Question 1

How do I set up go-selfupdate with AWS S3 for hosting updates?

Accepted Answer

Upload the generated 'public' folder to an S3 bucket configured for static hosting, then set the ApiURL, BinURL, and DiffURL in your Updater config to the bucket's HTTP endpoints, ensuring proper CORS and permissions are in place.

Question 2

go-selfupdate vs. other Go update libraries like go-update?

Accepted Answer

go-selfupdate focuses on minimalism and binary diffs with bsdiff for bandwidth efficiency, while go-update might offer more integrated features or different hosting options. Choose go-selfupdate for fine-grained control over update protocols and patch-based delivery.

Question 3

Does go-selfupdate support signed updates for security?

Accepted Answer

It relies on SHA256 hashes for verification but does not include built-in digital signature validation. For higher security, you must implement custom signing in your update manifest and verify it manually in your application code.

Question 4

How to handle application restart after an update in go-selfupdate?

Accepted Answer

Use the OnSuccessfulUpdate hook to define a restart function, such as calling os.Exit(0) for a simple exit or integrating with a graceful restart library, as the README suggests leaving the restart logic to the developer.

Question 5

Can go-selfupdate be used for cross-compiled Go applications?

Accepted Answer

Yes, it supports cross-compilation by expecting binaries named in the format $GOOS-$ARCH, and the CLI tool can generate updates from a directory of compiled binaries for multiple platforms, as shown in the QuickStart section.

Question 6

What happens if an update fails during the patch application?

Accepted Answer

If a patch fails SHA verification, go-selfupdate falls back to downloading the full binary, but if that also fails, the update process stops, and the application continues running with the old version without automatic retry mechanisms.

go-selfupdate

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