A completion can not go with no arguments.

[DehanLUO]

Reproduce the bug

~/.vim/vimrc

call plug#begin('~/.vim/plugged')

Plug 'preservim/nerdtree'
Plug 'scrooloose/nerdtree-project-plugin'

call plug#end()

Open vim.

Describe the bug

My vim (8.2.3200) gives the following warning with the two plugins installed.

Error detected while processing /home/admin/.vim/plugged/nerdtree/plugin/NERD_tree.vim[229]..function nerdtree#postSourceActions[5]..script /home/admin/.vim/plugged/nerdtree-project-plugin/nerdtree_plugin/project.vim:
line   45: E1208: -complete used without -nargsPress 

Looking at the repo for project.vim, the existing code causes the warning.

command! -nargs=0 -complete=customlist,NERDTreeCompleteProjectNames NERDTreeProjectLoadFromCWD call g:NERDTreeProject.LoadFromCWD() 

A completion should go with at least an argument, while -nargs=0 means no arguments are allowed. Changing to –nargs=?, specifying 0 or 1 arguments are allowed, can solve the problem.

[terrencetec]

I am also encountering the same error.

[nicored]

lgtm and it works on my machine

[zythina]

Same error on both Windows 11 with Powershell and Arch Linux on bash and zshrc ( although it may not be relevant )

LE: This branch's fix worked for me, thank you!

[unfirthman]

Had the same issue with Ubuntu 22.04 on a Macbook using ohmyzsh. I applied this fix locally and it worked. Thanks!

[jlejeune]

The fix works like a charm, thanks !

[silopolis]

Just switched Vundle entry to @DehanLUO 's repo in vimrc and back on track 💯
Thanks!

[Song-Tianxiang]

I think it's better change line 45 to:
command! -nargs=0 NERDTreeProjectLoadFromCWD call g:NERDTreeProject.LoadFromCWD()

There is no argument needed.

[DehanLUO]

I think it's better change line 45 to: command! -nargs=0 NERDTreeProjectLoadFromCWD call g:NERDTreeProject.LoadFromCWD()

There is no argument needed.

Yes. You are right.

-complete=customlist,NERDTreeCompleteProjectNames is meant to provide ProjectName completions for command g:NERDTreeProject.LoadFromCWD(), which is designed to take no arguments.

Your version, command! -nargs=0 NERDTreeProjectLoadFromCWD call g:NERDTreeProject.LoadFromCWD(), will not attempt to use the useless argument completion, and it should resolve the warning.

Thanks. Have a good day!