Reconfigure Elixir LSP server a little bit

lisp/icejam-eglot.el

@@ -3,10 +3,44 @@
 ;;; Global Language Server Protocol Config
 ;;; Code:
 
+(eval-when-compile
+  (declare-function eglot-completion-at-point 'eglot)
+  (declare-function eglot-managed-p 'eglot))
+
 (use-package eglot :ensure nil
   :config
   ;; Use Ruby-Lsp instead of Solargraph
-  (add-to-list 'eglot-server-programs '((ruby-mode ruby-ts-mode) "ruby-lsp")))
+  (add-to-list 'eglot-server-programs '((ruby-mode ruby-ts-mode) "ruby-lsp"))
+
+  (setopt eglot-advertise-cancellation t)
+
+  ;; Automatically kill eglot when last buffer associated with a project is
+  ;; closed.
+  (setopt eglot-autoshutdown t)
+
+  ;; Set up server specific switches globally
+  (setq-default eglot-workspace-configuration
+                ;; Elixir configuration
+                '(:elixirLS (
+                             :autoBuild t
+                             :dialyzerEnabled t
+                             :incrementalDialyzer :json-false
+                             :autoInsertRequiredAlias :json-false
+                             :suggestSpecs t
+                             )))
+
+  ;; Eglot insists on adding itself to the completion-at-point-functions but
+  ;; that means that it overrides our combined value of (eglot + yasnippet)
+  (add-hook 'eglot-managed-mode-hook
+            (lambda ()
+              (when eglot--managed-mode
+                (remove-hook 'completion-at-point-functions
+                             #'eglot-completion-at-point t)))))
+
+(defun icejam-start-eglot ()
+  "Start eglot unless already started."
+  (unless (eglot-managed-p)
+    (eglot-ensure)))
 
 (use-package eldoc-box
   :ensure (:host github :repo "casouri/eldoc-box")