Pilgrim
How is snippet expansion/code completion supposed to work in Emacs with eglot/elixir-ls
I’ve got elixir-mode and eglot configured in my emacs.d and it mostly works. One thing I can’t figure out though is how to work with the code completion (via company) in elixir code.
Say I type defm at this point I get the completion options pop up. I select defmodule and then it expands to
defmodule $1 do
$0
end
But the cursor (point) moves to the end of end. I get no opportunity to specify the module name and also complete the module body.
When I disable eglot and use only elixir-mode I get the expected behaviour were selecting defmodule from the completion list places the cursor (point) between defmodule and do where I type the module name then another tab places the cursor inside the module body.
What is the way to work with what seems to be eglot’s way of code completion?
Marked As Solved
mpmiszczyk
I run into same issue with my Emacs setup, and I was able to solve it.
Based on the github issue I was able to deduce that Eglot upon start communicates to Language Server that he supports snippets, and I would guess, that based on this start-up info it will either try to pass it into snippet engine or not. You could look into your *EGLOT (....) events* buffer; find first message ( with M-<), and verify your settings.
client-request (id:1) Fri Jan 31 00:35:47 2020:
(:jsonrpc "2.0" :id 1 :method "initialize" :params
(:processId 14783 :rootPath ....
(:workspace
......
(:dynamicRegistration :json-false :completionItem
(:snippetSupport t)
:contextSupport t)
I was able to achieve such setup by installing Yasnippets, and turning them on in elixir-mode
(use-package elixir-mode)
(use-package eglot
:commands (eglot eglot-ensures)
:hook
(elixir-mode . eglot-ensure)
(before-save . eglot-format-buffer)
:config
(add-to-list
`eglot-server-programs `(elixir-mode ,(expand-file-name "~/elixir_ls/release/language_server.sh"))))
(use-package yasnippet
:hook (elixir-mode . yas-minor-mode))
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Pilgrim
@rodrigues can I take a look around your emacs.d? My company config is really simple below and I spent hours going over it without success.
;; Company mode
(add-to-list 'completion-styles 'initials t)
(use-package company
:ensure t
:hook (after-init . global-company-mode)
:init
(setq company-minimum-prefix-length 2)
;;(setq company-auto-complete nil)
(setq company-idle-delay 0)
(setq company-require-match 'never)
(setq-default company-dabbrev-other-buffers 'all
company-tooltip-align-annotations t)
(setq tab-always-indent 'complete)
;;(defvar completion-at-point-functions-saved nil)
:config
(define-key company-mode-map (kbd "M-/") 'company-complete)
(define-key company-active-map (kbd "C-n") 'company-select-next)
(define-key company-active-map (kbd "C-p") 'company-select-previous))
Eglot currently is setup like so
(use-package eglot
:ensure t)
and Elixir’s looks like this:
(use-package elixir-mode
:after (company flycheck)
:ensure t
:init
;;(add-to-list 'exec-path "/Users/napo/Github/elixir-ls/release")
(add-to-list 'eglot-server-programs '(elixir-mode . ("/Users/napo/Github/elixir-ls/release/language_server.sh")))
;;(add-hook 'elixir-mode-hook #'lsp)
(add-hook 'elixir-mode-hook 'eglot-ensure)
(add-hook 'elixir-mode-hook 'flycheck-mode)
(add-hook 'elixir-mode-hook #'smartparens-mode)
(add-hook 'elixir-mode-hook
(lambda () (add-hook 'before-save-hook 'eglot-format nil t))))
rodrigues
@Pilgrim my emacs.d repo gets constantly rebased with https://github.com/purcell/emacs.d
Other than that, that’s my only company specific custom config:
(add-hook 'after-init-hook 'global-company-mode)
(setq company-dabbrev-downcase 0)
(setq company-idle-delay 0)
As for eglot/elixir, there it is, at the moment:
(require-package 'elixir-mode)
(require-package 'eglot)
(require 'eglot)
(require 'eldoc-box)
(add-to-list
'eglot-server-programs
'(elixir-mode . ("sh" "/Users/rodrigues/code/elixir-ls/release/language_server.sh")))
(add-hook
'elixir-mode-hook
(lambda ()
(subword-mode)
(eglot-ensure)
(company-mode)
(flymake-mode)
(add-hook 'before-save-hook 'eglot-format nil t)))
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