svls

SystemVerilog language server

Feature

• Linter based on svlint.

Installation

Download binary

Download from release page, and extract to the directory in PATH.

snapcraft

You can install from snapcraft

sudo snap install svls

Cargo

You can install by cargo.

cargo install svls

Configuration

Language server

svls uses .svls.toml at the root of repository. The example of .svls.toml is below:

[verilog]
include_paths = ["src/header"]
defines = ["DEBUG", "VAR=1"]
plugins = ["path/to/libfoo.so", "path/to/libbar.so"]

[option]
linter = true

[verilog] section

include_paths is include paths from the root of repository. defines is define strings. plugins is paths to svlint plugins from the working directory.

[option] section

linter shows whether linter feature is enabled.

Linter

Linter uses .svlint.toml at the root of repository. If .svlint.toml can't be used, all lint rules are enabled. Please see svlint#configuration for the detailed information.

Usage

Visual Studio Code

Please install svls-vscode extension from marketplace.

Vim/Neovim with LanguageClient-neovim

let g:LanguageClient_serverCommands = {
    \ 'systemverilog': ['svls'],
    \ }

Vim/Neovim with vim-lsp

if executable('svls')
    au User lsp_setup call lsp#register_server({
        \ 'name': 'svls',
        \ 'cmd': {server_info->['svls']},
        \ 'whitelist': ['systemverilog'],
        \ })
endif

Vim/Neovim with coc.nvim

In configuration file

"languageserver": {
    "svls": {
        "command": "svls",
        "filetypes": ["systemverilog"]
    }
}

Neovim with nvim-lspconfig

In configuration file

{
  "neovim/nvim-lspconfig",
  opts = {
    servers = {
      svls = {
        root_dir = function(fname)
          return require("lspconfig.util").find_git_ancestor(fname)
        end,
        cmd = { "svls" },
        filetypes = { "verilog", "systemverilog" },
      },
    },
  },
}

Emacs with lsp-mode

(use-package flycheck
  :ensure t
  :defer t
  :init (global-flycheck-mode t))

(use-package company
  :ensure t
  :defer t
  :init (global-company-mode t)
  :config
  ;; Company Flx adds fuzzy matching to company, powered by the sophisticated
  ;; sorting heuristics  in =flx=
  (use-package company-flx
    :ensure t
    :after company
    :init (company-flx-mode t))
  ;; Company Quickhelp
  ;; When idling on a completion candidate the documentation for the
  ;; candidate will pop up after `company-quickhelp-delay' seconds.
  (use-package company-quickhelp
    :after company
    :ensure t
    ;; :init (company-quickhelp-mode t)
    :hook (prog-mode . (lambda ()
                         (when (window-system)
                           (company-quickhelp-local-mode))))
    :config
    (setq company-quickhelp-delay 0.2
          company-quickhelp-max-lines nil)))

(use-package lsp-mode
  :defer t
  :ensure t
  :commands lsp
  :config
  (setq lsp-log-io nil
        lsp-auto-configure t
        lsp-auto-guess-root t
        lsp-enable-completion-at-point t
        lsp-enable-xref t
        lsp-prefer-flymake nil
        lsp-use-native-json t
        lsp-enable-indentation t
        lsp-response-timeout 10
        lsp-restart 'auto-restart
        lsp-keep-workspace-alive t
        lsp-eldoc-render-all nil
        lsp-enable-snippet nil
        lsp-enable-folding t)
   ;;; lsp-ui gives us the blue documentation boxes and the sidebar info
  (use-package lsp-ui
    :defer t
    :ensure t
    :after lsp
    :commands lsp-ui-mode
    :config
    (setq lsp-ui-sideline-ignore-duplicate t
          lsp-ui-sideline-delay 0.5
          lsp-ui-sideline-show-symbol t
          lsp-ui-sideline-show-hover t
          lsp-ui-sideline-show-diagnostics t
          lsp-ui-sideline-show-code-actions t
          lsp-ui-peek-always-show t
          lsp-ui-doc-use-childframe t)
    :bind
    (:map lsp-ui-mode-map
          ([remap xref-find-definitions] . lsp-ui-peek-find-definitions)
          ([remap xref-find-references] . lsp-ui-peek-find-references))
    :hook
    ((lsp-mode . lsp-ui-mode)
     (lsp-after-open . (lambda ()
                         (lsp-ui-flycheck-enable t)
                         (lsp-ui-sideline-enable t)
                         (lsp-ui-imenu-enable t)
                         (lsp-lens-mode t)
                         (lsp-ui-peek-enable t)
                         (lsp-ui-doc-enable t)))))
  ;;; company lsp
  ;; install LSP company backend for LSP-driven completion
  (use-package company-lsp
    :defer t
    :ensure t
    :after company
    :commands company-lsp
    :config
    (setq company-lsp-cache-candidates t
          company-lsp-enable-recompletion t
          company-lsp-enable-snippet t
          company-lsp-async t)
    ;; avoid, as this changes it globally do it in the major mode instead (push
    ;; 'company-lsp company-backends) better set it locally
    :hook (lsp-after-open . (lambda()
                              (add-to-list (make-local-variable 'company-backends)
                                           'company-lsp)))))

(use-package verilog-mode
  :defer t
  :config
  (require 'lsp)
  (lsp-register-client
   (make-lsp-client :new-connection (lsp-stdio-connection '("svls"))
   :major-modes '(verilog-mode)
   :priority -1
   ))
  :hook (verilog-mode . (lambda()
      (lsp)
      (flycheck-mode t)
      (add-to-list 'lsp-language-id-configuration '(verilog-mode . "verilog")))))

Emacs with verilog-ext

(require 'verilog-ext)
(verilog-ext-mode-setup)
(verilog-ext-eglot-set-server 've-svls) ;`eglot' config
(verilog-ext-lsp-set-server 've-svls)   ; `lsp' config

Helix

In languages.toml:

[language-server.svls]
command = "svls"

[[language]]
name = "verilog"
language-servers = ["svls"]