From d2a45dbf0831e6570cc6c958f3ed8c5c3fd56dbc Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Thu, 18 Aug 2011 11:50:55 +1000
Subject: [PATCH] misc/vim: command complete using autoload helper function.

R=golang-dev, dsymonds, jnwhiteh, n13m3y3r, gustavo
CC=golang-dev
https://golang.org/cl/4837051
---
 misc/vim/autoload/go/complete.vim | 49 +++++++++++++++++++++++++++++++
 misc/vim/ftplugin/go/import.vim   |  6 ++--
 misc/vim/plugin/godoc.vim         | 40 +------------------------
 misc/vim/readme.txt               | 35 +++++++++++++++-------
 4 files changed, 78 insertions(+), 52 deletions(-)
 create mode 100644 misc/vim/autoload/go/complete.vim

diff --git a/misc/vim/autoload/go/complete.vim b/misc/vim/autoload/go/complete.vim
new file mode 100644
index 00000000000..d4ae3b97f7b
--- /dev/null
+++ b/misc/vim/autoload/go/complete.vim
@@ -0,0 +1,49 @@
+" 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.
+"
+" This file provides a utility function that performs auto-completion of
+" package names, for use by other commands.
+
+let s:goos = $GOOS
+let s:goarch = $GOARCH
+
+if len(s:goos) == 0
+  if exists('g:golang_goos')
+    let s:goos = g:golang_goos
+  elseif has('win32') || has('win64')
+    let s:goos = 'windows'
+  elseif has('macunix')
+    let s:goos = 'darwin'
+  else
+    let s:goos = '*'
+  endif
+endif
+
+if len(s:goarch) == 0
+  if exists('g:golang_goarch')
+    let s:goarch = g:golang_goarch
+  else
+    let s:goarch = '*'
+  endif
+endif
+
+function! go#complete#Package(ArgLead, CmdLine, CursorPos)
+  let goroot = $GOROOT
+  if len(goroot) == 0
+    " should not occur.
+    return []
+  endif
+  let ret = {}
+  let root = expand(goroot.'/pkg/'.s:goos.'_'.s:goarch)
+  for i in split(globpath(root, a:ArgLead.'*'), "\n")
+    if isdirectory(i)
+      let i .= '/'
+    elseif i !~ '\.a$'
+      continue
+    endif
+    let i = substitute(substitute(i[len(root)+1:], '[\\]', '/', 'g'), '\.a$', '', 'g')
+    let ret[i] = i
+  endfor
+  return sort(keys(ret))
+endfunction
diff --git a/misc/vim/ftplugin/go/import.vim b/misc/vim/ftplugin/go/import.vim
index b5814ca5dff..6705a476b10 100644
--- a/misc/vim/ftplugin/go/import.vim
+++ b/misc/vim/ftplugin/go/import.vim
@@ -36,9 +36,9 @@ if exists("b:did_ftplugin")
     finish
 endif
 
-command! -buffer -nargs=? Drop call s:SwitchImport(0, '', <f-args>)
-command! -buffer -nargs=1 Import call s:SwitchImport(1, '', <f-args>)
-command! -buffer -nargs=* ImportAs call s:SwitchImport(1, <f-args>)
+command! -buffer -nargs=? -complete=customlist,go#complete#Package Drop call s:SwitchImport(0, '', <f-args>)
+command! -buffer -nargs=1 -complete=customlist,go#complete#Package Import call s:SwitchImport(1, '', <f-args>)
+command! -buffer -nargs=* -complete=customlist,go#complete#Package ImportAs call s:SwitchImport(1, <f-args>)
 map <buffer> <LocalLeader>f :Import fmt<CR>
 map <buffer> <LocalLeader>F :Drop fmt<CR>
 
diff --git a/misc/vim/plugin/godoc.vim b/misc/vim/plugin/godoc.vim
index 5d7ce14ad30..fdb49663125 100644
--- a/misc/vim/plugin/godoc.vim
+++ b/misc/vim/plugin/godoc.vim
@@ -11,8 +11,6 @@ let g:loaded_godoc = 1
 
 let s:buf_nr = -1
 let s:last_word = ''
-let s:goos = $GOOS
-let s:goarch = $GOARCH
 
 function! s:GodocView()
   if !bufexists(s:buf_nr)
@@ -81,43 +79,7 @@ function! s:Godoc(...)
   call s:GodocWord(word)
 endfunction
 
