syntastic/syntax_checkers/go/gofmt.vim

"============================================================================
"File:        gofmt.vim
"Description: Check go syntax using 'gofmt -l'
"Maintainer:  Brandon Thomson <bt@brandonthomson.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.
"
" This syntax checker does not reformat your source code.
" Use a BufWritePre autocommand to that end:
"   autocmd FileType go autocmd BufWritePre <buffer> Fmt
"============================================================================
if exists("g:loaded_syntastic_go_gofmt_checker")
    finish
endif
let g:loaded_syntastic_go_gofmt_checker=1

function! SyntaxCheckers_go_gofmt_IsAvailable()
    return executable('gofmt')
endfunction

function! SyntaxCheckers_go_gofmt_GetLocList()
    let makeprg = syntastic#makeprg#build({
        \ 'exe': 'gofmt',
        \ 'args': '-l',
        \ 'tail': '1>' . syntastic#util#DevNull(),
        \ 'filetype': 'go',
        \ 'subchecker': 'gofmt' })

    let errorformat = '%f:%l:%c: %m,%-G%.%#'

    return SyntasticMake({
        \ 'makeprg': makeprg,
        \ 'errorformat': errorformat,
        \ 'defaults': {'type': 'e'} })
endfunction

call g:SyntasticRegistry.CreateAndRegisterChecker({
    \ 'filetype': 'go',
    \ 'name': 'gofmt'})