nvim/nerdtree.config.vim at master · itrufeng/nvim · GitHub

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" https://github.com/scrooloose/nerdtree

" How can I open a NERDTree automatically when vim starts up?
autocmd vimenter * NERDTree

" How can I open a NERDTree automatically when vim starts up if no files were specified?
autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * if argc() == 0 && !exists("s:std_in") | NERDTree | endif

" 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 | exe 'cd '.argv()[0] | endif

" How can I map a specific key or shortcut to open NERDTree?
map <C-n> :NERDTreeToggle<CR>

" How can I close vim if the only window left open is a NERDTree?
autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif

" Hot can I jump to the tree and focus current source file?
map <Leader>j :NERDTreeFind<Enter>