deploy.yml

name: Deploy

on:
  workflow_dispatch:

permissions:
  contents: read
  pull-requests: write

concurrency:
  group: deploy-pr
  cancel-in-progress: false

jobs:
  create-deploy-pr:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Create or update deploy PR
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -euo pipefail

          git fetch origin main beta

          if [ -z "$(git log --oneline origin/main..origin/beta)" ]; then
            echo "No commits to deploy from beta to main."
            exit 0
          fi

          compare_url="${{ github.server_url }}/${{ github.repository }}/compare/main...beta"
          recent_commits="$(git log --oneline --max-count=25 origin/main..origin/beta)"
          existing_pr="$(gh pr list --base main --head beta --state open --json number --jq '.[0].number')"
          body_file="$(mktemp)"

          {
            echo "## Summary"
            echo
            echo "Deploy the current \`beta\` branch to production by merging it into \`main\`."
            echo
            echo "Compare: ${compare_url}"
            echo
            echo "## Commits"
            echo
            echo "\`\`\`"
            echo "${recent_commits}"
            echo "\`\`\`"
          } > "${body_file}"

          if [ -n "${existing_pr}" ]; then
            gh pr edit "${existing_pr}" \
              --title "Deploy beta to production" \
              --body-file "${body_file}"
            echo "Updated existing deploy PR #${existing_pr}."
            exit 0
          fi

          gh pr create \
            --draft \
            --base main \
            --head beta \
            --title "Deploy beta to production" \
            --body-file "${body_file}"