命令行自动完成（二级）,带询问

nodejs_cli_autocomplete.js

var rl = require('readline');

// 一级提示
var completionsCMD = ["help","deploy","compress","console"];
var completionsFILES = ["abc.js","bca.js","cba.js"];

var rli = rl.createInterface(process.stdin,process.stdout,function(line){
    // excute when Tab pressed
    // only process the last one 
    _line = line;//for restore
    
    line = line.trim().replace(/\s{2,}/g,' ');
    
    var words = line.split(" ");

    var last = words[words.length - 1];
    var pre = _line.slice(0,_line.lastIndexOf(last));

    var re = new RegExp("^"+last);

    var completions = words.length > 1 ? completionsFILES : completionsCMD;

    var result = [];
    completions.forEach(function(i){
	if(re.test(i)){
	    result.push(pre+i);
	}
    });

    // console.log("completions:",completions," ; last:",last," ; result:",result,"\n");

    return [result,_line];
});

rli.setPrompt(">");
rli.prompt();

process.stdin.resume();

rli.on("SIGINT",function(){
    rli.close();
});
rli.addListener("line",function(cmd){
    //读取命令字符，根据cmd进行相关操作
    rli.question(questionMSG,function(){
	console.log("s:",arguments[0],"\n");
	var s = arguments[0].trim();
	if(s != 'y' && s != "n"){
	    rli.question(questionMSG+'(please type "y" or "n") ',arguments.callee);
	}else{
	    console.log("yes you did it !\n");
	    rli.prompt();
	}
    });
    //操作完成后，显示提示符
    rli.prompt();
});

var questionMSG = 'are u ok? y/n ';
function question(q,handler){
    rli.question(q,questionHandle)
}
function questionHandle(s){
    if(s != 'y' || s != "n"){
	question(questionMSG+'(please type "y" or "n")');
    }
}

rli.addListener("close",function(){
    process.stdin.destroy();
});