build-docker-meta.yml

name: build-docker-meta

run-name: ${{ inputs.context_dir }}

on:
  workflow_dispatch:
    inputs:
      context_dir:
        type: string
        description: path to the directory containing the Dockerfile and meta.yml file (e.g. common/ccbr_chipseeker/)
        required: true
      push:
        type: boolean
        description: Push to DockerHub (uncheck to only build the container without pushing)
        required: true
        default: true

jobs:
  build-docker:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: pietrobolcato/action-read-yaml@1.0.0
        id: metadata
        with:
          config: ${{ github.workspace }}/${{ github.event.inputs.context_dir }}/meta.yml
      - name: Login to DockerHub
        if: ${{ github.event.inputs.push == 'true' }}
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Prepare build-time variables
        id: vars
        run: |
          echo "DATE=$(date +"%Y-%m-%d")" >> "$GITHUB_OUTPUT"

          if [ ! -f ${{ github.event.inputs.context_dir }}/Dockerfile ] ; then
            echo "ERROR: Dockerfile not found: ${{ github.event.inputs.context_dir }}/Dockerfile"
            exit 1
          fi
          # for Docker Hub Description
          echo " # ${{ github.repository }} ${{ steps.metadata.outputs['image_name'] }}\n" > tmp_README.md
          echo "Dockerfile source: https://github.com/${{ github.repository }}/blob/${{ github.sha }}/${{ github.event.inputs.context_dir }}/Dockerfile\n" >> tmp_README.md
      - name: Build and push
        uses: docker/build-push-action@v4
        # only try building & pushing the container if parsing the metadata worked
        if: ${{ steps.metadata.outputs['container'] != '' }}
        with:
          context: ${{ github.event.inputs.context_dir }}
          push: ${{ github.event.inputs.push }}
          tags: ${{ steps.metadata.outputs['container'] }}
          build-args: |
            BUILD_DATE=${{ steps.vars.outputs.DATE }}
            BUILD_TAG=${{ steps.metadata.outputs['version'] }}
            REPONAME=${{ steps.metadata.outputs['image_name'] }}
      - name: Update Docker Hub Description
        if: ${{ (github.event.inputs.push == 'true') && (steps.build-and-push.outcome == 'success') }}
        uses: peter-evans/dockerhub-description@v4
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
          repository: ${{ steps.metadata.outputs['dockerhub_namespace'] }}/${{ steps.metadata.outputs['image_name'] }}
          readme-filepath: tmp_README.md