name: 'Dockerfile test build'
description: 'Test build of Dockerfile'

inputs:
  buildkit_version:
    description: 'Buildkit version'
    required: true
  context:
    description: 'Build context'
    required: true
    default: '.'
  dockerfile:
    description: 'Dockerfile name'
    required: true
    default: '.'

runs:
  using: "composite"
  steps:
    - name: Prepare buildkit directory
      shell: bash
      run: mkdir -p /var/lib/buildkit

    - name: Download buildkit binaries
      shell: bash
      run: |
        [ -f /var/lib/buildkit/buildkit.tar.gz ] || \
          curl --output /var/lib/buildkit/buildkit.tar.gz \
          "https://github.com/moby/buildkit/releases/download/${{ inputs.buildkit_version }}/buildkit-${{ inputs.buildkit_version }}.linux-amd64.tar.gz"

    - name: Extract buildkit binaries
      shell: bash
      run: |
        [ -x /var/lib/buildkit/bin/buildkitd ] && \
        [ -x /var/lib/buildkit/bin/buildctl ] || \
        tar -xf /var/lib/buildkit/buildkit.tar.gz -C /var/lib/buildkit

    - name: Run buildkit build
      shell: bash
      run: |
        /var/lib/buildkit/bin/buildkitd & \
        while [ ! -S /run/buildkit/buildkitd.sock ]; do sleep 0.1; done && \
        /var/lib/buildkit/bin/buildctl build \
            --frontend=dockerfile.v0 \
            --local context=${{ inputs.context }} \
            --local dockerfile=${{ inputs.dockerfile }}