Move OS constants to core/core.el

So it is universally available to all of Doom, rather than excluding
sessions that haven't called doom-initialize interactively.

core/core-os.el

@@ -1,10 +1,5 @@
 ;;; core-os.el -*- lexical-binding: t; -*-
 
-(defconst IS-MAC     (eq system-type 'darwin))
-(defconst IS-LINUX   (eq system-type 'gnu/linux))
-(defconst IS-WINDOWS (memq system-type '(cygwin windows-nt ms-dos)))
-
-(unless noninteractive
 ;; clipboard
 (setq x-select-request-type '(UTF8_STRING COMPOUND_TEXT TEXT STRING)
       ;; Use a shared clipboard
@@ -51,7 +46,7 @@
 
       (IS-WINDOWS
        (setq w32-get-true-file-attributes nil) ; fix file io slowdowns
-         )))
+       ))
 
 (provide 'core-os)
 ;;; core-os.el ends here

core/core-packages.el

@@ -286,10 +286,10 @@ to least)."
       (unless (or force-p noninteractive)
         (doom//reload-package-autoloads))))
   ;; Initialize Doom core
-  (require 'core-os)
   (unless noninteractive
     (add-hook! 'emacs-startup-hook
       #'(doom|post-init doom|display-benchmark))
+    (require 'core-os)
     (require 'core-ui)
     (require 'core-editor)
     (require 'core-projects)

core/core.el

@@ -16,6 +16,10 @@ line or use --debug-init to enable this.")
   (eval-when-compile (not (version< emacs-version "26"))))
 (defconst EMACS27+
   (eval-when-compile (not (version< emacs-version "27"))))
+(defconst IS-MAC     (eq system-type 'darwin))
+(defconst IS-LINUX   (eq system-type 'gnu/linux))
+(defconst IS-WINDOWS (memq system-type '(cygwin windows-nt ms-dos)))
+
 
 ;;
 (defvar doom-emacs-dir