Add support for multiple keyrings

We want all @archlinux.org keys in one place, so they can all be
exported to WKD (#142). This commit adds basic support for the expected
keyrings we need in the short term (support staff and service accounts
(ex: @renovate)).

Fix #141

libkeyringctl/cli.py

@@ -15,6 +15,7 @@ from .keyring import convert
 from .keyring import export
 from .keyring import inspect_keyring
 from .keyring import list_keyring
+from .types import Keyring
 from .types import TrustFilter
 from .util import absolute_path
 from .util import cwd
@@ -32,6 +33,12 @@ parser.add_argument(
     default=False,
     help="force the execution of subcommands (e.g. overwriting of files)",
 )
+parser.add_argument(
+    "--keyring",
+    choices=[e.value for e in Keyring],
+    default=Keyring.packager.value,
+    help="Keyring to use",
+)
 subcommands = parser.add_subparsers(dest="subcommand")
 
 convert_parser = subcommands.add_parser(
@@ -143,6 +150,8 @@ def main() -> None:  # noqa: ignore=C901
     with TemporaryDirectory(prefix="arch-keyringctl-") as tempdir:
         project_root = Path(".").absolute()
         keyring_root = Path("keyring").absolute()
+        if args.keyring != "packager":
+            keyring_root = Path(args.keyring).absolute()
         working_dir = Path(tempdir)
         debug(f"Working directory: {working_dir}")
         with cwd(working_dir):

libkeyringctl/types.py

@@ -10,6 +10,12 @@ Username = NewType("Username", str)
 PacketKind = NewType("PacketKind", str)
 
 
+class Keyring(Enum):
+    packager = "packager"
+    support = "support"
+    service = "service"
+
+
 class Trust(Enum):
     unknown = auto
     revoked = auto()