uba/src/util.js

/* util
 * @Author: Kvkens(yueming@yonyou.com)
 * @Date:   2017-5-15 00:00:00
 * @Last Modified by:   Kvkens
 * @Last Modified time: 2018-01-27 23:29:56
 */

var chalk = require("chalk");
var resolve = require("resolve");
var path = require("path");

/**
 * 获得uba的帮助信息
 */
exports.getHelp = function() {
  console.log();
  console.log(chalk.green("  Usage: uba <plugin-name>"));
  console.log();
  console.log(chalk.green("  Options:"));
  console.log();
  console.log(chalk.green("    -h, --help     output usage information"));
  console.log(chalk.green("    -v, --version  output the version number"));
  console.log();
}

/**
 * 检测node.js的指定运行版本
 * @param {*} number 版本号A
 */
exports.checkNodeVersion = function(number) {
  var currentNodeVersion = process.versions.node;
  if (currentNodeVersion.split(".")[0] < number) {
    console.error(chalk.red(`You are running Node ${currentNodeVersion}\nCreate Uba App requires Node 6 or higher. \nPlease update your version of Node.`));
    process.exit(1);
  }
}

/**
 * 根据插件名称来获得插件真实路径
 * @param {*} command 插件名
 */
exports.findPluginPath = function(command) {
  if (command && /^\w+$/.test(command)) {
    try {
      return resolve.sync("uba-" + command, {
        paths: [path.join(__dirname, "..", "node_modules")]
      });
    } catch (e) {
      console.log(e);
      console.log("  " + chalk.green(command) + " command is not installed.");
      console.log("  You can try to install it by " + chalk.blue.bold("npm install uba-" + command) + ".");
      console.log("");
    }
  }
}


/**
 * 获得uba版本
 */
exports.getVersion = function() {
  console.log(chalk.green(require("../package.json").version));
  process.exit(0);
}