Method add

src/core/services/plugin.ts:138–169

* 添加插件库

(pluginName: string, npmConfig: any = {})

   * 添加插件库
   */
  public add(pluginName: string, npmConfig: any = {}) {
    if (this.has(pluginName)) {
      throw new HttpError(409, '该插件已存在');
    }
    return new Promise((resolve, reject) => {
      const install = () => {
        npm.commands.install([pluginName, this.pluginInstallDir], async (err: any) => {
          if (err) {
            if (err.code === 'E404') {
              return reject(Error(`插件不存在 ${err.uri}`));
            }
            return reject(err);
          }
          const plugins = [
            ...this.getPlugins(),
            {
              name: pluginName,
              version: await this.getPluginVersion(pluginName),
              registry: npmConfig.registry || npm.config.get('registry'),
            },
          ];
          this.setPlugins(plugins);
          return resolve(plugins);
        });
      };
      npmConfig = Object.assign({}, npmConfig, {
        loglevel: 'silent',
        prefix: this.pluginInstallDir,
      });
      this.loadNpmConfig(npmConfig, install);
    });
  }

  public update(pluginName: string) {
    if (!this.has(pluginName)) {