[ANN] go-update: build self-updating Golang programs

[Alan Shreve]

Hiya Gophers -

https://github.com/inconshreveable/go-update is a cross-platform package that allows you to build Go programs which can update themselves to new versions from the internet or anywhere else. This is the package I use to implement the auto-updating functionality for ngrok.

go-update supports:

- Binary patch application

- Checksum validation with a pluggable hash function

- Cryptographic signature verification with pluggable crypto functions (ecdsa and rsa out of the box)

- Windows!

There are a lot more details in the documentation:

https://godoc.org/github.com/inconshreveable/go-update

This package was originally released ~2 years ago, but I’m rereleasing it now with a new, redesigned API that incorporates lessons learned in API design and the problem domain itself.

For those of you looking for a complete updating solution with all the server bits and integration with your build process to do the code signing and such, we’re building out https://equinox.io for this. If that’s interesting to you, just drop us your email address: https://equinox.io/auth/signup or contact me personally. I’ll also send out another post to the list when it’s ready for public consumption.

Enjoy!

- alan

[Carlos Castillo]

How does one create a binary diff for use with the built-in BSDiffPatcher?

The package which provides the algorithm is internal to go-update so I can't write a tool myself to do the job, perhaps you should provide one with the package or make the library not internal.

[Thorsten Sommer]

Dear Alan,

thank you for this nice package :) This is a great idea. Keep that good work.


Regards,
Thorsten

[Alan Shreve]

There are a number of ways to do that, but the easiest will probably be just to use the `bsdiff` tool, which you can get via the usual ways: brew install bsdiff, apt-get install bsdiff.

More information on that is here:

http://www.daemonology.net/bsdiff/

Or programmatically in Go using the library that go-update is vendoring: https://github.com/kr/binarydist

- alan

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