monomerge

Merge multiple json coverage files into one, then use nyc to create a merged report. Ideal for monorepos.

How to

npm add -D monomerge nyc

npx monomerge

This command will find all your coverage-final.json files into your packages/*/coverage/coverage-final.json folders.

All these files will be merged into .nyc_output/coverage.json file.

Now you can do whathever you want with this merged coverage file.

Generate a report

Just call nyc with your prefered Options

npx nyc report --reporter=html --reporter=lcov
# or via a nyc config file https://github.com/istanbuljs/nyc#configuration-files