docker.yml

name: build-docker-from-scratch-unconditionally

on:
  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:
    inputs:
      imageTag:
        description: "The tag to be used for the images"
        required: true
        default: "latest"

env:
  IMAGE_NAME: plant-map-digital-logbook

jobs:
  # Builds the docker image if the corresponding files changed
  build-docker:
    runs-on: ubuntu-latest
    permissions:
      packages: write

    steps:
      - name: Generate tags
        run: |
          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME

          # Change all uppercase to lowercase
          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
          # Save to env for later steps
          echo "image_id=$IMAGE_ID" >> $GITHUB_ENV

      - name: Checkout
        uses: actions/checkout@v2

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Log in to GitHub container registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push base image
        uses: docker/build-push-action@v2
        with:
          push: true
          file: .devcontainer/Dockerfile
          tags: ${{ env.image_id}}:${{ github.event.inputs.imageTag }}
          cache-from: type=registry,ref=${{ env.image_id }}:${{ github.event.inputs.imageTag }}
          cache-to: type=inline