add option to propose from source

Author: bhcleek

autoload/go/complete.vim

@@ -14,6 +14,10 @@ function! s:gocodeCommand(cmd, args) abort
     let cmd = extend(cmd, ['-builtin'])
   endif
 
+  if go#config#GocodeProposeSource()
+    let cmd = extend(cmd, ['-source'])
+  endif
+
   let cmd = extend(cmd, [a:cmd])
   let cmd = extend(cmd, a:args)
 

autoload/go/config.vim

@@ -144,6 +144,10 @@ function! go#config#GocodeProposeBuiltins() abort
   return get(g:, 'go_gocode_propose_builtins', 1)
 endfunction
 
+function! go#config#GocodeProposeSource() abort
+  return get(g:, 'go_gocode_propose_source', 0)
+endfunction
+
 function! go#config#EchoCommandInfo() abort
   return get(g:, 'go_echo_command_info', 1)
 endfunction

doc/vim-go.txt

@@ -1550,6 +1550,14 @@ Specifies whether `gocode` should add built-in types, functions and constants
 to an autocompletion proposals. By default it is enabled.
 >
   let g:go_gocode_propose_builtins = 1
+<
+                                               *'g:go_gocode_propose_source'*
+
+Specifies whether `gocode` should use source files instead of binary packages
+for autocompletion proposals. By default it is disabled because it is
+currently much slower.
+>
+  let g:go_gocode_propose_source = 0
 <
                                                    *'g:go_gocode_socket_type'*