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feat(appimage): publish zsync files for delta updates - #49
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AppImages had no update information, so AppImageUpdate could not update them and every update meant downloading the whole bundle. Embed a gh-releases-zsync update string in the AppImage and have the build fail when the matching .zsync file is missing. The release workflows now carry the .zsync files as artifacts, require them for both architectures, list them in checksums.txt and attach them to the GitHub release. The update string matches the versioned AppImage names, so it keeps working across releases. Releases made before this change cannot be updated this way.
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Embeds
gh-releases-zsync|luminusOS|zaptide|latest|zaptide-*-<arch>.AppImage.zsyncin the AppImage and publishes the generated.zsyncfiles with each release, so AppImageUpdate can fetch only changed blocks.build.shexportsUPINFOand fails if the.zsyncis missing.zsyncfiles for x86_64 and aarch64Not verified: a full AppImage build. The
.zsyncis assumed to be named<AppImage>.zsync; the build'stest -sfails loudly if not. Only releases made after this change can be updated this way.