plugin: add vim-godef plugin

  vim-godef:a679733999fce6a566704a4df15f6813a900e8a9

Signed-off-by: lilei <[email protected]>

vim/bundle/vim-godef/README.md

@@ -0,0 +1,43 @@
+## You probably want to be using https://github.com/fatih/vim-go instead
+
+
+This plugin adds godef support to vim.
+
+The `godef` tool from Roger Peppe parses Go code and returns the location of
+the definition of a symbol.  It can be installed with
+
+    go get -v github.com/rogpeppe/godef
+    go install -v github.com/rogpeppe/godef
+
+To install the vim-godef plugin, clone this vim-godef repository and (from it) copy `plugin/godef.vim` to `~/.vim/plugin` .
+
+Or, if you're using pathogen, on Linux:
+
+    git clone https://github.com/dgryski/vim-godef ~/.vim/bundle/vim-godef
+
+or on Windows:
+
+    git clone https://github.com/dgryski/vim-godef %USERPROFILE%\vimfiles\bundle\vim-godef
+
+This modules overrides the `gd` (go to local definition) command to open a new
+window at the definition of the symbol under the cursor.  Setting
+
+    g:godef_split=0
+
+(that is, entering the command `let g:godef_split=0` or inserting it into your ~/.vimrc)
+will reuse the current window, and
+
+    g:godef_split=2
+
+will open the definition in a new tab, and
+
+    g:godef_split=3
+
+will use a vertical split instead of the default horizontal split.
+
+If you want jumps to the same file to move your current cursor instead of splitting, use
+
+    g:godef_same_file_in_same_window=1
+
+This also adds a `:Godef ` which will work for global types, methods,
+constants, and variables in the current package.

vim/bundle/vim-godef/plugin/godef.vim

@@ -0,0 +1,59 @@
+" needs https://github.com/rogpeppe/rog-go/tree/master/exp/cmd/godef/godef.go
+
+if !exists("g:godef_command")
+    let g:godef_command = "godef"
+endif
+
+if !exists("g:godef_split")
+    let g:godef_split = 1
+endif
+
+if !exists("g:godef_same_file_in_same_window")
+    let g:godef_same_file_in_same_window=0
+endif
+
+if !exists("g:godef_system_function")
+    let g:godef_system_function="system"
+endif
+
+function! GodefUnderCursor()
+    let pos = getpos(".")[1:2]
+    if &encoding == 'utf-8'
+        let offs = line2byte(pos[0]) + pos[1] - 2
+    else
+        let c = pos[1]
+        let buf = line('.') == 1 ? "" : (join(getline(1, pos[0] - 1), "\n") . "\n")
+        let buf .= c == 1 ? "" : getline(pos[0])[:c-2]
+        let offs = len(iconv(buf, &encoding, "utf-8"))
+    endif
+    silent call Godef("-o=" . offs)
+endfunction
+
+function! Godef(arg)
+    let out=call(g:godef_system_function, [g:godef_command . " -f=" . expand("%:p") . " -i " . shellescape(a:arg), join(getbufline(bufnr('%'), 1, '$'), "\n")])
+
+    let old_errorformat = &errorformat
+    let &errorformat = "%f:%l:%c"
+
+    if out =~ 'godef: '
+        let out=substitute(out, '\n$', '', '')
+        echom out
+    elseif g:godef_same_file_in_same_window == 1 && (out) =~ "^".expand("%:p")
+        let x=stridx(out, ":")
+        let out=expand("%").strpart(out, x, len(out)-x)
+        lexpr out
+    else
+        if g:godef_split == 1
+            split
+        elseif g:godef_split == 2
+            tabnew
+        elseif g:godef_split == 3
+            vsplit
+        endif
+        lexpr out
+    end
+    let &errorformat = old_errorformat
+endfunction
+
+autocmd FileType go nnoremap <buffer> gd :call GodefUnderCursor()<cr>
+command! -range -nargs=1 Godef :call Godef(<q-args>)

vim/bundles.vim

@@ -20,6 +20,7 @@ Bundle 'scrooloose/nerdcommenter'
 Bundle 'vim-scripts/DoxygenToolkit.vim'
 Bundle 'davidhalter/jedi-vim'
 Bundle 'fatih/vim-go'
+Bundle 'dgryski/vim-godef'
 
 filetype plugin indent on     " required!