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# Cobra
A Commander for modern go CLI interactions
Cobra is both a library for creating powerful modern CLI applications as well as a program to generate applications and command files.
Many of the most widely used Go projects are built using Cobra including:
* [Kubernetes](http://kubernetes.io/)
* [Hugo](http://gohugo.io)
* [Rocket](https://github.com/coreos/rkt)
* [Docker (distribution)](https://github.com/docker/distribution)
* [OpenShift](https://www.openshift.com/)
* [Delve](https://github.com/derekparker/delve)
* [GopherJS](http://www.gopherjs.org/)
* [CochroachDB](http://www.cockroachlabs.com/)
* [Bleve](http://www.blevesearch.com/)
* [ProjectAtomic (enterprise)](http://www.projectatomic.io/)
* [Parse (CLI)](https://parse.com/)
[![Build Status](https://travis-ci.org/spf13/cobra.svg)](https://travis-ci.org/spf13/cobra)
## Overview
Cobra is a commander providing a simple interface to create powerful modern CLI
interfaces similar to git & go tools. In addition to providing an interface, Cobra
simultaneously provides a controller to organize your application code.
Cobra is a library providing a simple interface to create powerful modern CLI
interfaces similar to git & go tools.
Inspired by go, go-Commander, gh and subcommand, Cobra improves on these by
providing **fully posix compliant flags** (including short & long versions),
**nesting commands**, and the ability to **define your own help and usage** for any or
all commands.
Cobra is also an application that will generate your application scaffolding to rapidly
develop a Cobra based application.
Cobra provides:
* Easy sub-command based CLIs: `app server`, `app fetch`, etc.
* Fully posix compliant flags (including short & long versions)
* Nested sub commands
* Global, local and cascading flags
* Easy generation of applications & commands with `cobra create appname` & `cobra add cmdname`
* Intelligent suggestions (`app srver`.. did you mean `app server`)
* Automatic help generation for commands and flags
* Automatic detailed help for `app help [command]`
* Automatic help flag recognition of `-h`, `--help`, etc.
* Automatically generated bash autocomplete for your application
* Automatically generated man pages for your application
* Command aliases so you can change things without breaking them
* The flexibilty to define your own help, usage, etc
* Optional tight integration with [viper](http://github.com/spf13/viper) for 12 factor apps
Cobra has an exceptionally clean interface and simple design without needless
constructors or initialization methods.