astro/.github/workflows/main.yml

name: Main Checks

on:
  push:
    branches:
      - main

env:
  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

# Automatically cancel in-progress actions on the same branch
concurrency:
  group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && github.head_ref || github.ref }}
  cancel-in-progress: true

jobs:
  congrats:
    name: congratsbot
    if: ${{ github.repository_owner == 'withastro' }}
    runs-on: ubuntu-latest
    steps:
      - id: setup
        env:
          MESSAGE: ${{ github.event.commits[0].message }}
        run:  |
              TRIMMED=$(echo "$MESSAGE" | sed '1!d;q')
              echo "::set-output name=COMMIT_MSG::${TRIMMED}" 
      - name: Send a Discord notification when a PR is merged
        env:
          DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK_CONGRATS }}
          # DISCORD_AVATAR: ${{ github.event.pull_request.user.avatar_url }}
        uses: Ilshidur/action-discord@0.3.2
        with:
          args: "**Merged!** ${{ github.event.commits[0].author.name }}: [`${{ steps.setup.outputs.COMMIT_MSG }}`](<https://github.com/withastro/astro/commits/main>)"

  check_for_update:
    name: Check for Updates
    runs-on: ubuntu-latest
    outputs:
      run_job: ${{ steps.check_files.outputs.run_job }}
    steps:
      - uses: actions/checkout@v2

      - name: Setup Node
        uses: actions/setup-node@v2
        with:
          node-version: 16
          cache: 'yarn'

      - name: Install NPM Dependencies
        if: steps.cache-npm.outputs.cache-hit != 'true'
        run: yarn install --prefer-offline --frozen-lockfile --ignore-engines --registry https://registry.npmjs.org --network-timeout 300000
        env:
          CI: true
      
      - name: Check Modified
        run: yarn changeset status --output ./status.json

      - name: Check Output
        id: check_files
        run: | 
          output=`echo $(cat status.json)`
          if [[ $output = '{ "changesets": [], "releases": [] }' ]]
          then
            echo 'No changeset found'
            echo "::set-output name=run_job::true"
          else
            echo 'changes found, push to latest skipped'
            echo "::set-output name=run_job::false"
          fi
  
  update:
    name: Update the latest branch
    needs: check_for_update
    if: needs.check_for_update.outputs.run_job == 'true'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Push
        uses: ad-m/github-push-action@master
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          branch: latest