Comment by Deejahll

I'm very happy more people are coming around to this idea, despite multiple independent discoveries. :)

Here's another project that attempts something similar: https://github.com/berdario/invewrapper

Here's a sortof-blog-post and some more discussion about the superiority of modifying a subshell rather than sourcing a bunch of janky shell-functions that modify your current shell: https://gist.github.com/datagrok/2199506