logto/.github/workflows/update-pr-metadata.yml

name: Update Metadata

on:
  issues:
    types: [opened, edited, reopened]
  pull_request:
    types: [opened, edited, synchronize, reopened]

jobs:
  update-metadata:
    runs-on: ubuntu-latest
    steps:
      - name: Add labels
        uses: silverhand-io/actions-add-labels-run-steps@v1.1.2
        with:
          title: ${{ github.event.pull_request.title || github.event.issue.title }}
          github-token: ${{ github.token }}

      - name: Add assignees
        if: ${{ github.event_name == 'pull_request' }}
        uses: actions-ecosystem/action-add-assignees@v1
        with:
          github_token: ${{ github.token }}
          assignees: ${{ github.actor }}

  pr-size-diff:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Prepare
        run: |
          git checkout master
          git checkout -
          curl -fsSLO https://gist.githubusercontent.com/gao-sun/88dac6c38e86f4ae12c8a7c3e777040a/raw/c50d06a4f9b89a7bc9bad580ae96a5fc0db3e24f/git-file-size-diff.sh
          chmod +x git-file-size-diff.sh
      
      - name: Calc Size Diff
        id: size-diff
        run: echo "::set-output name=diff::$(./git-file-size-diff.sh --cached master)"

      - uses: actions/github-script@v6
        id: message
        with:
          result-encoding: string
          script: |
            const diff = ${{ steps.size-diff.outputs.diff }};

            // https://stackoverflow.com/a/18650828/12514940
            function formatBytes(bytes, decimals = 2) {
              if (bytes === 0) return '0 Bytes';

              const k = 1024;
              const dm = decimals < 0 ? 0 : decimals;
              const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];

              const i = Math.floor(Math.log(bytes) / Math.log(k));

              return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
            }

            function getPrefix(bytes) {
              if (bytes === 0) {
                return '';
              }

              return diff > 0 ? ':chart_with_upwards_trend: +' : ':chart_with_downwards_trend: -';
            }

            return `**Size Diff (compare to \`master\`)** ${
              diff > 1024 * 5 ? ':warning: ' : ''
            }${
              getPrefix(diff)
            }${formatBytes(Math.abs(diff))}`;
      
      - uses: marocchino/sticky-pull-request-comment@v2
        with:
          message: |
            ${{ steps.message.outputs.result }}