name: Build docker base image

concurrency:
  group: base-${{ github.ref }}
  cancel-in-progress: true

## Update the base image every day
on:
  workflow_dispatch:
  schedule:
    ## In UTC
    - cron: '0 0 * * *'

## Build base images to be used by other github workflows
jobs:
  base-image:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/cache@v2
        with:
          path: /tmp/.docker-buildx-cache
          key: docker-buildx
      - uses: docker/setup-buildx-action@v1
      - uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ github.token }}
      - uses: docker/metadata-action@v3
        id: meta
        with:
          images: ghcr.io/${{ github.repository }}/base
          flavor: |
            latest=true
          tags: |
            type=ref,event=branch
            type=ref,event=tag
            type=semver,pattern={{version}}
      - name: Build base image
        uses: docker/build-push-action@v2
        with:
          push: true
          pull: true
          cache-from: type=local,src=/tmp/.docker-buildx-cache,mode=max
          cache-to: type=local,dest=/tmp/.docker-buildx-cache-new,mode=max
          platforms: linux/amd64
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          file: .github/dockerfile/Dockerfile
          context: .
      - name: Update cache
        run: |
          rm -rf /tmp/.docker-buildx-cache
          mv /tmp/.docker-buildx-cache-new /tmp/.docker-buildx-cache