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;;; jao-dirmon.el --- little utility to monitor disk usage -*- lexical-binding: t; -*-
;; Copyright (C) 2022 jao
;; Author: jao <mail@jao.io>
;; Keywords: tools
;; 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:
;; What directories suddenly increased their size?
;;; Code:
(require 'multisession)
(require 'jao-shell)
(define-multisession-variable jao-dirmon-last '())
(defun jao-dirmon-dirs ()
(jao-shell-cmd-lines "find ~ -mindepth 2 -maxdepth 3 -type d"))
(defun jao-dirmon-sizes ()
(mapcar (lambda (f)
(let ((x (split-string (jao-shell-string "du -BM -s" f))))
(cons (cadr x) (string-to-number (car x)))))
(jao-dirmon-dirs)))
(defvar jao-dirmon-threshold 100)
(defvar jao-dirmon-last-delta nil)
(defun jao-dirmon--show-deltas (old current deltas)
(with-temp-buffer
(insert "High deltas since " (car old) "\n\n")
(dolist (d (seq-sort-by #'cdr #'> deltas))
(insert (format "- %s: %s Mb\n" (car d) (cdr d))))
(insert "\n\nSizeable dirs\n\n")
(let ((threshold (* 10 jao-dirmon-threshold)))
(dolist (c (seq-take-while (lambda (x) (> (cdr x) threshold))
(seq-sort-by #'cdr #'> current)))
(insert (format "- %s: %s Mb\n" (car c) (cdr c)))))
(beginning-of-buffer)
(pop-to-buffer (current-buffer) nil t)
(when (y-or-n-p "Save current state?")
(setf (multisession-value jao-dirmon-last)
(cons (current-time-string) current)))))
;;;###autoload
(defun jao-dirmon-report ()
(interactive)
(let ((old (multisession-value jao-dirmon-last))
(current (jao-dirmon-sizes))
(high ()))
(dolist (c current)
(let ((d (- (cdr c) (alist-get (car c) old 0 nil #'string=))))
(when (> (abs d) jao-dirmon-threshold)
(push c high))))
(setq jao-dirmon-last-delta high)
(jao-dirmon--show-deltas old current jao-dirmon-last-delta)
jao-dirmon-last-delta))
(provide 'jao-dirmon)
;;; jao-dirmon.el ends here
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