How to get project root dir

[gagara]

Is there any way to get root dir of current project (the one which is send to language server)?
Thanks.

[fannheyward]

Try :CocCommand workspace.workspaceFolders.

[gagara]

I tried. But it returns the list of all opened projects. But I need to know the project for which currently opened file belongs to.
Maybe it is possible to pass some extra arguments to it?

[changyiyao]

I just has the same request.
waiting for the reply.

[gagara]

Having the list of all projects dirs and full file path for current buffer it is possible to find "current" project with following function:

function! SetVimtestProjectRoot(file)
	if exists("g:WorkspaceFolders")
		for f in g:WorkspaceFolders
			if match(a:file, f, 0) == 0 | let g:test#project_root = f | return | endif
		endfor
	endif
endfunction

Here I assign current project dir to g:test#project_root (it is used by vim-test plugin). But it is easy to add any other logic.
Also I have autocmd to do it once file is opened:

autocmd BufEnter * :call SetVimtestProjectRoot(expand('%:p'))

Maybe there is better/simpler solution, though?

[changyiyao]

Good ideas.
In my scenario, I use bottomUp configuration with rootPattern to recognize workspaces. When the above iterable codes should be reverse which is right for me, since buffer to /a/b/file should match the most closest path /a/b as its workspace, which is the last item in g:WorkspaceFolders when I open vim in shell pwd /a.