Add var config max entries

Use `max_entries` as YAML key.

Co-authored-by: Dom Rodriguez <shymega@shymega.org.uk>

README.md

@@ -35,6 +35,7 @@ title: My RSS Feed
 description: My customised RSS feed with technology news
 url: https://www.example.com
 output: rss.xml
+max_entries: 5 # Delete this line to get all
 feeds:
   - https://programadorwebvalencia.com/feed/
   - https://republicaweb.es/feed/
@@ -49,7 +50,7 @@ curl -o config.yml https://raw.githubusercontent.com/tanrax/RSSingle/master/conf
 4. Run the binary.
 
 ``` shell
-./rssingle 
+./rssingle
 ```
 
 A file called `rss.xml` will be created.

config.yml

@@ -2,6 +2,7 @@ title: My RSS Feed
 description: My customised RSS feed with technology news
 url: https://www.example.com
 output: rss.xml
+max_entries: 2 # Delete this line to get all
 feeds:
   - https://programadorwebvalencia.com/feed/
-  - https://republicaweb.es/feed/
+  - https://republicaweb.es/feed/

rssingle.py

@@ -97,7 +97,7 @@ def main():
         rss = parse_rss_feed(feed)
         entries = rss.get("entries")
         log.debug("Iterating over [input] feed entries..")
-        for entry in entries:
+        for entry in entries[:CONFIG["max_entries"]] if "max_entries" in CONFIG else entries:
             log.debug("New feed entry created.")
 
             fe = fg.add_entry()