-function! s:GodocComplete(ArgLead, CmdLine, CursorPos)
-  if len($GOROOT) == 0
-    return []
-  endif
-  if len(s:goos) == 0
-    if exists('g:godoc_goos')
-      let s:goos = g:godoc_goos
-    elseif has('win32') || has('win64')
-      let s:goos = 'windows'
-    elseif has('macunix')
-      let s:goos = 'darwin'
-    else
-      let s:goos = '*'
-    endif
-  endif
-  if len(s:goarch) == 0
-    if exists('g:godoc_goarch')
-      let s:goarch = g:godoc_goarch
-    else
-      let s:goarch = g:godoc_goarch
-    endif
-  endif
-  let ret = {}
-  let root = expand($GOROOT.'/pkg/'.s:goos.'_'.s:goarch)
-  for i in split(globpath(root, a:ArgLead.'*'), "\n")
-    if isdirectory(i)
-      let i .= '/'
-    elseif i !~ '\.a$'
-      continue
-    endif
-    let i = substitute(substitute(i[len(root)+1:], '[\\]', '/', 'g'), '\.a$', '', 'g')
-    let ret[i] = i
-  endfor
-  return sort(keys(ret))
-endfunction
-
-command! -nargs=* -range -complete=customlist,s:GodocComplete Godoc :call s:Godoc(<q-args>)
+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
diff --git a/misc/vim/readme.txt b/misc/vim/readme.txt
index e6bdf0e116d..fe15da99356 100644
--- a/misc/vim/readme.txt
+++ b/misc/vim/readme.txt
@@ -1,5 +1,17 @@
-Vim syntax highlighting for Go (http://golang.org)
-==================================================
+Vim plugins for Go (http://golang.org)
+======================================
+
+To use all the Vim plugins, add these lines to your vimrc.
+
+  set rtp+=$GOROOT/misc/vim
+  filetype plugin indent on
+  syntax on
+
+If you want to select fewer plugins, use the instructions in the rest of
+this file.
+
+Vim syntax highlighting
+-----------------------
 
 To install automatic syntax highlighting for GO programs:
 
@@ -18,15 +30,17 @@ commands:
 
   mkdir -p $HOME/.vim/ftdetect
   mkdir -p $HOME/.vim/syntax
+  mkdir -p $HOME/.vim/autoload/go
   ln -s $GOROOT/misc/vim/ftdetect/gofiletype.vim $HOME/.vim/ftdetect/
   ln -s $GOROOT/misc/vim/syntax/go.vim $HOME/.vim/syntax
+  ln -s $GOROOT/misc/vim/autoload/go/complete.vim $HOME/.vim/autoload/go
   echo "syntax on" >> $HOME/.vimrc
 
 
-Vim filetype plugins for Go
-===========================
+Vim filetype plugins
+--------------------
 
-To install one of the available filetype plugins for Go:
+To install one of the available filetype plugins:
 
   1. Same as 1 above.
   2. Copy or link one or more plugins from ftplugin/go/*.vim to the
@@ -37,10 +51,10 @@ To install one of the available filetype plugins for Go:
      filetype plugin on
 
 
-Vim indentation plugin for Go
-=============================
+Vim indentation plugin
+----------------------
 
-To install automatic indentation for Go:
+To install automatic indentation:
 
   1. Same as 1 above.
   2. Copy or link indent/go.vim to the indent directory underneath your vim
@@ -51,11 +65,12 @@ To install automatic indentation for Go:
 
 
 Godoc plugin
-============
+------------
 
 To install godoc plugin:
 
   1. Same as 1 above.
   2. Copy or link plugin/godoc.vim to $HOME/.vim/plugin/godoc,
      syntax/godoc.vim to $HOME/.vim/syntax/godoc.vim,
-     and ftplugin/go/godoc.vim to $HOME/.vim/ftplugin/go/godoc.vim.
+     ftplugin/go/godoc.vim to $HOME/.vim/ftplugin/go/godoc.vim.
+     and autoload/go/complete.vim to $HOME/.vim/autoload/go/complete.vim.