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Description:

pythonrsync 0.1.2

✨ pyrsync ✨
The python binding for librsync

Install
pip install python-rsync

Usage
from io import BytesIO
from pyrsync import delta, get_signature_args, signature, patch

s = b"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" * 50
d = b"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" * 50 + b"2"
src = BytesIO(s)
dst = BytesIO(d)
magic, block_len, strong_len = get_signature_args(len(s))
sig = BytesIO()
signature(dst, sig, strong_len, magic, block_len) # sig由dst产生
dst.seek(0, 0)
sig.seek(0, 0)
_delta = BytesIO()
delta(src, sig, _delta) # src和sig对比产生delta
src.seek(0, 0)
_delta.seek(0, 0)
out = BytesIO()
patch(dst, _delta, out)
assert out.getvalue() == src.getvalue()

Public functions
from typing import IO

class LibrsyncError(Exception):
code: Any
def __init__(self, result) -> None: ...

RS_JOB_BLOCKSIZE: int
RS_DELTA_MAGIC: int
RS_MD4_SIG_MAGIC: int
RS_BLAKE2_SIG_MAGIC: int
RS_RK_MD4_SIG_MAGIC: int
RS_RK_BLAKE2_SIG_MAGIC: int

def get_signature_args(old_fsize: int, magic: int = 0, block_len: int = 0, strong_len: int = 0) -> tuple: ...
def signature(input:IO, output:IO, strong_len: int, sig_magic: int, block_size: int = ...) -> None: ...
def delta(input:IO, sigfile:IO, output) -> None: ...
def patch(input:IO, delta:IO, output) -> None: ...

Compile
python -m pip install setuptools wheel cython cffi
git clone https://github.com/synodriver/pyrsync
cd pyrsync
git submodule update --init --recursive
python setup.py bdist_wheel --use-cython --use-cffi

Backend Choose
Use RSYNC_USE_CFFI env var to use cffi backend, otherwise it's depend on your python implementation.