pinwheel: Configure flycheck for emacs

hosts/pinwheel/modules/emacs/config.org

@@ -479,7 +479,34 @@ Setup prefix for keybindings.
 
 * Flycheck
 #+BEGIN_SRC emacs-lisp
-  (use-package flycheck)
+  (use-package flycheck
+    :preface
+    (defun mp-flycheck-eldoc (callback &rest _ignored)
+      "Print flycheck messages at point by calling CALLBACK."
+      (when-let ((flycheck-errors (and flycheck-mode (flycheck-overlay-errors-at (point)))))
+        (mapc
+         (lambda (err)
+           (funcall callback
+             (format "%s: %s"
+                     (let ((level (flycheck-error-level err)))
+                       (pcase level
+                         ('info (propertize "I" 'face 'flycheck-error-list-info))
+                         ('error (propertize "E" 'face 'flycheck-error-list-error))
+                         ('warning (propertize "W" 'face 'flycheck-error-list-warning))
+                         (_ level)))
+                     (flycheck-error-message err))
+             :thing (or (flycheck-error-id err)
+                        (flycheck-error-group err))
+             :face 'font-lock-doc-face))
+         flycheck-errors)))
+
+    (defun mp-flycheck-prefer-eldoc ()
+      (add-hook 'eldoc-documentation-functions #'mp-flycheck-eldoc nil t)
+      (setq eldoc-documentation-strategy 'eldoc-documentation-compose-eagerly)
+      (setq flycheck-display-errors-function nil)
+      (setq flycheck-help-echo-function nil))
+
+    :hook ((flycheck-mode . mp-flycheck-prefer-eldoc)))
 
   (use-package flycheck-eglot
     :after (flycheck eglot)
@@ -503,6 +530,12 @@ Setup prefix for keybindings.
         (add-hook 'before-save-hook #'eglot-format-buffer -10 t))))
 
   (use-package eglot
+    :preface
+    (defun mp-eglot-eldoc ()
+  	(setq eldoc-echo-area-use-multiline-p nil)
+      (setq eldoc-documentation-strategy
+        'eldoc-documentation-compose-eagerly))
+
     :config
     (add-to-list 'eglot-server-programs
       '(scala-mode .
@@ -523,6 +556,7 @@ Setup prefix for keybindings.
     )
 
     :hook (
+           (eglot-managed-mode . mp-eglot-eldoc)
            (go-mode . eglot-ensure)
            (go-mode . alex/organize-imports-on-save)
            (go-mode . alex/format-on-save)