Add vim config

vim/plugin/godoc.vim

@@ -0,0 +1,85 @@
+" Copyright 2011 The Go Authors. All rights reserved.
+" Use of this source code is governed by a BSD-style
+" license that can be found in the LICENSE file.
+"
+" godoc.vim: Vim command to see godoc.
+
+if exists("g:loaded_godoc")
+  finish
+endif
+let g:loaded_godoc = 1
+
+let s:buf_nr = -1
+let s:last_word = ''
+
+function! s:GodocView()
+  if !bufexists(s:buf_nr)
+    leftabove new
+    file `="[Godoc]"`
+    let s:buf_nr = bufnr('%')
+  elseif bufwinnr(s:buf_nr) == -1
+    leftabove split
+    execute s:buf_nr . 'buffer'
+    delete _
+  elseif bufwinnr(s:buf_nr) != bufwinnr('%')
+    execute bufwinnr(s:buf_nr) . 'wincmd w'
+  endif
+
+  setlocal filetype=godoc
+  setlocal bufhidden=delete
+  setlocal buftype=nofile
+  setlocal noswapfile
+  setlocal nobuflisted
+  setlocal modifiable
+  setlocal nocursorline
+  setlocal nocursorcolumn
+  setlocal iskeyword+=:
+  setlocal iskeyword-=-
+
+  nnoremap <buffer> <silent> K :Godoc<cr>
+
+  au BufHidden <buffer> call let <SID>buf_nr = -1
+endfunction
+
+function! s:GodocWord(word)
+  let word = a:word
+  silent! let content = system('godoc ' . word)
+  if v:shell_error || !len(content)
+    if len(s:last_word)
+      silent! let content = system('godoc ' . s:last_word.'/'.word)
+      if v:shell_error || !len(content)
+        echo 'No documentation found for "' . word . '".'
+        return
+      endif
+      let word = s:last_word.'/'.word
+    else
+      echo 'No documentation found for "' . word . '".'
+      return
+    endif
+  endif
+  let s:last_word = word
+  silent! call s:GodocView()
+  setlocal modifiable
+  silent! %d _
+  silent! put! =content
+  silent! normal gg
+  setlocal nomodifiable
+  setfiletype godoc
+endfunction
+
+function! s:Godoc(...)
+  let word = join(a:000, ' ')
+  if !len(word)
+    let word = expand('<cword>')
+  endif
+  let word = substitute(word, '[^a-zA-Z0-9\\/._~-]', '', 'g')
+  if !len(word)
+    return
+  endif
+  call s:GodocWord(word)
+endfunction
+
+command! -nargs=* -range -complete=customlist,go#complete#Package Godoc :call s:Godoc(<q-args>)
+nnoremap <silent> <Plug>(godoc-keyword) :<C-u>call <SID>Godoc('')<CR>
+
+" vim:ts=4:sw=4:et