Ubuntu and Debian store the system-installed virtualenvwrapper in
/etc/bash_completion.d/virtualenvwrapper, so that it gets automatically sourced
at startup in Bash. By not putting it somewhere in $PATH, they end up excluding
others (e.g. Zsh) that might want to use that file. Oops!
The virtualenvwrapper plugin should account for this so that Ubuntu (or Debian)
users don't end up with this message:
zsh virtualenvwrapper plugin: Cannot find virtualenvwrapper.sh. Please install with `pip install virtualenvwrapper`.
even when they have a virtualenvwrapper installed to a known location.
* removes cd override by using chpwd_functions
* removes subshell call to which by using $+commands array and
c param expansion to find in PATH
* zsh love!
Using lazy loading for virtualenvwrapper gives a mariginal speed
improvement and doesn't stop workon_cd from working. It has the
undesired effect of forcing you to call certain virtualenv commands
twice before they work (only once per shell instantiation).
