newsletter.yml

name: "Publish newsletter"
on:
  schedule:
    - cron: "0 16 * * 5"

jobs:
  newsletter:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Trigger Netlify build (to ensure remote images are hosted)
        run: curl -X POST -d {} ${{ secrets.NETLIFY_NIGHTLY_WEBHOOK }}

      - name: Setup Hugo
        uses: peaceiris/actions-hugo@v2
        with:
          hugo-version: "0.96.0"
          extended: true

      - name: Build site
        run: hugo

      - name: Send newsletter
        run: |
          if [ -f public/newsletter/$(date +%F)-*/email.html ]; then
              SUBJECT=$(grep -oE "<title>.*</title>" public/newsletter/$(date +%F)-*/email.html | sed "s/<title>//" | sed "s/<\/title>//")
              cat public/newsletter/$(date +%F)-*/email.html | curl -s --user 'api:${{ secrets.MAILGUN_API_KEY }}' \
                  https://api.eu.mailgun.net/v3/tomlinson.email/messages \
                  -F from='Jacob Tomlinson (newsletter) <jacob+newsletter@tomlinson.email>' \
                  -F to=newsletter@tomlinson.email \
                  -F subject="$SUBJECT" \
                  -F html='<-'
          fi