create-bfe-cttq/packages/cli/TemplateManager.js

CTTQ大前端脚手架项目

/**
 * 模版库管理工具
 */
const fs = require('fs-extra');
const path = require('path');
const { downloadTemplate, removeDirectory } = require("./util/downloadTemplate");

const TemplatePath = ".template";
const single = "single"
module.exports = class TemplateManager {
    /**
     * 单例
     */
    static get instace () {
        if (this[single]) {
            return this.single
        }
        return this[single] = new this() // 如果没有值就new 构造函数
    }
    /**
     * 构造器
     * @param {*} context 项目上下文路径地址
     * @param {*} version 模版库的版本号
     * @returns 实例对象
     */
    constructor(context, version) {
        const sourceClass = this.constructor;
        if (sourceClass[single]) {
            return sourceClass[single]
        }
        this.context = context;
        this.version = version;
        this.realVersion = "";

        sourceClass[single] = this
    }
    /**
     * 模版库本地下载地址
     * @returns 地址
     */
    rootPath() {
        let rootPath = path.resolve(__dirname, TemplatePath);
        fs.ensureDirSync(rootPath);
        return rootPath;
    }
    /**
     * 下载模版库
     */
    async download() {
        let url = `direct:https://gitlab.cttq.com/bfe-cli/cttq-template/-/archive/${this.version}/cttq-template-${this.version}.zip`
        await downloadTemplate(url, this.rootPath(), false);
        // 获取版本信息
        let realVersionPath = path.resolve(this.rootPath(), "metadata.json");
        if (fs.existsSync(realVersionPath)) {
            let metadata = JSON.parse(fs.readFileSync(realVersionPath, "utf-8") || "{}");
            if (metadata.version) {
                this.realVersion = metadata.version;
            } else {
                this.realVersion = this.version;
            }
        }
    }
    /**
     * 获取具体模块的地址
     * @param {*} templatePath 模块名称
     * @returns 路径
     */
    pathAt(templatePath) {
        return path.resolve(this.rootPath(), templatePath);
    }
    /**
     * 删除模版库
     */
    delete() {
        removeDirectory(this.rootPath());
    }
}