Update Earthfile

Author: minikin

utilities/project-fields-validator/Earthfile

@@ -4,29 +4,27 @@ IMPORT github.com/input-output-hk/catalyst-ci/earthly/python:v3.1.7 AS python-ci
 
 test:
     FROM python-ci+python-base
-
     COPY . .
-
     DO python-ci+CHECK
 
 validate-pr:
     FROM python-ci+python-base
-
     COPY . .
-
-    RUN pip install requests
+    RUN pip install requests jq
 
     ENV PROJECT_NUMBER=102
     ARG GITHUB_TOKEN
-    ARG GITHUB_REPOSITORY
-    ARG GITHUB_EVENT_NUMBER
 
-    RUN --secret GITHUB_TOKEN python3 main.py
+    # Extract PR info from GitHub event context
+    RUN --secret GITHUB_TOKEN \
+        if [ -f "$GITHUB_EVENT_PATH" ]; then \
+            PR_NUMBER=$(jq --raw-output .pull_request.number "$GITHUB_EVENT_PATH"); \
+            REPO=$(jq --raw-output .repository.full_name "$GITHUB_EVENT_PATH"); \
+            export GITHUB_EVENT_NUMBER=$PR_NUMBER; \
+            export GITHUB_REPOSITORY=$REPO; \
+        fi && \
+        python3 main.py
 
 VALIDATE_PROJECT_FIELDS:
     FUNCTION
-
-    ARG GITHUB_REPOSITORY
-    ARG GITHUB_EVENT_NUMBER
-
-    FROM +validate-pr
+    DO +validate-pr