(require 'cl-lib) (require 'org) (require 'org-element) (require 'org-persist)
(setq org-element-use-cache t org-element-cache-persistent t)
(when (getenv "SV") (setq org-element--cache-self-verify t org-element--cache-self-verify-frequency 1.0))
(defun nilbuf (buf) (with-current-buffer buf
  (let ((k 0)) (avl-tree-mapc (lambda (el) (unless (org-element-property :buffer el) (cl-incf k))) org-element--cache) k)))
(let* ((file (make-temp-file "np-" nil ".org")))
  (copy-file (expand-file-name "todo.org" default-directory) file t)
  (let ((real (find-file-noselect file)))
    (with-current-buffer real (org-element-cache-map (lambda (_) nil) :granularity 'element))
    (message ">> before: nil-buffer=%d" (nilbuf real))
    (message ">> MODE=%s" (getenv "MODE"))
    (pcase (getenv "MODE")
      ("writeall" (org-persist-write-all))
      ("writebuf" (with-current-buffer real (org-persist-write-all-buffer)))
      (_ nil))
    (message ">> after trigger: nil-buffer=%d" (nilbuf real))
    (with-current-buffer real
      (goto-char (point-max))
      (condition-case err (let ((inhibit-read-only t)) (insert "\n* Edit\n"))
        (error (message ">> RESULT: insert SIGNALLED %S" err)))
      (message ">> insert survived (nil-buffer=%d)" (nilbuf real))
      (set-buffer-modified-p nil)))
  (delete-file file))