name: Docker Build and Push
description: Extract metadata, build and push Docker image to git.sebse.de

inputs:
  image:
    description: Full image name, e.g. git.sebse.de/sebse/my-app
    required: true
  build-context:
    description: Docker build context path
    required: true
  dockerfile:
    description: Path to Dockerfile (optional)
    required: false
    default: ""

runs:
  using: composite
  steps:
    - name: Extract metadata
      id: meta
      uses: docker/metadata-action@v5
      with:
        images: ${{ inputs.image }}
        tags: |
          type=sha,prefix=,format=short
          type=raw,value=latest

    - name: Setup Buildx
      uses: docker/setup-buildx-action@v3

    - name: Build and push
      uses: docker/build-push-action@v5
      with:
        context: ${{ inputs.build-context }}
        file: ${{ inputs.dockerfile != '' && inputs.dockerfile || format('{0}/Dockerfile', inputs.build-context) }}
        push: true
        tags: ${{ steps.meta.outputs.tags }}
        labels: ${{ steps.meta.outputs.labels }}
        cache-from: type=registry,ref=${{ inputs.image }}:latest
        cache-to: type=inline