support of new schema in systemd units

src/ahriman/application/ahriman.py

@@ -83,6 +83,9 @@ def _parser() -> argparse.ArgumentParser:
                         action=argparse.BooleanOptionalAction, default=True)
     parser.add_argument("-r", "--repository", help="target repository. For several subcommands it can be used "
                                                    "multiple times", action="append")
+    # special secret argument for systemd unit. The issue is that systemd doesn't allow multiple arguments to template
+    # name. This parameter accepts [[arch]-repo] in order to keep backward compatibility
+    parser.add_argument("--repository-id", help=argparse.SUPPRESS)
     parser.add_argument("-q", "--quiet", help="force disable any logging", action="store_true")
     parser.add_argument("--unsafe", help="allow to run ahriman as non-ahriman user. Some actions might be unavailable",
                         action="store_true")

src/ahriman/application/handlers/handler.py

@@ -124,6 +124,15 @@ class Handler:
         # pylint, wtf???
         root = configuration.getpath("repository", "root")  # pylint: disable=assignment-from-no-return
 
+        # preparse systemd repository-id argument
+        # we are using unescaped values, so / is not allowed here, because it is impossible to separate if from dashes
+        if args.repository_id is not None:
+            # repository parts is optional for backward compatibility
+            architecture, *repository_parts = args.repository_id.split("/")
+            args.architecture = [architecture]
+            if repository_parts:
+                args.repository = ["-".join(repository_parts)]  # replace slash with dash
+
         # extract repository names first
         names = args.repository
         if names is None:  # try to read file system first