Add a version option

src/mtg_archetypes/__init__.py

@@ -19,6 +19,7 @@
     "CardRequirement",
     "ClassificationResult",
     "SignatureGroup",
+    "__version__",
     "expand_card_counts",
     "normalize_card_name",
     "parse_decklist_text",

src/mtg_archetypes/cli.py

@@ -5,6 +5,7 @@
 import sys
 from pathlib import Path
 
+from . import __version__
 from .cards import parse_decklist_text
 from .engine import ArchetypeClassifier
 
@@ -15,6 +16,11 @@ def main(args: list[str] | None = None) -> int:
         prog="mtg-archetypes",
         description="A fast MTG deck archetype classifier for common formats.",
     )
+    parser.add_argument(
+        "--version",
+        action="version",
+        version=f"%(prog)s {__version__}",
+    )
     parser.add_argument(
         "format",
         help=(

tests/test_cli.py

@@ -4,6 +4,9 @@
 import json
 from unittest.mock import patch
 
+import pytest
+
+from mtg_archetypes import __version__
 from mtg_archetypes.cli import main
 
 
@@ -91,3 +94,12 @@ def test_cli_default_rules_dir(tmp_path, capsys):
     deck.write_text("60 Plains\n", encoding="utf-8")
     code = main(["legacy", str(deck)])
     assert code == 0
+
+
+def test_cli_version(capsys):
+    """Test that --version prints version and exits with status 0."""
+    with pytest.raises(SystemExit) as excinfo:
+        main(["--version"])
+    assert excinfo.value.code == 0
+    captured = capsys.readouterr()
+    assert captured.out.strip() == f"mtg-archetypes {__version__}"