Where can I find the source code of gitk?

Question

gitk seems to have very nice interface design and whatnot. I really want to explore its source code. So where can I find it?

By gitk, I mean the one to view the repository history of git.

Answer 1

gitk lives in a subfolder of git's official repository.

It's written in wish/Tcl. Its folder (at time of writing) can be found at https://github.com/git/git/blob/master/gitk-git, mostly contained in a single file called gitk.