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Packaging Implementation Progress

Phase 1: CMake Infrastructure ✅ COMPLETED

1.1 Version Management ✅

  • Created: include/docker_cpp/version.hh
    • Semantic versioning constants (MAJOR: 0, MINOR: 1, PATCH: 0)
    • Version string: "0.1.0"
    • Utility functions for version info
    • Location: include/docker_cpp/version.hh

1.2 CMake Refactoring ✅

  • Updated: CMakeLists.txt
    • Removed hardcoded set(CMAKE_BUILD_TYPE Debug)
    • Added CMAKE_BUILD_TYPE option (defaults to Release)
    • Added BUILD_SHARED_LIBS option (defaults to ON)
    • Added BUILD_TESTS option (defaults to ON)
    • Added version variables for semantic versioning
    • Added HOMEPAGE_URL
    • Changes:
      • Build type now configurable per platform
      • Shared library builds enabled by default (needed for system packages)
      • Tests can be disabled for package builds

1.3 Library Versioning ✅

  • Updated: src/CMakeLists.txt
    • Set VERSION property (0.1.0)
    • Set SOVERSION property (0)
    • Configured library installation targets
    • Result: Produces libdocker_cpp_client.so.0 (SOVERSION-based naming)

1.4 Installation Targets ✅

  • Updated: CMakeLists.txt with install() directives:
    • Headers installed to include/
    • Library installed to lib/
    • CMake config files to lib/cmake/docker_cpp/
    • pkg-config file to lib/pkgconfig/

1.5 pkg-config Support ✅

  • Created: docker_cpp.pc.in template
    • Provides pkg-config --cflags --libs docker_cpp capability
    • Automatically generated and installed
    • Usage: Downstream projects can use pkg-config to find libraries

1.6 CMake Package Discovery ✅

  • Created: docker_cppConfig.cmake.in
    • Enables find_package(docker_cpp) for downstream projects
    • Exports targets as docker_cpp::docker_cpp
    • Declares dependencies (Boost, CURL, spdlog)

Phase 2: Debian/Ubuntu Packaging ✅ COMPLETED

2.1 Debian Package Files ✅

debian/control

  • Binary packages: libdocker-cpp0 (runtime) and libdocker-cpp-dev (development)
  • Build dependencies specified
  • Proper dependencies between packages
  • maintainer email placeholder (update as needed)

debian/rules

  • Build configuration with hardening flags
  • Release build type (-DCMAKE_BUILD_TYPE=Release)
  • Tests disabled for packages
  • Shared library build enabled

debian/libdocker-cpp0.install

  • Runtime library with SOVERSION: /usr/lib/*/libdocker_cpp_client.so.*

debian/libdocker-cpp-dev.install

  • Headers: /usr/include/
  • Static and shared library links: /usr/lib/*/libdocker_cpp_client.*
  • pkg-config file: /usr/lib/*/pkgconfig/docker_cpp.pc
  • CMake config files: /usr/lib/*/cmake/

debian/copyright

  • Apache 2.0 license declarations
  • Copyright holders listed

debian/changelog

  • Initial 0.1.0-1 release
  • Proper format for dpkg

debian/compat

  • Debhelper 13 compatibility

2.2 Building .deb Packages

# From project root:
debuild -us -uc      # Unsigned build
dpkg-buildpackage -us -uc  # Alternative method

Output:

  • libdocker-cpp0_0.1.0-1_amd64.deb (runtime)
  • libdocker-cpp-dev_0.1.0-1_amd64.deb (development)
  • libdocker-cpp_0.1.0-1_amd64.changes (build info)

2.3 Installing .deb Packages

sudo dpkg -i libdocker-cpp0_0.1.0-1_amd64.deb
sudo dpkg -i libdocker-cpp-dev_0.1.0-1_amd64.deb

Phase 3: Homebrew Packaging ✅ COMPLETED

3.1 Homebrew Formula ✅

  • Created: Formula/docker-cpp.rb
    • Installs from GitHub release tarball
    • Dependencies: boost, curl, spdlog, nlohmann-json
    • Release build configuration
    • Shared library enabled
    • Simple test using pkg-config
    • SHA256 placeholder (needs to be calculated for actual releases)

3.2 Installation

brew install --build-from-source ./Formula/docker-cpp.rb

Phase 4: Documentation & Scripts ✅ COMPLETED

4.1 Packaging Documentation ✅

  • Created: docs/PACKAGING.md
    • Build configuration options
    • Step-by-step Debian packaging
    • Homebrew publishing process
    • Installation verification
    • Downstream project usage
    • Release process checklist
    • Homebrew Core submission guide

