properly implement -c,--config option

gallery_dl/__init__.py

@@ -24,13 +24,13 @@ def build_cmdline_parser():
         description='Download images from various sources')
     parser.add_argument(
         "-c", "--config",
-        default="~/.config/gallery/config", metavar="CFG",
-        help="alternate configuration file"
+        metavar="CFG", dest="cfgfiles", action="append",
+        help="additional configuration files",
     )
     parser.add_argument(
         "-d", "--dest",
         metavar="DEST",
-        help="destination directory"
+        help="destination directory",
     )
     parser.add_argument(
         "-o", "--option",
@@ -43,7 +43,7 @@ def build_cmdline_parser():
     )
     parser.add_argument(
         "--list-keywords", dest="keywords", action="store_true",
-        help="print a list of available keywords",
+        help="print a list of available keywords for the given URLs",
     )
     parser.add_argument(
         "urls",
@@ -58,6 +58,9 @@ def main():
         parser = build_cmdline_parser()
         args = parser.parse_args()
 
+        if args.cfgfiles:
+            config.load(*args.cfgfiles, strict=True)
+
         if args.dest:
             config.set(("base-directory",), args.dest)
 

gallery_dl/config.py

@@ -16,7 +16,7 @@ import platform
 # --------------------------------------------------------------------
 # public interface
 
-def load(*files):
+def load(*files, strict=False):
     """Load JSON configuration files"""
     configfiles = files or _default_configs
     for conf in configfiles:
@@ -26,6 +26,8 @@ def load(*files):
                 confdict = json.load(file)
             _config.update(confdict)
         except FileNotFoundError:
+            if strict:
+                raise
             continue
         except json.decoder.JSONDecodeError as exception:
             print("Error while loading '", path, "':", sep="", file=sys.stderr)