You mean
(add-hook 'elixir-mode-hook
(lambda () (add-hook 'before-save-hook 'elixir-format nil t)))
in your dotspacemacs/user-config ?
kpanic
joaothallis
Yes, this work but sometimes no work.
If no work, I use SPC p ! and I execute mix format.
freewebwithme
I am using elixir ls and lsp mode but linting seems not working.
how do I enable code linting ?
wittjosiah
Aduril
Do you mean linting like autoformatting on save?
Then, I think you want to add the following to your dotspacemacs/user-config
(add-hook 'elixir-mode-hook
(lambda ()
(add-hook 'before-save-hook #'lsp-format-buffer nil t)
))
This will add a hook that will perform a lsp-format-buffer before saving the file.
If that does not work check if SPC SPC lsp-format-buffer lints your buffer.
For lsp-Integration and code suggestions I think the following lines helped me to allow my lsp to watch all files, prefer flycheck instead of flymake and enable its lsp integration.
'(lsp-file-watch-threshold 3000)
'(lsp-prefer-flymake nil)
'(lsp-ui-flycheck-enable t)
My current setup looks like this:
Is that what you want?
Does this help you?
freewebwithme
Thanks for your help.
This is my setup.
And it doesn’t look like ‘before-save-hook’ working.
It doesn’t display error before save.
Aduril
argh, sry
sometimes I should read my own comments, before talking smart 
I also set a hook to set the checkers for flycheck
My whole config regarding elixir-lsp:
;; dotspacemacs-configuration-layers
(elixir :variables elixir-backend 'lsp)
...
;; dotspacemacs/user-config
(use-package lsp-mode
:commands lsp
:ensure t
:diminish lsp-mode
:hook
(elixir-mode . lsp)
:init
(add-to-list 'exec-path "~/Repositories/Other/elixir-ls/release"))
;; flycheck does static code analytics - we need to add credo to it
(add-hook 'lsp-after-initialize-hook
(lambda () (flycheck-add-next-checker 'lsp-ui 'elixir-credo)))
;; adds a hook that formats the code
(add-hook 'elixir-mode-hook
(lambda ()
(add-hook 'before-save-hook #'lsp-format-buffer nil t)
))
I also recommend to see if the message buffer (SPC b m) has anything to say regarding the lsp
dimitarvp
Yes, it does:
LSP :: No formatting changes provided
The hook to format code on save doesn’t work for me on .exs files, how can I fix it? The .ex file formatting on save does work though:
LSP :: Applying 1 edits to `repo.ex' ...
Applying 1 edits to `repo.ex' ...done
Aduril
Mh,
strange…
I just tried that and when I create a new file I’ve got the same problem like you.
However, after lsp-restart-workspace it worked as it should. Maybe the language server is running stale after some time and does not include the right file? Is there any command to force “add” a buffer to a lsp session?
Oh, and does lsp-format-buffer do anything for you?
dimitarvp
Yes, it formats the .exs file properly.
Same.
After restarting Emacs it seems that using the restart workspace trick isn’t needed now. But I am sure I didn’t open the files I had opened before in the same order.
In any case, so far so good. I’ll report again if I stumble upon the problem again.
@Aduril thank you!