release.yml

name: Prepare releases
on:
  workflow_dispatch:
  push:
    branches:
      - main
    paths: 
      - packages/**

concurrency: ${{ github.workflow }}-${{ github.ref }}

jobs:
  
  changesets_release:
    name: Release
    runs-on: ubuntu-latest
    # Only runs in the main repo, not in forks
    if: github.repository == 'gfscott/eleventy-plugin-embed-everything'
    
    steps:
      - name: Checkout repo
        uses: actions/checkout@v3

      - name: Install pnpm
        uses: pnpm/action-setup@v2
        with:
          version: 8
      
      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: 20
          cache: 'pnpm'

      - name: Install dependencies
        run: pnpm install

      # Even though the CI workflow runs tests, run them here
      # so the release task errors out if there's a problem.
      - name: Run unit tests
        run: pnpm test

      # The Changesets action either updates its "Version packages" PR
      # OR publishes it to npm when that PR merges to main.
      - name: Create Release Pull Request or publish
        uses: changesets/action@v1
        with:
          # Calls 'release' script in root package.json
          # https://github.com/changesets/action#inputs
          publish: pnpm release
          commit: Version packages
          title: Version packages
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}


  sync_next:
    name: Sync next branch with main
    runs-on: ubuntu-latest
    needs: changesets_release
    if: github.repository == 'gfscott/eleventy-plugin-embed-everything'

    steps:
      - name: Checkout repo
        uses: actions/checkout@v3
      
      # Source: modified from a shopify/hydrogen workflow:
      # https://github.com/Shopify/hydrogen/blob/main/.github/workflows/sync_main.yml
      - name: Push to next branch
        run: |
          git show-ref
          git push origin HEAD:next --force

  
  changesets_prerelease:
    name: Prerelease packages
    runs-on: ubuntu-latest
    needs: sync_next
    if: github.repository == 'gfscott/eleventy-plugin-embed-everything'

    steps:
      - name: Checkout repo
        uses: actions/checkout@v3
        with:
          # Checkout the next branch, instead of the default main branch
          ref: next

      - name: Install pnpm
        uses: pnpm/action-setup@v2
        with:
          version: 8
      
      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: 20
          cache: 'pnpm'

      - name: Install dependencies
        run: pnpm install

      # By default, the changesets action creates an .npmrc file in each
      # package directory before publishing so npm has the registry and
      # token information it requires. Since this job requires entering
      # prerelease mode and making a commit in the project root,
      # the publish command fails because there is no .npmrc file and
      # the root package.json file is marked as private. Therefore,
      # this step creates that .npmrc file so the registry and token
      # information is available when running `changeset publish` in
      # the project's root directory context.
      # 
      # As I discovered through trial and error, you can’t just put a
      # static .npmrc file here because then it messes up other GitHub
      # Actions workflows.
      #
      # https://github.com/changesets/action#with-publishing
      - name: Creating .npmrc
        run: |
          cat << EOF > "$HOME/.npmrc"
            //registry.npmjs.org/:_authToken=$NPM_TOKEN
          EOF
        env:
          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

      # Following Changesets snapshot release procedures:
      # https://github.com/changesets/changesets/blob/main/docs/snapshot-releases.md
      # 
      # - Config values come from ./changeset/config.json
      #   - Version will be X.x.x-unstable-{commit_hash}
      # - Currently not pushing git tags to keep things moderately cleaner in the repo
      #
      - name: Enter snapshot mode and publish unstable versions to npm with changesets
        run: |
          pnpm changeset version --snapshot unstable
          pnpm changeset publish --no-git-tag --tag unstable
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}