pty-shell/dist/path_util.js

a virtual PTY shell for javaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.find_sep = find_sep;
exports.path_join = path_join;
exports.get_best_cmd = get_best_cmd;
exports.isAbsolutePath = isAbsolutePath;
function get_extname(filePath) {
    const lastDotIndex = filePath.lastIndexOf('.');
    // 如果没有找到点或文件以点开头，则没有扩展名
    if (lastDotIndex === -1 || lastDotIndex === 0) {
        return '';
    }
    // 返回从最后一个点开始到字符串结尾的部分
    return filePath.slice(lastDotIndex);
}
function find_sep(path) {
    let sep = "\\";
    for (const it of path) {
        if (it === "/" || it === "\\") {
            sep = it;
            break;
        }
    }
    return sep;
}
/**
 * windows 是 \ linux 是 /
 * @param path
 * @param filename
 * @returns {*|string}
 */
function path_join(path, filename) {
    // 先找到系统上的分隔符是啥
    let s_r = find_sep(path);
    if (filename === '.') {
        return path;
    }
    else if (filename === "..") {
        if (path.length > 1) {
            let ok = path[path.length - 1] === s_r ? 1 : 0;
            for (let i = path.length - 1 - ok; i >= 0; i--) {
                if (path[i] === s_r) {
                    return path.substring(0, i + 1);
                }
            }
        }
        return path;
    }
    if (path.endsWith(s_r) && filename.startsWith(s_r)) {
        // 前后都有 /
        return path.slice(0, -1) + filename;
    }
    else if (!path.endsWith(s_r) && !filename.startsWith(s_r)) {
        // 前后都没有 /
        return path + s_r + filename;
    }
    else {
        return path + filename;
    }
}
const exec_map = {
    ".com": 4, // 越大优先
    ".exe": 3,
    ".bat": 2,
    ".cmd": 1
};
// 获取最合适的命令 list 都是字符串内容
function get_best_cmd(list) {
    if (!list)
        return;
    let ok;
    let ok_p = 0;
    for (const item of list) {
        const v = exec_map[get_extname(item)];
        if (v !== undefined && v > ok_p) {
            ok = item;
            ok_p = v;
        }
    }
    if (ok === undefined) {
        // 选出一个最短的
        for (const item of list) {
            if (item.length > ok_p) {
                ok = item;
                ok_p = item.length;
            }
        }
    }
    return ok;
}
function isAbsolutePath(path) {
    if (typeof path !== 'string') {
        return false;
    }
    // 检查是否为 Windows 绝对路径，以盘符（如 C:）开头
    const windowsRegex = /^[a-zA-Z]:[\\\/]/;
    // 检查是否为 Unix/Linux 绝对路径，以斜杠 / 开头
    const unixRegex = /^\//;
    return windowsRegex.test(path) || unixRegex.test(path);
}
// console.log(get_best_cmd(['ab','ab.bat','ab.exe']))