Regenerate ctags in vim using RVM

I have the following code in my .vimrc:

map <Leader>rt :!ctags --extra=+f -R *<CR><CR>

This generates 开发者_C百科ctags for my current directory.

I'm using RVM, I'm working on different projects, with different ruby versions (trough RVM gemsets.

I have a different $GEM_PATH per project, and I want to generate the ctags for the gems in this path too.

How should the above line be to test if the $GEM_PATH variable is set, and processing these paths too?

Or better still how to check if I have an .rvmrc file, and generate ctags depending of the contents of this file?

I use bundler to manage gems, so I use

ctags -R `bundle show rails`/../*

to get the tags for gems.

If you're using rvm, you can use rvm gemdir. For example, this is what I'm using:

map <Leader>rt :!ctags --extra=+f --exclude=.git --exclude=log -R * `rvm gemdir`/gems/*<CR><CR>

This will always use the gem directory in your current rvm gemset.

Generic version for tagging all the installed gems (it takes a while):

map <silent><Leader>rt :!ctags --extra=+f --exclude=.git --exclude=log -R * `gem environment gemdir`/gems/*<CR><CR>

If you want to just tag bundled gems (much faster):

map <silent> <Leader>rt :!bundle list --paths=true \| xargs ctags --extra=+f --exclude=.git --exclude=log -R *<CR><CR> 

This works well for me:

map <Leader>rt :!/usr/local/bin/ctags --language-force=ruby --exclude=.git --exclude=log -R * `bundle show --paths`

Adding --language-force=ruby in order to reduce the size of tags file and make it clean.

That is what I use:

ctags -R --exclude=.git --exclude=log * $(rvm gemdir)

I'm not sure if this will help you in your situation by I do know of a quirk on macs that require me to run sudo mv /etc/zshenv /etc/zprofile every time I install vim to get exuberant with Rails.vim (Rtags) to work. For more see this post:

$PATH variable not properly set in gvim/MacVim when it is opened from the finder