Metro crashes on git pull sometimes

[asklar]

Do you want to request a feature or report a bug?
bug

What is the current behavior?
sometimes refreshing my branch will cause metro to crash with this error

If the current behavior is a bug, please provide the steps to reproduce and a minimal repository on GitHub that we can yarn install and yarn test.
https://github.com/microsoft/react-native-windows/
(hit this with packages/playground)

What is the expected behavior?
no crash
Please provide your exact Metro configuration and mention your Metro, node, yarn/npm version and operating system.
"metro": "^0.58.0",
"metro-config": "^0.58.0",
"metro-core": "^0.58.0",
"metro-react-native-babel-transformer": "^0.58.0",
Windows 10 latest

[papadi]

Same here.

[motiz88]

Hey @asklar @papadi, sorry for the delayed response here. In the long run we are thinking of replacing NodeWatcher with something else on Windows that is more reliable. In the meantime, you may be able to get the file watcher to ignore these problem paths by adding the .git directory and .TMP files to the blockList setting in metro.config.js.

[yume-chan]

blockList's default value already inlcudes \.git\

metro/packages/metro-file-map/src/index.js

Lines 145 to 147 in 5d4e7cc

	const VCS_DIRECTORIES = ['.git', '.hg']
	.map(vcs => escapePathForRegex(path.sep + vcs + path.sep))
	.join('|');

But it doesn't work, because anymatch package only accepts Linux path separaters (even on Windows)