VIM is now an IDE

.vimrc

@@ -15,7 +15,7 @@ call plug#begin()
     Plug 'Shougo/deoplete.nvim'
     Plug 'roxma/nvim-yarp'
     Plug 'roxma/vim-hug-neovim-rpc'
-    Plug 'tbodt/deoplete-tabnine', { 'do': './install.sh' }
+    "Plug 'tbodt/deoplete-tabnine', { 'do': './install.sh' }
     Plug 'jpalardy/vim-slime'
     Plug 'autozimu/LanguageClient-neovim', {
     \ 'branch': 'next',
@@ -34,11 +34,45 @@ let g:deoplete#enable_at_startup = 1
  
 set tags+=./.tags
 
+
+" Session management
+
+set switchbuf=useopen,usetab
+
+
+fu! SaveSess()
+    execute 'mksession! ' . getcwd() . '/.session.vim'
+endfunction
+
+fu! RestoreSess()
+if filereadable(getcwd() . '/.session.vim')
+    let initial_args = argv()
+    execute 'so ' . getcwd() . '/.session.vim'
+    for file in initial_args
+        if bufloaded(file) != 1
+            execute 'tabnew ' . getcwd() . '/' . file 
+        else
+            execute 'sb ' . file
+        endif
+    endfor
+endif
+endfunction
+
+" Save session on quitting Vim
+autocmd VimLeave * NERDTreeTabsClose
+autocmd VimLeave * call SaveSess()
+
+" Restore session on starting Vim
+autocmd VimEnter * nested call RestoreSess()
+
 "----------------------
  
 " move between tabs
- nnoremap <A-Left>  :tabprevious<CR>
- nnoremap <A-Right> :tabnext<CR>
+nnoremap <A-Left>  :tabprevious<CR>
+nnoremap <A-Right> :tabnext<CR>
+
+
+ map <C-n> :NERDTreeMirrorToggle<CR>
  
 " prevent mouse vanishing
 set nomousehide