me-module-utils/es/utils.js

Me Module utils

import { find, isNumber, isString } from 'lodash';
import chalk from 'chalk';
import fs from 'fs';
import relative from 'relative';
const NODE_ENV = process.env.NODE_ENV;
/**
 * 判断是否是me的模块
 *
 * @param {string} code 代码
 * @return {boolean}
 */

export function isMeModule(code) {
  if (!isString(code)) {
    return false;
  }

  return code.includes('me.provide') || code.includes('me.require');
}
/**
 * Transform:  app-module-name
 *         =>  app_module_name
 *
 * @param {string} name 变量名
 * @returns {string}
 */

export function normalizeVariableName(name) {
  if (!name) {
    return '';
  }

  name = isNumber(name) ? String(name) : name;

  if (!isString(name)) {
    throw new Error('Cannot normalize none String/Number type');
  }

  return name.replace(/-/g, '_').replace(/\./, '_');
}
/**
 * 读取文件
 *
 * @param {string} path 文件路径
 * @param {boolean} enableDebug 是否启用调试(打印日志)
 * @returns {string} 文件内容
 */

export function safeReadFileSync(path, enableDebug = false) {
  let content = '';

  try {
    content = fs.readFileSync(path, 'UTF8');
  } catch (ex) {
    if (enableDebug) {
      console.log(chalk`{yellow Could not find file: ${path}}`);
    }
  }

  return content;
}
/**
 * 获取模块中所有export的变量名`
 *
 * @param {string} str js脚本内容
 * @returns {string[]}
 */

export function getMatchedExportsName(str) {
  const MATCH_EXPORTS_VARIABLE_REGEX = /exports\.([0-9a-zA-Z_$]+)\s*=[^=]/g;
  let match;
  let matchedName = new Set();

  while ((match = MATCH_EXPORTS_VARIABLE_REGEX.exec(str)) !== null) {
    matchedName.add(match[1]);
  }

  return Array.from(matchedName);
}
/**
 * 计算 `require` 时，两个文件的相对路径
 *
 * @param {string} from 调用 `require` 的文件路径
 * @param {string} to 被 `require` 的文件路径
 * @returns {string}
 */

export function relativeRequirePath(from, to) {
  const rp = relative(from, to).replace(/\.js$/, ''); // 如果在当前路径下，加上 `./`

  return !rp.startsWith('.') ? `./${rp}` : rp;
}