update comment if already exists in pull request

Author: jeromevdl

.github/workflows/build.yml

@@ -71,18 +71,16 @@ jobs:
         id: artifacts-size-report
         if: ${{ matrix.java == '11.0.x' }} # do it once
         run: |
-          report='## Artifacts Size Report\n\n'
-          report+='| Module | Version | Size |\n'
-          report+='| --- | --- | --- |\n'
+          echo '## Artifacts Size Report' > report.md
+          echo '| Module | Version | Size |' >> report.md
+          echo '| --- | --- | --- |' >> report.md
           artifact_version=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)
           for artifact in $(cat target/powertools-parent-*.buildinfo | grep 'outputs.*.jar' | grep -v 'sources.jar'); do
             artifact_name=$(echo "$artifact" | cut -d '=' -f2)
             artifact_name=${artifact_name%-$artifact_version.jar}
             artifact_size=$(grep "${artifact%%.filename*}.length" target/powertools-parent-*.buildinfo | cut -d '=' -f2)
-            echo "$artifact_name = $artifact_size"
-            report+="| ${artifact_name} | ${artifact_version} | ${artifact_size} |\n"
+            echo "| ${artifact_name} | ${artifact_version} | ${artifact_size} |" >> report.md
           done
-          echo "ARTIFACT_REPORT=$report" >> "$GITHUB_OUTPUT"
       - name: Find potential existing report
         if: ${{ matrix.java == '11.0.x' }} # do it once
         uses: peter-evans/find-comment@a54c31d7fa095754bfef525c0c8e5e5674c4b4b1 # 2.4.0
@@ -91,13 +89,13 @@ jobs:
           issue-number: ${{ github.event.pull_request.number }}
           comment-author: 'github-actions[bot]'
           body-includes: Artifacts Size Report
-      - name: Artifacts size report in comment
+      - name: Write artifacts size report in comment
         if: ${{ matrix.java == '11.0.x' }} # do it once
         uses: peter-evans/create-or-update-comment@c6c9a1a66007646a28c153e2a8580a5bad27bcfa # 3.0.2
         with:
           comment-id: ${{ steps.find-comment.outputs.comment-id }}
           issue-number: ${{ github.event.pull_request.number }}
-          body: "${{ steps.artifacts-size-report.outputs.ARTIFACT_REPORT }}"
+          body-path: 'report.md'
           edit-mode: replace
   savepr:
     runs-on: ubuntu-latest