[Internal] Add test instructions for external contributors

.github/workflows/external-message.yml

@@ -0,0 +1,64 @@
+name: PR Comment
+
+#WARNING:
+# THIS WORKFLOW ALWAYS RUNS FOR EXTERNAL CONTRIBUTORS WITHOUT ANY APPROVAL.
+# DO NOT PULL THE PR OR EXECUTE ANY CODE FROM THE PR.
+
+on:
+  pull_request_target:
+    types: [opened, reopened, synchronize]
+    branches:
+      - main
+
+
+
+jobs:
+  comment-on-pr:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - name: Check if external contribution
+        id: check_fork
+        run: |
+          if [ "${{ github.event.pull_request.head.repo.full_name }}" != "${{ github.repository }}" ]; then
+            echo "is_fork=true" >> $GITHUB_OUTPUT
+          else
+            echo "is_fork=false" >> $GITHUB_OUTPUT
+          fi
+
+      - uses: actions/checkout@v4
+
+      - name: Delete old comments
+        if: steps.check_fork.outputs.is_fork == 'true'
+        env:
+           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+            # Delete previous comment if it exists
+            previous_comment_ids=$(gh api "repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments" \
+              --jq '.[] | select(.body | startswith("<!-- INTEGRATION_TESTS -->")) | .id')
+            echo "Previous comment IDs: $previous_comment_ids"
+            # Iterate over each comment ID and delete the comment
+            if [ ! -z "$previous_comment_ids" ]; then
+              echo "$previous_comment_ids" | while read -r comment_id; do
+                echo "Deleting comment with ID: $comment_id"
+                gh api "repos/${{ github.repository }}/issues/comments/$comment_id" -X DELETE
+              done
+            fi
+
+      - name: Comment on PR
+        if: steps.check_fork.outputs.is_fork == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh pr comment ${{ github.event.pull_request.number }} --body \
+          "<!-- INTEGRATION_TESTS -->
+          Run integration tests manually:
+          [go/deco-tests-run/sdk-go](https://go/deco-tests-run/sdk-go)
+
+          Inputs:
+          PR Number:${{github.event.pull_request.number}}
+          Commit SHA:${{ github.event.pull_request.head.sha }}
+          
+          Checks will be approved automatically on success.
+          "

.github/workflows/integration-tests.yml

@@ -9,8 +9,9 @@ on:
 
 
 jobs:
+  # Secrests are not available for forks.
   trigger-tests:
-    if: github.event_name == 'pull_request'
+    if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
     name: Trigger Tests
     runs-on: ubuntu-latest
     environment: "test-trigger-is"