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1 ;;; ob-lob.el --- functions supporting the Library of Babel
2
3 ;; Copyright (C) 2009-2011 Free Software Foundation, Inc.
4
5 ;; Author: Eric Schulte
6 ;; Dan Davison
7 ;; Keywords: literate programming, reproducible research
8 ;; Homepage: http://orgmode.org
9 ;; Version: 7.7
10
11 ;; This file is part of GNU Emacs.
12
13 ;; GNU Emacs is free software: you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation, either version 3 of the License, or
16 ;; (at your option) any later version.
17
18 ;; GNU Emacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
22
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
25
26 ;;; Code:
27 (eval-when-compile
28 (require 'cl))
29 (require 'ob)
30 (require 'ob-table)
31
32 (defvar org-babel-library-of-babel nil
33 "Library of source-code blocks.
34 This is an association list. Populate the library by adding
35 files to `org-babel-lob-files'.")
36
37 (defcustom org-babel-lob-files '()
38 "Files used to populate the `org-babel-library-of-babel'.
39 To add files to this list use the `org-babel-lob-ingest' command."
40 :group 'org-babel
41 :type 'list)
42
43 (defvar org-babel-default-lob-header-args '((:exports . "results"))
44 "Default header arguments to use when exporting #+lob/call lines.")
45
46 ;;;###autoload
47 (defun org-babel-lob-ingest (&optional file)
48 "Add all named source-blocks defined in FILE to
49 `org-babel-library-of-babel'."
50 (interactive "fFile: ")
51 (let ((lob-ingest-count 0))
52 (org-babel-map-src-blocks file
53 (let* ((info (org-babel-get-src-block-info 'light))
54 (source-name (nth 4 info)))
55 (when source-name
56 (setq source-name (intern source-name)
57 org-babel-library-of-babel
58 (cons (cons source-name info)
59 (assq-delete-all source-name org-babel-library-of-babel))
60 lob-ingest-count (1+ lob-ingest-count)))))
61 (message "%d src block%s added to Library of Babel"
62 lob-ingest-count (if (> lob-ingest-count 1) "s" ""))
63 lob-ingest-count))
64
65 (defconst org-babel-lob-call-aliases '("lob" "call")
66 "Aliases to call a source block function.
67 If you change the value of this variable then your files may
68 become unusable by other org-babel users, and vice versa.")
69
70 (defconst org-babel-block-lob-one-liner-regexp
71 (concat
72 "^\\([ \t]*\\)#\\+\\(?:"
73 (mapconcat #'regexp-quote org-babel-lob-call-aliases "\\|")
74 "\\):[ \t]+\\([^\(\)\n]+?\\)\\(\\[\\(.*\\)\\]\\|\\(\\)\\)"
75 "\(\\([^\n]*\\)\)\\(\\[.+\\]\\|\\)[ \t]*\\(\\([^\n]*\\)\\)?")
76 "Regexp to match non-inline calls to predefined source block functions.")
77
78 (defconst org-babel-inline-lob-one-liner-regexp
79 (concat
80 "\\([^\n]*\\)\\(?:"
81 (mapconcat #'regexp-quote org-babel-lob-call-aliases "\\|")
82 "\\)_\\([^\(\)\n]+?\\)\\(\\[\\(.*\\)\\]\\|\\(\\)\\)"
83 "\(\\([^\n]*\\)\)\\(\\[\\(.*?\\)\\]\\)?")
84 "Regexp to match inline calls to predefined source block functions.")
85
86 (defconst org-babel-lob-one-liner-regexp
87 (concat "\\(" org-babel-block-lob-one-liner-regexp
88 "\\|" org-babel-inline-lob-one-liner-regexp "\\)")
89 "Regexp to match calls to predefined source block functions.")
90
91 ;; functions for executing lob one-liners
92 ;;;###autoload
93 (defun org-babel-lob-execute-maybe ()
94 "Execute a Library of Babel source block, if appropriate.
95 Detect if this is context for a Library Of Babel source block and
96 if so then run the appropriate source block from the Library."
97 (interactive)
98 (let ((info (org-babel-lob-get-info)))
99 (if (nth 0 info) (progn (org-babel-lob-execute info) t) nil)))
100
101 ;;;###autoload
102 (defun org-babel-lob-get-info ()
103 "Return a Library of Babel function call as a string."
104 (flet ((nonempty (a b)
105 (let ((it (match-string a)))
106 (if (= (length it) 0) (match-string b) it))))
107 (let ((case-fold-search t))
108 (save-excursion
109 (beginning-of-line 1)
110 (when (looking-at org-babel-lob-one-liner-regexp)
111 (append
112 (mapcar #'org-babel-clean-text-properties
113 (list
114 (format "%s%s(%s)%s"
115 (nonempty 3 12)
116 (if (not (= 0 (length (nonempty 5 13))))
117 (concat "[" (nonempty 5 13) "]") "")
118 (or (nonempty 7 16) "")
119 (or (nonempty 8 19) ""))
120 (nonempty 9 18)))
121 (list (length (if (= (length (match-string 12)) 0)
122 (match-string 2) (match-string 11))))))))))
123
124 (defun org-babel-lob-execute (info)
125 "Execute the lob call specified by INFO."
126 (let ((params (org-babel-process-params
127 (org-babel-merge-params
128 org-babel-default-header-args
129 (org-babel-params-from-buffer)
130 (org-babel-params-from-properties)
131 (org-babel-parse-header-arguments
132 (org-babel-clean-text-properties
133 (concat ":var results="
134 (mapconcat #'identity (butlast info) " "))))))))
135 (org-babel-execute-src-block
136 nil (list "emacs-lisp" "results" params nil nil (nth 2 info)))))
137
138 (provide 'ob-lob)
139
140
141
142 ;;; ob-lob.el ends here