Improve handling of descriptions

I created a separate variable for automatically generated descriptions,
since I would like to add meta tags for the manual ones in the future.

scripts/template.py

@@ -1,9 +1,13 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
+import re
 import markdown
 from datetime import datetime
 from email import utils
 
+def remove_tags(text):
+    return re.sub(re.compile('<.*?>'), "", text)
+
 def get_path(path, ext_in, ext_out):
 	path = path[len("pages"):]
 	if path[-len("index"+ext_in):] == "index"+ext_in:
@@ -85,6 +89,8 @@ def template(content, path, ext, meta):
 		meta["pub_date"] = utils.format_datetime(datetime.fromtimestamp(int(meta["timestamp"])))
 	meta["head"] += "\n<link rel=\"canonical\" href=\""+meta["base"]+meta["full_path"]+"\"/>"	
 	meta["content"] = content.format_map(meta)
-	if "description" not in meta and ext == ".html":
-		meta["description"] = meta["content"].split("</p>")[0]+"</p>" # Disgusting!
+	if "description" not in meta and meta["ext"] == ".html":
+		meta["auto_description"] = remove_tags(meta["content"].split("</p>")[0]) # Disgusting!
+	if "description" in meta:
+		meta["auto_description"] = meta["description"]
 	return t_content.format_map(meta)

templates/post_preview.html

@@ -1,5 +1,5 @@
 <div class="block">
 	<a href="{full_path}"><h3>{title}</h3></a>
-	<p>{description}</p>
+	<p>{auto_description}</p>
 	<a href="{full_path}">Read more</a>
 </div>

templates/post_preview.xml

@@ -3,7 +3,7 @@
 	<link>{{base}}{{full_dir}}{full_path}</link>
 	<guid isPermaLink="true">{{base}}{{full_dir}}{full_path}</guid>
 	<pubDate>{pub_date}</pubDate>
-	<description>{description}</description>
+	<description><![CDATA[{auto_description}]]></description>
 	<content:encoded><![CDATA[{content}]]></content:encoded>
 	<author>{author}</author>
 </item>