;;; bandali-eshell.el --- bandali's Eshell setup -*- lexical-binding: t; -*-

;; Copyright (C) 2018-2025 Amin Bandali <bandali@gnu.org>

;; Author: Amin Bandali <bandali@gnu.org>
;; Keywords: processes

;; 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:

;; My humble Eshell setup.

;;; Code:

(with-eval-after-load 'eshell
  (setopt
   eshell-hist-ignoredups t
   eshell-input-filter #'eshell-input-filter-initial-space
   eshell-prompt-regexp "^[^#$\n]* [#$] ; "
   eshell-prompt-function
   (lambda ()
     (let ((uid (if (functionp #'file-user-uid)
                    #'file-user-uid   ; (version<= "30" emacs-version)
                  #'user-uid)))       ; (version< emacs-version "30")
       (concat ": "
               (system-name)
               ":"
               (abbreviate-file-name (eshell/pwd))
               (unless (eshell-exit-success-p)
                 (format " [%d]" eshell-last-command-status))
               (if (= (funcall uid) 0) " # " " $ ")
               "; "))))

  ;; `esh-mode'
  (eval-when-compile
    (defvar eshell-prompt-regexp)
    (declare-function eshell-life-is-too-much "esh-mode")
    (declare-function eshell-send-input "esh-mode"
                      (&optional use-region queue-p no-newline)))
  (defun b/eshell-quit-or-delete-char (arg)
    (interactive "p")
    (if (and (eolp) (looking-back eshell-prompt-regexp nil))
        (eshell-life-is-too-much)
      (delete-char arg)))
  (defun b/eshell-clear ()
    (interactive)
    (let ((inhibit-read-only t))
      (erase-buffer))
    (eshell-send-input))
  (with-eval-after-load 'esh-mode
    (let ((m eshell-mode-map))
      (b/keymap-set m "C-d" #'b/eshell-quit-or-delete-char)
      (b/keymap-set m "C-S-l" #'b/eshell-clear)))

  ;; `esh-hist'
  (defun b/eshell-history ()
    (interactive)
    (completing-read "Eshell history: "
                     (ring-elements eshell-history-ring)))
  (with-eval-after-load 'esh-hist
    (let ((m eshell-hist-mode-map))
      (b/keymap-set m "M-r" #'b/eshell-history))))
(b/keymap-global-set "C-c s e" #'eshell)

(provide 'bandali-eshell)
;;; bandali-eshell.el ends here