I investigated more into this and found out that modern zsh has a bash-compat layer already present. So the fix is to add two lines to ~/.zshrc. I can add it to quickly FAQ when it will be created :)
Indeed this should be easy as you saw, all the logic is in Quickly (it was on my TODO list)
Do you want to work on that? It's been a long time I didn't use zsh and if you know how it shell completion works for it, this should be "quickly" done looking at bash_completion existing file :-)
It's still time to include that before 0.4 to be released!
As far as I understand there's no easy way to install Quickly autocompletion functions into zsh without rewriting from bash to zsh system. I don't think the challenge is worth the effort because it's very easy to just add:
===========
autoload -Uz bashcompinit
bashcompinit
source /etc/bash_completion.d/quickly
===========
to $HOME/.zshrc and get the autocompletion for free via zsh's bash compatibility layer (that's bashcompinit). Unfortunately, the users will have to do it themselves. I suggest that we document it somewhere.
Not so sure, in fact I made some research and it seems it's possible: reprepro has one. I've pastebinit there: http://paste.ubuntu.com/388234/
This is one more more complicated than quickly's one, bit still can be helpful to setup one. It should be installed in /usr/local/share/zsh/site-functions/ (I can handle that part if you don't know how to do it)
Being able to port the bash completion script easily to other system was my first reason to have all the shell completion logic into quickly itself :)
Do you want to have a look to that? I think it will be better than changing things in zshrc for every zsh user and would be a great first Quickly contribution!
I investigated more into this and found out that modern zsh has a bash-compat layer already present. So the fix is to add two lines to ~/.zshrc. I can add it to quickly FAQ when it will be created :)