From 24c11301b8e06a696ca371eff4087d5e539504f5 Mon Sep 17 00:00:00 2001
From: JSDurand <mmemmew@gmail.com>
Date: Mon, 19 Jul 2021 12:19:37 +0800
Subject: new: track time in eshell

Now eshell will display the elapsed time of the last command at the
beginning of the prompt.

* eshell-conf.el
(eshell-current-command-start-time): the variable to track the start
time of the commands.

(eshell-prompt-time-string): this will be displayed at the prompt, if
non-nil.

(eshell-current-command-start): set an appropriate variable as the
start time of the command.

(eshell-current-command-stop): calculat the elapsed time since the
last command started and convert that into a pretty string to
display.

(eshell-current-command-time-track): add hooks.

(eshell-start-track-command-time):
(eshell-stop-track-command-time): switches of the time-tracking
mechanism.

(#'eshell-emit-prompt):
(durand-eshell-emit-prompt): advice the original function to take into
account the time information.

refactor:
(eshell/marks): add some colors
---
 eshell-conf.el | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 87 insertions(+), 1 deletion(-)

(limited to 'eshell-conf.el')

diff --git a/eshell-conf.el b/eshell-conf.el
index d0fc491..425d5cc 100644
--- a/eshell-conf.el
+++ b/eshell-conf.el
@@ -32,6 +32,92 @@
 (require 'esh-util)
 (require 'ring)
 
+;; Measure time of commands and display automatically.
+
+;;;###autoload
+(defvar-local eshell-current-command-start-time nil
+  "The time of the start of the current command.")
+
+;;;###autoload
+(defvar-local eshell-prompt-time-string ""
+  "The string displaying the time of the last command, if any.")
+
+;;;###autoload
+(defun eshell-current-command-start ()
+  (setq-local eshell-current-command-start-time (current-time)))
+
+;;;###autoload
+(defun eshell-current-command-stop ()
+  (cond
+   ((timep eshell-current-command-start-time)
+    (let* ((elapsed-time (time-since eshell-current-command-start-time))
+           (elapsed-time-list (time-convert elapsed-time 'list))
+           (elapsed-time-int (time-convert elapsed-time 'integer))
+           (format-seconds-string
+            (format-seconds "%yy %dd %hh %mm %ss%z" elapsed-time-int))
+           (microseconds (caddr elapsed-time-list))
+           (micro-str
+            (cond ((> microseconds 10000)
+                   (format "%dμs" microseconds)))))
+      (setq eshell-prompt-time-string
+            (mapconcat #'identity
+                       (delq nil (list format-seconds-string
+                                       micro-str))
+                       " "))
+      (message eshell-prompt-time-string))
+    (setq eshell-current-command-start-time nil))))
+
+;;;###autoload
+(defun eshell-current-command-time-track ()
+  (add-hook 'eshell-pre-command-hook #'eshell-current-command-start nil t)
+  (add-hook 'eshell-post-command-hook #'eshell-current-command-stop nil t))
+
+;;;###autoload
+(defun eshell-start-track-command-time ()
+  "Start tracking the time of commands."
+  (cond
+   ((derived-mode-p 'eshell-mode)
+    (eshell-current-command-time-track)))
+  (add-hook 'eshell-mode-hook #'eshell-current-command-time-track))
+
+;;;###autoload
+(defun eshell-stop-track-command-time ()
+  (remove-hook 'eshell-pre-command-hook #'eshell-current-command-start t)
+  (remove-hook 'eshell-post-command-hook #'eshell-current-command-stop t)
+  (remove-hook 'eshell-mode-hook #'eshell-current-command-time-track))
+
+;;;###autoload
+(defun durand-eshell-emit-prompt ()
+  "Emit a prompt if eshell is being used interactively.
+Add a time information at the beginning. -- Modified by Durand."
+  (when (boundp 'ansi-color-context-region)
+    (setq ansi-color-context-region nil))
+  (run-hooks 'eshell-before-prompt-hook)
+  (if (not eshell-prompt-function)
+      (set-marker eshell-last-output-end (point))
+    (let ((prompt (funcall eshell-prompt-function)))
+      (and eshell-highlight-prompt
+	   (add-text-properties 0 (length prompt)
+				'(read-only t
+				  font-lock-face eshell-prompt
+				  front-sticky (font-lock-face read-only)
+				  rear-nonsticky (font-lock-face read-only))
+				prompt))
+      (eshell-interactive-print
+       (mapconcat #'identity
+                  (delq
+                   nil
+                   (list
+                    (cond ((> (length eshell-prompt-time-string) 0)
+                           (propertize eshell-prompt-time-string
+                                       'font-lock-face 'modus-themes-heading-1)) )
+                    prompt))
+                  " "))
+      (setq eshell-prompt-time-string "")))
+  (run-hooks 'eshell-after-prompt-hook))
+
+(advice-add #'eshell-emit-prompt :override #'durand-eshell-emit-prompt)
+
 ;; Eshell sets the keymap in the major mode function...
 
 ;;;###autoload
@@ -90,7 +176,7 @@ Just for the completeness."
   (mapconcat
    (function
     (lambda (mark)
-      (concat mark
+      (concat (propertize mark 'font-lock-face 'modus-themes-mark-symbol)
               (make-string (- max-length (length mark)) #x20)
               " -> "
               (file-truename (expand-file-name mark eshell-mark-directory)))))
-- 
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