4.2 Version Bump Script ✅

  • Created: scripts/bump-version.sh
    • Automated version updates
    • Updates CMakeLists.txt
    • Updates include/docker_cpp/version.hh
    • Updates debian/changelog
    • Usage: ./scripts/bump-version.sh 0.2.0
    • Executable: Yes

4.3 README Updates ✅

  • Updated: README.md
    • Added Installation section
    • Package manager instructions (Homebrew, apt-get)
    • Source build instructions
    • Installation verification commands

Phase 5: GitHub Actions CI/CD ✅ COMPLETED

5.1 GitHub Actions Workflow - Build ✅

File: .github/workflows/build_cmake.yml Updates:

  • Renamed existing Ubuntu job to "Ubuntu Debug" for clarity
  • Added ubuntu-release job for Release builds
  • Added macos-release-x86_64 job for macOS Release builds
  • Release jobs configure with -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON
  • Artifact upload configured for Release builds

5.2 GitHub Actions Workflow - Release ✅

File: .github/workflows/release.yml Features:

  • Triggered on semantic version tags (v*..)
  • Extracts version from git tag
  • Builds Release configuration
  • Creates source tarball
  • Builds .deb packages using debuild
  • Creates GitHub Release with automated notes
  • Uploads all artifacts (source tarball, .deb files)
  • Build log preservation for debugging
  • 30-day artifact retention

5.3 Release Workflow Details ✅

Automated Release Process:

  1. On tag push (e.g., git tag v0.1.0 && git push origin v0.1.0)
  2. Workflow extracts version: 0.1.0
  3. Builds Release binary
  4. Creates source tarball: docker-cpp-0.1.0.tar.gz
  5. Executes debuild -us -uc -b to generate:
    • libdocker-cpp0_0.1.0-1_amd64.deb (runtime)
    • libdocker-cpp-dev_0.1.0-1_amd64.deb (dev)
  6. Creates GitHub Release with pre-filled notes
  7. Uploads all artifacts to the Release
  8. Workflow logs available for troubleshooting

Release Notes Template:

  • Installation instructions for .deb files
  • Homebrew installation note (manual setup required)
  • Lists all available artifacts
  • Link to PACKAGING.md

Phase 6: Validation & Testing Infrastructure ✅ COMPLETED

6.1 Validation Script ✅

File: scripts/validate-packaging.sh Features:

  • 9-phase comprehensive validation (executable)
    1. Check CMake Infrastructure (version.hh, CMakeLists.txt)
    2. Build Release Configuration (Ninja, Release mode)
    3. Test Installation Targets (verify install locations)
    4. Validate pkg-config (pkg-config discovery)
    5. Validate CMake Config (find_package() integration)
    6. Check Debian Packaging (all debian/ files present)
    7. Validate Homebrew Formula (syntax and audit)
    8. Check Version Bump Script (executable status)
    9. Validate Documentation (PACKAGING.md, progress tracking)
  • Color-coded output (green/red/yellow)
  • Cleanup of temporary directories
  • Prints next steps and commands for user

Usage:

./scripts/validate-packaging.sh

Output:

  • Lists all checks with pass/fail status
  • Creates temporary install directory for validation
  • Tests pkg-config with custom PKG_CONFIG_PATH
  • Tests CMake find_package() with test consumer project
  • Provides actionable next steps

6.2 Downstream Test Project ✅

Directory: tests/downstream_test/ Contains:

  • CMakeLists.txt - Example consumer project
    • Uses find_package(docker_cpp REQUIRED)
    • Shows both CMake and pkg-config approaches (commented)
    • Links with dependencies (spdlog, nlohmann_json)
  • main.cpp - Complete example application
    • Demonstrates Docker client initialization
    • Shows 3 test cases:
      1. Ping Docker daemon
      2. Get Docker version info
      3. Get Docker system info
    • Error handling with try/catch
    • Comprehensive logging with spdlog
  • README.md - Integration documentation
    • Prerequisites for building
    • Two build methods (local and with explicit paths)
    • Integration patterns (4 common use cases)
    • Error handling guide
    • Alternative integration methods

Key Demonstration:

  • How consumers would structure their CMakeLists.txt
  • Proper error handling for Docker API calls
  • Logging setup with spdlog
  • Multiple Docker commands usage

6.3 Validation Commands Reference ✅

Quick Validation:

# Run comprehensive validation
./scripts/validate-packaging.sh

# Manual Release build test
cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -G Ninja -S . -B build-rel
cmake --build build-rel
cmake --install build-rel --prefix /tmp/test-install

