@jzinfo/create-project/lib/util.js

前端项目脚手架工具

const path = require('path');
const fs = require('fs');
const crypto = require('crypto');
const execSync = require('child_process').execSync;

/**
 * 遍历给定目录下的指定文件
 * @param {String} root 根目录
 * @param {Function} filter 过滤器
 * @returns {[String]}
 */
function travelPaths(root, filter) {
    let paths = [];

    const entries = fs.readdirSync(root, { withFileTypes: true });

    let filepath;
    for (const entry of entries) {
        filepath = path.join(root, entry.name);
        if (entry.isFile() && filter(filepath)) {
            paths.push(filepath);
        } else if (entry.isDirectory()) {
            paths.push(...travelPaths(filepath, filter));
        }
    }
    return paths;
}

/**
 * 替换文件内容
 * @param filePath 文件路径
 * @param sourceRegx 正则
 * @param targetStr 目标文本
 */
function replaceFileContentSync(filePath, sourceRegx, targetStr) {
    const data = fs.readFileSync(filePath)
    let content = data.toString('utf8')
    content = content.replace(sourceRegx, targetStr)
    fs.writeFileSync(filePath, content)
}

/**
 * 检测是否是图片文件(目前 tinypng.com 只支持 png/jpg/jpeg 类型的图片)
 * @param file
 */
function isImage(file) {
    return ['.png', '.jpg', '.jpeg'].includes(path.extname(file))
}

/**
 * 计算文件md5
 * @param file
 * @returns {string}
 */
function fileHash(file) {
    const buffer = fs.readFileSync(file)
    return crypto.createHash('md5').update(buffer).digest('hex')
}

/**
 * 解析缓存
 * @param {string} cacheFile 缓存文件位置
 */
function resolveCache(cacheFile) {
    let cache = []
    if (fs.existsSync(cacheFile)) {
        const content = fs.readFileSync(cacheFile).toString('utf8')
        if (content) {
            cache.push(...JSON.parse(content))
        }
    }
    return cache
}

/**
 * 覆盖缓存
 * @param data 缓存数据
 * @param {string} cacheFile 缓存文件位置
 */
function overrideCache(data, cacheFile) {
    // 检查缓存文件是否存在
    if (!fs.existsSync(cacheFile)) {
        fs.mkdirSync(path.dirname(cacheFile), {recursive: true})
    }

    fs.writeFileSync(cacheFile, data, {flag: 'w'})
}

/**
 * 同步执行命令
 * @param cmd
 */
function execCmdSync(cmd) {
    execSync(cmd, {encoding: 'utf8', stdio: "inherit"})
}

module.exports = {
    travelPaths,
    isImage,
    fileHash,
    resolveCache,
    overrideCache,
    replaceFileContentSync,
    execCmdSync,
}