rendercomment: use python-markdown's new registration API

First, this gets rid of the deprecation warnings Python displayed.

Second, this fixes the case where a link contained a pair of
underscores, which used to be interpreted as an emphasis because the
linkify processor ran after the emphasis processor.
Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>

aurweb/scripts/rendercomment.py

@@ -26,7 +26,8 @@ class LinkifyExtension(markdown.extensions.Extension):
 
     def extendMarkdown(self, md, md_globals):
         processor = markdown.inlinepatterns.AutolinkInlineProcessor(self._urlre, md)
-        md.inlinePatterns.add('linkify', processor, '_end')
+        # Register it right after the default <>-link processor (priority 120).
+        md.inlinePatterns.register(processor, 'linkify', 119)
 
 
 class FlysprayLinksInlineProcessor(markdown.inlinepatterns.InlineProcessor):
@@ -47,7 +48,7 @@ class FlysprayLinksInlineProcessor(markdown.inlinepatterns.InlineProcessor):
 class FlysprayLinksExtension(markdown.extensions.Extension):
     def extendMarkdown(self, md, md_globals):
         processor = FlysprayLinksInlineProcessor(r'\bFS#(\d+)\b',md)
-        md.inlinePatterns.add('flyspray-links', processor, '_end')
+        md.inlinePatterns.register(processor, 'flyspray-links', 118)
 
 
 class GitCommitsInlineProcessor(markdown.inlinepatterns.InlineProcessor):
@@ -92,7 +93,7 @@ class GitCommitsExtension(markdown.extensions.Extension):
 
     def extendMarkdown(self, md, md_globals):
         processor = GitCommitsInlineProcessor(md, self._head)
-        md.inlinePatterns.add('git-commits', processor, '_end')
+        md.inlinePatterns.register(processor, 'git-commits', 117)
 
 
 class HeadingTreeprocessor(markdown.treeprocessors.Treeprocessor):
@@ -106,7 +107,8 @@ class HeadingTreeprocessor(markdown.treeprocessors.Treeprocessor):
 
 class HeadingExtension(markdown.extensions.Extension):
     def extendMarkdown(self, md, md_globals):
-        md.treeprocessors.add('heading', HeadingTreeprocessor(md), '_end')
+        # Priority doesn't matter since we don't conflict with other processors.
+        md.treeprocessors.register(HeadingTreeprocessor(md), 'heading', 30)
 
 
 def get_comment(conn, commentid):

test/t2600-rendercomment.sh

@@ -52,7 +52,8 @@ test_expect_success 'Test HTML sanitizing.' '
 test_expect_success 'Test link conversion.' '
 	cat <<-EOD | sqlite3 aur.db &&
 	INSERT INTO PackageComments (ID, PackageBaseID, Comments, RenderedComment) VALUES (4, 1, "
-		Visit https://www.archlinux.org/.
+		Visit https://www.archlinux.org/#_test_.
+		Visit *https://www.archlinux.org/*.
 		Visit <https://www.archlinux.org/>.
 		Visit \`https://www.archlinux.org/\`.
 		Visit [Arch Linux](https://www.archlinux.org/).
@@ -62,7 +63,8 @@ test_expect_success 'Test link conversion.' '
 	EOD
 	"$RENDERCOMMENT" 4 &&
 	cat <<-EOD >expected &&
-		<p>Visit <a href="https://www.archlinux.org/">https://www.archlinux.org/</a>.
+		<p>Visit <a href="https://www.archlinux.org/#_test_">https://www.archlinux.org/#_test_</a>.
+		Visit <em><a href="https://www.archlinux.org/">https://www.archlinux.org/</a></em>.
 		Visit <a href="https://www.archlinux.org/">https://www.archlinux.org/</a>.
 		Visit <code>https://www.archlinux.org/</code>.
 		Visit <a href="https://www.archlinux.org/">Arch Linux</a>.