name: Deploy site on release

# Cloudflare Workers Builds deploys the site from the `release` branch.
# Publishing a GitHub release moves `release` to the released tag.

on:
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      tag:
        description: Tag to deploy (for example 1.1.0)
        required: true
        type: string

permissions:
  contents: write

jobs:
  move-release-branch:
    runs-on: ubuntu-latest
    if: github.event_name == 'workflow_dispatch' || github.event.release.prerelease == false
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Point release branch at tag
        env:
          TAG: ${{ inputs.tag || github.event.release.tag_name }}
        run: |
          SHA=$(git rev-parse "refs/tags/$TAG^{commit}")
          git push --force origin "$SHA:refs/heads/release"