name: Docker image build

on:
  push:
    tags:
      - 'v*'

defaults:
  run:
    shell: bash

env:
  DOCKER_REPO: lightninglabs
  DOCKER_IMAGE: lnd

jobs:
  main:
    runs-on: ubuntu-latest
    steps:
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_API_KEY }}

      - name: Set env
        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV

      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          push: true
          tags: "${{ env.DOCKER_REPO }}/${{ env.DOCKER_IMAGE }}:${{ env.RELEASE_VERSION }}"
          build-args: checkout=${{ env.RELEASE_VERSION }}

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}