Add no-littering which no longer manually maintain a etc/var dir

.gitignore

@@ -3,9 +3,7 @@
 
 # emacs
 auto-save-list
-tramp
 eln-cache/
-server/
 
 # backup
 *.*~

cats/+default.el

@@ -1,5 +1,13 @@
 ;; -*- lexical-binding: t; -*-
 
+(use-package no-littering
+  :demand
+  :init
+  (setq no-littering-etc-directory cat-etc-dir
+        no-littering-var-directory cat-cache-dir)
+  :config
+  (no-littering-theme-backups))
+
 ;;; ui
 (blink-cursor-mode 0)
 (scroll-bar-mode 0)
@@ -72,9 +80,6 @@
 ;;; url
 (setq url-configuration-directory (concat cat-etc-dir "url/"))
 
-;;; bookmarks
-(setq bookmark-default-file (expand-file-name "bookmarks" cat-etc-dir))
-
 ;;; minibuffer
 (setq enable-recursive-minibuffers t
       confirm-kill-emacs #'yes-or-no-p)
@@ -172,25 +177,16 @@
   (type-break-mode . type-break-query-mode)
   (type-break-mode . type-break-mode-line-message-mode)
   :custom
-  (type-break-file-name (concat cat-etc-dir "type-break"))
   (type-break-query-function #'y-or-n-p)
   (type-break-good-break-interval 300)
   :config
   (type-break-guesstimate-keystroke-threshold 30))
 
-;;; time
-(setq timeclock-file (concat cat-etc-dir "timelog"))
-
 (use-package epg-config
   :ensure nil
   :custom
   (epg-pinentry-mode 'loopback))
 
-(use-package abbrev
-  :ensure nil
-  :custom
-  (abbrev-file-name (concat cat-etc-dir "abbrev_defs")))
-
 (use-package ansi-color
   :ensure nil
   :hook (compilation-filter . ansi-color-compilation-filter))
@@ -199,13 +195,6 @@
   :ensure nil
   :delight (compilation-shell-minor-mode " "))
 
-(use-package transient
-  :pin melpa
-  :custom
-  (transient-levels-file (concat cat-etc-dir "transient/levels"))
-  (transient-values-file (concat cat-etc-dir "transient/values"))
-  (transient-history-file (concat cat-etc-dir "transient/history")))
-
 (use-package profiler
   :ensure nil
   :pretty-hydra

cats/+doc.el

@@ -43,9 +43,7 @@ Intended for `eldoc-documentation-functions' (which see)."
   :hook ((conf-toml-mode
           toml-ts-mode). eldoc-toml-mode))
 
-(use-package devdocs
-  :custom
-  (devdocs-data-dir (concat cat-etc-dir "devdocs")))
+(use-package devdocs)
 
 (defvar-keymap cat-dev-doc-map
   :doc "Keymap for `devdocs-mode' commands."

cats/+eudc.el

@@ -1,7 +1,5 @@
 ;; -*- lexical-binding: t; -*-
 
-(setq eudc-options-file (expand-file-name "eudc-options" cat-etc-dir))
-
 (with-eval-after-load "message"
   (define-key message-mode-map [(control ?c) (tab)] 'eudc-expand-try-all))
 (with-eval-after-load "sendmail"

cats/+log.el

@@ -6,7 +6,6 @@
   :custom
   (datetime-timezone 'Asia/Shanghai)
   (logview-cache-filename (concat cat-cache-dir "logview-cache.extmap"))
-  (logview-views-file (concat cat-etc-dir "logview.views"))
   (logview-additional-timestamp-formats
    '(("LogCat"
       (java-pattern . "MM-dd HH:mm:ss.SSS"))

cats/+lsp.el

@@ -1,8 +1,6 @@
 ;; -*- lexical-binding: t; -*-
 
 (use-package lsp-mode
-  :custom
-  (lsp-session-file (concat cat-etc-dir "lsp-session"))
   :hook
   (lsp-mode . lsp-enable-which-key-integration)
   :commands lsp)

cats/+magit.el

@@ -12,6 +12,4 @@
 
 (use-package forge
   :demand t
-  :after magit
-  :custom
-  (forge-database-file (concat cat-etc-dir "forge.db")))
+  :after magit)

cats/+org-roam.el

@@ -4,7 +4,6 @@
   :commands #'org-roam-buffer-toggle
   :custom
   (org-roam-directory cat-org-roam-directory)
-  (org-roam-db-location (expand-file-name "org-roam.db" cat-etc-dir))
   (org-roam-completion-everywhere t)
   (org-roam-node-display-template (concat "${type:10} " (propertize "${tags:15} " 'face 'org-tag) "${title:*} "))
   (org-roam-mode-section-functions (list #'org-roam-backlinks-section

cats/+org.el

@@ -132,11 +132,6 @@
                                    ("*" . "+")
                                    ("1." . "a."))))
 
-(use-package org-id
-  :ensure nil
-  :custom
-  (org-id-locations-file (expand-file-name "org-id-locations" cat-etc-dir)))
-
 (use-package org-indent
   :ensure nil
   :delight  " 󰉶")
@@ -150,7 +145,6 @@
   :ensure nil
   :custom
   (org-clock-persist 'history)
-  (org-clock-persist-file (expand-file-name "org-clock-save.el" cat-etc-dir))
   (org-clock-clocked-in-display 'frame-title))
 
 (use-package org-timer

cats/+undo.el

@@ -1,8 +1,6 @@
 ;; -*- lexical-binding: t; -*-
 
 (use-package undo-fu-session
-  :custom
-  (undo-fu-session-directory (concat cat-etc-dir "undo-fu-session"))
   :hook (after-init . undo-fu-session-global-mode))
 
 (use-package vundo

cats/+workspace.el

@@ -83,7 +83,6 @@
   :custom
   (tabspaces-include-buffers nil)
   (tabspaces-initialize-project-with-todo nil)
-  (tabspaces-session-file (concat cat-etc-dir "tabsession.el"))
   :pretty-hydra
   ((:color teal :title (+with-icon "nf-md-tab" "Tabspaces"))
    ("Buffer"