From eb689aa4385a8a98336b9a8259a55ca4e294d68e Mon Sep 17 00:00:00 2001
From: Amin Bandali <amin@gnu.org>
Date: Thu, 30 Aug 2018 01:17:06 -0400
Subject: [PATCH] [emacs] automatically tangle init.org on save

---
 init.org | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/init.org b/init.org
index bc73a1d..81c652e 100644
--- a/init.org
+++ b/init.org
@@ -665,6 +665,48 @@ In short, my favourite way of life.
   :after (:any org notmuch))
 #+end_src
 
+**** asynchronous tangle
+
+=amin/async-babel-tangle= is a function closely inspired by [[https://github.com/dieggsy/dotfiles/tree/cc10edf7701958eff1cd94d4081da544d882a28c/emacs.d#dotfiles][dieggsy's
+d/async-babel-tangle]] which uses [[https://github.com/jwiegley/emacs-async][async]] to asynchronously tangle an org
+file.
+
+#+begin_src emacs-lisp
+(after! org
+  (defvar amin-show-async-tangle-results nil
+    "Keep *emacs* async buffers around for later inspection.")
+
+  (defvar amin-show-async-tangle-time nil
+    "Show the time spent tangling the file.")
+
+  (defun amin/async-babel-tangle ()
+    "Tangle org file asynchronously."
+    (interactive)
+    (let* ((file-tangle-start-time (current-time))
+           (file (buffer-file-name))
+           (file-nodir (file-name-nondirectory file))
+           (async-quiet-switch "-q"))
+      (async-start
+       `(lambda ()
+          (require 'org)
+          (org-babel-tangle-file ,file))
+       (unless amin-show-async-tangle-results
+         `(lambda (result)
+            (if result
+                (message "Tangled %s%s"
+                         ,file-nodir
+                         (if amin-show-async-tangle-time
+                             (format " (%.3fs)"
+                                     (float-time (time-subtract (current-time)
+                                                                ',file-tangle-start-time)))
+                           ""))
+              (message "Tangling %s failed" ,file-nodir))))))))
+
+(add-to-list
+ 'safe-local-variable-values
+ '(eval add-hook 'after-save-hook #'amin/async-babel-tangle 'append 'local))
+#+end_src
+
 *** [[https://magit.vc/][Magit]]
 
 #+begin_quote
@@ -1477,3 +1519,8 @@ Display how long it took to load the init file.
 #+begin_src emacs-lisp :comments none
 ;;; init.el ends here
 #+end_src
+
+* COMMENT Local Variables                                           :ARCHIVE:
+# Local Variables:
+# eval: (add-hook 'after-save-hook #'amin/async-babel-tangle 'append 'local)
+# End:
-- 
2.20.1