fix: set tramp backup/autosave dirs in core

In 71eae25, TRAMP settings were moved to a new :emacs tramp module,
reverting `tramp-backup-directory-alist` and `tramp-auto-save-directory`
to their Emacs defaults for anyone not using this module (which saves
those temp files in the current working directory, which is an
undesirable default), so we set them in core again.

Fix: doomemacs/community#53
Amend: 71eae252ac

lisp/doom-editor.el

@@ -91,7 +91,8 @@ possible."
       delete-old-versions t ; clean up after itself
       kept-old-versions 5
       kept-new-versions 5
-      backup-directory-alist (list (cons "." (concat doom-cache-dir "backup/"))))
+      backup-directory-alist `(("." . ,(concat doom-cache-dir "backup/")))
+      tramp-backup-directory-alist backup-directory-alist)
 
 ;; But turn on auto-save, so we have a fallback in case of crashes or lost data.
 ;; Use `recover-file' or `recover-session' to recover them.
@@ -102,8 +103,8 @@ possible."
       auto-save-include-big-deletions t
       ;; Keep it out of `doom-emacs-dir' or the local directory.
       auto-save-list-file-prefix (concat doom-cache-dir "autosave/")
-      auto-save-file-name-transforms
-      (list (list ".*" auto-save-list-file-prefix t)))
+      auto-save-file-name-transforms `((".*" ,auto-save-list-file-prefix t))
+      tramp-auto-save-directory (concat doom-cache-dir "tramp-autosave/"))
 
 (add-hook! 'after-save-hook
   (defun doom-guess-mode-h ()

modules/emacs/tramp/config.el

@@ -13,9 +13,7 @@
         remote-file-name-inhibit-auto-save-visited t
         tramp-copy-size-limit (* 1024 1024) ; 1mb
         tramp-use-scp-direct-remote-copying t
-        tramp-completion-reread-directory-timeout 60
-        tramp-backup-directory-alist backup-directory-alist
-        tramp-auto-save-directory  (concat doom-cache-dir "tramp-autosave/"))
+        tramp-completion-reread-directory-timeout 60)
 
   (unless (featurep :system 'windows)
     ;; On windows pscp/scp > ssh, everywhere else ssh is better. sshx is even