name: release

on:
  push:
    tags:
      - "v*"

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Check out repo
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Cache Docker layers
        uses: actions/cache@v3
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: Login to GHCR Docker registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set outputs
        run: |
          echo "RELEASE_TAG=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV \
          && echo "RELEASE_SHORT_COMMIT=$(git rev-parse --short HEAD)" >> $GITHUB_ENV

      - name: Build and push image
        uses: docker/build-push-action@v2
        with:
          context: ./
          file: ./Dockerfile
          platforms:
            - linux/amd64
            - linux/arm64
          push: true
          build-args: |
            BUILD=${{ env.RELEASE_SHORT_COMMIT }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache
          tags: |
            ghcr.io/grassrootseconomics/urdt-ussd:latest
            ghcr.io/grassrootseconomics/urdt-ussd:${{ env.RELEASE_TAG }}