;;; 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:

(use-package eshell
  :commands eshell
  :bind ("C-c a s e" . eshell)
  :config
  (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-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)
    (bind-keys :map eshell-mode-map
               ("C-d"   . b/eshell-quit-or-delete-char)
               ("C-S-l" . b/eshell-clear)
               ("M-r"   . counsel-esh-history)
               ;; ([tab]   . company-complete)
               :map eshell-hist-mode-map
               ("M-r" . counsel-esh-history)))

  (setq
   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))))

  :hook (eshell-mode . b/eshell-setup)
  :custom
  (eshell-hist-ignoredups t)
  (eshell-input-filter 'eshell-input-filter-initial-space))

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