feat: fast schema validation

Makefile

@@ -35,7 +35,7 @@ lint:
 	# Linter performs static analysis to catch latent bugs
 	pylint --rcfile .pylintrc samtranslator
 	# Ensure templates adhere to JSON schema
-	bin/validate.sh
+	bin/validate_schema.py
 
 prepare-companion-stack:
 	pytest -v --no-cov integration/setup -m setup

bin/validate_schema.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+
+import json
+from pathlib import Path
+from typing import Iterator
+
+from cfn_flip import to_json  # type: ignore
+from jsonschema import validate
+
+SCHEMA = json.loads(Path("samtranslator/schema/schema.json").read_bytes())
+
+
+def get_templates() -> Iterator[Path]:
+    paths = (
+        list(Path("tests/translator/input").glob("**/*.yaml"))
+        + list(Path("tests/translator/input").glob("**/*.yml"))
+        + list(Path("integration/resources/templates").glob("**/*.yaml"))
+        + list(Path("integration/resources/templates").glob("**/*.yml"))
+    )
+    # TODO: Enable (most likely) everything but error_
+    skips = [
+        "error_",
+        "unsupported_resources",
+        "resource_with_invalid_type",
+    ]
+
+    def should_skip(s: str) -> bool:
+        for skip in skips:
+            if skip in s:
+                return True
+        return False
+
+    for path in paths:
+        if not should_skip(str(path)):
+            yield path
+
+
+def main() -> None:
+    for path in get_templates():
+        print(f"Checking {path}")
+        obj = json.loads(to_json(path.read_bytes()))
+        validate(obj, schema=SCHEMA)
+
+
+if __name__ == "__main__":
+    main()