Generate and HTML reports with the coverage report generated/calculated

As a customer of this Github Action, I would love to be able to generate a visual/HTML report with the coverage of my project, so I can easily inspect what’s the status of my testing strategy.

As an example, we can see how genhtml from lcov works:

genhtml ./coverage/lcov.info -o coverage

Thank you! 💙

[mtwichel]

Could a strategy to tackle this problem be?:

• Build a template using Handlebars.js
• Pull data from lcov-parse, as input for the template
• Write the newly created pages to .html files
• Either write a comment on the PR with the generated files, or add them as artifacts in github actions

I think this might be an easy and simple way to generate the files we need without involving some big overhead from a framework.

EDIT: This commit shows a proof of concept that might be easier than explaining it, and here’s a screenshot of the results:

[yeikel16]

I’d like to recommend coverde, a CLI written in Dart that allows you to manipulate coverage and is actually much easier to use than lcov. It would be great to be able to integrate the use of this. It would only be necessary to install it with dart pub global activate coverde and use the coverde report -l command to generate the html.