Autocompletion for zsh

[ngoldbaum]

This turns on bash compatibility mode for zsh's autocompletion, allowing zsh users to use the bash completion script included with ipython.

[ngoldbaum]

This is my first time submitting a patch to ipython - please let me know if I've missed something or if I'm not following the contribution guidelines somehow.

[bfroehle]

No, it looks fine. Only nitpick would be that the body of the if statement should be indented.

I haven't seen a definitive suggestion for how to load and call bashcompinit. In particular, I've seen a lot of variation in the flags to autoload, like "-U +X", "-Uz", etc. The zshbuiltins man page wasn't very enlightening to me. Perhaps you can chime in?

Also are there any bugs in the autocomplete after enabling it?

[ngoldbaum]

Thanks for the suggestion about indentation. It should be fixed now.

I'm no zsh expert and the zshbuiltins page wasn't very enlightening for me either. This bit of code was gleaned from looking at a blog post (which I can't seem to find at the moment). Comparing google results, It seems that autoload -Uz is a more standard way of invoking bashcompinit.

With this change, the completions look identical in bash and zsh.

[ellisonbg]

@minrk @ivanov should we have @ngoldbaum clean up the commit log on this PR?

[minrk]

I don't see any reason to, merge seems fine to me.

[ngoldbaum]

Commit log should be cleaned up. Thanks for the suggestion - first time using git as well, I usually stick to hg!

[ellisonbg]

Looks good merging. Thanks!