This git extension is designed to be a better alternative to git add -p. The goal is to make staging whole files, as well as parts of a file, up to the line level, a breeze. See documentation for details.

$ dotnet tool install git-istage -g

$ dotnet tool install git-istage -g --add-source https://nuget.pkg.github.com/terrajobst/index.json

See documentation for details.