kit.program/argv/parser.js

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JavaScript
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2024-02-27 08:54:41 +00:00
const CmdLine = require("./CmdLine")
const CliCmdLine = require("./CliCmdLine")
const Config = require("./config")
const gConfig = new Config();
module.exports = class CliCmdParser {
constructor(name) {
// 软件名称
this.name = name
this.cmdLines = {}
this.funcs = {}
}
/**
* 声明一条命令
* @param cmdLine 命令模板
* @param info 命令说明
* @param func 响应函数
*/
addCmdLine(cmdLine, info, func) {
let cl = CmdLine.parse(cmdLine, info);
if( this.cmdLines[ cl.cmd ] ) {
throw "重复注册的命令 " + cl.cmd
}
this.cmdLines[ cl.cmd ] = cl;
if ( func ) {
this.funcs[ cl.cmd ] = func;
}
return cl;
}
/**
* 打印命令帮助
*/
help(){
let bs = ""
if( this.name ) {
bs += this.name + gConfig.crlf
}
for ( let cmd in this.cmdLines ) {
bs = bs.concat("\t")
.concat( this.cmdLines[ cmd ].line )
.concat("\t")
.concat( this.cmdLines[ cmd ].info )
.concat( gConfig.crlf );
}
return bs;
}
canEval( cliCmdLine ){
return !! this.funcs[ cliCmdLine.cmdline.cmd ];
}
async eval( cliCmdLine ){
let func = this.funcs[ cliCmdLine.cmdline.cmd ];
if ( null == func ) {
throw "没找到命令相应函数";
}
return await func( cliCmdLine );
}
parse(argv){
if ( ! argv || argv.length < 1 ) {
return null;
}
if ( argv[0].startsWith("-") ) {
throw "入参命令格式错误 : 没有入参 cmd"
}
if ( ! this.cmdLines[ argv[0] ] ) {
return null;
}
// 标记: 去除 - 之后的值
const flags = new Set([])
// 命名参数: 去除 -- 之后的值为 key之后值为 value
const params = {}
// 位置参数:值
const position = []
for (let i = 1; i < argv.length; i++ ) {
if ( argv[i].startsWith("--") ) {
if ( i + 1 == argv.length || argv[ i + 1 ].startsWith("-") ) {
throw "flag 格式错误" + argv[i];
}
params[ argv[i].substring(2) ] = argv[++i];
} else if ( argv[i].startsWith("-") ) {
flags.add( argv[i].substring(1) );
} else {
position.push( argv[i] );
}
}
let line = this.cmdLines[ argv[0] ];
// 整理
// line 是藐视
// flags, params, position 是值
return new CliCmdLine( this, line, flags, params, position);
}
}