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;;; eshell-additions.el --- Some aliases for Eshell -*- lexical-binding: t; -*-
;; Copyright (C) 2024 Aryadev Chavali
;; Author: Aryadev Chavali <aryadev@aryadevchavali.com>
;; Keywords:
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License Version
;; 2 as published by the Free Software Foundation.
;; 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:
;;
;;; Code:
(autoload #'eshell "eshell")
(autoload #'eshell/cd "eshell")
(autoload #'eshell/echo "eshell")
(autoload #'eshell/send-input "eshell")
;; Aliases
(defun eshell/goto (&rest args)
"Use `read-directory-name' to change directories"
(let* ((name (read-file-name "Choose file: "))
(dir (file-name-directory name)))
(eshell/cd (list dir))
(if (not (file-directory-p name))
(find-file name))))
(defun eshell/project-root (&rest args)
"Change to directory `project-root'"
(if (project-current)
(eshell/cd (list (project-root (project-current))))
(setq eshell-last-command-status 1)
(eshell/echo
(format "[%s]: No project in current directory"
(propertize "Error" 'font-lock-face '(:foreground "red"))))))
(defun eshell/sudo-switch (&rest args)
"Switch to and from administrative (sudo) mode in Eshell.
Uses tramp to figure out if we're in sudo mode or not. "
(let ((user (file-remote-p default-directory 'user)))
(cond
((null user)
(let ((wrapped-dir (concat "/sudo::" default-directory)))
(eshell/cd wrapped-dir)))
((string= user "root")
(eshell/cd (file-remote-p default-directory 'localname))))))
;; Additional functions
(defun +eshell/--current-instances ()
(cl-loop for buffer being the buffers
if (with-current-buffer buffer
(eq major-mode 'eshell-mode))
collect
(cons (buffer-name buffer) buffer)))
(defun +eshell/--choose-instance ()
(let* ((current-instances (+eshell/--current-instances))
(answer (completing-read "Enter name: " (mapcar #'car current-instances)))
(result (assoc answer current-instances)))
(cond
(result (switch-to-buffer (cdr result))
(cdr result))
((not (string= answer ""))
(let ((eshell-buffer-name (format "*%s-eshell*" answer)))
(eshell nil)))
(t
(eshell)))))
(defun +eshell/open (&optional arg)
"Open an instance of EShell, displaying it.
Numeric arguments passed into `+eshell/open' are reduced by 1 i.e. C-u 1
+eshell/open will map to the default eshell instance, C-u 2 +eshell/open
will map to the next labelled eshell instance, etc.
Any numeric or null argument is passed to the `eshell' function.
Otherwise, if C-u is used, you can select an instance to spawn."
(interactive "P")
(cond
((null arg) (eshell))
((numberp arg)
(if (= arg 1)
(eshell nil)
(eshell (1- arg))))
(t (+eshell/--choose-instance))))
(defun +eshell/at-cwd (&optional arg)
"Open an instance of eshell at the current working directory.
Pass argument to `+eshell/open'."
(interactive "P")
(let ((dir (if buffer-file-name
(file-name-directory buffer-file-name)
default-directory))
(buf (+eshell/open arg)))
(with-current-buffer buf
(eshell/cd dir)
(eshell-send-input))))
(provide 'eshell-additions)
;;; eshell-additions.el ends here
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