如何使用readline建议带有制表符补全的文件? [英] How to suggest files with tab completion using readline?
问题描述
在Bash shell中,我可以使用制表符补全来使用建议的文件名和目录名.如何使用nodejs和 readline 实现此目标?
Within the Bash shell, I can use tab-completion to use suggest file and directory names. How can I achieve this with nodejs and readline?
示例:
-
/<Tab>
应建议/root/
,/bin/
等 -
/et<Tab>
应该完成到/etc/
.
假设当前目录中存在这样的文件, -
fo<Tab>
应该完成到foobar
.
/<Tab>
should suggest/root/
,/bin/
, etc./et<Tab>
should complete to/etc/
.fo<Tab>
should complete tofoobar
assuming such a file exists in the current directory.
我当时正在考虑使用遍历(模式search_term.replace(/[?*]/g, "\\$&") + "*"
),但是也许我忽略了一个库吗?
I was thinking of using globbing (pattern search_term.replace(/[?*]/g, "\\$&") + "*"
), but is there maybe a library that I have overlooked?
这是我目前使用glob的方法,在使用//<Tab>
时会损坏,因为它返回规范化的名称,并且可能还有其他奇怪之处:</p>
This is my current approach using glob, it is broken when using //<Tab>
as it returns the canonicalized name and has possibly some other oddities:
function command_completion(line) {
var hits;
// likely broken, one does not simply escape a glob char
var pat = line.replace(/[?*]/g, "\\$&") + "*";
// depends: glob >= 3.0
var glob = require("glob").sync;
hits = glob(pat, {
silent: true,
nobrace: true,
noglobstar: true,
noext: true,
nocomment: true,
nonegate: true
});
return [hits, line];
}
var readline = require("readline");
rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
completer: command_completion
});
rl.prompt();
推荐答案
也许您可以看一下readdir: https://www.npmjs.com/package/readdir
Maybe you could take a look on readdir: https://www.npmjs.com/package/readdir
只需阅读用户在其上进行制表的目录,然后将用户输入与该目录中每个文件的开头进行比较,如果文件名匹配,则将其显示给用户.像这样:
Just read the directory on which the user is making a tab, then compare the user input with the beginning of each file on the directory and if a filename match, display it to the user. Something like:
var readDir = require('readdir');
function strncmp(str1, str2, lgth) {
var s1 = (str1 + '')
.substr(0, lgth);
var s2 = (str2 + '')
.substr(0, lgth);
return ((s1 == s2) ? 0 : ((s1 > s2) ? 1 : -1));
}
var userInput = // get user input;
var path = // get the path;
readDir.read(path, [*], function(err, files) {
for (var i = 0; i < files.length; i++)
if (strncmp(files[i], userInput, userInput.length) == 0)
console.log(files[i]);
});
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