Only comment on issues if no other comments exist yet

Author: rubensworks

.github/workflows/issue-label-commenter.yml

@@ -7,8 +7,18 @@ jobs:
   comment:
     runs-on: ubuntu-18.04
     steps:
+    - name: get comment count
+      id: getCommentCount
+      env:
+        comments: ${{ github.event.issue.comments }}
+      run: |
+        echo "$comments"
+        CL=$(echo $comments | jq '. | length' )
+        echo "::set-output name=comments_length::$CL"
     - uses: actions/checkout@v2
+      if: steps.getCommentCount.outputs.comments_length == 0
     - uses: peaceiris/actions-label-commenter@v1
+      if: steps.getCommentCount.outputs.comments_length == 0
       with:
         github_token: ${{ secrets.PAT }}
         config_file: .github/issue-commenter.yml