Moving to Doom Emacs!

.emacs.d/modules/ui/hl-todo/README.org

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+#+TITLE: :ui hl-todo
+
+This module adds syntax highlighting for TODO/FIXME/NOTE tags in programming major-modes.
+
+What keywords are highlighted (and their color) can be customized through ~hl-todo-keyword-faces~.
+
+#+BEGIN_SRC emacs-lisp
+;; the default
+(setq hl-todo-keyword-faces
+      `(("TODO"  . ,(face-foreground 'warning))
+        ("FIXME" . ,(face-foreground 'error))
+        ("NOTE"  . ,(face-foreground 'success))))
+#+END_SRC

.emacs.d/modules/ui/hl-todo/config.el

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+;;; ui/hl-todo/packages.el -*- lexical-binding: t; -*-
+
+(use-package! hl-todo
+  :hook (prog-mode . hl-todo-mode)
+  :config
+  (setq hl-todo-highlight-punctuation ":"
+        hl-todo-keyword-faces
+        `(("TODO"       warning bold)
+          ("FIXME"      error bold)
+          ("HACK"       font-lock-constant-face bold)
+          ("REVIEW"     font-lock-keyword-face bold)
+          ("NOTE"       success bold)
+          ("DEPRECATED" font-lock-doc-face bold)))
+
+  ;; Use a more primitive todo-keyword detection method in major modes that
+  ;; don't use/have a valid syntax table entry for comments.
+  (add-hook! '(pug-mode-hook haml-mode-hook)
+    (defun +hl-todo--use-face-detection-h ()
+      "Use a different, more primitive method of locating todo keywords."
+      (set (make-local-variable 'hl-todo-keywords)
+           '(((lambda (limit)
+                (let (case-fold-search)
+                  (and (re-search-forward hl-todo-regexp limit t)
+                       (memq 'font-lock-comment-face (doom-enlist (get-text-property (point) 'face))))))
+              (1 (hl-todo-get-face) t t))))
+      (when hl-todo-mode
+        (hl-todo-mode -1)
+        (hl-todo-mode +1)))))

.emacs.d/modules/ui/hl-todo/packages.el

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+;; -*- no-byte-compile: t; -*-
+;;; ui/hl-todo/packages.el
+
+(package! hl-todo)