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

;; Copyright (C) 2018-2020  Amin Bandali

;; 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 awesome Eshell setup.

;;; Code:

(with-eval-after-load 'eshell
  (make-directory (b/etc "eshell/") t)
  (csetq
   eshell-aliases-file (b/etc "eshell/aliases")
   eshell-directory-name (b/var "eshell/")
   eshell-hist-ignoredups t
   eshell-input-filter #'eshell-input-filter-initial-space
   eshell-prompt-regexp "\\(.*\n\\)*[$#] "
   eshell-prompt-function
   (lambda ()
     (concat
      (propertize (format "%s@%s:" (user-login-name) (system-name))
                  'face 'default)
      (propertize (abbreviate-file-name default-directory)
                  'face 'font-lock-comment-face)
      (propertize "\n" 'face 'default)
      (if (= (user-uid) 0)
          (propertize "#" 'face 'red)
        (propertize "$" 'face 'default))
      (propertize " " 'face 'default))))
  (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))
  (defun b/eshell-history ()
    (interactive)
    (completing-read "Eshell history: "
                     (ring-elements eshell-history-ring)))
  (defun b/eshell-setup ()
    (make-local-variable 'company-idle-delay)
    (defvar company-idle-delay)
    (eval-when-compile
      (defvar eshell-mode-map)
      (defvar eshell-hist-mode-map))
    (setq company-idle-delay nil)
    ;; local key bindings
    (define-key eshell-mode-map (kbd "C-d")
      #'b/eshell-quit-or-delete-char)
    (define-key eshell-mode-map (kbd "C-S-l")
      #'b/eshell-clear)
    (define-key eshell-hist-mode-map (kbd "M-r")
      #'b/eshell-history)))
;; global key bindings
(global-set-key (kbd "C-c a s e") #'eshell)
;; hooks
(add-hook 'eshell-mode-hook #'b/eshell-setup)

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