内容简介:clop v0.1.0 已经发布,这是一个 Go 实现的纯结构体命令行解析器。 地址 https://gitee.com/guonaihong/clop https://github.com/guonaihong/clop 更新内容 修复使用tag且使用数据校验提示信息不对的问题 featur...
clop v0.1.0 已经发布,这是一个 Go 实现的纯结构体命令行解析器。
地址
https://gitee.com/guonaihong/clop
https://github.com/guonaihong/clop
更新内容
修复使用tag且使用数据校验提示信息不对的问题
feature
- 支持环境变量绑定
env DEBUG=xx ./proc
- 支持参数搜集
cat a.txt b.txt
,可以把a.txt, b.txt
散装成员归归类,收集到你指定的结构体成员里 - 支持短选项
proc -d
或者长选项proc --debug
不在话下 - posix风格命令行支持,支持命令组合
ls -ltr
是ls -l -t -r
简写形式,方便实现普通posix 标准命令 - 子命令支持,方便实现git风格子命令
git add
,简洁的子命令注册方式,只要会写结构体就行,3,4,5到无穷尽子命令也支持,只要你喜欢,用上clop就可以实现 - 默认值支持
default:"1"
,支持多种数据类型,让你省去类型转换的烦恼 - 贴心的重复命令报错
- 严格的短选项,长选项报错。避免二义性选项诞生
- 效验模式支持,不需要写一堆的
if x!= ""
orif y!=0
浪费青春的代码 - 可以获取命令优先级别,方便设置命令别名
内容
Installation
go get github.com/guonaihong/clop
Quick start
package main import ( "fmt" "github.com/guonaihong/clop" ) type Hello struct { File string `clop:"-f; --file" usage:"file"` } func main() { h := Hello{} clop.Bind(&h) fmt.Printf("%#v\n", h) } // ./one -f test // main.Hello{File:"test"} // ./one --file test // main.Hello{File:"test"}
example
base type
int
package main import ( "fmt" "github.com/guonaihong/clop" ) type IntDemo struct { Int int `clop:"short;long" usage:"int"` } func main() { id := &IntDemo{} clop.Bind(id) fmt.Printf("id = %v\n", id) } // ./int -i 3 // id = &{3} // ./int --int 3 // id = &{3}
float64
package main import ( "fmt" "github.com/guonaihong/clop" ) type Float64Demo struct { Float64 float64 `clop:"short;long" usage:"float64"` } func main() { fd := &Float64Demo{} clop.Bind(fd) fmt.Printf("fd = %v\n", fd) } // ./float64 -f 3.14 // fd = &{3.14} // ./float64 --float64 3.14 // fd = &{3.14}
duration
package main import ( "fmt" "time" "github.com/guonaihong/clop" ) type DurationDemo struct { Duration time.Duration `clop:"short;long" usage:"duration"` } func main() { dd := &DurationDemo{} clop.Bind(dd) fmt.Printf("dd = %v\n", dd) } // ./duration -d 1h // dd = &{1h0m0s} // ./duration --duration 1h // dd = &{1h0m0s}
string
package main import ( "fmt" "github.com/guonaihong/clop" ) type StringDemo struct { String string `clop:"short;long" usage:"string"` } func main() { s := &StringDemo{} clop.Bind(s) fmt.Printf("s = %v\n", s) } // ./string --string hello // s = &{hello} // ./string -s hello // s = &{hello}
array
similar to curl command
package main import ( "fmt" "github.com/guonaihong/clop" ) type ArrayDemo struct { Header []string `clop:"-H;long" usage:"header"` } func main() { h := &ArrayDemo{} clop.Bind(h) fmt.Printf("h = %v\n", h) } // ./array -H session:sid --header token:my // h = &{[session:sid token:my]}
similar to join command
加上greedy属性,就支持数组贪婪写法。类似join命令。
package main import ( "fmt" "github.com/guonaihong/clop" ) type test struct { A []int `clop:"-a;greedy" usage:"test array"` B int `clop:"-b" usage:"test int"` } func main() { a := &test{} clop.Bind(a) fmt.Printf("%#v\n", a) } /* 运行 ./use_array -a 12 34 56 78 -b 100 输出 &main.test{A:[]int{12, 34, 56, 78}, B:100} */
required flag
package main import ( "github.com/guonaihong/clop" ) type curl struct { Url string `clop:"-u; --url" usage:"url" valid:"required"` } func main() { c := curl{} clop.Bind(&c) } // ./required // error: -u; --url must have a value! // For more information try --help
set default value
可以使用default tag设置默认值,普通类型直接写,复合类型用json表示
package main import ( "fmt" "github.com/guonaihong/clop" ) type defaultExample struct { Int int `default:"1"` Float64 float64 `default:"3.64"` Float32 float32 `default:"3.32"` SliceString []string `default:"[\"one\", \"two\"]"` SliceInt []int `default:"[1,2,3,4,5]"` SliceFloat64 []float64 `default:"[1.1,2.2,3.3,4.4,5.5]"` } func main() { de := defaultExample{} clop.Bind(&de) fmt.Printf("%v\n", de) } // run // ./use_def // output: // {1 3.64 3.32 [one two] [1 2 3 4 5] [1.1 2.2 3.3 4.4 5.5]}
Support environment variables
