Soft comparison of --required-version

CHANGES.md

@@ -1,5 +1,11 @@
 # Change Log
 
+## Unreleased
+
+### Configuration
+
+- Add support for specifying stable version with `--required-version` (#2832).
+
 ## 22.1.0
 
 At long last, _Black_ is no longer a beta product! This is the first non-beta release

src/black/__init__.py

@@ -474,7 +474,11 @@ def main(
                 out(f"Using configuration in '{config}'.", fg="blue")
 
     error_msg = "Oh no! 💥 💔 💥"
-    if required_version and required_version != __version__:
+    if (
+        required_version
+        and required_version != __version__
+        and required_version != __version__.split(".")[0]
+    ):
         err(
             f"{error_msg} The required version `{required_version}` does not match"
             f" the running version `{__version__}`!"

tests/test_black.py

@@ -1198,6 +1198,13 @@ def test_required_version_matches_version(self) -> None:
             ignore_config=True,
         )
 
+    def test_required_version_matches_partial_version(self) -> None:
+        self.invokeBlack(
+            ["--required-version", black.__version__.split(".")[0], "-c", "0"],
+            exit_code=0,
+            ignore_config=True,
+        )
+
     def test_required_version_does_not_match_version(self) -> None:
         result = BlackRunner().invoke(
             black.main,