--- planet-nightly/planet/__init__.py	2006-05-23 02:01:58.000000000 +0200
+++ planet-dev/planet/__init__.py	2006-05-22 22:38:59.000000000 +0200
@@ -35,6 +35,7 @@
 import dbhash
 import re
 import xml.sax.saxutils
+import filecmp
 
 
 # Version information (for generator headers)
@@ -297,7 +298,7 @@
 
             try:
                 log.info("Writing %s", output_file)
-                output_fd = open(output_file, "w")
+                output_fd = open("%s.tmp" % output_file, "w")
                 if encoding.lower() in ("utf-8", "utf8"):
                     # UTF-8 output is the default because we use that internally
                     output_fd.write(tp.process(template))
@@ -310,6 +311,10 @@
                     output = tp.process(template).decode("utf-8")
                     output_fd.write(output.encode(encoding, "replace"))
                 output_fd.close()
+                if filecmp.cmp("%s.tmp" % output_file, output_file):
+                    os.unlink("%s.tmp" % output_file)
+                else:
+                    os.rename("%s.tmp" % output_file, output_file)
             except KeyboardInterrupt:
                 raise
             except: