test: validate all metadata.yaml files against schema in pytest

.pre-commit-config.yaml

@@ -47,6 +47,7 @@ repos:
         name: Validate RPM package metadata
         files: ^rpms/[^/]+/metadata\.yaml$
         args: [--schemafile, schema/metadata.json]
+        language_version: python3.11
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: v0.14.7

pyproject.toml

@@ -6,4 +6,6 @@ requires-python = ">=3.11"
 [dependency-groups]
 dev = [
     "pytest>=8",
+    "jsonschema>=4",
+    "pyyaml>=6",
 ]

tests/test_metadata.py

@@ -0,0 +1,36 @@
+"""Validate every rpms/*/metadata.yaml against schema/metadata.json."""
+
+import json
+from pathlib import Path
+
+import jsonschema
+import pytest
+import yaml
+
+REPO_ROOT = Path(__file__).parent.parent
+SCHEMA_FILE = REPO_ROOT / "schema" / "metadata.json"
+RPMS_DIR = REPO_ROOT / "rpms"
+
+
+@pytest.fixture(scope="session")
+def schema():
+    with open(SCHEMA_FILE) as f:
+        return json.load(f)
+
+
+def metadata_files():
+    return sorted(RPMS_DIR.glob("*/metadata.yaml"))
+
+
+@pytest.mark.parametrize("metadata_file", metadata_files(), ids=lambda p: p.parent.name)
+def test_metadata_valid(metadata_file, schema):
+    with open(metadata_file) as f:
+        data = yaml.safe_load(f)
+
+    validator = jsonschema.Draft7Validator(schema)
+    errors = sorted(validator.iter_errors(data), key=str)
+
+    assert not errors, "\n".join(
+        f"  {'.'.join(str(p) for p in e.absolute_path) or '(root)'}: {e.message}"
+        for e in errors
+    )