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Frank Bicknell edited this page 2023-10-18 11:50:55 -04:00

Welcome to the NERDTree Wiki!

Feel free to contribute any tips you have learned while using NERDTree.

Starting NERDTree

Suppress starting NERDTree if this is a quickfix

Background

I noticed that some of the snippets used if &buftype != 'quickfix' lalala, but for some reason, this doesn't work. Even :set buftype? after starting a quickfix (vim -q errorfile), it didn't return a value.

So I nosed around and found this construct, which gets us a list of command line options -- and the next line, which is 0 or 1 depending on whether -q was thrown on the command line:

let s:options = split(system("ps -o command= -p " . getpid()))
let s:q_opt = count(s:options, '-q')

Quickfix and NERDTree

So if you start vim with any of the usual snippets of code, but enter quickfix mode: vim -q errorfile, you wind up with:

  • the error file as requested
  • NERDTree started, which for quickfix operations is less desirable
  • the cursor in the NERDTree, which is really less than desirable
  • the first error on the list missing. Sure, you can use :cc to get at it, but fingers are tired.

The code to end this misery is:

autocmd StdinReadPre * let s:std_in=1
" kludgy way of getting the command line:
let s:options = split(system("ps -o command= -p " . getpid()))
let s:q_opt = count(s:options, '-q')

" Start NERDTree. If a file is specified, move the cursor to its window.
" Do not start NERDTree if this is a quickfix operation.
autocmd VimEnter * if s:q_opt == 0 | NERDTree | endif | if argc() > 0 || exists("s:std_in") | wincmd p | endif

Credits

Vimscripts: check if item in list For the count(g:foo, a:bar) idea

Is it possible to access vim's command-line arguments in vimscript? For the split(system("ps... idea for getting at command line options