import os from 'os';

const OS_WIN = 'win32';

// 对命令字符串进行shell转义
export function escape(arg = ''): string {
  // windows保持原样
  if (os.platform() === OS_WIN) {
    return arg;
  }
  let newArg = arg;
  if (newArg.startsWith('\'') && newArg.endsWith('\'')) {
    newArg = newArg.substring(1, newArg.length - 1);
  }
  if (/[^A-Za-z0-9_/:=-]/.test(newArg)) {
    newArg = '\'' + newArg.replace(/'/g, '\'\\\'\'') + '\'';
    newArg = newArg.replace(/^(?:'')+/g, '')  // 消除重复的单引号
      .replace(/\\'''/g, '\\\''); // 如果有两个转义单引号，则删除非转义单引号
  }
  return newArg;
}