json-ls starts without completionProvider capability (but has it in lsp-start-plain)

[sethidden]

Hello.

I noticed that in js-json-mode I get no code completions, despite the fact my JSON file has a $schema property.

I went ahead into M-x lsp-start-plain and noticed that completions work there, on the very same file.

Does anybody know what could be the culprit here? How do I make completionProvider appear in json-ls also on my config? My literate config is attached in the exapnder box at the bottom of this post

I'm on Emacs 30, but same thing happens on 28.

Capabilities

As you can see, completionProvider is missing when starting json-ls from my own config

In lsp-start-plain:

In my own config:

---

company-diag

I also ran company-diag to see what are the differences between the two Emacs instance
I called M-x company-diag after writing " so that company would trigger completion

In lsp-start-plain:

In my own config:

---

The file I'm editing

The contents of the file I'm editing are below. Typing " above "onestop_id" should trigger completions from json-ls based on the $schema

{
  "$schema": "https://dmfr.transit.land/json-schema/dmfr.schema-v0.4.1.json",
  "feeds": [
    {
      "id": "f-s-anm~it",
      "spec": "gtfs",
      "urls": {
        "static_current": "https://www.anm.it/google/google-transit.zip"
      },
      "license": {
        "url": "http://www.dati.gov.it/iodl/2.0/",
        "use_without_attribution": "no",
        "create_derived_product": "yes"
      },
      "operators": [
        {
          "onestop_id": "o-s-aziendanapoletanamobilit",
          "name": "Azienda Napoletana Mobilità",
          "short_name": "ANM",
          "website": "http://www.anm.it",
          "associated_feeds": [
            {
              "gtfs_agency_id": "ANM"
            }
          ]
        }
      ]
    }
  ],
  "license_spdx_identifier": "CDLA-Permissive-1.0"
}

---

lsp-doctor

Checking for Native JSON support: OK
Check emacs supports `read-process-output-max': OK
Check `read-process-output-max' default has been changed from 4k: ERROR
Byte compiled against Native JSON (recompile lsp-mode if failing when Native JSON available): OK
`gc-cons-threshold' increased?: ERROR
Using `plist' for deserialized objects? (refer to https://emacs-lsp.github.io/lsp-mode/page/performance/#use-plists-for-deserialization): OPTIONAL
Using emacs 28+ with native compilation?: OK

---

My config

I removed some parts, like mu4e and erc config.

My config

#+STARTUP: overview

* Generic
#+begin_src emacs-lisp
  (menu-bar-mode -1)
  (tool-bar-mode -1)
  (scroll-bar-mode -1)
  (find-file-noselect "~/.emacs.el")
  (find-file-noselect "~/.config.org")
  (setq display-line-numbers-type 'relative)
  (global-display-line-numbers-mode)
  (setq max-specpdl-size 8000)
  (set-frame-font "FiraCode Nerd Font:size=12")
  (setq max-lisp-eval-depth 30000)
  ;(setenv "SSH_AUTH_SOCK" (shell-command-to-string "gpgconf --list-dirs agent-ssh-socket"))
  (setenv "SSH_AUTH_SOCK" "/run/user/1000/gnupg/S.gpg-agent.ssh")
  (setenv "PATH" "/run/user/1000/fnm_multishells/128547_1682200054044/bin:/home/rt/bin:/home/rt/.npm-global/bin:/usr/local/bin:/snap/bin:/home/rt/.dotnet/tools:/home/rt/.local/bin:/home/rt/.emacs.d/bin::/run/user/1000/fnm_multishells/711_1682160523754/bin:/home/rt/bin:/home/rt/.npm-global/bin:/usr/local/bin:/snap/bin:/home/rt/.dotnet/tools:/home/rt/.local/bin:/home/rt/.emacs.d/bin::/usr/local/sbin:/usr/local/bin:/usr/bin:/opt/android-sdk/platform-tools:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl")
  (setq enable-recursive-minibuffers t)
  (minibuffer-depth-indicate-mode 1)
  ;; (setq-default indent-tabs-mode nil)
  ;; (setq-default tab-width 2)
  ;; (setq indent-line-fucntion 'insert-tab)
#+end_src
* Evil
#+begin_src emacs-lisp
  (use-package evil
    :straight t
    :init 
    (setq evil-want-integration t
	  evil-want-minibuffer t
	  evil-want-keybinding nil)
    :config
    (evil-mode 1))
#+end_src

** Extras
#+begin_src emacs-lisp
  (use-package evil-collection
    :straight t
    :after evil
    :init
    (setq evil-collection-setup-minibuffer t)
    :config 
    (evil-collection-init '(magit org dired elfeed minibuffer company vertico eww)))

  (use-package evil-org
    :straight t
    :after org
    :hook (org-mode . (lambda () evil-org-mode))
    :config
    (require 'evil-org-agenda)
    (evil-org-agenda-set-keys))

  (use-package evil-surround
    :straight t
    :config
    (global-evil-surround-mode 1))

  (use-package evil-commentary
    :straight t
    :config
    (evil-commentary-mode))
#+end_src
** Keybinds
#+begin_src emacs-lisp
  (use-package general
    :straight t
    :after evil
    :config

    (general-define-key
     "C-x b" 'consult-buffer)

