prepare-beta.yml

name: Prepare Beta Release

on:
  workflow_dispatch:
    inputs:
      version:
        description: Stable SemVer series, for example 0.1.0
        required: true
        type: string

concurrency:
  group: prepare-beta-${{ inputs.version }}
  cancel-in-progress: false

jobs:
  prepare:
    if: github.ref_name == 'main'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
        with:
          fetch-depth: 0

      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
        with:
          bun-version: "1.3.5"

      - name: Validate requested version
        env:
          VERSION: ${{ inputs.version }}
        run: |
          if ! [[ "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "::error::version must be a stable SemVer such as 0.1.0"
            exit 1
          fi

      - name: Prepare isolated beta branch
        env:
          VERSION: ${{ inputs.version }}
        run: |
          branch="release/${VERSION}-beta"
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git fetch origin main
          if git ls-remote --exit-code --heads origin "${branch}" >/dev/null 2>&1; then
            git fetch origin "${branch}"
            git checkout --branch "${branch}" --track "origin/${branch}"
            git merge --no-edit origin/main
          else
            git checkout --branch "${branch}" origin/main
            bunx changeset pre enter beta
          fi

      - name: Install dependencies
        run: bun install --frozen-lockfile

      - name: Calculate next beta version
        run: bun run release:version

      - name: Validate calculated beta version
        id: release
        run: >-
          bun run scripts/release/channel.ts validate
          --channel beta
          --ref "release/${{ inputs.version }}-beta"
          --expected "${{ inputs.version }}"
          --output "$GITHUB_OUTPUT"

      - name: Commit and push beta branch
        env:
          VERSION: ${{ steps.release.outputs.version }}
        run: |
          if git diff --quiet && git diff --cached --quiet; then
            echo "::error::No unreleased changesets are available for the next beta."
            exit 1
          fi
          git add --all
          git commit --message "chore: prepare ${VERSION}"
          git push origin HEAD