docker.yml

name: docker

on:
  workflow_dispatch:
  release:
    types: [published]

env:
  IMAGE_NAME: "scworkflow" # must be lowercase
  CONTEXT: "./"
  NAMESPACE: "nciccbr"

permissions: read-all

jobs:
  build-docker:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Prepare build-time variables
        id: vars
        run: |
          echo "DATE=$(date +"%Y-%m-%d")" >> "$GITHUB_OUTPUT"

          if [ '${{ github.event_name }}' == 'release' ]; then
            VERSION=${{ github.ref_name }}
            DOCKER_TAGS=${{ env.NAMESPACE }}/${{ env.IMAGE_NAME }}:${VERSION},${{ env.NAMESPACE }}/${{ env.IMAGE_NAME }}:latest
          else
            HASH=$(git rev-parse --short HEAD)
            VERSION="$(grep 'Version:' $CONTEXT/DESCRIPTION | sed 's/Version: /v/')_${HASH}"
            DOCKER_TAGS=${{ env.NAMESPACE }}/${{ env.IMAGE_NAME }}:${VERSION}
          fi
          echo "VERSION_TAG=$(echo $VERSION)" >> "$GITHUB_OUTPUT"
          echo "DOCKER_TAGS=$(echo $DOCKER_TAGS)" >> "$GITHUB_OUTPUT"

      - name: debug
        run: |
          echo "the github tag is ${{ github.ref_name }}"
          echo "github event_name is ${{ github.event_name }}"
          echo "the version tag is ${{ steps.vars.outputs.VERSION_TAG }}"

      - name: Login to DockerHub
        if: ${{ github.event_name != 'pull_request' }}
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Build and push
        uses: docker/build-push-action@v4
        with:
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.vars.outputs.DOCKER_TAGS }} # include 'latest' tag if this is a release
          context: ${{ env.CONTEXT }}
          file: ${{ env.CONTEXT }}/Dockerfile
          build-args: |
            BUILD_DATE=${{ steps.vars.outputs.DATE }}
            BUILD_TAG=${{ steps.vars.outputs.VERSION_TAG }}
            REPONAME=${{ env.IMAGE_NAME }}
            R_VERSION=4.3.2