Use syntastic instead of pyflakes (supports a ton of more languages)

sources_non_forked/syntastic/syntax_checkers/go/go.vim

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+"============================================================================
+"File:        go.vim
+"Description: Check go syntax using 'gofmt -l' followed by 'go [build|test]'
+"Maintainer:  Kamil Kisiel <kamil@kamilkisiel.net>
+"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_go_checker")
+    finish
+endif
+let g:loaded_syntastic_go_go_checker = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_go_go_IsAvailable() dict
+    return executable('go') && executable('gofmt')
+endfunction
+
+function! SyntaxCheckers_go_go_GetLocList() dict
+    " Check with gofmt first, since `go build` and `go test` might not report
+    " syntax errors in the current file if another file with syntax error is
+    " compiled first.
+    let makeprg = self.makeprgBuild({
+        \ 'exe': 'gofmt',
+        \ 'args': '-l',
+        \ 'tail': '> ' . syntastic#util#DevNull() })
+
+    let errorformat =
+        \ '%f:%l:%c: %m,' .
+        \ '%-G%.%#'
+
+    let errors = SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat,
+        \ 'defaults': {'type': 'e'} })
+    if !empty(errors)
+        return errors
+    endif
+
+    " Test files, i.e. files with a name ending in `_test.go`, are not
+    " compiled by `go build`, therefore `go test` must be called for those.
+    if match(expand('%'), '\m_test\.go$') == -1
+        let makeprg = 'go build ' . syntastic#c#NullOutput()
+    else
+        let makeprg = 'go test -c ' . syntastic#c#NullOutput()
+    endif
+
+    let errorformat =
+        \ '%E%f:%l:%c:%m,' .
+        \ '%E%f:%l:%m,' .
+        \ '%C%\s%\+%m,' .
+        \ '%-G#%.%#'
+
+    " The go compiler needs to either be run with an import path as an
+    " argument or directly from the package directory. Since figuring out
+    " the proper import path is fickle, just cwd to the package.
+
+    let errors = SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat,
+        \ 'cwd': expand('%:p:h'),
+        \ 'defaults': {'type': 'e'} })
+
+    return errors
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'go',
+    \ 'name': 'go'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim: set et sts=4 sw=4:

sources_non_forked/syntastic/syntax_checkers/go/gofmt.vim

@@ -0,0 +1,44 @@
+"============================================================================
+"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
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_go_gofmt_GetLocList() dict
+    let makeprg = self.makeprgBuild({
+        \ 'args_after': '-l',
+        \ 'tail_after': '> ' . syntastic#util#DevNull() })
+
+    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'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim: set et sts=4 sw=4:

sources_non_forked/syntastic/syntax_checkers/go/golint.vim

@@ -0,0 +1,39 @@
+"============================================================================
+"File:        golint.vim
+"Description: Check go syntax using 'golint'
+"Maintainer:  Hiroshi Ioka <hirochachacha@gmail.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_go_golint_checker")
+    finish
+endif
+let g:loaded_syntastic_go_golint_checker = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_go_golint_GetLocList() dict
+    let makeprg = self.makeprgBuild({})
+
+    let errorformat = '%f:%l:%c: %m,%-G%.%#'
+
+    return SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat,
+        \ 'subtype': 'Style' })
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'go',
+    \ 'name': 'golint'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim: set et sts=4 sw=4:

sources_non_forked/syntastic/syntax_checkers/go/gotype.vim

@@ -0,0 +1,48 @@
+"============================================================================
+"File:        gotype.vim
+"Description: Perform syntactic and semantic checking of Go code using 'gotype'
+"Maintainer:  luz <ne.tetewi@gmail.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_go_gotype_checker")
+    finish
+endif
+let g:loaded_syntastic_go_gotype_checker = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_go_gotype_GetLocList() dict
+    let makeprg = self.getExecEscaped() . ' .'
+
+    let errorformat =
+        \ '%f:%l:%c: %m,' .
+        \ '%-G%.%#'
+
+    " gotype needs the full go package to test types properly. Just cwd to
+    " the package for the same reasons specified in go.vim ("figuring out
+    " the import path is fickle").
+
+    let errors = SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat,
+        \ 'cwd': expand('%:p:h'),
+        \ 'defaults': {'type': 'e'} })
+
+    return errors
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'go',
+    \ 'name': 'gotype'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim: set et sts=4 sw=4:

sources_non_forked/syntastic/syntax_checkers/go/govet.vim

@@ -0,0 +1,49 @@
+"============================================================================
+"File:        govet.vim
+"Description: Perform static analysis of Go code with the vet tool
+"Maintainer:  Kamil Kisiel <kamil@kamilkisiel.net>
+"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_go_govet_checker")
+    finish
+endif
+let g:loaded_syntastic_go_govet_checker = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_go_govet_IsAvailable() dict
+    return executable('go')
+endfunction
+
+function! SyntaxCheckers_go_govet_GetLocList() dict
+    let makeprg = 'go vet'
+    let errorformat = '%Evet: %.%\+: %f:%l:%c: %m,%W%f:%l: %m,%-G%.%#'
+
+    " The go compiler needs to either be run with an import path as an
+    " argument or directly from the package directory. Since figuring out
+    " the proper import path is fickle, just cwd to the package.
+
+    let errors = SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat,
+        \ 'cwd': expand('%:p:h'),
+        \ 'defaults': {'type': 'w'} })
+
+    return errors
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'go',
+    \ 'name': 'govet'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim: set et sts=4 sw=4: