docker-image.yml

name: "Docker Image CI"

on:
  push:
    paths-ignore:
      - "**.md"
  pull_request:
    paths-ignore:
      - "**.md"
  workflow_dispatch:
    inputs:
      release:
        type: boolean
        description: "Release the built Docker image into 'ghcr.io'"

jobs:
  lint:
    name: "Lint"
    runs-on: "ubuntu-20.04"
    steps:
      - uses: "actions/checkout@v4"
      - name: "Download ShellCheck"
        uses: "robinraju/release-downloader@v1.10"
        with:
          repository: "koalaman/shellcheck"
          tag: "v0.10.0"
          filename: "shellcheck-v*.linux.x86_64.tar.xz"
          tarBall: false
          zipBall: false
      - name: "Extract ShellCheck"
        run: |
          tar xvf ./shellcheck-v*.tar.xz
          rm -v   ./shellcheck-v*.tar.xz
          mv -v   ./shellcheck-v*/shellcheck "./shellcheck"
          rm -rv  ./shellcheck-v*
          ./shellcheck --version
      - name: "Install PyCodeStyle"
        run: |
          sudo apt-get install -y --no-install-recommends \
            python3-pycodestyle
      - name: "ShellCheck"
        run: |
          ./shellcheck \
            --color=always \
            etc/cron.*/* \
            usr/local/*bin/*
      - name: "PyCodeStyle"
        run: |
          python3 -m pycodestyle \
            .

  build:
    name: "Build ${{ github.event_name == 'workflow_dispatch' && inputs.release && 'and Deploy' || '' }} Docker Image"
    env:
      RUNS_ON: "ubuntu-20.04"
    permissions:
      packages: "write"
    runs-on: "ubuntu-20.04"
    steps:
      - name: "Build Docker Image"
        uses: "docker/build-push-action@v5"
        with:
          load: true
          tags: "distcc-docker:${{ env.RUNS_ON }}"
      - name: "Test starting the container"
        run: |
          docker run \
            --init \
            --rm \
            "distcc-docker:${{ env.RUNS_ON }}" \
              --jobs $(nproc) \
              -- \
              bash -c \
                "set -x; ps fauxw; /usr/bin/ls -alh .; /usr/bin/ls -alh /var/log; cat /var/log/*; exit;"
      - name: "Test that \"dcc_free_mem\" is reported"
        run: |
          set -ex

          docker run \
            --detach \
            --init \
            --name "distcc-1" \
            --publish "3632:3632/tcp" \
            --publish "3633:3633/tcp" \
            --rm \
            "distcc-docker:${{ env.RUNS_ON }}" \
              --jobs $(nproc) \
              -- \
                bash -c "set -x; sleep 120; exit;"

          sleep 10
          STAT_RESULT="$(curl "http://localhost:3633" | grep "dcc_free_mem")"
          if [ -z "$STAT_RESULT" ]; then
            echo "Server did not report 'dcc_free_mem'!" >&2
            exit 1
          fi

          docker kill "distcc-1"
      - name: "Test compilation in the container"
        run: |
          set -ex

          sudo apt-get update -y
          sudo apt-get install distcc g++ --no-install-recommends
          sudo update-distcc-symlinks

          docker run \
            --detach \
            --init \
            --name "distcc-1" \
            --publish "3632:3632/tcp" \
            --publish "3633:3633/tcp" \
            --rm \
            "distcc-docker:${{ env.RUNS_ON }}" \
              --jobs $(nproc) \
              -- \
                bash -c "set -x; sleep 120; exit;"

          sleep 10
          curl "http://localhost:3633"

          echo "int main() { return MY_EXIT_CODE; }" >> main.cpp

          DISTCC_HOSTS="127.0.0.1:3632/$(nproc),lzo" \
            distcc /usr/bin/g++ \
            -D MY_EXIT_CODE=42 \
            -c \
            ./main.cpp \
            -o main.o

          rm -v main.cpp

          curl "http://localhost:3633" | grep "dcc_compile_ok 1"

          docker kill "distcc-1"

          /usr/bin/g++ main.o -o main

          set +e

          ./main
          if [ "$?" -ne 42 ]; then
            echo "Unexpected error code obtained!" >&2
            exit 1
          fi
      - name: "Log in to GitHub Container Registry (GHCR)"
        if: "github.ref == 'refs/heads/master' && github.event_name == 'workflow_dispatch' && inputs.release"
        uses: "docker/login-action@v3"
        with:
          registry: "ghcr.io"
          username: "${{ github.actor }}"
          password: "${{ secrets.GITHUB_TOKEN }}"
      - name: "Upload image to GHCR"
        if: "github.ref == 'refs/heads/master' && github.event_name == 'workflow_dispatch' && inputs.release"
        uses: "docker/build-push-action@v5"
        with:
          push: true
          tags: "ghcr.io/${{ github.actor }}/distcc-docker:${{ env.RUNS_ON }}"