bevy/.github/workflows/example-run-report.yml

name: Example Run - PR Comments

# This workflow has write permissions on the repo
# It must not checkout a PR and run untrusted code

# Also requesting write permissions on PR to be able to comment
permissions:
  pull-requests: "write"

on:
  workflow_run:
    workflows: ["Example Run"]
    types:
      - completed

jobs:
  make-macos-screenshots-available:
    if: github.event.workflow_run.event == 'pull_request'
    runs-on: ubuntu-latest
    timeout-minutes: 30
    outputs:
      branch-name: ${{ steps.branch-name.outputs.result }}
      pr-number: ${{ steps.pr-number.outputs.result }}
    steps:
      - name: "Download artifact"
        id: find-artifact
        uses: actions/github-script@v7
        with:
          result-encoding: string
          script: |
            var artifacts = await github.rest.actions.listWorkflowRunArtifacts({
              owner: context.repo.owner,
              repo: context.repo.repo,
              run_id: ${{github.event.workflow_run.id }},
            });
            var matchArtifacts = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "screenshots-macos"
            });
            if (matchArtifacts.length == 0) { return "false" }
            var matchArtifact = matchArtifacts[0];
            var download = await github.rest.actions.downloadArtifact({
              owner: context.repo.owner,
              repo: context.repo.repo,
              artifact_id: matchArtifact.id,
              archive_format: 'zip',
            });
            var fs = require('fs');
            fs.writeFileSync('${{github.workspace}}/screenshots-macos.zip', Buffer.from(download.data));
            return "true"            
      - name: prepare artifact folder
        run: |
          unzip screenshots-macos.zip
          mkdir screenshots
          mv screenshots-* screenshots/          
      - name: save screenshots
        uses: actions/upload-artifact@v4
        with:
          name: screenshots-macos
          path: screenshots
      - name: branch name
        id: branch-name
        run: |
          echo "result=PR-$(cat PR)-${{ github.event.workflow_run.head_branch }}" >> $GITHUB_OUTPUT          
      - name: PR number
        id: pr-number
        run: |
          echo "result=$(cat PR)" >> $GITHUB_OUTPUT          

  compare-macos-screenshots:
    name: Compare macOS screenshots
    needs: [make-macos-screenshots-available]
    uses: ./.github/workflows/send-screenshots-to-pixeleagle.yml
    with:
      commit: ${{ github.event.workflow_run.head_sha }}
      branch: ${{ needs.make-macos-screenshots-available.outputs.branch-name }}
      artifact: screenshots-macos
      os: macos
    secrets: inherit

  comment-on-pr:
    name: Comment on PR
    runs-on: ubuntu-latest
    needs: [make-macos-screenshots-available, compare-macos-screenshots]
    if: ${{ always() && needs.compare-macos-screenshots.result == 'failure' }}
    steps:
      - uses: actions/checkout@v4
      - name: "Check if PR already has label"
        id: check-label
        env:
          PR: ${{ needs.make-macos-screenshots-available.outputs.pr-number }}
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          if [[ `gh api --jq '.labels.[].name' /repos/bevyengine/bevy/pulls/$PR` =~ "M-Deliberate-Rendering-Change" ]]
          then
            echo "result=true" >> $GITHUB_OUTPUT
          else
            echo "result=false" >> $GITHUB_OUTPUT
          fi          
      - name: "Check if last comment is already from actions"
        id: check-last-comment
        env:
          PR: ${{ needs.make-macos-screenshots-available.outputs.pr-number }}
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          if [[ `gh api --jq '.[-1].user.login' /repos/bevyengine/bevy/issues/$PR/comments` == 'github-actions[bot' ]]
          then
            echo "result=true" >> $GITHUB_OUTPUT
          else
            echo "result=false" >> $GITHUB_OUTPUT
          fi          
      - name: "Comment on PR"
        if: ${{ steps.check-label.outputs.result == 'false' && steps.check-last-comment.outputs.result == 'false' }}
        env:
          PROJECT: B04F67C0-C054-4A6F-92EC-F599FEC2FD1D
          PR: ${{ needs.make-macos-screenshots-available.outputs.pr-number }}
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          LF=$'\n'
          COMMENT_BODY="Your PR caused a change in the graphical output of an example or rendering test. This might be intentional, but it could also mean that something broke! ${LF}You can review it at https://pixel-eagle.com/project/$PROJECT?filter=PR-$PR ${LF} ${LF}If it's expected, please add the M-Deliberate-Rendering-Change label. ${LF} ${LF}If this change seems unrelated to your PR, you can consider updating your PR to target the latest main branch, either by rebasing or merging main into it."
          gh issue comment $PR --body "$COMMENT_BODY"