name: Publish GHCR Image

on:
  push:
    tags:
      - "release-*"

permissions:
  contents: read
  packages: write

concurrency:
  group: publish-ghcr-${{ github.ref }}
  cancel-in-progress: false

jobs:
  publish:
    runs-on: ubuntu-latest

    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Set up Bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: 1.3.11

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

      - name: Run typecheck
        run: bun run typecheck

      - name: Run tests
        run: bun run test

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Derive image metadata
        shell: bash
        run: |
          set -euo pipefail

          version="${GITHUB_REF_NAME#release-}"
          version="${version#v}"

          if [[ -z "$version" ]]; then
            echo "Release version is empty after stripping prefix from tag: $GITHUB_REF_NAME" >&2
            exit 1
          fi

          image_name="ghcr.io/${GITHUB_REPOSITORY,,}"

          {
            echo "VERSION=$version"
            echo "IMAGE_NAME=$image_name"
          } >> "$GITHUB_ENV"

      - name: Build and push image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          push: true
          tags: |
            ${{ env.IMAGE_NAME }}:${{ env.VERSION }}
            ${{ env.IMAGE_NAME }}:latest
          labels: |
            org.opencontainers.image.source=https://github.com/${{ github.repository }}
            org.opencontainers.image.revision=${{ github.sha }}
            org.opencontainers.image.version=${{ env.VERSION }}