Tips for Improving Download Size & Performance Sparkle verifies a checksum to ensure the resulting application has been patched successfully. In any case where a binary delta update fails to install, Sparkle falls back to downloading and installing the regular full update. Always use the latest tools when creating delta patches because they may contain minor bug fixes that don’t require a major format change. Please do not create new patches using an older version than necessary. Older delta format versions will eventually be phased out. If you are using BinaryDelta create though, you will need to pass the appropriate delta version via the -version argument. Note if you are using generate_appcast, picking the delta version to use is automatically handled. Tracking of insertions, deletions, and binary file diffs using bsdiff. Improved and changed hash function for reducing collisions.Īdded initial binary delta format using libxar and bzip2 compression. More efficient custom delta container format, lzma compression + other compression options, file rename heuristic tracking. Below is a table describing the requirements for each binary delta version. When you create a delta update between two versions of your application, you must ensure you are using a delta format version that your older application knows how to patch. In these cases, Sparkle can skip attempting to download and apply a delta update. These attributes help Sparkle detect cases where a user strips your application’s localizations or architecture slices. lproj locale directory names (minus the path extension) in amework/Versions/B/Resources/ from the old application. The deltaFromSparkleLocales refers to a comma-delimited partial list of. The sparkle:deltaFromSparkleExecutableSize attribute refers to the file size in bytes of amework/Versions/B/Sparkle from the older application. These are the sparkle:deltaFromSparkleExecutableSize and sparkle:deltaFromSparkleLocales attributes. Sparkle 2.3 introduces two optional attributes for testing if a delta update can be applied before downloading a delta update.
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