vim: convert config to xdg

.gitignore

@@ -1 +1,2 @@
 *.swp
+vim/bundle

vim/vimrc

@@ -1,12 +1,29 @@
 set nocompatible
 
+" XDG
+set undodir=$XDG_CACHE_HOME/vim/undo
+set directory=$XDG_CACHE_HOME/vim/swap
+set backupdir=$XDG_CACHE_HOME/vim/backup
+set viminfo+='1000,n$XDG_CACHE_HOME/vim/viminfo
+set runtimepath=$XDG_CONFIG_HOME/vim,$VIMRUNTIME,$XDG_CONFIG_HOME/vim/after
+
+let g:session_directory=$XDG_CACHE_HOME."/vim/sessions"
+
+for directory in [&undodir, &directory, &backupdir, g:session_directory]
+  if !filewritable(expand(directory))
+      call mkdir(expand(directory), "p")
+  endif
+endfor
+
 " VUNDLE
 " {
-if filereadable(expand("$HOME/.vim/bundle/vundle/README.md"))
+let bundledir=$XDG_CONFIG_HOME."/vim/bundle/"
+
+if filereadable(expand(bundledir."vundle/README.md"))
     filetype off                   " required!
 
-    set rtp+=~/.vim/bundle/vundle/
-    call vundle#rc()
+    let &rtp=&rtp.",".bundledir."vundle/"
+    call vundle#begin(bundledir)
 
     " let Vundle manage Vundle
     " required!
@@ -38,6 +55,8 @@ if filereadable(expand("$HOME/.vim/bundle/vundle/README.md"))
     Plugin 'scrooloose/nerdcommenter'
 
     Plugin 'VisIncr'
+
+    call vundle#end()
 endif
 " }
 
@@ -102,19 +121,8 @@ set undolevels=150
 set ttimeoutlen=100
 
 set undofile
-
-if !filewritable(expand("~/.vim/tmp/undo"))
-    call mkdir(expand("~/.vim/tmp/undo"), "p")
-endif
-set undodir=~/.vim/tmp/undo
-
 set backup
 
-if !filewritable(expand("~/.vim/tmp/backup"))
-    call mkdir(expand("~/.vim/tmp/backup"), "p")
-endif
-set backupdir=~/.vim/tmp/backup
-
 let mapleader = ","
 
 let g:bufferhint_MaxWidth = 200
@@ -170,11 +178,6 @@ let g:UltiSnipsJumpForwardTrigger="<tab>"
 let g:session_autoload = 'no'
 let g:session_autosave = 'no'
 
-let g:session_directory=$HOME."/.vim/tmp/sessions"
-if !filewritable(expand(g:session_directory))
-    call mkdir(expand(g:session_directory), "p")
-endif
-
 autocmd FileType ruby let b:switch_custom_definitions =
     \ [
     \   {

zsh/.zshenv

@@ -23,4 +23,5 @@ export KEYTIMEOUT=1
 export EDITOR=vim
 export PAGER=less
 
+export VIMINIT=":source $XDG_CONFIG_HOME/vim/vimrc"
 export ZDOTDIR=${XDG_CONFIG_HOME}/zsh