cmd

Documentation

Overview

Package cmd provides helpers for executing shell commands with proper error handling.

This package wraps os/exec.Cmd to capture stderr and include it in error messages, making command failures more informative for users.

Usage

cmd := exec.Command("git", "status")
if err := cmd.Run(cmd); err != nil {
    // err contains stderr output if available
    return fmt.Errorf("git failed: %w", err)
}

// For commands that return output:
output, err := cmd.Output(exec.Command("git", "branch"))
if err != nil {
    // err contains stderr output
}

Design Notes

The wt tool shells out to git/gh/glab CLIs rather than using Go libraries. This approach is simpler, more reliable, and ensures compatibility with user configurations (SSH keys, credential helpers, etc.).

Index

• func Output(cmd *exec.Cmd) ([]byte, error)
• func Run(cmd *exec.Cmd) error

Functions

func Output

func Output(cmd *exec.Cmd) ([]byte, error)

Output executes a command and returns stdout, with stderr in error if it fails

func Run

func Run(cmd *exec.Cmd) error

Run executes a command and returns stderr in the error message if it fails