name: Change Latest Docker Image
on: 
  workflow_dispatch:
    inputs:
      docker_commit_tag:
        description: 'Docker image tag to be set as latest'
        required: true

jobs:

  retag_latest:
    name: Tag Latest Relevant Image
    runs-on: ubuntu-18.04
    steps:
    - name: Retag chosen image with latest
      env:
        CHOSEN_DOCKER_TAG: ${{ github.event.inputs.docker_commit_tag }}
        DOCKER_USER: ${{ secrets.DOCKERHUB_USER }}
        DOCKER_PW: ${{ secrets.DOCKERHUB_PW }}
      run: |
        echo $DOCKER_PW | docker login -u $DOCKER_USER --password-stdin
        docker pull $DOCKER_USER/dvc-for-cd4ml:$CHOSEN_DOCKER_TAG
        docker image tag $DOCKER_USER/dvc-for-cd4ml:$CHOSEN_DOCKER_TAG $DOCKER_USER/dvc-for-cd4ml:latest
        docker push $DOCKER_USER/dvc-for-cd4ml:latest