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# Welcome to urfave/cli
[](https://pkg.go.dev/github.com/urfave/cli/v2)
[](https://codebeat.co/projects/github-com-urfave-cli)
[](https://goreportcard.com/report/urfave/cli)
[](https://codecov.io/gh/urfave/cli)
`urfave/cli` is a simple, fast, and fun package for building command line apps in Go. The
goal is to enable developers to write fast and distributable command line applications in
an expressive way.
These are the guides for each major supported version:
- [`v2`](./v2/getting-started)
- [`v1`](./v1/getting-started)
In addition to the version-specific guides, these other documents are available:
- [CONTRIBUTING](./CONTRIBUTING/)
- [CODE OF CONDUCT](./CODE_OF_CONDUCT/)
- [RELEASING](./RELEASING/)
## Installation
Using this package requires a working Go environment. [See the install instructions for Go](http://golang.org/doc/install.html).
Go Modules are required when using this package. [See the go blog guide on using Go Modules](https://blog.golang.org/using-go-modules).
### Using `v2` releases
```
$ go get github.com/urfave/cli/v2
```
```go
...
import (
"github.com/urfave/cli/v2" // imports as package "cli"
)
...
```
### Using `v1` releases
```
$ go get github.com/urfave/cli
```
```go
...
import (
"github.com/urfave/cli"
)
...
```
### Build tags
You can use the following build tags:
#### `urfave_cli_no_docs`
When set, this removes `ToMarkdown` and `ToMan` methods, so your application
won't be able to call those. This reduces the resulting binary size by about
300-400 KB (measured using Go 1.18.1 on Linux/amd64), due to fewer dependencies.
### Supported platforms
cli is tested against multiple versions of Go on Linux, and against the latest
released version of Go on OS X and Windows. This project uses GitHub Actions
for builds. To see our currently supported go versions and platforms, look at
the [github workflow
configuration](https://github.com/urfave/cli/blob/main/.github/workflows/cli.yml).
|
