Vim Tagbar is empty after installing CoffeeTags

Question

I'm having the hardest time getting CoffeeTags to run in Vim.

As the website suggests, I've installed the CoffeeTags gem and appended the configuration to my ~/.vimrc. When I open Tagbar it's empty.

Here's a screenshot summarizing the problem:

Am I missing something? I'm running Ruby 1.9.2, Vim 7.3, CoffeeScript 1.1.3, and Node.js 0.6.2. and OS X Lion.

Answer 1

It turns out that it was Ruby. As far as I can tell, CoffeeTags doesn't work in Ruby 1.9. After switching to Ruby 1.8 CoffeeTags worked flawlessly.

I verified this on OS X 10.7.2 running rvm and Arch Linux not running rvm.

Answer 2

CoffeeTags seems to generate invalid tags files for me. Whenever I tried to use tags files generated by it in vim I would get:

Error detected while processing function <SNR>19_CommandTShowTagFinder:
line    2:
E431: Format error in tags file "tags"
Before byte 156
Press ENTER or type command to continue

In the end I'm not sure how necessary it is. I added this:

--langdef=coffee
--langmap=coffee:.coffee
--regex-coffee=/(^|=[ \t])*class ([A-Za-z.]+)( extends [A-Za-z.]+)?$/\2/c,class/
--regex-coffee=/^[ \t]*(module\.)?(exports\.)?@?([A-Za-z.]+):.*[-=]>.*$/\3/f,function/
--regex-coffee=/^[ \t]*(module\.)?(exports\.)?([A-Za-z.]+)[ \t]+=.*[-=]>.*$/\3/f,function/
--regex-coffee=/^[ \t]*([A-Za-z.]+)[ \t]+=[^->\n]*$/\1/v,variable/

to my ~/.ctags file and then just used the regular exuberant-ctags utility: find . -iname '*\.coffee*' | ctags -L-

Answer 3

The most likely explanation is that your filetype is set incorrectly. Try :set filetype? in one of your coffeescript buffers. The configuration that the gem creates assumes that the filetype is set to coffee, so if that's not the case for you then it won't work. In that case add a line like this to your vimrc:

autocmd BufNewFile,BufReadPost *.coffee setfiletype coffee

Maybe I should add a note about that in an empty Tagbar window...

Answer 4

If you don't want to install ruby tagbar docs suggest: https://github.com/majutsushi/tagbar/wiki

let g:tagbar_type_coffee = {
    \ 'ctagstype' : 'coffee',
    \ 'kinds'     : [
        \ 'c:classes',
        \ 'm:methods',
        \ 'f:functions',
        \ 'v:variables',
        \ 'f:fields',
    \ ]
\ }

" Posix regular expressions for matching interesting items. Since this will 
" be passed as an environment variable, no whitespace can exist in the options
" so [:space:] is used instead of normal whitespaces.
" Adapted from: https://gist.github.com/2901844
let s:ctags_opts = '
  \ --langdef=coffee
  \ --langmap=coffee:.coffee
  \ --regex-coffee=/(^|=[ \t])*class ([A-Za-z_][A-Za-z0-9_]+\.)*([A-Za-z_][A-Za-z0-9_]+)( extends ([A-Za-z][A-Za-z0-9_.]*)+)?$/\3/c,class/
  \ --regex-coffee=/^[ \t]*(module\.)?(exports\.)?@?(([A-Za-z][A-Za-z0-9_.]*)+):.*[-=]>.*$/\3/m,method/
  \ --regex-coffee=/^[ \t]*(module\.)?(exports\.)?(([A-Za-z][A-Za-z0-9_.]*)+)[ \t]*=.*[-=]>.*$/\3/f,function/
  \ --regex-coffee=/^[ \t]*(([A-Za-z][A-Za-z0-9_.]*)+)[ \t]*=[^->\n]*$/\1/v,variable/
  \ --regex-coffee=/^[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)[ \t]*=[^->\n]*$/\1/f,field/
  \ --regex-coffee=/^[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+):[^->\n]*$/\1/f,static field/
  \ --regex-coffee=/^[ \t]*(([A-Za-z][A-Za-z0-9_.]*)+):[^->\n]*$/\1/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?/\3/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){0}/\8/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){1}/\8/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){2}/\8/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){3}/\8/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){4}/\8/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){5}/\8/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){6}/\8/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){7}/\8/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){8}/\8/f,field/
  \ --regex-coffee=/((constructor|initialize):[ \t]*\()@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?(,[ \t]*@(([A-Za-z][A-Za-z0-9_.]*)+)([ \t]*=[ \t]*[^,)]+)?){9}/\8/f,field/'

let $CTAGS = substitute(s:ctags_opts, '\v\\([nst]\)', '\\\\\1', 'g')