name: Build and release docker images
on:
  push:
    paths-ignore:
      - '**.md'
      - 'Makefile'
      - 'config.json'
    branches:
      - 'master'
    tags:
      - '*'

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          submodules: true

      - name: Get the tag name
        run: echo "TAG=${GITHUB_REF/refs\/tags\//}" >> $GITHUB_ENV

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1

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

      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

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

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

      - name: Lower case for ghcr
        id: ghcr_string
        uses: ASzc/change-string-case-action@v1
        with:
          string: ${{ github.event.repository.full_name }}

      - name: Build and push latest images
        if: ${{ github.ref == 'refs/heads/master' }}
        uses: docker/build-push-action@v2
        with:
          context: .
          platforms: linux/arm,linux/amd64,linux/arm64
          push: true
          tags: |
            webpsh/webp_server_go
            webpsh/webp-server-go
            webpsh/webps
            ghcr.io/${{ steps.ghcr_string.outputs.lowercase }}

          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max

      - name: Build and push tagged images
        if: ${{ github.ref != 'refs/heads/master' }}
        uses: docker/build-push-action@v2
        with:
          context: .
          platforms: linux/arm,linux/amd64,linux/arm64
          push: true
          tags: |
            webpsh/webp_server_go:${{ env.TAG }}
            webpsh/webp-server-go:${{ env.TAG }}
            webpsh/webps:${{ env.TAG }}
            ghcr.io/${{ steps.ghcr_string.outputs.lowercase }}:${{ env.TAG }}

          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max

      - name: Move cache
        run: |
          rm -rf /tmp/.buildx-cache
          mv /tmp/.buildx-cache-new /tmp/.buildx-cache