autocmd VimEnter * NERDTree
autocmd BufEnter * NERDTreeMirror
edit: The above command seems to open the new tab in NERDTree’s buffer. Instead use this as mentioned by wejrowski in the comment below :
autocmd BufWinEnter * NERDTreeMirror
autocmd VimEnter * NERDTree
autocmd BufEnter * NERDTreeMirror
edit: The above command seems to open the new tab in NERDTree’s buffer. Instead use this as mentioned by wejrowski in the comment below :
autocmd BufWinEnter * NERDTreeMirror