GitHub Composite Action for deploying to pantheon

actions\setup-runner\action.yml

name: "Setup Runner"
description: "Provides SSH, PHP, Terminus as a composite action"

inputs:
  pantheon_ssh_key:
    description: 'Pantheon SSH Private key in the PEM format.'
    required: true
  ssh_config:
    description: 'Contents of the ssh/config file.'
    required: true
  pantheon_machine_token:
    description: 'Pantheon Machine Token for Terminus.'
    required: true
  known_hosts:
    description: 'Known hosts file contents. Defaults to single blank space.'
    required: true
    default: ' '
  php_version:
    description: 'PHP version'
    required: true
    default: '7.3'
  composer_version:
    description: 'Composer version'
    required: true
    default: 'v2'
  node_version:
    description: 'Node.js version'
    required: true
    default: '10.x'
  terminus_version:
    description: 'Terminus version number in composer dependency format.'
    required: true
    default: '^2.0'
  terminus_build_tools_version:
    description: 'Terminus build tools version number in composer dependency format.'
    required: true
    default: '^2.0'

runs:
  using: "composite"
  steps:
    - name: Setup SSH
      uses: shimataro/ssh-key-action@v2
      with:
        key: ${{ inputs.pantheon_ssh_key }}
        config: ${{ inputs.ssh_config }}
        known_hosts: ${{ inputs.known_hosts }}

    - name: Setup Node
      uses: actions/setup-node@v1
      with:
        node-version: ${{ inputs.node_version }}

    - name: Setup PHP
      uses: shivammathur/setup-php@master
      with:
        php-version: ${{ inputs.php_version }}
        extensions: gd
        tools: composer:${{ inputs.composer_version }}

    # Composer caching.
    - name: Get Composer Cache Directory
      id: composer-cache
      shell: bash
      run: |
        echo "::set-output name=dir::$(composer config cache-files-dir)"

    - name: Utilize Composer Cache Directory
      uses: actions/cache@v2
      with:
        path: ${{ steps.composer-cache.outputs.dir }}
        key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
        restore-keys: |
          ${{ runner.os }}-composer-

    # Terminus setup and test.
    - name: Installing Terminus
      shell: bash
      run: |
        composer global require pantheon-systems/terminus:${{ inputs.terminus_version }}
        terminus auth:login --machine-token=${{ inputs.pantheon_machine_token }}

    - name: Install Terminus build tools
      shell: bash
      if: success()
      run: |
        mkdir -p ~/.terminus/plugins
        composer create-project --no-dev -d ~/.terminus/plugins pantheon-systems/terminus-build-tools-plugin:${{ inputs.terminus_build_tools_version }}

    - name: Terminus - Listing Sites
      shell: bash
      if: success()
      run: terminus site:list

workflows\deploy-to-pantheon.yml

## https://medium.com/swlh/pantheon-and-github-actions-automated-deployments-via-github-actions-c245aa954797
name: Deploy to Pantheon
on:
  push:
    branches:
      - 'master'
jobs:
  build:
    name: Build and push to Pantheon
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - id: setup-runner
        name: Setup Runner
        uses: ./.github/actions/setup-runner
        with:
          pantheon_ssh_key: ${{ secrets.PANTHEON_SSH_KEY }}
          ssh_config: ${{ secrets.SSH_CONFIG }}
          pantheon_machine_token: ${{ secrets.PANTHEON_MACHINE_TOKEN }}
          php_version: '7.3'
          composer_version: 'v1'
          terminus_version: '^2.0'
          node_version: '10.x'

      - name: Composer Install Dependencies
        run: composer install --optimize-autoloader --no-dev --prefer-dist --no-progress --no-suggest

      ## Build Theme
      - name: Build Theme Artifacts
        run: |
          cd web/themes/custom/<my theme here>
          npm install

      ## Prepare for Pantheon
      - name: Prepare for Pantheon
        run: |
          cp .gitignore.pantheon .gitignore
          find ./web -type d -name ".git" | xargs rm -fr

      ## Deploy
      - name: Deploy to Pantheon
        env:
          pantheon_site: '<pantheon site name here>'
          pantheon_env: 'dev'
        run: |
          commit_message=$(git log -1 --pretty=%B)
          git config user.name "$(git --no-pager log --format=format:'%an' -n 1)"
          git config user.email "$(git --no-pager log --format=format:'%ae' -n 1)"
          terminus build:env:push $pantheon_site.$pantheon_env --message="${{ github.actor }}: CI Deployment for: $commit_message"

      ## Terminus
      - name: Terminus Drush Updates
        env:
          pantheon_site: '<pantheon site name here>'
          pantheon_env: 'dev'
        run: |
          terminus -n drush $pantheon_site.$pantheon_env -- deploy -y
          terminus -n env:clear-cache $pantheon_site.$pantheon_env

Example of reusable composite custom action, and a workflow that uses it.

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