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;;; acdw-shell.el ---Shell config -*- lexical-binding: t; -*-

;;; Code:

(defvar eshell-buffer-format "*eshell:%s*"
  "Format for eshell buffer names.")

(defun eshell-rename-pwd ()
  (rename-buffer (format eshell-buffer-format default-directory) t))

(defun eshell-last-dir ()
  (goto-char (point-max))
  (insert "cd -")
  (eshell-send-input))

(defun eshellp (buffer-or-name)
  (with-current-buffer buffer-or-name
    (derived-mode-p 'eshell-mode)))

(defun +eshell (&optional new)
  (interactive "P")
  (let ((dir default-directory)
        (bname (format eshell-buffer-format default-directory))
        (display-comint-buffer-action 'pop-to-buffer))
    (if-let ((buf (and (not new)
                       (or (get-buffer bname)
                           (seq-find #'eshellp
                                     (reverse (buffer-list)))))))
        (pop-to-buffer buf)
      (eshell new))
    (eshell-rename-pwd)
    (unless (equal default-directory dir)
      (eshell/cd dir)
      (eshell-send-input)
      (goto-char (point-max)))))

(defun +eshell-quit (&optional choose)
  (interactive "P")
  (if choose
      (let* ((bufs (mapcar #'buffer-name
                           (seq-filter #'eshellp
                                       (buffer-list))))
             (buf (get-buffer
                   (completing-read "Eshell: "
                                    bufs nil t nil nil (car bufs)))))
        (quit-window)
        (pop-to-buffer buf))
    (quit-window)))

(defun acdw/eshell-prompt ()
  "My custom eshell prompt."
  (concat (if (= 0 eshell-last-command-status)
              "^_^ "
            ";_; ")
   (abbreviate-file-name (eshell/pwd))
   (if (= (user-uid) 0) " # " " $ ")))


;;; Packages

(use-package eshell
  :init
  (add-hook 'eshell-post-command-hook #'eshell-rename-pwd)
  (setopt eshell-modules-list
          '(eshell-alias
            eshell-basic
            eshell-cmpl
            eshell-dirs
            eshell-elecslash
            eshell-hist
            eshell-ls
            eshell-prompt
            eshell-smart
            eshell-extpipe
            eshell-glob
            eshell-hist
            eshell-ls
            eshell-pred
            eshell-prompt
            eshell-script
            eshell-term
            eshell-unix))
  :commands eshell
  :bind (("C-z" . +eshell)
         :map eshell-mode-map
         ("C-z" . +eshell-quit)
         ("C-o" . eshell-last-dir))
  :config
  (require 'esh-module)
  (require 'em-smart)
  (require 'em-tramp)
  (setopt eshell-destroy-buffer-when-process-dies t
          eshell-error-if-no-glob t
          eshell-hist-ignoredups t
          eshell-kill-on-exit t
          eshell-prefer-lisp-functions t
          eshell-prefer-lisp-variables t
          eshell-scroll-to-bottom-on-input 'this
          eshell-banner-message ""
          eshell-hist-ignoredups 'erase
          eshell-history-size 512
          eshell-input-filter (lambda (input)
                                (or (eshell-input-filter-default input)
                                    (eshell-input-filter-initial-space input)))
          eshell-prompt-function #'acdw/eshell-prompt)
  (add-hook 'eshell-mode-hook
            (defun eshell-setup ()
              (hungry-delete-mode -1)
              (setq-local outline-regexp eshell-prompt-regexp
                          page-delimiter eshell-prompt-regexp
                          imenu-generic-expression
                          '(("Prompt" " $ \\(.*\\)" 1))
                          truncate-lines t)
              (setenv "PAGER" "cat"))))

(use-package eat
  :ensure t
  :hook (eshell-load-hook . eat-eshell-mode))

(use-package exec-path-from-shell
  :when (eq system-type 'gnu/linux)
  :ensure t
  :config
  (add-to-list 'exec-path-from-shell-variables "SSH_AUTH_SOCK")
  (add-to-list 'exec-path-from-shell-variables "SSH_AGENT_PID")
  (add-to-list 'exec-path-from-shell-variables "GPG_AGENT_INFO")
  (add-to-list 'exec-path-from-shell-variables "LANG")
  (add-to-list 'exec-path-from-shell-variables "LC_CTYPE")
  (add-to-list 'exec-path-from-shell-variables "XDG_CONFIG_HOME")
  (add-to-list 'exec-path-from-shell-variables "XDG_CONFIG_DIRS")
  (add-to-list 'exec-path-from-shell-variables "XDG_DATA_HOME")
  (add-to-list 'exec-path-from-shell-variables "XDG_DATA_DIRS")
  (add-to-list 'exec-path-from-shell-variables "XDG_CACHE_HOME")
  (exec-path-from-shell-initialize))

(use-package eshell-bookmark
  :ensure t
  :hook (eshell-mode-hook . eshell-bookmark-setup))

(provide 'acdw-shell)
;;; acdw-shell.el ends here