diff --git a/home/.config/nvim/rc/plugins.d/nerdtree.vim b/home/.config/nvim/rc/plugins.d/nerdtree.vim
index d789901..eab8fe4 100644
--- a/home/.config/nvim/rc/plugins.d/nerdtree.vim
+++ b/home/.config/nvim/rc/plugins.d/nerdtree.vim
@@ -5,8 +5,23 @@ let g:NERDTreeDirArrowCollapsible = '▼'
 let NERDTreeShowLineNumbers=1
 let NERDTreeShowHidden=1
 let NERDTreeMinimalUI = 1
-let g:NERDTreeWinSize=38
+let g:NERDTreeWinSize=25
 if empty($DISPLAY) " Disable devicons for nerdtree in TTY
     let g:webdevicons_enable_nerdtree = 0
 endif
 
+"Start NerdTree. If a file is specified, move the cursor to its window.
+autocmd StdinReadPre * let s:std_in=1
+autocmd VimEnter * if argc() == 1 && isdirectory(argv()[0]) && !exists('s:std_in') |
+    \ execute 'NERDTree' argv()[0] | wincmd p | enew | execute 'cd '.argv()[0] |
+    \ endif
+autocmd VimEnter *  if argc() > 0 && !isdirectory(argv()[0]) || exists("s:std_in") |
+    \ execute 'NERDTree' fnamemodify(argv()[0], ':p:h') | wincmd p | endif
+
+" Exit Vim if NerdTree is the only window left.
+autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() |
+    \ quit | endif
+
+" If another buffer tries to replace NerdTree, put it in another window, and bring back NerdTree.
+autocmd BufEnter * if bufname('#') =~ 'NERD_tree_\d\+' && bufname('%') !~ 'NERD_tree_\d\+' && winnr('$') > 1 |
+    \ let buf=bufnr() | buffer# | execute "normal! \<C-W>w" | execute 'buffer'.buf | endif