deploy.yml

name: Build and deploy

on:
    # Allows you to run this workflow manually from the Actions tab
    workflow_dispatch:

    push:
        paths:
            - 'src/**/*'
            - '_config.ts'
            - 'CNAME'
            - '.rebuild'
            - '.github/workflows/deploy.yml'

# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
permissions:
    contents: write # to checkout repo and write back log file
    pages: write # to deploy to Pages
    id-token: write # to verify the deployment originates from an appropriate source

# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
concurrency:
    group: 'pages'
    cancel-in-progress: false

env:
    DENO_VERSION: v1.42.4
    BUILD_FOLDER: build
    MASTODON_LOG_FILE: .mastodon-notes
    MASTODON_TODO: .mastodon-todo.json
    NOTES_DIR: src/notes

jobs:
    build:
        name: Build
        runs-on: ubuntu-latest
        steps:
            - name: Checkout code
              uses: actions/checkout@v4

            - name: Setup Deno
              uses: denoland/setup-deno@v1
              with:
                  deno-version: ${{ env.DENO_VERSION }}

            - name: Build site
              run: deno task build
              env:
                  NODE_ENV: production
                  ENV: production

            - name: Upload site
              uses: actions/upload-pages-artifact@v3
              with:
                  path: ${{ env.BUILD_FOLDER }}
                  
            - name: Upload Mastodon todo
              uses: actions/upload-artifact@v4
              with:
                  name: mastodon-todo
                  path: ${{ env.MASTODON_TODO }}
                  include-hidden-files: true
                  overwrite: true

    deploy:
        name: Deploy
        needs: build
        runs-on: ubuntu-latest
        if: github.ref_name == 'main'
        environment:
            name: github-pages
            url: ${{ steps.deployment.outputs.page_url }}
        steps:
            - name: Deploy to GitHub Pages
              id: deployment
              uses: actions/deploy-pages@v4

            - name: Purge Cloudflare cache
              uses: jakejarvis/cloudflare-purge-action@master
              env:
                  CLOUDFLARE_ZONE: ${{ secrets.CLOUDFLARE_ZONE }}
                  CLOUDFLARE_TOKEN: ${{ secrets.CLOUDFLARE_TOKEN }}

    # This task exists just so we can short circuit and quit early in post_mastodon
    check_latest_note:
        name: Check Mastodon todo
        needs: build
        runs-on: ubuntu-latest
        outputs:
            do_post: ${{ steps.todo_file.outputs.do_post }}
        steps:
            - name: Download Mastodon todo
              uses: actions/download-artifact@v4
              continue-on-error: true
              with:
                  name: mastodon-todo

            - name: Check if we have something to do
              id: todo_file
              timeout-minutes: 10
              run: |
                  [ -f "$file" ] && echo "do_post=true" >> "$GITHUB_OUTPUT" || echo "Nothing to do"
              env:
                  file: ${{ env.MASTODON_TODO }}

    post_mastodon:
        name: Post to Mastodon
        # can't send post with permalink until site is deployed
        needs: [deploy, check_latest_note]
        runs-on: ubuntu-latest
        # If nothing to do, we can just skip this whole task
        if: needs.check_latest_note.outputs.do_post == 'true'
        steps:
            - name: Checkout code
              uses: actions/checkout@v4
              
            - name: Download Mastodon todo
              uses: actions/download-artifact@v4
              continue-on-error: true
              with:
                  name: mastodon-todo

            - name: Setup Deno
              uses: denoland/setup-deno@v1
              with:
                  deno-version: ${{ env.DENO_VERSION }}

            - name: Wait for site to deploy
              timeout-minutes: 5
              run: ./script/wait-for-status.sh --latest

            - name: Post to Mastodon API
              run: deno run --allow-net --allow-read --allow-write --allow-env script/post-mastodon.ts
              env:
                  MASTODON_ACCESS_TOKEN: ${{ secrets.MASTODON_ACCESS_TOKEN }}

            - name: Write to log
              run: |
                  id=$(cat $todo_file | jq -r ".id")
                  echo $id >> $log_file
                  cat $log_file
              env:
                  todo_file: ${{ env.MASTODON_TODO }}
                  log_file: ${{ env.MASTODON_LOG_FILE }}

            - name: Commit and push changed files
              # Pull first, since something could've been pushed in-between.
              run: |
                  git pull
                  git config user.name "Automated"
                  git config user.email "actions@users.noreply.github.com"
                  # The note that was posted now as an "url" in the frontmatter
                  git add $log_file $dir
                  timestamp=$(date -u)
                  git commit -m "Latest post to Mastodon: $timestamp [skip-ci]" || exit 0
                  git push
              env:
                  log_file: ${{ env.MASTODON_LOG_FILE }}
                  dir: ${{ env.NOTES_DIR }}