Add support for emacs style tags.

[sathlan]

Hi,

This add emacs support, by creating a unique tags file in the current directory collecting the tags from all the gems. Delete the TAGS file if it exists.

Regards,

[roman]

+1 on this one

[tpope]

I don't really get the value of having a blob of tags for every gem on the system. Isn't everyone using Bundler now?

[roman]

Well, actually, I was using this just for reading library source code more easily, not involved in a ruby project just now :-)

[sathlan]

Hi,

I use it in rvm/bundler environment. Doing gem ctags -e make me a nice TAGS file exploitable by emacs to lookup function in all the gems involved. It's very useful to read source code as roman pointed out. It's the equivalent of the "Vim Tips" part of the documentation but for emacs.

[flooose]

+1 on emacs support. Question for me is if you're not happy about this implementation, how would you like to see it? Config file? I'd be happy to help.

[tpope]

I could see customizing the arguments passed to ctags in .gemrc. If anyone's into that, open an issue (or better, a pull request, since I'm probably not going to implement it myself).

I'm not going to add support for creating a giant tags file. It only makes the slightest bit of sense if you're using isolated gemsets, and even then that's a crude axe to swing compared to something Bundler related.