Move things from init.el to acdw.el and acdw-eshell.el

Probably should've been 2 commits...

1 files changed, 94 insertions, 0 deletions

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+;;; acdw-eshell.el -*- lexical-binding: t; coding: utf-8-unix -*-
+
+;; Author: Case Duckworth <acdw@acdw.net>
+;; Keywords: configuration
+;; URL: https://tildegit.org/acdw/emacs
+
+;; This file is NOT part of GNU Emacs.
+
+;;; License:
+;; Everyone is permitted to do whatever with this software, without
+;; limitation.  This software comes without any warranty whatsoever,
+;; but with two pieces of advice:
+;; - Don't hurt yourself.
+;; - Make good choices.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'cl-lib)
+
+
+;;; Eshell starting and quitting
+
+;;;###autoload
+(defun eshell-quit-or-delete-char (arg)
+  "Delete the character to the right, or quit eshell on an empty line."
+  (interactive "p")
+  (if (and (eolp) (looking-back eshell-prompt-regexp))
+      (eshell-life-is-too-much)
+    (delete-forward-char arg)))
+
+;;;###autoload
+(defun eshell-pop-or-quit (&optional buffer-name)
+  "Pop open an eshell buffer, or if in an eshell buffer, bury it."
+  (interactive)
+  (if (eq (current-buffer) (get-buffer (or buffer-name "*eshell*")))
+      (eshell-life-is-too-much)
+    (with-message "Starting eshell"
+      (eshell))))
+
+
+;;; Insert previous arguments
+;; Record arguments
+
+(defvar eshell-arg-history nil)
+(defvar eshell-arg-history-index nil)
+(add-to-list 'savehist-additional-variables 'eshell-arg-history)
+
+(defun eshell-record-args (&rest _)
+  "Record unique arguments onto the front of `eshell-arg-history'."
+  (setq eshell-arg-history
+        (cl-loop with history = eshell-arg-history
+                 for arg in (reverse eshell-last-arguments)
+                 do (setq history (cons arg (remove arg history)))
+                 finally return history)))
+
+(defun eshell-insert-prev-arg ()
+  "Insert an argument from `eshell-arg-history' at point."
+  (interactive)
+  (if (eq last-command 'eshell-insert-prev-arg)
+      (progn
+        (let ((pos (point)))
+          (eshell-backward-argument 1)
+          (delete-region (point) pos))
+        (if-let ((text (nth eshell-arg-history-index
+                            eshell-arg-history)))
+            (progn
+              (insert text)
+              (cl-incf eshell-arg-history-index))
+          (insert (cl-first eshell-arg-history))
+          (setq eshell-arg-history-index 1)))
+    (insert (cl-first eshell-arg-history))
+    (setq eshell-arg-history-index 1)))
+
+(add-hook 'eshell-mode-hook
+          (lambda ()
+            (add-hook 'eshell-post-command-hook
+                      #'eshell-record-args nil t)
+            (local-set-key (kbd "M-.") #'eshell-insert-prev-arg)))
+
+;;;###autoload
+(define-minor-mode eshell-arg-hist-mode
+  "Minor mode to enable argument history, like bash/zsh with M-."
+  :lighter "$."
+  :keymap (let ((map (make-sparse-keymap)))
+            (define-key map (kbd "M-.") #'eshell-insert-prev-arg)
+            map)
+  (if eshell-arg-hist-mode
+      (add-hook 'eshell-post-command-hook #'eshell-record-args nil t)
+    (remove-hook 'eshell-post-command-hook #'eshell-record-args t)))
+
+(provide 'acdw-eshell)
+;;; acdw-eshell.el ends here