Delete contrib/lisp/ox-gfm.el
See https://github.com/larstvei/ox-gfm/issues/14.
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;;; ox-gfm.el --- Github Flavored Markdown Back-End for Org Export Engine
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;; Copyright (C) 2014 Lars Tveito
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;; Author: Lars Tveito
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;; Keywords: org, wp, markdown, github
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;; This file is not part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This library implements a Markdown back-end (github flavor) for Org
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;; exporter, based on the `md' back-end.
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;;; Code:
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(require 'ox-md)
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;;; User-Configurable Variables
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(defgroup org-export-gfm nil
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"Options specific to Markdown export back-end."
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:tag "Org Github Flavored Markdown"
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:group 'org-export
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:version "24.4"
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:package-version '(Org . "8.0"))
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(defcustom org-gfm-lang '(("emacs-lisp" . "lisp") ("elisp" . "lisp"))
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"Alist of languages that are not recognized by Github, to
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languages that are. Emacs lisp is a good example of this, where
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we can use lisp as a nice replacement."
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:group 'org-export-gfm)
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;;; Define Back-End
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(org-export-define-derived-backend 'gfm 'md
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:filters-alist '((:filter-parse-tree . org-md-separate-elements))
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:menu-entry
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'(?g "Export to Github Flavored Markdown"
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((?G "To temporary buffer"
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(lambda (a s v b) (org-gfm-export-as-markdown a s v)))
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(?g "To file" (lambda (a s v b) (org-gfm-export-to-markdown a s v)))
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(?o "To file and open"
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(lambda (a s v b)
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(if a (org-gfm-export-to-markdown t s v)
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(org-open-file (org-gfm-export-to-markdown nil s v)))))))
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:translate-alist '((inner-template . org-gfm-inner-template)
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(strike-through . org-gfm-strike-through)
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(src-block . org-gfm-src-block)))
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;;; Transcode Functions
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;;;; Src Block
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(defun org-gfm-src-block (src-block contents info)
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"Transcode SRC-BLOCK element into Github Flavored Markdown
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format. CONTENTS is nil. INFO is a plist used as a communication
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channel."
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(let* ((lang (org-element-property :language src-block))
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(lang (or (assoc-default lang org-gfm-lang) lang))
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(code (org-export-format-code-default src-block info))
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(prefix (concat "```" lang "\n"))
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(suffix "```"))
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(concat prefix code suffix)))
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;;;; Strike-Through
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(defun org-html-strike-through (strike-through contents info)
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"Transcode STRIKE-THROUGH from Org to Markdown (GFM).
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CONTENTS is the text with strike-through markup. INFO is a plist
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holding contextual information."
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(format "~~%s~~" contents))
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;;;; Table of contents
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(defun org-gfm-format-toc (headline)
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"Return an appropriate table of contents entry for HEADLINE. INFO is a
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plist used as a communication channel."
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(let* ((title (org-export-data
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(org-export-get-alt-title headline info) info))
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(level (1- (org-element-property :level headline)))
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(indent (concat (make-string (* level 2) ? )))
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(ref-str (replace-regexp-in-string " " "-" (downcase title))))
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(concat indent "- [" title "]" "(#" ref-str ")")))
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;;;; Template
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(defun org-gfm-inner-template (contents info)
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"Return body of document after converting it to Markdown syntax.
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CONTENTS is the transcoded contents string. INFO is a plist
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holding export options."
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(let* ((depth (plist-get info :with-toc))
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(headlines (and depth (org-export-collect-headlines info depth)))
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(toc-string (or (mapconcat 'org-gfm-format-toc headlines "\n") ""))
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(toc-tail (if headlines "\n\n" "")))
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(concat toc-string toc-tail contents)))
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;;; Interactive function
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;;;###autoload
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(defun org-gfm-export-as-markdown (&optional async subtreep visible-only)
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"Export current buffer to a Github Flavored Markdown buffer.
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If narrowing is active in the current buffer, only export its
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narrowed part.
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If a region is active, export that region.
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A non-nil optional argument ASYNC means the process should happen
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asynchronously. The resulting buffer should be accessible
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through the `org-export-stack' interface.
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When optional argument SUBTREEP is non-nil, export the sub-tree
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at point, extracting information from the headline properties
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first.
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When optional argument VISIBLE-ONLY is non-nil, don't export
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contents of hidden elements.
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Export is done in a buffer named \"*Org GFM Export*\", which will
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be displayed when `org-export-show-temporary-export-buffer' is
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non-nil."
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(interactive)
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(org-export-to-buffer 'gfm "*Org GFM Export*"
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async subtreep visible-only nil nil (lambda () (text-mode))))
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;;;###autoload
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(defun org-gfm-convert-region-to-md ()
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"Assume the current region has org-mode syntax, and convert it
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to Github Flavored Markdown. This can be used in any buffer.
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For example, you can write an itemized list in org-mode syntax in
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a Markdown buffer and use this command to convert it."
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(interactive)
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(org-export-replace-region-by 'gfm))
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;;;###autoload
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(defun org-gfm-export-to-markdown (&optional async subtreep visible-only)
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"Export current buffer to a Github Flavored Markdown file.
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If narrowing is active in the current buffer, only export its
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narrowed part.
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If a region is active, export that region.
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A non-nil optional argument ASYNC means the process should happen
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asynchronously. The resulting file should be accessible through
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the `org-export-stack' interface.
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When optional argument SUBTREEP is non-nil, export the sub-tree
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at point, extracting information from the headline properties
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first.
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When optional argument VISIBLE-ONLY is non-nil, don't export
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contents of hidden elements.
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Return output file's name."
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(interactive)
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(let ((outfile (org-export-output-file-name ".md" subtreep)))
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(org-export-to-file 'gfm outfile async subtreep visible-only)))
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(provide 'ox-gfm)
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;; Local variables:
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;; generated-autoload-file: "org-loaddefs.el"
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;; End:
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;;; ox-gfm.el ends here
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