prerelease.yml

name: Prerelease

on:
  push:
    branches:
      # Target release-x.x branches
      - "release-*"

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

jobs:
  prerelease:
    name: Changesets Prerelease
    # Prevents changesets action from creating a PR on forks
    if: github.repository == 'apollographql/apollo-client'
    runs-on: ubuntu-latest
    # Permissions necessary for Changesets to push a new branch and open PRs
    # (for automated Version Packages PRs), and request the JWT for provenance.
    # More info: https://docs.github.com/en/actions/deployment/security-hardening-your-deployments/about-security-hardening-with-openid-connect#adding-permissions-settings
    permissions:
      contents: write
      pull-requests: write
      id-token: write
    steps:
      - uses: actions/create-github-app-token@v1
        id: github-actions-bot-app-token
        with:
          app-id: 819772
          private-key: ${{ secrets.APOLLO_GITHUB_ACTIONS_BOT_PRIVATE_KEY }}

      # Check out the repository, using the Github Actions Bot app's token so
      # that we can push later.
      - name: Checkout repo
        uses: actions/checkout@v4
        with:
          token: ${{ steps.github-actions-bot-app-token.outputs.token }}
          # Fetch entire git history so  Changesets can generate changelogs
          # with the correct commits
          fetch-depth: 0

      - name: Append NPM token to .npmrc
        run: |
          cat << EOF > "$HOME/.npmrc"
            provenance=true
            //registry.npmjs.org/:_authToken=$NPM_TOKEN
          EOF
        env:
          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

      - name: Setup Node.js 20.x
        uses: actions/setup-node@v4
        with:
          node-version: 20.x

      - name: Install dependencies with cache
        uses: bahmutov/npm-install@v1

      - name: Check for pre.json file existence
        id: check_files
        uses: andstor/file-existence-action@v3.0.0
        with:
          files: ".changeset/pre.json"

      - name: Enter prerelease mode (alpha by default)
        # If .changeset/pre.json does not exist and we did not recently exit
        # prerelease mode, enter prerelease mode with tag alpha
        if: steps.check_files.outputs.files_exists == 'false' && !contains(github.event.head_commit.message, 'Exit prerelease')
        run: |
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git config user.name "github-actions[bot]"
          npx changeset pre enter alpha
          git add -A
          git commit -m 'Enter prerelease mode'
          git push

      - name: Get prerelease changesets
        id: prerelease-changesets
        uses: notiz-dev/github-action-json-property@release
        with:
          path: ".changeset/pre.json"
          prop_path: "changesets"

      - name: Get changesets array length
        id: number-of-changesets
        run: |
          arrayLength=$(echo '${{steps.prerelease-changesets.outputs.prop}}' | jq '. | length')
          echo "length=$arrayLength" >> "$GITHUB_OUTPUT"

      - name: Create prerelease PR
        # Only attempt to create a PR if:
        # 1. .changeset/pre.json exists
        # 2. we are not actively publishing after merging a Version Packages PR
        # 3. AND we have prerelease changesets to publish (otherwise it errors)
        if: steps.check_files.outputs.files_exists == 'true' && !startsWith(github.event.head_commit.message, 'Version Packages') && steps.number-of-changesets.outputs.length > 0
        uses: changesets/action@v1
        with:
          version: npm run changeset-version
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Publish to npm + GitHub
        id: changesets
        # Only publish if we're still in pre mode and the last commit was
        # from an automatically created Version Packages PR
        if: steps.check_files.outputs.files_exists == 'true' && startsWith(github.event.head_commit.message, 'Version Packages')
        uses: changesets/action@v1
        with:
          version: echo "This step should never version"
          publish: npm run changeset-publish # by default, this will publish to npm and GitHub
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

      - name: Tag release with next on npm
        if: steps.changesets.outcome == 'success'
        run: npm dist-tag add @apollo/client@${{ fromJson(steps.changesets.outputs.publishedPackages)[0].version }} next

      - name: Send a Slack notification on publish
        if: steps.changesets.outcome == 'success'
        id: slack
        uses: slackapi/slack-github-action@v1.25.0
        with:
          # Slack channel id, channel name, or user id to post message
          # See also: https://api.slack.com/methods/chat.postMessage#channels
          # You can pass in multiple channels to post to by providing
          # a comma-delimited list of channel IDs
          channel-id: "C01PS0CB41G"
          payload: |
            {
              "blocks": [
                {
                  "type": "section",
                  "text": {
                    "type": "mrkdwn",
                    "text": "A new version of `@apollo/client` was released: <https://github.com/apollographql/apollo-client/releases/tag/v${{ fromJson(steps.changesets.outputs.publishedPackages)[0].version }}|v${{ fromJson(steps.changesets.outputs.publishedPackages)[0].version }}> :rocket:"
                  }
                }
              ]
            }
        env:
          SLACK_BOT_TOKEN: ${{ secrets.SLACK_BOT_TOKEN }}