urfave/cli

Analysis updated 2026-06-21

★ 24,018GoAudience · developerComplexity · 2/5Setup · easy

Mindmap

mindmap
  root((repo))
    What it does
      CLI app builder
      Flag handling
      Auto help text
    Features
      Subcommands
      Shell autocomplete
      Config file support
    Use Cases
      Dev tools in Go
      Automation scripts
      System utilities
    Tech Stack
      Go only
      No dependencies
    Audience
      Go developers
      Tool builders

mindmap root((repo)) What it does CLI app builder Flag handling Auto help text Features Subcommands Shell autocomplete Config file support Use Cases Dev tools in Go Automation scripts System utilities Tech Stack Go only No dependencies Audience Go developers Tool builders

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What do people build with it?

USE CASE 1

Build a Go command-line tool with multiple subcommands, similar to how git has commit, push, and pull as separate commands.

USE CASE 2

Add flags and environment variable support to a Go CLI program with automatic help text generation included.

USE CASE 3

Create a developer automation script in Go that reads options from the command line, environment variables, or a config file.

What is it built with?

How does it compare?

	urfave/cli	charmbracelet/crush	cilium/cilium
Stars	24,018	23,930	24,286
Language	Go	Go	Go
Setup difficulty	easy	moderate	hard
Complexity	2/5	3/5	4/5
Audience	developer	developer	ops devops

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 30min

Pure Go with no external dependencies, just add it to your go.mod file.

In plain English

urfave/cli is a Go library for building command-line tools. The problem it solves is that writing a proper CLI application from scratch, handling flags, subcommands, help text, and configuration, involves a lot of boilerplate code. This library lets you describe your command structure declaratively, meaning you define what your tool does and the library handles the plumbing. Key features include support for commands and subcommands (like how "git commit" and "git push" are subcommands of "git"), automatic help text generation, shell auto-completion for bash, zsh, fish, and PowerShell, and flexible flag handling. Flags, the options you pass to a command, like "--verbose" or "-n 5", can be read from the command line, from environment variables, or from configuration files. The library has no external dependencies beyond Go's own standard library, keeping it lightweight. You would use this when building any Go program that is meant to be run from a terminal, such as developer tools, automation scripts, or system utilities. It is well-suited for projects that need a clean, structured CLI with multiple commands and options.

Copy-paste prompts

Prompt 1

Using urfave/cli in Go, write a CLI tool with two subcommands: one that uploads a file and one that downloads a file, each with their own flags.

Prompt 2

Show me how to add shell autocomplete support to my urfave/cli Go app for both bash and zsh users.

Prompt 3

Write a Go CLI app with urfave/cli that reads a --config flag falling back to a CONFIG env variable, with a default value if neither is set.

Prompt 4

How do I use urfave/cli to build a subcommand that accepts positional arguments alongside optional flags in Go?

Frequently asked questions

What is cli?

urfave/cli is a Go library that makes it easy to build command-line tools with flags, subcommands, and auto-generated help text, with no external dependencies beyond Go's standard library.

What language is cli written in?

Mainly Go. The stack also includes Go.

How hard is cli to set up?

Setup difficulty is rated easy, with roughly 30min to a first successful run.

Who is cli for?

Mainly developer.

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