feat: API call in main merge (#6)

.github/workflows/pr-open.yml

@@ -4,7 +4,7 @@ on:
   merge_group:
   pull_request:
   push:
-    branches: [main]
+    # branches: [main]
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}

action.yml

@@ -43,7 +43,15 @@ runs:
         elif [ ${{ github.event_name }} == 'push' ]
         then
           echo "Event type: push"
-          pr=$(echo ${{ github.event.head_commit.message }} |( grep -Eo "pr-[0-9]+" || true )| cut -d '-' -f2)
+          # HEAD=$(git log main --oneline | head -n1 | awk '{print $1}')
+          HEAD=${{ github.event.after }}
+          pr=$(\
+            curl -L -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${{ github.token }}" \
+              -H "X-GitHub-Api-Version: 2022-11-28" \
+              https://api.github.com/repos/${{ github.repository }}/commits/${HEAD}/pulls \
+                | jq .[0].number
+          )
+
           if [ -z "${pr}" ]
           then
             echo "No PR number found. Was this push triggered by a squashed PR merge?"
@@ -54,7 +62,7 @@ runs:
         fi
 
         # Validate PR number
-        if [ ! "${PR_NO}" =~ ^[0-9]+$ ]; then
+        if [[ ! "${pr}" =~ ^[0-9]+$ ]]; then
           echo "PR number format incorrect: ${pr}"
           exit 1
         fi