Place temporary files in a dir in HOME instead of littering PWD

config.org

@@ -635,3 +635,24 @@
     #+begin_src emacs-lisp
       (use-package meson-mode)
     #+end_src
+
+* Backup and Autosave
+** Keep $PWD Tidy
+   Emacs' default behaviour of dumping temporary files in the current
+   directory is quite a pain, so we want to get it to instead stick
+   them in a dedicated directory somewhere far away.
+
+   We can do that for auto-save files by setting the variable
+   [[help:auto-save-file-name-transforms][auto-save-file-name-transforms]]:
+
+   #+begin_src emacs-lisp
+     (make-directory "~/.emacs-tmp/auto-save" t)
+     (setq auto-save-file-name-transforms '((".*" "~/.emacs-tmp/auto-save" t)))
+   #+end_src
+
+   And for backup files there's [[help:backup-directory-alist][backup-directory-alist]].
+
+   #+begin_src emacs-lisp
+     (make-directory "~/.emacs-tmp/backup" t)
+     (setq backup-directory-alist '(("." . "~/.emacs-tmp/backup")))
+   #+end_src