From f89a821a0e8154d55186cacfa5325f4342e91a12 Mon Sep 17 00:00:00 2001
From: Pierre-Yves Chibon <pingou@pingoured.fr>
Date: Mar 18 2015 14:34:56 +0000
Subject: Add a crossref filter to add cross-reference links between issues in their comment


Fixes http://209.132.184.222/progit/issue/57

---

diff --git a/progit/ui/filters.py b/progit/ui/filters.py
index e5bbd86..0f0b575 100644
--- a/progit/ui/filters.py
+++ b/progit/ui/filters.py
@@ -180,6 +180,36 @@ def shorted_commit(cid):
     return cid[:APP.config['SHORT_LENGTH']]
 
 
+@APP.template_filter('crossref')
+def crossref_filter(text):
+    """ Template filter adding a link when the provided text references
+    another issue or pull-request.
+    """
+    regex = re.compile('.*\s#(\d+)', re.I)
+    if text:
+        if regex.match(text):
+
+            url = flask.request.url
+            username = None
+            if 'fork/' in flask.request.url:
+                username, project = url.split('fork/')[1].split('/', 2)[:2]
+            else:
+                project = url.split(
+                    flask.request.url_root)[1].split('/', 1)[0]
+
+            issueid = regex.match(text).group(1)
+            text = text.replace('#%s' % issueid, '[#%s](%s)' % (
+                issueid, flask.url_for(
+                    'view_issue', username=username, repo=project,
+                    issueid=issueid)
+                )
+            )
+
+        return text
+    else:
+        return ''
+
+
 @APP.template_filter('markdown')
 def markdown_filter(text):
     """ Template filter converting a string into html content using the