    (general-create-definer tyrant-def
      :states '(normal insert motion emacs)
      :keymaps 'override
      :prefix "SPC"
      :non-normal-prefix "M-SPC")

    (tyrant-def
      "w" 'evil-write
      "pp" 'consult-projectile-switch-project
      "pa" 'projectile-add-known-project
      "pc" 'org-projectile-capture-for-current-project
      "SPC" 'consult-projectile
      "sp" 'consult-ripgrep
      "fr" 'elfeed
      "fm" 'mu4e
      "gB" 'magit-blame-addition
      "gC" 'magit-clone
      "gg" 'magit-status))
#+end_src

#+end_src
* Color scheme
#+begin_src emacs-lisp
  (use-package gruvbox-theme :straight t)
  (load-theme 'gruvbox-dark-hard)
#+end_src
* Magit
#+begin_src emacs-lisp
  (use-package magit
    :straight t
    :config
    (setq magit-clone-default-directory "~/dev/"
	  magit-clone-set-remote.pushDefault t)
    :bind (:map magit-status-mode-map ; conflicts with <leader> prefix for evil
		("SPC" . nil)))

#+end_src

* Activity watch
#+begin_src emacs-lisp
  (use-package activity-watch-mode
    :straight t
    :config (global-activity-watch-mode))
#+end_src

* RSS
#+begin_src emacs-lisp
  (use-package elfeed
    :straight t

  (defun elfeed-mpv-url ()
    "Visit the current entry in mpv."
    (interactive)
    (let ((browse-url-browser-function
	   #'browse-url-mpv))
      (pcase major-mode
	('elfeed-search-mode (elfeed-search-browse-url))
	('elfeed-show-mode (elfeed-show-visit)))))

  (defun browse-url-mpv (url &optional _)
    (start-process "mpv" nil "mpv"
		   (shell-quote-wildcard-pattern url)))
#+end_src

* tree-sitter 
#+begin_src emacs-lisp
  (use-package tree-sitter
    :straight t
    :config
    (global-tree-sitter-mode)
    (add-hook 'tree-sitter-after-on-hook #'tree-sitter-hl-mode))

  (use-package tree-sitter-langs
    :straight t
    :config
    (tree-sitter-require 'typescript)
    (tree-sitter-require 'javascript))
#+end_src
* Pickers
#+begin_src emacs-lisp

  (use-package vertico
    :straight t :init
    (vertico-mode))

  (use-package orderless ;fuzzy completion
    :straight t
    :custom
    (completion-styles '(orderless basic))
    (completion-category-overrides '((file (styles basic partial-completion)))))

  (use-package embark ;hydra
    :straight t
    :bind
    (("C-." . embark-act)))


  (use-package projectile :straight t :config (projectile-mode))

  (use-package consult :straight t)
  (use-package consult-projectile :straight t)
  (use-package embark-consult :straight t :hook (embark-collect-mode . consult-preview-at-point-mode))

  (use-package marginalia :straight t :config (marginalia-mode)) ;add fancy description on the right

#+end_src
* Language support
#+begin_src emacs-lisp 
  (use-package typescript-mode :straight t)
  (use-package web-mode :straight t)
  (use-package flycheck :straight t :init (global-flycheck-mode))
  (use-package company :straight t :init (global-company-mode 1)) ; dropdown completions
  (use-package lsp-mode
    :straight t
    :after company
    :hook (
	   (js-json-mode . lsp)
	   (js-mode . lsp)
	   (typescript-mode . lsp)))
  (use-package nodejs-repl :straight t)

#+end_src

* Utils
#+begin_src elisp
  (defun rtz/get-random-element (list)
    ()
    (nth (abs (% (random t) (length list))) list))


  (defun rtz/shuffle-list (list)
    ()
    (setq i 0)
    (while ( < i (length list))
      (setq swapindex (% (abs (random t)) (length list)))
      (setq tmp (nth swapindex list))
      (setcar (nthcdr swapindex list) (nth i list))
      (setcar (nthcdr i list) tmp)
      (setq i (1+ i)))
    list)
#+end_src

* Music
#+begin_src emacs-lisp
  ;; (defvar scales (list "C" "C#" "D" "D#" "E" "F" "F#" "G" "G#" "A" "A#" "B"))
  (setq scales '("Bb" "F" "C" "G" "D"))

  (defun nshuffle (sequence)
    (cl-loop for i from (length sequence) downto 2
	  do (cl-rotatef (elt sequence (random i))
		      (elt sequence (1- i))))
    sequence)

  (defun getscales ()
    "Get random scales for piano practice"
    (interactive)
    (message (string-join (nshuffle scales) "\n"))
  )
#+end_src

[sethidden]

Okay, you just need to install the yasnippet package and run the yasnippet minor mode. I didn't take that into account because I always thought yasnippet is just for snippets, and has nothing to do with completions - still kinda confused as to why it's a dependency (EDIT: See here for more information #3693 (comment))

Anyways, it's even in the FAQ!

lsp-mode/docs/page/faq.md

Lines 30 to 34 in 99b812e

	### :grey_question: The completion does not work fine and inserts arguments and placeholders, what I am doing wrong?
	make sure you have installed `yasnippet` and you have `yasnippet` minor mode enabled.
	---

(use-package yasnippet :straight t :init (yas-global-mode))