
+    sys.exit(1)
 
 
+# TODO: logging
+print 'INFO: using config file: %s' % configFile
 configParser = ConfigParser.RawConfigParser()
-configParser.read('telegram-notify.conf')
+configParser.read(configFile)
 
 spool_dir = configParser.get('general', 'spool_dir')
 if not os.path.isdir(spool_dir):
@@ -189,7 +221,6 @@ bot = telepot.Bot(token)
 MessageLoop(bot, handle).run_as_thread()
 print 'I am listening ...'
 
-# TODO: send message if files present in spool at start
 checkFiles()
 
 observer = Observer()