node 获取路径

1. child::__dirname 文件所在目录的绝对路径
2. child::__filename 文件的绝对路径
3. child::CWD() node运行路径

实例:

PS D:\3000file\3700project\Code> ts-node "d:\3000file\3700project\Code\TypeScript\Test\test.ts"
__dirname:    d:\3000file\3700project\Code\TypeScript\Test
CWD():        D:\3000file\3700project\Code
__filename:   d:\3000file\3700project\Code\TypeScript\Test\test.ts