When an FS#123 is part of a code block, it must not be converted into a
link. FS#123 may also appear inside an URL, in which case regular
linkifaction of URLs must take precedence.
---
 aurweb/scripts/rendercomment.py | 21 ++++++++++++++-------
 test/t2600-rendercomment.sh     | 26 ++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 7 deletions(-)

diff --git a/aurweb/scripts/rendercomment.py b/aurweb/scripts/rendercomment.py
index ba28486..7cba6ef 100755
--- a/aurweb/scripts/rendercomment.py
+++ b/aurweb/scripts/rendercomment.py
@@ -29,18 +29,25 @@ class LinkifyExtension(markdown.extensions.Extension):
         md.inlinePatterns.add('linkify', processor, '_end')
 
 
-class FlysprayLinksPreprocessor(markdown.preprocessors.Preprocessor):
-    _fsre = re.compile(r'\b(FS#(\d+))\b')
-    _sub = r'[\1](https://bugs.archlinux.org/task/\2)'
+class FlysprayLinksInlineProcessor(markdown.inlinepatterns.InlineProcessor):
+    """
+    Turn Flyspray task references like FS#1234 into links to 
bugs.archlinux.org.
+
+    The pattern's capture group 0 is the text of the link and group 1 is the
+    Flyspray task ID.
+    """
 
-    def run(self, lines):
-        return [self._fsre.sub(self._sub, line) for line in lines]
+    def handleMatch(self, m, data):
+        el = markdown.util.etree.Element('a')
+        el.set('href', f'https://bugs.archlinux.org/task/{m.group(1)}')
+        el.text = markdown.util.AtomicString(m.group(0))
+        return el, m.start(0), m.end(0)
 
 
 class FlysprayLinksExtension(markdown.extensions.Extension):
     def extendMarkdown(self, md, md_globals):
-        preprocessor = FlysprayLinksPreprocessor(md)
-        md.preprocessors.add('flyspray-links', preprocessor, '_end')
+        processor = FlysprayLinksInlineProcessor(r'\bFS#(\d+)\b',md)
+        md.inlinePatterns.add('flyspray-links', processor, '_end')
 
 
 class GitCommitsInlineProcessor(markdown.inlinepatterns.InlineProcessor):
diff --git a/test/t2600-rendercomment.sh b/test/t2600-rendercomment.sh
index b0209eb..1da422d 100755
--- a/test/t2600-rendercomment.sh
+++ b/test/t2600-rendercomment.sh
@@ -103,4 +103,30 @@ test_expect_success 'Test Git commit linkification.' '
        test_cmp actual expected
 '
 
+test_expect_success 'Test Flyspray issue linkification.' '
+       sqlite3 aur.db <<-EOD &&
+       INSERT INTO PackageComments (ID, PackageBaseID, Comments, 
RenderedComment) VALUES (6, 1, "
+               FS#1234567.
+               *FS#1234*
+               FS#
+               XFS#1
+               \`FS#1234\`
+               https://archlinux.org/?test=FS#1234
+       ", "");
+       EOD
+       "$RENDERCOMMENT" 6 &&
+       cat <<-EOD >expected &&
+               <p><a 
href="https://bugs.archlinux.org/task/1234567";>FS#1234567</a>.
+               <em><a 
href="https://bugs.archlinux.org/task/1234";>FS#1234</a></em>
+               FS#
+               XFS#1
+               <code>FS#1234</code>
+               <a 
href="https://archlinux.org/?test=FS#1234";>https://archlinux.org/?test=FS#1234</a></p>
+       EOD
+       sqlite3 aur.db <<-EOD >actual &&
+       SELECT RenderedComment FROM PackageComments WHERE ID = 6;
+       EOD
+       test_cmp actual expected
+'
+
 test_done
-- 
2.25.0

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