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