docker-test.yml

name: Test Build-Env Docker Image
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
  cancel-in-progress: true

on:
  workflow_dispatch:
  pull_request:
    branches: master
    paths:
    - 'docker/**'
    - '!**.md'
    - '**docker-test.yml'

jobs:
  build-test-env-image:
    runs-on: ubuntu-latest
    env:
      SOURCE_ROOT: ${{ github.workspace }}
      ENTRYPOINT: ${{ github.workspace }}/docker/default-entry.sh
    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0

    - name: Set variables
      run: |
        OWNER_LC=${GITHUB_REPOSITORY_OWNER,,}
        echo "OWNER_LC=$OWNER_LC" >>${GITHUB_ENV}
        echo "IMAGE=ghcr.io/$OWNER_LC/vs-fltk:build-env" >>${GITHUB_ENV}

    - name: Check if Dockerfile has changed
      run: |
        if [ "${{ github.ref }}" != "refs/heads/master" ]; then
          FILES=$(git log -1 -p ./ | grep +++ | cut -d '/' -f 2-| sed -e 's|dev/null||g')
          if echo "$FILES" | grep -qE "^(docker/Dockerfile)$"; then
            echo "do_build=true" >> $GITHUB_ENV
          else
            echo "do_build=false" >> $GITHUB_ENV
          fi
        else
          # If there was a push to trunk, we don't want the docker build
          # to run. All the builds in docker.yml will be pushed when *that*
          # workflow runs, so we really don't want to be adding extra builds
          # that won't become "permanent".
          # Theoretically, if changes to Dockerfile are pushed to master, it should
          # already have been tested anyway.
          #
          # That may mean the test will fail if the image don't exist yet
          # in the registry or there was a dramatic change in the Dockerfile
          # that might break the test that runs via docker compose.
          # That's ok for now. We'll see how things go...
          echo "do_build=false" >> $GITHUB_ENV
        fi

    - name: Cache Docker layers
      if: ${{ env.do_build == 'true' }}
      id: docker-cache
      uses: actions/cache@v3
      with:
        path: ${{ github.workspace }}/.docker/buildx-cache
        key: ${{ runner.os }}-docker-${{ github.ref_name }}
        restore-keys: |
          ${{ runner.os }}-docker-

    - name: Set up Docker Buildx
      if: ${{ env.do_build == 'true' }}
      uses: docker/setup-buildx-action@v3

    - name: Build Docker image
      if: ${{ env.do_build == 'true' }}
      run: docker build -t $IMAGE -f docker/Dockerfile ./docker

    - name: Run commands in Docker container
      run: |
        export HOSTUID=$(id -u)
        export HOSTGID=$(id -g)
        docker compose -f docker/docker-compose.yml run --rm  dev