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(defpackage :org-toc
(:use :cl :parzival))
(in-package :org-toc)
(<<def <toc-line<
(<<bind (<<counting+ (<<char #\*))
(lambda (count)
(<<map (lambda (matched)
(let ((toc-entry (concatenate 'string matched)))
(format nil "~a- [[~a][~a]]"
(make-string (* 2 count) :initial-element #\Space)
toc-entry
toc-entry)))
(<<and <whitespace+< (<<+ <item<)))))
"Accepts a valid Org Mode heading and results in an org mode
list item with a link to that heading.")
(defun print-toc-for (file &optional (output *standard-output*))
"Prints a table of contents for a given org file to the supplied stream."
(with-open-file (input file)
(loop
:for line = (read-line input nil nil)
:while line
:do (multiple-value-bind (entry success-p) (parse line <toc-line< t)
(when success-p (format output "~a~%" entry))))))
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