name: Build Environment
on:
  push:
    branches-ignore:
      - master
      - 'feature/**'

jobs:

  build_environment:
    name: Check File Changes & Build Environment
    runs-on: ubuntu-18.04
    steps:
    - name: Checkout current branch
      uses: actions/checkout@v2
    - name: Check for file changes
      id: check_file_changes
      uses: trilom/file-changes-action@v1.2.4
    - name: Display file changes
      id: changed_files
      run: |
        export CHANGED_FILES='${{ steps.check_file_changes.outputs.files}}'
        echo "::set-output name=FILES_STATUS::$(bash ./scripts/check-file-matches.sh)"
    - name: Get current commit SHA
      id: get_sha
      run: echo "::set-output name=SHA_SHORT::$(git rev-parse --short HEAD)"
    - name: Build Docker image
      id: build_docker
      if: steps.changed_files.outputs.FILES_STATUS == 'Matched'
      env:
        DOCKER_USER: ${{ secrets.DOCKERHUB_USER }}
        DOCKER_PW: ${{ secrets.DOCKERHUB_PW }}
        COMMIT_SHA: ${{ steps.get_sha.outputs.SHA_SHORT }}
      run: |
        echo $DOCKER_PW | docker login -u $DOCKER_USER --password-stdin
        docker build . -t $DOCKER_USER/dvc-for-cd4ml:$COMMIT_SHA -f ./docker/dvc-for-cd4ml.Dockerfile
    - name: Push Docker image
      if: steps.build_docker.outcome == 'success'
      env:
        DOCKER_USER: ${{ secrets.DOCKERHUB_USER }}
        COMMIT_SHA: ${{ steps.get_sha.outputs.SHA_SHORT }}
      run: |
        echo "Pushing Docker image with new tag: $COMMIT_SHA"
        docker push $DOCKER_USER/dvc-for-cd4ml:$COMMIT_SHA