# command

utils for command line app

Provide two style for command line args parse:

- use struct field tag
- use command

## Usage

use struct field tag

```go
type targs struct {
	Test     string `flag_default:"test" flag_usage:"this is test"`
	TestBool bool   `flag_short:"b"`
	TestInt  int
}
	sargs := &targs{}
	v, _ := NewFVSet(sargs)
	v.Usage()
	err := Parse([]string{"--test", "test", "--test-bool", "--test-int", "1"}, v)
```

use command style

```go
package main

import (
	"fmt"
	"os"

	"git.pyer.club/kingecg/command"
)

func main() {
	var cmd = command.NewCommand("test", "test command")
	cmd.AddArg("arg1", "a", "arg1 description", "default value")
	cmd.AddArg("arg2", "b", "arg2 description", "default value")
	cmd.AddSubCommand("sub1", "sub1 description")
	cmd.Parse(os.Args[1:])
	fmt.Println(cmd.GetGlobalOptions())
}

```