Add '--setopt' option for setting config options from the command-line

osc/commandline.py

@@ -383,6 +383,13 @@ def init_arguments(self):
             metavar="FILE",
             help="specify alternate configuration file",
         )
+        self.add_argument(
+            "--setopt",
+            metavar="KEY=VALUE",
+            action="append",
+            default=[],
+            help="set a config option for the current program run",
+        )
         self.add_argument(
             "--no-keyring",
             action="store_true",
@@ -401,6 +408,11 @@ def post_parse_args(self, args):
                 # let's leave setting the right value to conf.get_config()
                 pass
 
+        overrides = {}
+        for i in args.setopt:
+            key, value = i.split("=")
+            overrides[key] = value
+
         try:
             conf.get_config(
                 override_apiurl=args.apiurl,
@@ -412,6 +424,7 @@ def post_parse_args(self, args):
                 override_post_mortem=args.post_mortem,
                 override_traceback=args.traceback,
                 override_verbose=args.verbose,
+                overrides=overrides,
             )
         except oscerr.NoConfigfile as e:
             print(e.msg, file=sys.stderr)

osc/conf.py

@@ -232,11 +232,13 @@ def apply_option_types(config, conffile=""):
     cp = OscConfigParser.OscConfigParser(config)
     cp.add_section("general")
 
-    typed_opts = ((_boolean_opts, cp.getboolean), (_integer_opts, cp.getint))
-    for opts, meth in typed_opts:
+    typed_opts = ((_boolean_opts, cp.getboolean, bool), (_integer_opts, cp.getint, int))
+    for opts, meth, typ in typed_opts:
         for opt in opts:
             if opt not in config:
                 continue
+            if isinstance(config[opt], typ):
+                continue
             try:
                 config[opt] = meth('general', opt)
             except ValueError as e:
@@ -750,7 +752,9 @@ def get_config(override_conffile=None,
                override_traceback=None,
                override_post_mortem=None,
                override_no_keyring=None,
-               override_verbose=None):
+               override_verbose=None,
+               overrides=None
+               ):
     """do the actual work (see module documentation)"""
     global config
 
@@ -786,6 +790,17 @@ def get_config(override_conffile=None,
         raise oscerr.ConfigError(msg, conffile)
 
     config = dict(cp.items('general', raw=1))
+
+    # if the overrides trigger an exception, the 'post_mortem' option
+    # must be set to the appropriate type otherwise the non-empty string gets evaluated as True
+    config = apply_option_types(config, conffile)
+
+    overrides = overrides or {}
+    for key, value in overrides.items():
+        if key not in config:
+            raise oscerr.ConfigError(f"Unknown config option '{key}'", "<command-line>")
+        config[key] = value
+
     config['conffile'] = conffile
 
     config = apply_option_types(config, conffile)