CLI version option

openapi_spec_validator/__main__.py

@@ -6,6 +6,7 @@
 from jsonschema.exceptions import ValidationError
 from jsonschema.exceptions import best_match
 
+from openapi_spec_validator import __version__
 from openapi_spec_validator.readers import read_from_filename
 from openapi_spec_validator.readers import read_from_stdin
 from openapi_spec_validator.shortcuts import validate
@@ -51,7 +52,7 @@ def print_validationerror(
 
 
 def main(args: Sequence[str] | None = None) -> None:
-    parser = ArgumentParser()
+    parser = ArgumentParser(prog="openapi-spec-validator")
     parser.add_argument(
         "file",
         nargs="+",
@@ -72,6 +73,11 @@ def main(args: Sequence[str] | None = None) -> None:
         metavar="{detect,2.0,3.0,3.1}",
         help="OpenAPI schema version (default: detect).",
     )
+    parser.add_argument(
+        "--version",
+        action="version",
+        version=f"%(prog)s {__version__}",
+    )
     args_parsed = parser.parse_args(args)
 
     for filename in args_parsed.file:

tests/integration/test_main.py

@@ -3,6 +3,7 @@
 
 import pytest
 
+from openapi_spec_validator import __version__
 from openapi_spec_validator.__main__ import main
 
 
@@ -190,3 +191,13 @@ def test_schema_stdin(capsys):
     out, err = capsys.readouterr()
     assert not err
     assert "stdin: OK\n" in out
+
+
+def test_version(capsys):
+    """Test --version flag outputs correct version."""
+    testargs = ["--version"]
+    with pytest.raises(SystemExit):
+        main(testargs)
+    out, err = capsys.readouterr()
+    assert not err
+    assert out.strip() == f"openapi-spec-validator {__version__}"