# Test downstream project
cmake -DCMAKE_PREFIX_PATH=/tmp/test-install/lib/cmake -S tests/downstream_test -B test-build
cmake --build test-build
./test-build/consumer_example

Debian Package Testing:

# Requires: sudo apt-get install debhelper devscripts fakeroot
debuild -us -uc -b
sudo dpkg -i ../*.deb

Homebrew Formula Testing:

# Requires: Homebrew installed
brew audit --strict ./Formula/docker-cpp.rb
brew install --build-from-source ./Formula/docker-cpp.rb

Files Created/Modified Summary

Created Files

  1. include/docker_cpp/version.hh - Version constants
  2. docker_cpp.pc.in - pkg-config template
  3. docker_cppConfig.cmake.in - CMake package config
  4. debian/control - Debian package metadata
  5. debian/rules - Debian build rules
  6. debian/libdocker-cpp0.install - Runtime package files
  7. debian/libdocker-cpp-dev.install - Dev package files
  8. debian/copyright - License information
  9. debian/changelog - Release history
  10. debian/compat - Debhelper compatibility
  11. Formula/docker-cpp.rb - Homebrew formula
  12. docs/PACKAGING.md - Packaging documentation
  13. scripts/bump-version.sh - Version bump utility
  14. .github/workflows/release.yml - GitHub Release workflow ✨ NEW
  15. scripts/validate-packaging.sh - Validation script ✨ NEW
  16. tests/downstream_test/CMakeLists.txt - Consumer example ✨ NEW
  17. tests/downstream_test/main.cpp - Consumer main code ✨ NEW
  18. tests/downstream_test/README.md - Consumer documentation ✨ NEW

Modified Files

  1. CMakeLists.txt - Added versioning, options, install targets, pkg-config, CMake config
  2. src/CMakeLists.txt - Added SOVERSION, install() target
  3. README.md - Added Installation section with package manager instructions
  4. .github/workflows/build_cmake.yml - Added Release build jobs ✨ UPDATED

Complete Implementation Status

✅ Phases 1-6 FULLY COMPLETED

The complete packaging infrastructure is now in place:

  • Version management with semantic versioning
  • CMake integration (find_package, pkg-config)
  • Debian/Ubuntu package structure
  • Homebrew formula
  • GitHub Actions for automated builds and releases
  • Comprehensive validation infrastructure
  • Downstream consumer examples

Ready-to-Use Features

  1. Local Release Builds:

    cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -G Ninja -S . -B build
cmake --build build
cmake --install build --prefix /usr

  2. Automated Validation:

    ./scripts/validate-packaging.sh

  3. Package Building:

    debuild -us -uc -b  # Creates .deb files

  4. Downstream Integration:

    find_package(docker_cpp REQUIRED)
target_link_libraries(myapp PRIVATE docker_cpp::docker_cpp)

  5. Automated GitHub Releases:

    git tag v0.1.0
git push origin v0.1.0
# Workflow automatically builds, packages, and releases

Next Steps (Post-Implementation)

Immediate Actions

  • Run ./scripts/validate-packaging.sh to verify all infrastructure
  • Test Release build locally with validation script
  • Test downstream project build in tests/downstream_test/
  • Build .deb packages (requires: sudo apt-get install debhelper devscripts fakeroot)

For Release (When Ready)

  • Calculate SHA256 hash for actual release: 
    SHA256=$(sha256sum docker-cpp-0.1.0.tar.gz | cut -d' ' -f1)
sed -i "s/sha256 .*/sha256 '${SHA256}'/" Formula/docker-cpp.rb
  • Tag release: git tag v0.1.0 && git push origin v0.1.0
  • Verify GitHub Actions workflow executes successfully
  • Verify artifacts uploaded to GitHub Releases

For Distribution

  • Submit Homebrew formula to homebrew-core
  • Optional: Set up Launchpad PPA for Ubuntu distribution
  • Create release notes with installation instructions
  • Update project documentation with installation links

Configuration Reference

Build Options

-DCMAKE_BUILD_TYPE=Release          # Build type
-DBUILD_SHARED_LIBS=ON              # Shared library (ON for packages)
-DBUILD_TESTS=OFF                   # Disable tests for packages
-DCMAKE_INSTALL_PREFIX=/usr/local   # Install path

Version Information

  • Current Version: 0.1.0
  • SOVERSION: 0
  • Package Naming: docker-cpp (Homebrew), libdocker-cpp (Debian)
  • Library Name: libdocker_cpp_client

Supported Platforms

  • macOS: 10.15+ (Homebrew)
  • Ubuntu: 20.04 LTS, 22.04 LTS, 24.04 LTS (Debian)
  • Debian: 11 (Bullseye), 12 (Bookworm)