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|
---
tags:
- v2
search:
boost: 2
---
Being a programmer can be a lonely job. Thankfully by the power of automation
that is not the case! Let's create a greeter app to fend off our demons of
loneliness!
Start by creating a directory named `greet`, and within it, add a file,
`greet.go` with the following code in it:
<!-- {
"output": "Hello friend!"
} -->
```go
package main
import (
"fmt"
"log"
"os"
"github.com/urfave/cli/v2"
)
func main() {
app := &cli.App{
Name: "greet",
Usage: "fight the loneliness!",
Action: func(*cli.Context) error {
fmt.Println("Hello friend!")
return nil
},
}
if err := app.Run(os.Args); err != nil {
log.Fatal(err)
}
}
```
Install our command to the `$GOPATH/bin` directory:
```sh-session
$ go install
```
Finally run our new command:
```sh-session
$ greet
Hello friend!
```
cli also generates neat help text:
```sh-session
$ greet help
NAME:
greet - fight the loneliness!
USAGE:
greet [global options] command [command options] [arguments...]
COMMANDS:
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS
--help, -h show help (default: false)
```
|
