Eshell: Bind RET to append-region-to-command-line

.emacs.d/lisp/init-eshell.el

@@ -304,4 +304,15 @@ See `eshell' for the numeric prefix ARG."
     (setq fish-completion-fallback-on-bash-p t)
     (global-fish-completion-mode)))
 
+;; Misc.
+(defun ambrevar/eshell-append-region-to-command-line (begin end)
+  (interactive "r")
+  (save-mark-and-excursion
+    (let ((string (buffer-substring-no-properties begin end)))
+      (setq string (string-trim string))
+      (setq string (concat string " "))
+      (goto-char (point-max))
+      (ignore-errors (cycle-spacing 0))
+      (insert string))))
+
 (provide 'init-eshell)

.emacs.d/lisp/init-evil.el

@@ -231,4 +231,8 @@
   (dolist (map (list elfeed-search-mode-map elfeed-show-mode-map))
     (evil-define-key 'normal map "m" 'ambrevar/elfeed-add-bookmark)))
 
+;; Eshell
+(with-eval-after-load 'init-eshell
+  (evil-define-key 'visual eshell-mode-map (kbd "<return>") 'ambrevar/eshell-append-region-to-command-line))
+
 (provide 'init-evil)