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C-Line and Docker Integration: Building and Running C++ Projects in Isolated Environments

• 0:00:03 Introduction: Timo Doomler, Developer Advocate at JetBrains, introduces the new Docker integration in CLion for C++ development.
• 0:00:14 Use Case: Docker is useful for building and running C++ projects in isolated, consistently configured environments.
• 0:00:22 Docker Setup: The demo uses an Ubuntu machine with Docker already installed. Instructions for Docker setup are available in the official Docker documentation.
• 0:00:35 Alpine Image: An Alpine Linux image is used due to its lightweight and efficient nature, making it popular for Docker containers.
• 0:00:45 Dockerfile: The Dockerfile sets up the compiler (GCC), CMake, and other tools within the Alpine image.
• 0:01:09 Example Project: A simple C++ program that prints the hostname using the uname system call is used.
• 0:01:25 Running in Docker: CLion 2021.3 and later offers full Docker integration, allowing projects to be built and run inside Docker containers using the built-in Docker toolchain.
• 0:01:41 Docker Toolchain Setup: Go to Settings -> Build, Execution, Deployment -> Toolchains. Add a new toolchain and select "Docker".
• 0:01:53 Connecting to Docker Daemon: Click the cogwheel to configure the connection to the Docker daemon. The recommended setting is the default for your OS (Unix socket on Linux).
• 0:02:07 Selecting a Docker Image: Choose the Docker image (e.g., the Alpine image created earlier) for the project. CLion detects the compiler and CMake versions within the image.
• 0:02:23 CMake Profile: Create a new CMake profile that uses the Docker toolchain. Either drag the docker toolchain to the top of the list (to make it the default), or create a new profile.
• 0:02:50 CMake Reload and Version Fix: Adjust the CMakeLists.txt minimum required version if necessary, as the Docker image might have a different CMake version.
• 0:03:05 Running the Project: Select the Docker profile in CLion's run configuration dropdown. The program now prints the Docker container ID as the hostname.
• 0:03:18 Seamless Integration: CLion mounts the project directory into a temporary folder within the container's sandboxed file system. This is more efficient than previous methods using SSH.
• 0:03:42 MacOS and Windows: Docker Desktop is typically used on macOS and Windows, but CLion's integration works the same way. Default connection methods are "Docker for Windows" and "Docker for Mac".
• 0:04:33 Windows-Specific Recommendations: For optimal performance on Windows with Docker:
  • Use WSL2 and a WSL2 backend for Docker.
  • Install a WSL2 Linux distribution (e.g., Ubuntu) and enable Docker integration with it (Resources -> WSL Integration in Docker Desktop settings).
  • Place the project source code within the WSL2 distribution's file system (e.g., \\wsl$\Ubuntu\home\<user>).
• 0:05:36 Docker Plugin: CLion comes bundled with the Docker plugin (Services tab), providing more options for browsing containers, images, and their properties.
• 0:06:00 Conclusion: Free 30 day trial of c-line through jetpens.com.