This issue has been bugging me for a while, and although I've taught I've found my answer through EnvWatcher, unfortunately it only works on Bash. And I use zsh.
I would like to replicate the things env-watcher does, to a lesser degree maybe, but I need to know if there is a command by which I could reset a shell to it's clean startup stage.
As for example, I'd like to have the following workflow.
source some-functions alias another-thing export SVN_EDITOR=vim RESET-ZSH # none of the above are valid any more
Is there such a built in possibility, or am I chasing butterflies?