gravity-lang/syntax_highlighting/vim/ftdetect/gravity.vim

" Copyright (c) 2014 Keith Smiley (http://keith.so)
" Permission is hereby granted, free of charge, to any person obtaining a copy
" of this software and associated documentation files (the 'Software'), to deal
" in the Software without restriction, including without limitation the rights
" to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
" copies of " the Software, and to permit persons to whom the Software is
" furnished to do so, subject to the following conditions:

" The above copyright notice and this permission notice shall be included in all
" copies or substantial portions of the Software.

" THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
" AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
" LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
" OUT OF OR IN " CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
" THE SOFTWARE.


autocmd BufNewFile,BufRead *.gravity set filetype=gravity
autocmd BufRead * call s:Gravity()
function! s:Gravity()
  if !empty(&filetype)
    return
  endif

  let line = getline(1)
  if line =~ "^#!.*gravity"
    setfiletype gravity
  endif
endfunction