lsp-verilog: svlangserver vs hdl_checker

[sazam0]

My understanding of elisp is very basic. I am going through lsp-verilog.el. I see 2 lsp clients are registered, both for major verilog-mode, with different priority values (-1, -2).
Note that Emacs recognizes "\\.[ds]?va?h?\\'" as verilog-mode, which includes both verilog (i.e., *.v) and systemverilog (i.e., .sv, sva) files.
"hdl_checker" works for both verilog and systemverilog files. so when I open ".sv" file :server-id 'lsp-verilog (i.e., hdl_checker) is initialized by default.
How do I switch between svlangserver and hdl_checker for systemverilog (.sv, *.sva)?

thank you for your time.

[yyoncho]

Is this a general misconfiguration on lsp-mode side, or something that you want to have for yourself?

[sazam0]

I don't understand, When it is choosing svlangserver and hdl_checker?
I am interested to know, how to define/choose one between the two options for systemverilog files (*.sv, *.sva).
right now I have both and for me it's always choosing hdl_checker.

Thank you for your time.

[yyoncho]

I understood that. You want server foo for extension fo and server bar for extension ba but server bar is starting for both. My question is whether we should make lsp-mode configuration better in order to always start foo in fo and bar in ba by default or you just want that for yourself?

[sazam0]

Sorry I don't know the trade off between two. I have not used the other one yet.
I think option to choose will help more user.

[yyoncho]

Something like that should work for you (make sure to replace server-1, server-2, and ext1). Then use that function for verilog-mode-hook

(defun my/lsp-for-verilog ()
  (setq-local lsp-enabled-clients
              (list (if (string= (f-ext (buffer-file-name)) "ext1")
                        'server-1
                      'server-2)))
  (lsp))

[sazam0]

thank you for your help. I will update here, if I have something.