Improved config/argument behaviour

The configuration file is now properly overridden by argument parsing.
This was accomplished by loading the config file, then treating the
specified options as a namespace for the ArgumentParser.  This makes
things from the config file get overridden iff they were specified on
the command line (not simply from defaults set in the ArgumentParser).

1 files changed, 56 insertions, 0 deletions

diff --git a/config.py b/config.py
new file mode 100644
index 0000000..21b4ec2
--- /dev/null
+++ b/config.py
@@ -0,0 +1,56 @@
+# This is part of Kaylee
+# -- this code is licensed GPLv3
+# Copyright 2013 Jezra
+# Copyright 2015 Clayton G. Hobbs
+
+import json
+import os
+from argparse import ArgumentParser, Namespace
+
+from gi.repository import GLib
+
+class Config:
+    conf_dir = os.path.expanduser(os.path.join(GLib.get_user_config_dir(),
+                                               "blather"))
+    opt_file = os.path.join(conf_dir, "options.json")
+
+    def __init__(self):
+        # Set up the argument parser
+        self.parser = ArgumentParser()
+        self.parser.add_argument("-i", "--interface", type=str,
+                dest="interface", action='store',
+                help="Interface to use (if any). 'g' for GTK or 'gt' for GTK" +
+                " system tray icon")
+
+        self.parser.add_argument("-c", "--continuous",
+                action="store_true", dest="continuous", default=False,
+                help="starts interface with 'continuous' listen enabled")
+
+        self.parser.add_argument("-p", "--pass-words",
+                action="store_true", dest="pass_words", default=False,
+                help="passes the recognized words as arguments to the shell" +
+                " command")
+
+        self.parser.add_argument("-H", "--history", type=int,
+                action="store", dest="history",
+                help="number of commands to store in history file")
+
+        self.parser.add_argument("-m", "--microphone", type=int,
+                action="store", dest="microphone", default=None,
+                help="Audio input card to use (if other than system default)")
+
+        self.parser.add_argument("--valid-sentence-command", type=str,
+                dest="valid_sentence_command", action='store',
+                help="command to run when a valid sentence is detected")
+
+        self.parser.add_argument("--invalid-sentence-command", type=str,
+                dest="invalid_sentence_command", action='store',
+                help="command to run when an invalid sentence is detected")
+
+        # Read the configuration file
+        with open(self.opt_file, 'r') as f:
+            self.options = json.load(f)
+            self.options = Namespace(**self.options)
+
+        # Parse command-line arguments, overriding config file as appropriate
+        self.args = self.parser.parse_args(namespace=self.options)