Github Actions x Slack で始める DevOps 集（放置されてる PR 通知など）

name: Notify Unreviewed PRs

on:
  schedule:
    # Runs every weekday (Mon-Fri) at 9:00 JTC
    - cron: '0 0 * * 1-5'

jobs:
  notify:
    runs-on: ubuntu-latest
    steps:
      - name: Make unreviewed PRs message
        id: make_message
        uses: actions/github-script@v6
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const { data: pullRequests } = await github.rest.pulls.list({
              owner: context.repo.owner,
              repo: context.repo.repo,
              state: 'open'
            });

            const unreviewedPRs = [];
            const currentDate = new Date();
            for (const pr of pullRequests) {
            　const createdDate = new Date(pr.created_at);
              const elapsedTimeInHours = (currentDate - createdDate) / 1000 / 60 / 60;　
              if (elapsedTimeInHours < 24 || pr.draft) {
                continue;
              }　
            
              const { data: reviews } = await github.rest.pulls.listReviews({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: pr.number
              });
            
              if (reviews.length === 0) {
                unreviewedPRs.push(pr);
              }
            }
            
            if (unreviewedPRs.length === 0) {
              return "放置されている PR はありません！:+1:";
            } 
            
            const links = unreviewedPRs.map(pr => `■ <${pr.html_url}|${pr.title}>`);
            return [
              ":rotating_light:*以下のPRが1日以上レビューされていません*:rotating_light:\n",
              ...links
            ].join('\n');
      - name: Posting to Slack
        id: slack
        uses: slackapi/slack-github-action@v1.23.0
        with:
          payload: |
            {
              "text": ${{ steps.make_message.outputs.result }},
              "blocks": [
                {
                  "type": "section",
                  "text": {
                    "type": "mrkdwn",
                    "text": ${{ steps.make_message.outputs.result }}
                  }
                }
              ]
            }
        env:
          SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_INCOMING_WEBHOOK_URL }}