Golang Go语言中从零实现一个命令行解析器

出发点

分享下从零实现一个命令解析器的所有细节。

项目地址

https://github.com/guonaihong/clop

一个简单的例子(以 linux cat 命令举例)

package main
import (
“fmt”
“github.com/guonaihong/clop”
)
type cat struct {
NumberNonblank bool clop:"-c;--number-nonblank" 	 usage:"number nonempty output lines, overrides"
ShowEnds bool `clop:"-E;--show-ends" 
               usage:"display $ at end of each line"`

Number bool `clop:"-n;--number" 
             usage:"number all output lines"`

SqueezeBlank bool `clop:"-s;--squeeze-blank" 
                   usage:"suppress repeated empty output lines"`

ShowTab bool `clop:"-T;--show-tabs" 
              usage:"display TAB characters as ^I"`

ShowNonprinting bool `clop:"-v;--show-nonprinting" 
                      usage:"use ^ and M- notation, except for LFD and TAB" `

Files []string `clop:"args=files"`
}
func main() {
c := cat{}
err := clop.Bind(&c)

fmt.Printf("%#v, %s\n", c, err)
}