[arghimonmobile]

You'd probably really like Magit mode for Emacs then. What you're describing with interactive add becomes trivial since you can stage parts of the diff by selecting them in a region. I can hardly live without Magit these days. Bonus is that it even works on remote hosts via tramp. </emacs plug>

[roblabla]

<vim plug>With the vim-gitgutter plugin installed, you can dynamically add/remove/undo hunks without even leaving the editor[0]. I use this instead of `git add -p` nowadays</vim plug>

[0]: https://github.com/airblade/vim-gitgutter#getting-started

[hacker42]

<spacemacs plug />

[throwanem]

I can enthusiastically second this recommendation. If you use Emacs and Git, but have not yet tried Magit, you are missing out.