[PATCH] Add about-formatting filter for org-mode.

[r at rkm.id.au (Ruben Maher)]

The second patch adds a regex to the filter replacing links to binary
blobs in org files.  I've included it as a separate patch because I'm
not sure if it is considered desirable here.

You can see it in action here[0] and here[1], for each repo the .org
file is in the repository along with the screenshot.

Sometimes repositories on Github have a screenshot checked in and linked
to from the about page.  If there is such a link found in the org file,
replace it with the path to the resource being hosted by cgit.

Org image links look like this: [[./something.png]]

This regex will find matches and replace the "./" with a URL constructed
from $HTTPS, $HTTP_HOST and $CGIT_REPO_URL.

Thanks for your work on cgit.

Kind regards,

Ruben

[0] https://code.rkm.id.au/websockets-fighter/about/
[1] https://code.rkm.id.au/circe-notifications/about/

---
 filters/html-converters/resources/org2html.el | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/filters/html-converters/resources/org2html.el b/filters/html-converters/resources/org2html.el
index 8cac096..5fcd6bf 100755
--- a/filters/html-converters/resources/org2html.el
+++ b/filters/html-converters/resources/org2html.el
@@ -40,4 +40,10 @@
 
 (when (get-buffer "*org2html*")
   (set-buffer "*org2html*")
+  (goto-char (point-min))
+  (replace-regexp
+   "\\[\\[\\.\\/\\([^.]+\\)\\.\\(\\w+\\)\\]\\]"
+   (concat "[[" (if (string-equal "on" (getenv "HTTPS")) "https://" "http://")
+           (getenv "HTTP_HOST") "/" (getenv "CGIT_REPO_URL")
+           "/plain/\\1.\\2]]"))
   (princ (org-export-as 'html nil t t)))
-- 
2.4.5