Add --version option to pyreverse (#8257) (#8258)

(cherry picked from commit bd22f28)

Co-authored-by: Andreas Finkler <3929834+DudeNr33@users.noreply.github.com>

doc/whatsnew/fragments/7851.feature

@@ -0,0 +1,3 @@
+Add `--version` option to `pyreverse`.
+
+Refs #7851

pylint/pyreverse/main.py

@@ -213,6 +213,12 @@ class Run(_ArgumentsManager, _ArgumentsProvider):
     name = "pyreverse"
 
     def __init__(self, args: Sequence[str]) -> NoReturn:
+        # Immediately exit if user asks for version
+        if "--version" in args:
+            print("pyreverse is included in pylint:")
+            print(constants.full_version)
+            sys.exit(0)
+
         _ArgumentsManager.__init__(self, prog="pyreverse", description=__doc__)
         _ArgumentsProvider.__init__(self, self)
 

tests/pyreverse/test_main.py

@@ -189,3 +189,16 @@ def test_class_command(
     )
     assert "data.clientmodule_test.Ancestor" in runner.config.classes
     assert "data.property_pattern.PropertyPatterns" in runner.config.classes
+
+
+def test_version_info(
+    monkeypatch: pytest.MonkeyPatch, capsys: pytest.CaptureFixture
+) -> None:
+    """Test that it is possible to display the version information."""
+    test_full_version = "1.2.3.4"
+    monkeypatch.setattr(main.constants, "full_version", test_full_version)  # type: ignore[attr-defined]
+    with pytest.raises(SystemExit):
+        main.Run(["--version"])
+    out, _ = capsys.readouterr()
+    assert "pyreverse is included in pylint" in out
+    assert test_full_version in out