comment_on_pr.yaml

---
name: Comment output on PR

on:
  workflow_run:
    workflows: ["Vanagon Component Diff"]
    types:
      - completed

jobs:
  upload:
    runs-on: ubuntu-latest
    if: ${{ github.event.workflow_run.conclusion == 'success' }}
    steps:
      - name: 'Download artifacts'
        uses: actions/github-script@v3.1.0
        with:
          script: |
            var artifacts = await github.actions.listWorkflowRunArtifacts({
               owner: context.repo.owner,
               repo: context.repo.repo,
               run_id: ${{github.event.workflow_run.id }},
            });
            var matchArtifact = artifacts.data.artifacts.filter((artifact) => {
              return artifact.name == "artifacts"
            })[0];
            var download = await github.actions.downloadArtifact({
               owner: context.repo.owner,
               repo: context.repo.repo,
               artifact_id: matchArtifact.id,
               archive_format: 'zip',
            });
            var fs = require('fs');
            fs.writeFileSync('${{github.workspace}}/artifacts.zip', Buffer.from(download.data));
            fs.writeFileSync('./artifactid', matchArtifact.id)

      - name: 'Unzip artifacts'      
        run: unzip artifacts.zip

      - name: 'Check comment limits'
        run: |
          chars=$(cat ./text | wc -m)
          if ((chars > 65300)); then
            # Trim output to 65300 characters
            truncate -s 65300 ./text

            # Close all code blocks
            nr_code_keyword=$(cat ./text | grep '\`\`\`' | wc -l)
            if [ $((nr_code_keyword%2)) -ne 0 ];then
              echo >> ./text
              echo "\`\`\`" >> ./text
            fi

            # Close all collapsible blocks
            nr_open_details=$(cat ./text | grep '<details>' | wc -l)
            nr_closed_details=$(cat ./text | grep '</details>' | wc -l)
            for i in `seq $(($nr_open_details-$nr_closed_details))`; do echo >> ./text; echo "</details>" >> ./text;done

            # Output artifact info
            echo >> ./text
            echo "# ..." >> ./text
            echo >> ./text
            printf "Comment size limit reached. " >> ./text
            echo "Please download full artifacts from [here](https://github.com/${{ github.repository }}/suites/${{github.event.workflow_run.check_suite_id }}/artifacts/$(cat ./artifactid))." >> ./text
          fi

      - name: 'Add comment'
        uses: actions/github-script@v3
        with:
          script: |
            var fs = require('fs');
            var issue_number = Number(fs.readFileSync('./nr'));
            var issue_text = String(fs.readFileSync('./text'));
            await github.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: issue_number,
              body: issue_text
            });