Auto-open NERDTree in “EVERY” tab

Question

Is it possible to open NERDTree in every tab with pressing t or T in NERDTree, if yes, How?

Answer 1

This is probably not the best way, but if you edit plugin/NERDTree.vim and change this:

 exec "nnoremap <silent> <buffer> ". g:NERDTreeMapOpenInTab ." :call <SID>openInNewTab(0)<cr>"

to this:

 exec "nnoremap <silent> <buffer> ". g:NERDTreeMapOpenInTab ." :call <SID>openInNewTab(0)<cr>:NERDTree<cr>"

it will alter the binding of 't' in the NERDTree view to first open the file and then open NERDTree. Note, that the NERDTree views will not keep in sync.

Answer 2

How about toggling it.

" in .vimrc
" NERDTree, Use F3 for toggle NERDTree
nmap <silent> <F3> :NERDTreeToggle<CR>

In OSX, you just need to fn-F3 to toggle NERDTree.

Answer 3

This problem was actually mentioned in the official Repository's Readme file including three situations related to opening NERDTree automatically:

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How can I open a NERDTree automatically when vim starts up?

Stick this in your vimrc: autocmd vimenter * NERDTree

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How can I open a NERDTree automatically when vim starts up if no files were specified?

Stick this in your vimrc:

autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * if argc() == 0 && !exists("s:std_in") | NERDTree | endif

Note: Now start vim with plain vim, not vim .

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How can I open NERDTree automatically when vim starts up on opening a directory?

autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * if argc() == 1 && isdirectory(argv()[0]) && !exists("s:std_in") | exe 'NERDTree' argv()[0] | wincmd p | ene | endif

This window is tab-specific, meaning it's used by all windows in the tab. This trick also prevents NERDTree from hiding when first selecting a file.

Answer 4

autocmd VimEnter * NERDTree
autocmd BufEnter * NERDTreeMirror

autocmd VimEnter * wincmd w

This one is a little better than Dustin's one because it places the cursor directly on the file you are intending to edit for quick edits. Thanks dustin for the original example ^^

Answer 5

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

Answer 6

A better solution is to open NERDTree only if there are no command line arguments set.

" Open NERDTree in new tabs and windows if no command line args set autocmd VimEnter * if !argc() | NERDTree | endif autocmd BufEnter * if !argc() | NERDTreeMirror | endif

NERDTree is e.g. not helpful if you do a git commit or something similiar.