+(use-package org
+ :config
+ (setq org-src-tab-acts-natively t
+ org-src-preserve-indentation nil
+ org-edit-src-content-indentation 0)
+ :hook (org-mode . org-indent-mode))
+
+(use-package org-notmuch
+ :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.")
+
+ (defvar amin-async-tangle-post-compile "make ti"
+ "If non-nil, pass to `compile' after successful tangle.")
+
+ (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
+ (progn
+ (message "Tangled %s%s"
+ ,file-nodir
+ (if amin-show-async-tangle-time
+ (format " (%.3fs)"
+ (float-time (time-subtract (current-time)
+ ',file-tangle-start-time)))
+ ""))
+ (when amin-async-tangle-post-compile
+ (compile amin-async-tangle-post-compile)))
+ (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))
+
+(setq compilation-exit-message-function
+ (lambda (status code msg)
+ "Close the compilation window if successful."
+ ;; if M-x compile exits with 0
+ (when (and (eq status 'exit) (zerop code))
+ (bury-buffer)
+ (delete-window (get-buffer-window (get-buffer "*compilation*"))))
+ ;; return the result of compilation-exit-message-function
+ (cons msg code)))