Add separate function for validating YAML

Signed-off-by: John Pennycook <[email protected]>

codebasin/config.py

@@ -571,8 +571,7 @@ def load(config_file, rootdir):
         raise RuntimeError(f"Could not open {config_file!s}.")
 
     # Validate config against a schema
-    # We don't use any advanced features of YAML, so can use JSON here
-    util._validate_json(config, schema_name="config")
+    util._validate_yaml(config, schema_name="config")
 
     # Read codebase definition
     if "codebase" in config:

codebasin/util.py

@@ -167,6 +167,38 @@ def _validate_json(json_object: object, schema_name: str) -> bool:
     return True
 
 
+def _validate_yaml(yaml_object: object, schema_name: str) -> bool:
+    """
+    Validate YAML against a schema.
+
+    Parameters
+    ----------
+    yaml_object : Object
+        The YAML to validate.
+
+    schema_name : {'config'}
+        The schema to validate against.
+
+    Returns
+    -------
+    bool
+        True if the YAML is valid.
+
+    Raises
+    ------
+    ValueError
+        If the YAML fails to validate, or the schema name is unrecognized.
+
+    RuntimeError
+        If the schema file cannot be located.
+    """
+    if schema_name != "config":
+        raise ValueError("Unrecognized schema name.")
+
+    # We don't use any advanced features of YAML, so can use JSON here
+    return _validate_json(yaml_object, schema_name)
+
+
 def _load_json(file_object: typing.TextIO, schema_name: str) -> object:
     """
     Load JSON from file and validate it against a schema.