openSUSE/obs-service-recompress — pull request #1 by saschpe (2013-10-29 15:15:34+00:00)
Title: Don't overwrite identical files

Check if newly generated (compressed) files are the same as the target file. "Same" means if they only have different timestamps but the content matches. This has to be done by uncompressing both files and recursively diff their contents as zdiff & co fail to do that properly.