Allow read-only files to be overwritten

Submitted by Amit Chakradeo

THANKS

@@ -14,6 +14,7 @@ Harry Fuecks    - default item date to feed date
 Antonio Cavedoni - Django templates
 Morten Frederiksen - expungeCache
 Lenny Domnitser - Coral CDN support for URLs with non-standard ports
+Amit Chakradeo  - Allow read-only files to be overwritten
 
 This codebase represents a radical refactoring of Planet 2.0, which lists
 the following contributors:

planet/splice.py

@@ -131,5 +131,6 @@ def apply(doc):
             if not os.path.exists(dest_dir): os.makedirs(dest_dir)
 
             log.info("Copying %s to %s", source, dest)
+            if os.path.exists(dest): os.chmod(dest, 0644)
             shutil.copyfile(source, dest)
             shutil.copystat(source, dest)