Add error on non-list target-version in config file (#1284)

2020-05-08 08:01:42 -05:00 · 2020-05-08 08:01:42 -05:00 · 9938c92fd7
commit 9938c92fd7
parent 544ea9c217
1 changed files with 6 additions and 0 deletions
--- a/black.py
+++ b/black.py
@ -296,6 +296,12 @@ def read_pyproject_toml(
    if not config:
        return None

+    target_version = config.get("target_version")
+    if target_version is not None and not isinstance(target_version, list):
+        raise click.BadOptionUsage(
+            "target-version", f"Config key target-version must be a list"
+        )
+
    default_map: Dict[str, Any] = {}
    if ctx.default_map:
        default_map.update(ctx.default_map)