Suggestion: NODE_PATH support in module resolution

I'm working on a large project in which we'd like to use Typescript. We use disparate directories for our JS source, relying on our NODE_PATH environment var to pull them all together. However, Typescript does not use NODE_PATH in its module resolution.

I realize that our setup differs from the typical Node project, and may be considered an edge case. However, if I were to submit a pull request that added NODE_PATH support, would it be approved?

首先调查 TypeScript 的模块解析行为，以及预期环境变量 NODE_PATH 将如何影响 Node 项目。完成的标准是就受支持的解析规则达成一致，并证明来自用户不同源目录的导入能够正确解析。