release branch: change workflow

.github/workflows/pr.yaml

@@ -4,25 +4,30 @@ on:
     push:
         branches:
             - 'release/*'
-    pull_request_target:
-        types: [opened, synchronize]
-        branches:
-            - 'release/*'
 
 jobs:
     block_merge:
-        runs-on: ubuntu-20.04
+        runs-on: ubuntu-latest
 
         steps:
             -   name: Checkout code
                 uses: actions/checkout@v2
 
-            -   name: Check for 'Merge branch develop' Commits
-                if: |
-                    github.event.pull_request.base.ref == 'develop' &&
-                    github.event.pull_request.head.ref == 'release/*'
-                run: |
-                    if git log --merges --ancestry-path HEAD^..HEAD --pretty=format:%s | grep -q "Merge branch 'develop'"; then
-                      echo "ERROR: This Pull Request contains a merge commit from 'develop'. Merging from 'develop' is not allowed."
-                      exit 1
-                    fi
+            -   name: Show Base Branch
+                run: "echo Base Branch: ${{ github.event.pull_request.base.ref }}"
+
+            -   name: Show Head Branch
+                run: "echo Head Branch: ${{ github.event.pull_request.head.ref }}"
+
+#            -   name: Check for 'Merge branch develop' Commits
+#                if: |
+#                    github.event.pull_request.base.ref == 'develop' &&
+#                    github.event.pull_request.head.ref == 'release/*'
+#
+#                run: |
+#                    set -e
+#                    git fetch origin "+refs/pull/${{ github.event.pull_request.number }}/merge:"
+#                    if git log --merges --pretty=format:'%s' FETCH_HEAD | grep -q "Merge branch 'develop'"; then
+#                      echo "ERROR: This Pull Request contains a merge commit from 'develop'. Merging from 'develop' is not allowed."
+#                      exit 1
+#                    fi