Generate .zsync file for delta updates

[Samueru-sama]

This is used for updating the AppImage with AppImageUpdate.

[psadi]

Hey, thanks for this. I've been wanted to add this (was exploring how this works)

We should add some docs in the update section to provide more insights on how to make use of the incremental updates.

Could you assist in adding those ?

[Samueru-sama]

Done just added the information.

Right now there is only two tools that make use of AppImageUpdate, thsoe are AM and the go-appimage daemon.

• AppImageLauncher also uses something similar, however right now AppImageLauncher is not compatible with the static appimage runtime which is used by this appimage. This is something that the developer is aware and is working on fixing.

• Gearlever also lets you update the appimage, but last time I saw you have to manually give it the url to the github repo for it to check for updates instead of using the embedded update information with zsync.

[psadi]

@Samueru-sama - Thanks a bunch, LGTM! :)