Coffee Script in ERB

eruby-coffee.vim

autocmd BufNewFile,BufRead *.erb set filetype=eruby-coffee

eruby-coffee.vim

" Better indent support for ERB by making it possible to indent CoffeeSCript sections
" as well.
if exists("b:did_indent")
  finish
endif

" This script pulls in the default indent/coffee.vim with the :runtime command
" which could re-run this script recursively unless we catch that:
if exists('s:doing_indent_inits')
  finish
endif
let s:doing_indent_inits = 1
runtime! indent/eruby.vim
unlet b:did_indent
runtime! indent/coffee.vim
unlet s:doing_indent_inits

function! GetERBCoffeeIndent(lnum)
  let eruby_ind = GetErubyIndent(a:lnum)
  let coffee_ind = GetCoffeeIndent()
  if eruby_ind > -1
    let coffee = "<%\s*coffee_script.*do\s*%>"
    if 0 < searchpair(coffee, '', '<%\s*end\s*%>', 'nWb') || 0 < searchpair(coffee, '', '<%\s*end\s*%>', 'nW'))
      let coffee_ind = GetCoffeeIndent()
    endif
    return eruby_ind
  endif
  return -1
endfunction

setlocal indentexpr=GetCoffeeIndent(v:lnum)

eruby-coffee.vim

let b:current_syntax = ''
unlet b:current_syntax
runtime! syntax/eruby.vim

let b:current_syntax = ''
unlet b:current_syntax
syntax include @eRuby syntax/eruby.vim

let b:current_syntax = ''
unlet b:current_syntax
syntax include @Coffee syntax/coffee.vim
syntax region coffeeCode matchgroup=Snip start=/<%\s*coffee_script.*do\s*%>/ end=/<%\s*end\s*%>/ containedin=@eRuby contains=@Coffee

hi link Snip SpecialComment
let b:current_syntax = 'eruby-coffee'