add script to generate Schemastore's schema for rockcraft.yaml

.github/scripts/requirements.txt

@@ -0,0 +1,3 @@
+craft_application>=1.2.1
+craft_cli>=2.5.0
+craft_parts>=1.26.1

.github/scripts/schema.py

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+# -*- Mode:Python; indent-tabs-mode:nil; tab-width:4 -*-
+#
+# Copyright 2024 Canonical Ltd.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Creation of schema for rockcraft.yaml."""
+import json
+import sys
+from typing import TYPE_CHECKING
+
+from craft_parts import Part
+
+sys.path.append("rockcraft")
+
+from rockcraft import errors  # noqa: E402
+from rockcraft.models.project import Project  # noqa: E402
+
+if TYPE_CHECKING:
+    import argparse
+
+
+def generate_project_schema() -> str:
+    """Generate the schema."""
+    project = Project(
+        name="placeholder",
+        version="1.0",
+        summary="summary",
+        description="description",
+        base="[email protected]",
+        parts=[],
+        license="MIT",
+        platforms={"amd64": None},
+    )
+    project_schema = project.schema(by_alias=True)
+
+    part = Part(name="placeholder", data={})
+    part_schema = part.spec.schema(by_alias=True)
+
+    project_schema["properties"]["parts"]["additionalProperties"] = {
+        "$ref": "#/definitions/Part"
+    }
+    project_schema["definitions"]["Part"] = part_schema
+
+    return json.dumps(project_schema, indent=2)
+
+
+if __name__ == "__main__":
+    print(generate_project_schema())