Error: Cannot find module './command' when running istanbul

Question

When running mocha with istanbul (istanbul cover _mocha) sometimes the message Error: Cannot find module './command' and I need to remove the node_modules folder and reinstall in order to make it work again.

So far I could not replicate the exact conditions of this happening, but is usually after after I ran several tests.

Mocha still works, and between my dependencies for testing (mocha,chai and istanbul) command module only appears as direct dependency in istanbul. Currently using "istanbul": "^0.4.5" and node 6.6.0

PRS · Accepted Answer · 2017-03-09 22:48:21Z

1

I have a feeling this may be due to your node_modules/.bin/ folder having files instead of the expected symlinks. This can happen by copying your repo to another directory with node_modules already installed. To fix, try this:

cd bad_repo_dir
rm -fr node_modules
cd ../good_repo_dir
cp -a node_modules ../bad_repo_dir
cd ../bad_repo_dir
npm test

This -a on the copy command tells it to duplicate attributes as well as symlinks, etc. Hope that helps!

answered Mar 9, 2017 at 22:48

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