Incremental Backup provides a modular engine which can be used to store specialized incremental backups of files. A very naive binary handler is included, as is a specialized minecraft .MCA file handler. In my usage the incremental backup never used more than 2x the storage space than the original world file.
The SwitchingIncrementalBackup class is the heart of the engine. An instance of the class represents an ongoing backup from a directory to a backup directory. FileHandlers must be registered using the register method. This connects an instance of ITypeHandler to a given file extension (the . should not be included in the call). A set of ignored paths can also be provided in the constructor. If a filetype is not registered, the class will default to the naive binary chunk comparison.
The performIncrementalBackup is the method that should be used most of the time. performFullBackup will create a new directory and loses all previous differences. This will improve performance, but obviously requires much more space to be used.
This interface defines how to combine and compare files, and also includes a few helper methods such as bufferToTrimmedArray. Make sure any implementations follow the guidelines set in the docstrings for combine and getDifference
This class allows different compression methods to be used for storing the differences, without needing the comparison interface to implement it.