Build contributed recipes in PRs (#2212)

* Build contributed recipes in PRs

* Fix GitHub matrix

docs/using/recipe_code/generate_matrix.py

@@ -2,24 +2,39 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
 import json
-import os
 from pathlib import Path
 from typing import Any
 
 THIS_DIR = Path(__file__).parent.resolve()
-REPOSITORY_OWNER = os.environ["REPOSITORY_OWNER"]
 
 
-def generate_matrix() -> dict[str, Any]:
-    dockerfiles = sorted(file.name for file in THIS_DIR.glob("*.dockerfile"))
+def generate_matrix() -> Any:
+    dockerfiles = sorted(THIS_DIR.glob("*.dockerfile"))
     runs_on = ["ubuntu-24.04", "ubuntu-22.04-arm"]
-    return {
-        "dockerfile": dockerfiles,
-        "runs-on": runs_on,
-        "exclude": [
-            {"dockerfile": "oracledb.dockerfile", "runs-on": "ubuntu-22.04-arm"}
-        ],
-    }
+
+    configurations = []
+    for dockerfile in dockerfiles:
+        dockerfile_name = dockerfile.name
+        for run in runs_on:
+            if dockerfile_name == "oracledb.dockerfile" and run == "ubuntu-22.04-arm":
+                continue
+            dockerfile_lines = dockerfile.read_text().splitlines()
+            base_image = [
+                line for line in dockerfile_lines if line.startswith("ARG BASE_IMAGE=")
+            ][0][15:]
+            base_image_short = base_image[base_image.rfind("/") + 1 :]
+            # Handling a case of `docker.io/jupyter/base-notebook:notebook-6.5.4` image
+            if ":" in base_image_short:
+                base_image_short = ""
+            configurations.append(
+                {
+                    "dockerfile": dockerfile_name,
+                    "runs-on": run,
+                    "platform": "x86_64" if run == "ubuntu-24.04" else "aarch64",
+                    "parent-image": base_image_short,
+                }
+            )
+    return {"include": configurations}
 
 
 if __name__ == "__main__":