結論
command-line-argsと command-line-usageを使うといい感じになる
オプション引数の説明を表示する
src/index.js
constcommandLineUsage=require("command-line-usage");constusage=commandLineUsage([{header:"command line tool",content:"description"},{header:"Options",optionList:[{name:"str",description:"description of str"},{name:"multi",description:"ex: --multi foo --multi bar"},{name:"int",description:"default: 123"},{name:"bool",alias:"b",type:Boolean,description:"ex: -b"},],},]);console.log(usage);出力
$ node src/index.js
command line tool
description
Options
--str string description of str
--multi string ex: --multi foo --multi bar
--int string default: 123
-b, --bool ex: -bオプション引数の値を取得する
src/index.js
constcommandLineArgs=require("command-line-args");constargs=commandLineArgs([{name:"str",type:String},{name:"multi",multiple:true,type:String},{name:"bool",alias:"b",type:Boolean},{name:"int",type:Number,defaultValue:123},{name:"def",defaultOption:true},]);console.log(args);出力
$ node src/index.js --str hoge --multi foo --multi bar -b foobar
{
int: 123,
str: 'hoge',
multi: ['foo', 'bar'],
bool: true,
def: 'foobar'}