zstd-patch

Example on how to use libzstd as a patching engine.

The aim of this project is to recreate the behavior of --patch-from and --patch-apply features of a zstd CLI app.

Build instructions

Requirements

Tools used for development:

• Fedora Linux 42
• Zstandard 1.5.7
• CMake 3.31.6
• Ninja 1.12.1

Commands

mkdir build && cd build
cmake -G "Ninja" ..
cmake --build . -- -j $(nproc)

Usage

Apply patch mode

To apply patch use:

./zstd-patch apply <PATH TO OLD VERSION> <PATH TO PATCH> <PATH TO NEW VERSION>

This should behave like:

zstd -d --patch-from <PATH TO OLD VERSION> <PATH TO PATCH> -o <PATH TO NEW VERSION>

Create patch mode

To create patch use:

./zstd-patch create <PATH TO OLD VERSION> <PATH TO PATCH> <PATH TO NEW VERSION>

This should behave like:

zstd --patch-from <PATH TO OLD VERSION> <PATH TO NEW VERSION> -o <PATH TO PATCH>

Example

./zstd-patch create old-file out.zst new-file
./zstd-patch apply old-file out.zst patched-file