name: "Setup Docker"

inputs:
  username:
    description: "Username"
    required: true
  password:
    description: "Password"
    required: true
  ghcr_username:
    description: "GHCR username. Usually set from the github.actor variable"
    required: true
  ghcr_password:
    description: "GHCR password. Usually set from the secrets.GITHUB_TOKEN variable"
    required: true

outputs:
  sha_short:
    description: "The short SHA used for image builds"
    value: ${{ steps.vars.outputs.sha_short }}

runs:
  using: "composite"
  steps:
    - name: Get Short SHA
      id: vars
      run: |
        echo ::set-output name=sha_short::${GITHUB_SHA::7}
      shell: bash

    - name: Set up QEMU
      uses: docker/setup-qemu-action@v2

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

    - name: Login to DockerHub
      if: ${{ github.event_name == 'release' || github.event_name == 'push' && github.ref == 'refs/heads/master' }}
      uses: docker/login-action@v2
      with:
        username: ${{ inputs.username }}
        password: ${{ inputs.password }}

    - name: Login to GitHub Container Registry
      if: ${{ github.event_name == 'release' || github.event_name == 'push' && github.ref == 'refs/heads/master' }}
      uses: docker/login-action@v2
      with:
        registry: ghcr.io
        username: ${{ inputs.ghcr_username }}
        password: ${{ inputs.ghcr_password }}