Add +eshell-here

init.el

@@ -342,6 +342,8 @@
            eshell-prompt-regexp (rx bol (* (not (any ?# ?$ ?\n)))
                                     " " (any ?# ?$)
                                     (* " ")))
+  (:+leader "s" #'+eshell-here
+            "C-s" #'+eshell-here)
   (with-eval-after-load 'mwim
     (setf (alist-get 'eshell-mode mwim-beginning-of-line-function)
           #'eshell-bol))

lisp/+eshell.el

@@ -25,6 +25,22 @@ any directory proferred by `consult-dir'."
 
 ;;; Start and quit
 
+;; from https://old.reddit.com/r/emacs/comments/1zkj2d/advanced_usage_of_eshell/
+(defun +eshell-here ()
+  "Go to eshell and set current directory to current buffer's."
+  ;; consider: make a new eshell buffer when given a prefix argument.
+  (interactive)
+  (let ((dir (file-name-directory (or (buffer-file-name)
+                                      default-directory))))
+    (eshell)
+    (eshell/pushd ".")
+    (cd dir)
+    (goto-char (point-max))
+    (eshell-kill-input)
+    (eshell-send-input)
+    (setq-local scroll-margin 0)
+    (recenter 0)))
+
 (defun +eshell-quit-or-delete-char (arg)
   "Delete the character to the right, or quit eshell on an empty line."
   (interactive "p")