Update nerdtree settings

vim/.config/vim/plug.d/nerdtree.vim

@@ -1,20 +1,31 @@
-Plug 'preservim/nerdtree', { 'on':  'NERDTreeToggle', 'tag': '6.9.8' }
-
-" Close all open buffers on entering a window if the only
-" buffer that's left is the NERDTree buffer
-function! s:CloseIfOnlyNerdTreeLeft()
-    if exists("t:NERDTreeBufName") &&
-    \   bufwinnr(t:NERDTreeBufName) != -1 &&
-    \   winnr("$") == 1
-        quit
-    endif
-endfunction
+Plug 'preservim/nerdtree', { 'tag': '6.9.11' }
 
 let g:NERDTreeDirArrowExpandable = '▸'
 let g:NERDTreeDirArrowCollapsible = '▾'
 
 let NERDTreeDirArrows=1
-let NERDTreeIgnore = ['\.pyc$', '\.swp$']
+let NERDTreeIgnore = ['\.swp$']
 
 map <leader>nt :NERDTreeToggle<CR>
-autocmd WinEnter * call s:CloseIfOnlyNerdTreeLeft()
+
+" Close nerdtree if it's the last buffer
+autocmd BufEnter * if tabpagenr('$') == 1 && winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree()
+\ | quit
+\ | endif
+
+" Mirror nerdtree in each tab
+autocmd BufWinEnter * silent NERDTreeMirror
+
+" check if reading from stdin
+autocmd StdinReadPre * let s:std_in=1
+
+" open nerdtree if no args in passed to vim
+autocmd VimEnter * if argc() == 0 && !exists('s:std_in') | NERDTree | wincmd p | endif
+
+" open nerdtree if vim opens to a directory
+autocmd VimEnter * if argc() == 1 && isdirectory(argv()[0]) && !exists('s:std_in')
+\ | execute 'NERDTree' argv()[0]
+\ | wincmd p
+\ | enew
+\ | execute 'cd '.argv()[0]
+\ | endif