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+;;; bandali-utils.el --- useful utilities            -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2020  Amin Bandali
+
+;; Author: Amin Bandali <bandali@gnu.org>
+;; Keywords: lisp, 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:
+
+;; A small collection of useful utilities used through my init files.
+
+;;; Code:
+
+(defmacro b/setq-every (value &rest vars)
+  "Set all the variables from VARS to value VALUE."
+  (declare (indent defun) (debug t))
+  `(progn ,@(mapcar (lambda (x) (list 'setq x value)) vars)))
+
+(defun b/start-process (program &rest args)
+  "Same as `start-process', but doesn't bother about name and buffer."
+  (let ((process-name (concat program "_process"))
+        (buffer-name  (generate-new-buffer-name
+                       (concat program "_output"))))
+    (apply #'start-process
+           process-name buffer-name program args)))
+
+(defun b/dired-start-process (program &optional args)
+  "Open current file with a PROGRAM."
+  ;; Shell command looks like this: "program [ARGS]... FILE" (ARGS can
+  ;; be nil, so remove it).
+  (declare-function dired-get-file-for-visit "dired")
+  (apply #'b/start-process
+         program
+         (remove nil (list args (dired-get-file-for-visit)))))
+
+(defun b/add-elisp-section ()
+  (interactive)
+  (insert "\n")
+  (forward-line -1)
+  (insert "\n\n;;; "))
+
+;; (defvar b/fill-column 47
+;;   "My custom `fill-column'.")
+
+(defconst b/asterism "* * *")
+
+(defun b/insert-asterism ()
+  "Insert a centred asterism."
+  (interactive)
+  (insert
+   (concat
+    "\n\n"
+    (make-string (floor (/ (- fill-column (length b/asterism)) 2))
+                 ?\s)
+    b/asterism
+    "\n\n")))
+
+(defun b/no-mouse-autoselect-window ()
+  "Conveniently disable `focus-follows-mouse'.
+For disabling the behaviour for certain buffers and/or modes."
+  (make-local-variable 'mouse-autoselect-window)
+  (setq mouse-autoselect-window nil))
+
+(defun b/kill-current-buffer ()
+  "Kill the current buffer."
+  ;; also see https://redd.it/64xb3q
+  (interactive)
+  (kill-buffer (current-buffer)))
+
+(defun b/move-indentation-or-beginning-of-line (arg)
+  "Move to the indentation or to the beginning of line."
+  (interactive "^p")
+  ;; (if (bolp)
+  ;;     (back-to-indentation)
+  ;;   (move-beginning-of-line arg))
+  (if (= (point)
+         (progn (back-to-indentation)
+                (point)))
+      (move-beginning-of-line arg)))
+
+(defun b/join-line-top ()
+  "Like `join-line', but join next line to the current line."
+  (interactive)
+  (join-line 1))
+
+(defun b/duplicate-line-or-region (&optional n)
+  "Duplicate the current line, or region (if active).
+Make N (default: 1) copies of the current line or region."
+  (interactive "*p")
+  (let ((u-r-p (use-region-p))          ; if region is active
+        (n1 (or n 1)))
+    (save-excursion
+      (let ((text
+             (if u-r-p
+                 (buffer-substring (region-beginning) (region-end))
+               (prog1 (thing-at-point 'line)
+                 (end-of-line)
+                 (if (eobp)
+                     (newline)
+                   (forward-line 1))))))
+        (dotimes (_ (abs n1))
+          (insert text))))))
+
+(provide 'bandali-utils)
+;;; bandali-utils.el ends here