Validate json files that were changed on PR

.github/workflows/ci.yml

@@ -31,9 +31,17 @@ jobs:
         uses: actions/checkout@v4
         with:
           path: custom
+          fetch-depth: 0
 
       - name: Install Python dependencies for custom project generation
-        run: python -m pip install pyyaml
+        run: |
+          python -m pip install pyyaml
+          python -m pip install requests
+
+      - name: Get changed info.json files and validate them
+        working-directory: custom
+        run: |
+          git diff origin/main --name-only | grep info\\.json | xargs python src/validate_info_json.py $1
 
       - name: Test python scripts
         working-directory: custom

src/validate_info_json.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+
+"""Validate the custom app json file passed in as an argument
+Making sure we are using https for ZIM the file,
+and that it is downloadable
+"""
+
+from brand import Brand
+import argparse
+import info_parser
+import json
+import requests
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Validator for custom apps info.json file")
+    parser.add_argument(
+        "info_json",
+        help="The info.json file to be verified",
+        type=str
+    )
+    args = parser.parse_args()
+    return _is_valid(args.info_json)
+    
+def _is_valid(info_json):
+    with open(info_json, 'r') as info_file:
+        content = info_file.read()
+        data = json.loads(content)
+        zim_url = data[info_parser.JSON_KEY_ZIM_URL]
+
+        # is https
+        assert zim_url.startswith(
+            "https://"), "ZIM URL is not using https: {}".format(zim_url)
+
+        # try a head request on it
+        response = requests.head(zim_url)
+
+        # is reachable
+        assert response.status_code in [200, 302], "ZIM URL is not reachable: {} response code: {}".format(
+            response.url, response)
+
+
+if __name__ == "__main__":
+    main()