Cross-Platform Support
The Docker CLI is designed to work on a variety of operating systems and architectures. This document outlines how cross-platform support is achieved within the Docker CLI codebase.
Platform-Specific Features
The Docker CLI uses a combination of techniques to address platform-specific features:
- Conditional Compilation: The
gocompiler uses build tags to control the inclusion of platform-specific code during the build process. For example, the following code snippet demonstrates how build tags are used to include Windows-specific code:
// +build windows
package main
import "fmt"
func main() {
fmt.Println("This code is only compiled on Windows.")
}
- Cross-Compilation: The Docker CLI utilizes cross-compilation to build binaries for different architectures from a single source codebase. For example, the following command builds a Docker CLI binary for Linux on an x86-64 architecture:
GOOS=linux GOARCH=amd64 go build
Platform-Specific Libraries: The Docker CLI leverages platform-specific libraries to interact with operating system-level features. For instance, the
syscallpackage in Go provides platform-specific functions for interacting with system calls.Configuration: The Docker CLI uses configuration files to store platform-specific settings. These settings can include things like the default Docker daemon socket path or the location of the Docker installation directory.
Example:
The docker command, for instance, uses the docker-client library, which contains platform-specific implementations to interact with the Docker daemon running on the host operating system.
cli/command/container/create.go
Note:
The Docker CLI uses a variety of techniques to support different operating systems and architectures. The codebase is carefully designed to handle platform-specific features and dependencies, ensuring a consistent experience across different platforms.
