From 6d53dcc8afc79ac1357825519355f7ca0bb73f36 Mon Sep 17 00:00:00 2001
From: Adam Yeats <adam.yeats@grafana.com>
Date: Thu, 21 Sep 2023 14:18:22 +0200
Subject: [PATCH] Find and replace existing comment when creating a PR build

---
 .github/workflows/pull-request-image.yml | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/.github/workflows/pull-request-image.yml b/.github/workflows/pull-request-image.yml
index 426d80b3..e07bc9b0 100644
--- a/.github/workflows/pull-request-image.yml
+++ b/.github/workflows/pull-request-image.yml
@@ -99,7 +99,28 @@ jobs:
     runs-on: ubuntu-latest
     needs: push_to_registry
     steps:
+      - name: Find previous comment (if any)
+        uses: peter-evans/find-comment@v2
+        id: fc
+        with:
+          issue-number: 1
+          body-includes: Use the following command to run this PR with Docker
+      - name: Use that secret output (protected by a mask)
+        run: |
+          echo "output was ${{ steps.fc.outputs.comment-id }}"
+      - name: Update comment on PR
+        if: steps.fc.outputs.comment-id != ''
+        uses: peter-evans/create-or-update-comment@v3
+        with:
+          issue-number: ${{ github.event.number }}
+          body: |
+            Use the following command to run this PR with Docker at http://localhost:3000:
+
+              ```
+              docker run --rm -p 3000:3000 grafana/plugin-builds:${{ github.event.pull_request.head.sha }}pre
+              ```
       - name: Add comment to PR
+        if: steps.fc.outputs.comment-id == ''
         uses: peter-evans/create-or-update-comment@v3
         with:
           issue-number: ${{ github.event.number }}