Add g:go_fmt_options setting. Closes #36

doc/vim-go.txt

@@ -305,7 +305,6 @@ with |:GoPlay|. By default it's enabled. >
 
   let g:go_play_open_browser = 1
 <
-
                                                         *'g:go_fmt_autosave'*
 
 Use this option to auto |:GoFmt| on save. By default it's enabled >
@@ -318,6 +317,13 @@ Use this option to define which tool is used to gofmt. By default `goimports`
 is used >
 
   let g:go_fmt_command = "goimports"
+<
+                                                         *'g:go_fmt_options'*
+
+Use this option to add additional options to the |g:go_fmt_command|. Default
+is empty. >
+
+  let g:go_fmt_options = ''
 <
                                                    *'g:go_fmt_fail_silently'*
 

ftplugin/go/fmt.vim

@@ -46,6 +46,10 @@ if !exists('g:go_fmt_fail_silently')
     let g:go_fmt_fail_silently = 0
 endif
 
+if !exists('g:go_fmt_options')
+    let g:go_fmt_options = ''
+endif
+
 if g:go_fmt_autosave
     autocmd BufWritePre <buffer> :GoFmt
 endif
@@ -71,12 +75,14 @@ function! s:GoFormat()
     let l:curw=winsaveview()
     let l:tmpname=tempname()
     call writefile(getline(1,'$'), l:tmpname)
-    let out = system(g:go_fmt_command . " " . l:tmpname)
+
+    let command = g:go_fmt_command . ' ' . g:go_fmt_options
+    let out = system(command . " " . l:tmpname)
 
     "if there is no error on the temp file, gofmt our original file
     if v:shell_error == 0
         try | silent undojoin | catch | endtry
-        silent execute "%!" . g:go_fmt_command
+        silent execute "%!" . command
         call setqflist([]) 
     elseif g:go_fmt_fail_silently == 0 
         "otherwise get the errors and put them to quickfix window

plugin/gotools.vim

@@ -123,7 +123,7 @@ function! s:GoVet()
 endfunction
 
 " Execute the command with system() in the current files directory instead of
-" in current directory. Returns  the result. 
+" in current directory. Returns  the result.
 function! s:ExecuteInCurrentDir(cmd) abort
     let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd ' : 'cd '
     let dir = getcwd()