// file name use_env.go package main import ( "fmt" "github.com/guonaihong/clop" ) type env struct { OmpNumThread string `clop:"env=omp_num_thread" usage:"omp num thread"` Path string `clop:"env=XPATH" usage:"xpath"` Max int `clop:"env=MAX" usage:"max thread"` } func main() { e := env{} clop.Bind(&e) fmt.Printf("%#v\n", e) } // run // env XPATH=`pwd` omp_num_thread=3 MAX=4 ./use_env // output // main.env{OmpNumThread:"3", Path:"/home/guo", Max:4}
subcommand
package main import ( "fmt" "github.com/guonaihong/clop" ) type add struct { All bool `clop:"-A; --all" usage:"add changes from all tracked and untracked files"` Force bool `clop:"-f; --force" usage:"allow adding otherwise ignored files"` Pathspec []string `clop:"args=pathspec"` } type mv struct { Force bool `clop:"-f; --force" usage:"allow adding otherwise ignored files"` } type git struct { Add add `clop:"subcommand=add" usage:"Add file contents to the index"` Mv mv `clop:"subcommand=mv" usage:"Move or rename a file, a directory, or a symlink"` } func main() { g := git{} clop.Bind(&g) fmt.Printf("git:%#v\n", g) fmt.Printf("git:set mv(%t) or set add(%t)\n", clop.IsSetSubcommand("mv"), clop.IsSetSubcommand("add")) switch { case clop.IsSetSubcommand("mv"): fmt.Printf("subcommand mv\n") case clop.IsSetSubcommand("add"): fmt.Printf("subcommand add\n") } } // run: // ./git add -f // output: // git:main.git{Add:main.add{All:false, Force:true, Pathspec:[]string(nil)}, Mv:main.mv{Force:false}} // git:set mv(false) or set add(true) // subcommand add
Get command priority
package main import ( "fmt" "github.com/guonaihong/clop" ) type cat struct { NumberNonblank bool `clop:"-b;--number-nonblank" usage:"number nonempty output lines, overrides"` ShowEnds bool `clop:"-E;--show-ends" usage:"display $ at end of each line"` } func main() { c := cat{} clop.Bind(&c) if clop.GetIndex("number-nonblank") < clop.GetIndex("show-ends") { fmt.Printf("cat -b -E\n") } else { fmt.Printf("cat -E -b \n") } } // cat -be // 输出 cat -b -E // cat -Eb // 输出 cat -E -b
Can only be set once
指定选项只能被设置一次,如果命令行选项,使用两次则会报错。
package main import ( "github.com/guonaihong/clop" ) type Once struct { Debug bool `clop:"-d; --debug; once" usage:"debug mode"` } func main() { o := Once{} clop.Bind(&o) } /* ./once -debug -debug error: The argument '-d' was provided more than once, but cannot be used multiple times For more information try --help */
quick write
快速写法,通过使用固定的short, long tag生成短,长选项。可以和 cat 例子直观比较下。命令行选项越多,越能节约时间,提升效率。
package main import ( "fmt" "github.com/guonaihong/clop" ) type cat struct { NumberNonblank bool `clop:"-c;long" usage:"number nonempty output lines, overrides"` ShowEnds bool `clop:"-E;long" usage:"display $ at end of each line"` Number bool `clop:"-n;long" usage:"number all output lines"` SqueezeBlank bool `clop:"-s;long" usage:"suppress repeated empty output lines"` ShowTab bool `clop:"-T;long" usage:"display TAB characters as ^I"` ShowNonprinting bool `clop:"-v;long" 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) }
Implementing linux command options
cat
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) } /* Usage: ./cat [Flags] <files> Flags: -E,--show-ends display $ at end of each line -T,--show-tabs display TAB characters as ^I -c,--number-nonblank number nonempty output lines, overrides -n,--number number all output lines -s,--squeeze-blank suppress repeated empty output lines -v,--show-nonprinting use ^ and M- notation, except for LFD and TAB Args: <files> */
以上就是本文的全部内容,希望本文的内容对大家的学习或者工作能带来一定的帮助,也希望大家多多支持 码农网
猜你喜欢:- jmap 命令的实现原理解析
- go语言 从命令行获取参数解析
- 熔断器 Hystrix 源码解析 —— 执行命令方式
- Go语言命令解析学习 golang开发学习
- 如何用 scrapy 命令行访问、解析网页数据
- apkanalyzer(3)-走读dex/arsc解析命令
本站部分资源来源于网络,本站转载出于传递更多信息之目的,版权归原作者或者来源机构所有,如转载稿涉及版权问题,请联系我们。
Node.js in Action
Mike Cantelon、Marc Harter、TJ Holowaychuk、Nathan Rajlich / Manning Publications / 2013-11-25 / USD 44.99
* Simplifies web application development * Outlines valuable online resources * Teaches Node.js from the ground up Node.js is an elegant server-side JavaScript development environment perfect for scal......一起来看看 《Node.js in Action》 这本书的介绍吧!