add `doom/large-file-check to prompt literal open of large files

core/core-editor.el

@@ -1,5 +1,16 @@
 ;;; core-editor.el --- filling the editor shaped hole in the Emacs OS
 
+
+(defvar doom-large-file-size 1
+  "Size (in MB) above which the user will be propmpted to open the file literally to avoid
+  performance issues. Opening literally means that no major or minor modes are active and
+  the buffer is readonly.")
+
+(defvar doom-large-file-modes-list 
+  '(archive-mode tar-mode jka-compr git-commit-mode image-mode
+    doc-view-mode doc-view-mode-maybe ebrowse-tree-mode pdf-view-mode)
+  "Major modes which `doom/check-large-file' will not be automatically applied to")
+
 (setq-default
  ;; Save clipboard contents into kill-ring before replacing them
  save-interprogram-paste-before-kill t
@@ -88,6 +99,9 @@
       (insert linestr))))
 (advice-add #'delete-trailing-whitespace :around #'doom*delete-trailing-whitespace)
 
+;; automatically check for large files and optionally prompt to open literally
+(add-hook 'find-file-hook 'doom/check-large-file)
+
 
 ;;
 ;; Core Plugins