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" Vim syntax file
" Language: eRuby
" Maintainer: Tim Pope <vimNOSPAM@tpope.org>
" URL: http://vim-ruby.rubyforge.org
" Anon CVS: See above site
" Release Coordinator: Doug Kearns <dougkearns@gmail.com>

if exists("b:current_syntax")
  finish
endif

if !exists("main_syntax")
  let main_syntax = 'eruby'
endif

if !exists("g:eruby_default_subtype")
  let g:eruby_default_subtype = "html"
endif

if !exists("b:eruby_subtype") && main_syntax == 'eruby'
  let s:lines = getline(1)."\n".getline(2)."\n".getline(3)."\n".getline(4)."\n".getline(5)."\n".getline("$")
  let b:eruby_subtype = matchstr(s:lines,'eruby_subtype=\zs\w\+')
  if b:eruby_subtype == ''
    let b:eruby_subtype = matchstr(&filetype,'^eruby\.\zs\w\+')
  endif
  if b:eruby_subtype == ''
    let b:eruby_subtype = matchstr(substitute(expand("%:t"),'\c\%(\.erb\|\.eruby\|\.erubis\)\+$','',''),'\.\zs\w\+$')
  endif
  if b:eruby_subtype == 'rhtml'
    let b:eruby_subtype = 'html'
  elseif b:eruby_subtype == 'rb'
    let b:eruby_subtype = 'ruby'
  elseif b:eruby_subtype == 'yml'
    let b:eruby_subtype = 'yaml'
  elseif b:eruby_subtype == 'js'
    let b:eruby_subtype = 'javascript'
  elseif b:eruby_subtype == 'txt'
" Conventional; not a real file type
    let b:eruby_subtype = 'text'
  elseif b:eruby_subtype == ''
    let b:eruby_subtype = g:eruby_default_subtype
  endif
endif

if !exists("b:eruby_nest_level")
  let b:eruby_nest_level = strlen(substitute(substitute(substitute(expand("%:t"),'@','','g'),'\c\.\%(erb\|rhtml\)\>','@','g'),'[^@]','','g'))
endif
if !b:eruby_nest_level
  let b:eruby_nest_level = 1
endif

if exists("b:eruby_subtype") && b:eruby_subtype != ''
  exe "runtime! syntax/".b:eruby_subtype.".vim"
  unlet! b:current_syntax
endif
syn include @rubyTop syntax/ruby.vim

syn cluster erubyRegions contains=erubyOneLiner,erubyBlock,erubyExpression,erubyComment

exe 'syn region erubyOneLiner matchgroup=erubyDelimiter start="^%\{1,'.b:eruby_nest_level.'\}%\@!" end="$" contains=@rubyTop containedin=ALLBUT,@erubyRegions keepend oneline'
exe 'syn region erubyBlock matchgroup=erubyDelimiter start="<%\{1,'.b:eruby_nest_level.'\}%\@!-\=" end="[=-]\=%\@<!%\{1,'.b:eruby_nest_level.'\}>" contains=@rubyTop containedin=ALLBUT,@erubyRegions keepend'
exe 'syn region erubyExpression matchgroup=erubyDelimiter start="<%\{1,'.b:eruby_nest_level.'\}=\{1,4}" end="[=-]\=%\@<!%\{1,'.b:eruby_nest_level.'\}>" contains=@rubyTop containedin=ALLBUT,@erubyRegions keepend'
exe 'syn region erubyComment matchgroup=erubyDelimiter start="<%\{1,'.b:eruby_nest_level.'\}#" end="%\@<!%\{1,'.b:eruby_nest_level.'\}>" contains=rubyTodo,@Spell containedin=ALLBUT,@erubyRegions keepend'

" Define the default highlighting.

hi def link erubyDelimiter PreProc
hi def link erubyComment Comment

let b:current_syntax = 'eruby'

if main_syntax == 'eruby'
  unlet main_syntax
endif

" vim: nowrap sw=2 sts=2 ts=8:
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