Add script to automatically keep node version up-to-date

scripts/node_version.py

@@ -0,0 +1,55 @@
+import json
+from pathlib import Path
+
+ROOT = Path(__file__).parent.parent
+TEMPLATED_ROOT = ROOT / "{{cookiecutter.project_slug}}"
+DOCKERFILE = TEMPLATED_ROOT / "compose" / "local" / "node" / "Dockerfile"
+PACKAGE_JSON = TEMPLATED_ROOT / "package.json"
+CI_YML = ROOT / ".github" / "workflows" / "ci.yml"
+
+
+def main():
+    new_version = get_version_from_dockerfile()
+    old_version = get_version_from_package_json()
+    if old_version != new_version:
+        update_package_json_version(old_version, new_version)
+        update_ci_node_version(old_version, new_version)
+
+
+def get_version_from_dockerfile():
+    # Extract version out of base image name:
+    # FROM docker.io/node:22.13-bookworm-slim
+    # -> 22.13
+    with DOCKERFILE.open("r") as f:
+        for line in f:
+            if "FROM docker.io/node:" in line:
+                _, _, docker_tag = line.partition(":")
+                version_str, _, _ = docker_tag.partition("-")
+                return version_str
+
+
+def get_version_from_package_json():
+    package_json = json.loads(PACKAGE_JSON.read_text())
+    return package_json["engines"]["node"]
+
+
+def update_package_json_version(old_version, new_version):
+    package_json_text = PACKAGE_JSON.read_text()
+    package_json_text = package_json_text.replace(
+        f'"node": "{old_version}"',
+        f'"node": "{new_version}"',
+    )
+    PACKAGE_JSON.write_text(package_json_text)
+
+
+def update_ci_node_version(old_version, new_version):
+    yml_content = CI_YML.read_text()
+    yml_content = yml_content.replace(
+        f'node-version: "{old_version}"',
+        f'node-version: "{new_version}"',
+    )
+    CI_YML.write_text(yml_content)
+
+
+if __name__ == "__main__":
+    main()