windows平台React-Native启动时Watchman was not found

在windows平台进行react-native开发，在命令行输入react-native start 或者npm start时，发现服务启动不起来，打出如下错误日志：

Watchman: Watchman was not found in PATH. See https://facebook.github.io/watchman/docs/install.html for installation instructions ERROR Watchman was not found in PATH. See https://facebook.github.io/watchman/docs/install.html for installation instructions {"code":"ENOENT","errno":"ENOENT","syscall":"spawn watchman","path":"watchman","spawnargs":["--no-pretty","get-sockname"]} Error: Watchman was not found in PATH. See https://facebook.github.io/watchman/docs/install.html for installation instructions at exports._errnoException (util.js:874:11) at Process.ChildProcess._handle.onexit (internal/child_process.js:178:32) at onErrorNT (internal/child_process.js:344:16) at doNTCallback2 (node.js:441:9) at process._tickCallback (node.js:355:17) at Function.Module.runMain (module.js:469:11) at startup (node.js:136:18) at node.js:963:3

在网上查找一番，发现windows平台不须要watchman。 也有安装了cygwin，致使系统中有linux命令环境，启动时误认的说法，但我本机中并无cygwin环境。

后来尝试卸载watchman:npm uninstall -g watchman

再运行：react-native start

成功启动