name: Publish Release

on:
  pull_request:
    types: [closed]

jobs:
  publish-release:
    permissions:
      contents: write
    if: |
      github.event.pull_request.merged == true &&
      startsWith(github.event.pull_request.head.ref, 'release/')
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          # We check out the release pull request's base branch, which will be
          # used as the base branch for all git operations.
          ref: ${{ github.event.pull_request.base.ref }}
      - name: Get Node.js version
        id: nvm
        run: echo ::set-output name=NODE_VERSION::$(cat .nvmrc)
      - uses: actions/setup-node@v2
        with:
          node-version: ${{ steps.nvm.outputs.NODE_VERSION }}
      - uses: MetaMask/action-publish-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}