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"============================================================================
"File:        ruby.vim
"Description: Syntax checking plugin for syntastic.vim
"Maintainer:  Martin Grenfell <martin.grenfell at gmail dot com>
"License:     This program is free software. It comes without any warranty,
"             to the extent permitted by applicable law. You can redistribute
"             it and/or modify it under the terms of the Do What The Fuck You
"             Want To Public License, Version 2, as published by Sam Hocevar.
"             See http://sam.zoy.org/wtfpl/COPYING for more details.
"
"============================================================================

if exists('g:loaded_syntastic_eruby_ruby_checker')
    finish
endif
let g:loaded_syntastic_eruby_ruby_checker = 1

let s:save_cpo = &cpo
set cpo&vim

function! SyntaxCheckers_eruby_ruby_IsAvailable() dict
    if !exists('g:syntastic_eruby_ruby_exec') && exists('g:syntastic_ruby_exec')
        let g:syntastic_eruby_ruby_exec = g:syntastic_ruby_exec
        call self.log('g:syntastic_eruby_ruby_exec =', g:syntastic_eruby_ruby_exec)
    endif
    return executable(self.getExec())
endfunction

function! SyntaxCheckers_eruby_ruby_GetLocList() dict
    if !exists('s:ruby_new')
        let s:ruby_new = syntastic#util#versionIsAtLeast(self.getVersion(), [1, 9])
    endif

    let fname = "'" . escape(expand('%', 1), "\\'") . "'"

    " TODO: encodings became useful in ruby 1.9 :)
    if s:ruby_new
        let enc = &fileencoding !=# '' ? &fileencoding : &encoding
        let encoding_spec = ', :encoding => "' . (enc ==? 'utf-8' ? 'UTF-8' : 'BINARY') . '"'
    else
        let encoding_spec = ''
    endif

    "gsub fixes issue #7, rails has it's own eruby syntax
    let makeprg =
        \ self.getExecEscaped() . ' -rerb -e ' .
        \ syntastic#util#shescape('puts ERB.new(File.read(' .
        \     fname . encoding_spec .
        \     ').gsub(''<%='',''<%''), nil, ''-'').src') .
        \ ' | ' . self.getExecEscaped() . ' -w -c'

    let errorformat = '%-G%\m%.%#warning: %\%%(possibly %\)%\?useless use of a literal in void context,'

    " filter out lines starting with ...
    " long lines are truncated and wrapped in ... %p then returns the wrong
    " column offset
    let errorformat .= '%-G%\%.%\%.%\%.%.%#,'

    let errorformat .=
        \ '%-GSyntax OK,'.
        \ '%E-:%l: syntax error\, %m,%Z%p^,'.
        \ '%W-:%l: warning: %m,'.
        \ '%Z%p^,'.
        \ '%-C%.%#'

    let env = syntastic#util#isRunningWindows() ? {} : { 'RUBYOPT': '' }

    return SyntasticMake({
        \ 'makeprg': makeprg,
        \ 'errorformat': errorformat,
        \ 'env': env,
        \ 'defaults': { 'bufnr': bufnr(''), 'vcol': 1 } })
endfunction

call g:SyntasticRegistry.CreateAndRegisterChecker({
    \ 'filetype': 'eruby',
    \ 'name': 'ruby'})

let &cpo = s:save_cpo
unlet s:save_cpo

" vim: set sw=4 sts=4 et fdm=marker: