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;;; +scratch.el --- *scratch* improvements -*- lexical-binding: t; -*-
;; Copyright (C) 2023 Case Duckworth
;; Author: Case Duckworth <case@acdw.net>
;; Keywords: convenience
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(defcustom +scratch-save-dir (locate-user-emacs-file "scratch.d")
"Where to save scratch files."
:type 'file)
(defcustom +scratch-max-age (* 60 60 24 365)
"Maximum age of a saved scratch buffer. Default: one year."
:type 'natnum)
(defun +scratch@immortal ()
"Don't kill *scratch* with `kill-buffer'."
(if (equal (buffer-name) "*scratch*")
(progn (bury-buffer) nil)
t))
(defun +scratch-save (time-format)
"Save *scratch* buffer to `+scratch-save-dir'.
TIME-FORMAT will be used to name the buffer."
(interactive (list "%FT%H%z"))
(with-current-buffer (get-scratch-buffer-create)
(let ((buffer-file-name (expand-file-name (format "%s.%s"
(format-time-string
time-format)
(pcase major-mode
('org-mode "org")
('emacs-lisp-mode "el")
(_ "txt")))
+scratch-save-dir)))
(unless (string-equal (buffer-substring (point-min) (point-max))
initial-scratch-message)
(save-buffer 0)))))
(defun +scratch-save-on-exit ()
(+scratch-save "%FT%T%z")
(+scratch-clean))
(defun +scratch-clean ()
"Clean up saved scratches.
Scratch files older than `+scratch-max-age' will be removed."
(dolist (f (directory-files +scratch-save-dir))
(when (and (not (equal f "."))
(not (equal f ".."))
(> (time-convert (file-attribute-modification-time
(file-attributes f))
'integer)
+scratch-max-age))
(delete-file (expand-file-name f +scratch-save-dir) :trash))))
(provide '+scratch)
;;; +scratch.el ends here
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