github-actions-slack.yml

on:
  release:
    types: [published]

jobs:
  slack:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Get the two most recent tags
        run: |
          TAGS=$(git tag --sort=-creatordate | head -n 2)
          if [ "$(echo "$TAGS" | wc -l)" -lt 2 ]; then
            echo "Insufficient tags to calculate diff."
            exit 1
          fi
          TAG_OLD=$(echo "$TAGS" | tail -n 1)
          TAG_NEW=$(echo "$TAGS" | head -n 1)
          echo "tag_old=$TAG_OLD" >> $GITHUB_ENV
          echo "tag_new=$TAG_NEW" >> $GITHUB_ENV
      - name: Generate git diff
        run: |
          git diff --unified=0 ${{env.tag_old}} ${{env.tag_new}} src/igvfd/schemas/changelogs/* | grep -v ^--- | grep -E "^[\+|#| #|-]"> diff.txt
      - name: Prepare the Slack message
        run: |
          python scripts/slack/generate_payload.py --diff-file diff.txt --output-file slack_payload.json --tag-old ${{env.tag_old}} --tag-new ${{env.tag_new}} --channel-id ${{secrets.SUBMITTER_HELPDESK_CHANNEL_ID}}
      - name: Post a message to Slack
        uses: slackapi/slack-github-action@v2.0.0
        with:
          method: chat.postMessage
          token: ${{secrets.SUBMITTER_HELPDESK_SLACK_BOT_TOKEN}}
          payload-file-path: slack_payload.json