Generate update files from umu compatibility tools.
This program is a simple patch generator, and the patch files generated are intended to be consumed by umu-launcher with umu-supported compatibility tools as inputs. The generated patch file is bit inspired from Mozilla's MAR format. However, different decisions are made for the file's serialization format, cryptographic primitives, and patch engine to create the binary diffs.
At a high level, umu-mkpatch compares two directories, where 'a' and 'b' are objects of similar structure, then produces a file containing both the metadata and data necessary to recreate 'b' both quickly and securely.
Assuming GE-Proton9-20 and GE-Proton9-21 are installed in the Downloads folder, and the user has Ed25519 ssh(1) keys:
$ cd python/umu_mkpatch
$ python __main__.py --source $HOME/Downloads/GE-Proton9-20 --target $HOME/Downloads/GE-Proton9-21 --ssh-private-key $HOME/.ssh/id_ed25519 --ssh-public-key $HOME/.ssh/id_ed25519_.pub > delta.cbor
Note
The SSH keys are used to sign and verify the patch data. Only the public key will be shared in the patch file, and it must not be password-protected.