fix: reflect the change in the schema, too

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

Author: henryiii

src/scikit_build_core/resources/scikit-build.schema.json

@@ -647,7 +647,8 @@
             "$ref": "#/properties/build-dir"
           },
           "fail": {
-            "$ref": "#/properties/fail"
+            "type": "boolean",
+            "description": "Immediately fail the build. This is only useful in overrides."
           }
         }
       }

src/scikit_build_core/settings/json_schema.py

@@ -97,6 +97,8 @@ def to_json_schema(dclass: type[Any], *, normalize_keys: bool) -> dict[str, Any]
         props[field.name]["description"] = docs[field.name].split("\n", maxsplit=1)[0]
         if field.metadata.get("deprecated"):
             props[field.name]["deprecated"] = True
+        if field.metadata.get("override_only"):
+            props[field.name]["scikit-build:override-only"] = True
 
     if normalize_keys:
         props = {k.replace("_", "-"): v for k, v in props.items()}

src/scikit_build_core/settings/skbuild_schema.py

@@ -82,7 +82,21 @@ def generate_skbuild_schema(tool_name: str = "scikit-build") -> dict[str, Any]:
         m: {"$ref": "#/$defs/metadata"} for m in METADATA
     }
 
+    inherit_only_props = {
+        k: v
+        for k, v in schema["properties"].items()
+        if v.get("scikit-build:override-only")
+    }
+    for v in inherit_only_props.values():
+        del v["scikit-build:override-only"]
+    schema["properties"] = {
+        k: v
+        for k, v in schema["properties"].items()
+        if not v.get("scikit-build:override-only")
+    }
     props = {k: {"$ref": f"#/properties/{k}"} for k in schema["properties"]}
+    props.update(inherit_only_props)
+
     schema["$defs"]["if_overrides"] = {
         "type": "object",
         "minProperties": 1,