1 ;;; rstdoc.el --- help generate documentation from docstrings -*- lexical-binding: t -*-
3 ;; Copyright (C) 2018 David Bremner
5 ;; Author: David Bremner <david@tethera.net>
6 ;; Created: 26 May 2018
7 ;; Keywords: emacs lisp, documentation
8 ;; Homepage: https://notmuchmail.org
10 ;; This file is not part of GNU Emacs.
12 ;; rstdoc.el is free software: you can redistribute it and/or modify it
13 ;; under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation, either version 3 of the License, or
15 ;; (at your option) any later version.
17 ;; rstdoc.el is distributed in the hope that it will be useful, but
18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 ;; General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with rstdoc.el. If not, see <https://www.gnu.org/licenses/>.
28 ;; Rstdoc provides a facility to extract all of the docstrings defined in
29 ;; an elisp source file. Usage:
31 ;; emacs -Q --batch -L . -l rstdoc -f rstdoc-batch-extract foo.el foo.rsti
35 (defun rstdoc-batch-extract ()
36 "Extract docstrings to and from the files on the command line."
37 (apply #'rstdoc-extract command-line-args-left))
39 (defun rstdoc-extract (in-file out-file)
40 "Write docstrings from IN-FILE to OUT-FILE."
42 (let* ((definitions (cdr (assoc (expand-file-name in-file) load-history)))
43 (text-quoting-style 'grave)
44 (doc-hash (make-hash-table :test 'eq)))
49 (`(defun . ,name) (cons name (documentation name)))
51 (sym (cons sym (get sym 'variable-documentation))))))
52 (when (and pair (cdr pair))
53 (puthash (car pair) (cdr pair) doc-hash))))
58 (rstdoc--insert-docstring key val))
60 (write-region (point-min) (point-max) out-file))))
62 (defun rstdoc--insert-docstring (symbol docstring)
63 (insert (format "\n.. |docstring::%s| replace::\n" symbol))
64 (insert (replace-regexp-in-string "^" " "
65 (rstdoc--rst-quote-string docstring)))
68 (defvar rst--escape-alist
69 '( ("\\\\='" . "\001")
70 ("`\\([^\n`']*\\)[`']" . "\002\\1\002") ;; good enough for now...
75 ("^[[:space:]]*$" . "|br|")
76 ("^[[:space:]]" . "|indent| "))
77 "list of (regex . replacement) pairs")
79 (defun rstdoc--rst-quote-string (str)
82 (dolist (pair rst--escape-alist)
83 (goto-char (point-min))
84 (while (re-search-forward (car pair) nil t)
85 (replace-match (cdr pair))))
86 (buffer-substring (point-min) (point-max))))
90 ;;; rstdoc.el ends here