pyrsync2

This is a fork of the pyrsync package with some changes such as:

- The functions `blockchecksums` and `rsyncdelta` are now generators
  which make it easier to send through the network
- Some unittests are added
- Implementation changes (uses bytearray instead of a deque, faster hash lookup etc.)
- The block size is no longer in the delta itself, it needs to be passed
  to the patchstream function
- Does not use try/except for programming logic

It's a Python 3 only package!

pyrsync2 is a Python module which implements the rsync algorithm, written in pure Python. It is not a wrapper for rsync, but a set of functions which apply full rsync functionality through Python.

The majority of the code for this module is taken from Eric Pruitt's post at ActiveState. It was orginally licensed under an MIT license, and this license has been kept wthout modifications.

Installation

You need to have PIP:

$ sudo pip install pyrsync2

Use

An example use case for this module:

# On the system containing the file that needs to be patched
>>> import pyrsync2
>>> unpatched = open("unpatched.file", "rb")
>>> hashes = pyrsync2.blockchecksums(unpatched)

# On the remote system after having received hashes
>>> import pyrsync2
>>> patchedfile = open("patched.file", "rb")
>>> delta = pyrsync2.rsyncdelta(patchedfile, hashes)

# System with the unpatched file after receiving delta
>>> unpatched.seek(0)
>>> save_to = open("locally-patched.file", "wb")
>>> pyrsync2.patchstream(unpatched, save_to, delta)