This is very useful:

I am building an application that comprises multiple repos. I continue to procrastinate on whether using multiple repos vs. a monorepo was a good idea but, an issue that I have (had) is the need to ensure that the repos’ contents are using current|latest modules. GitHub can help.

Most of the application is written in Golang with a smattering of Rust and some JavaScript.

I think it would be valuable if Google were to provide volumes in Cloud Build of package registries (e.g. Go Modules; PyPi; Maven; NPM etc.).

Google provides a mirror of a subset of Docker Hub. This confers several benefits: Google’s imprimatur; speed (latency); bandwidth; and convenience.

The same benefits would apply to package registries.

In the meantime, there’s a hacky way to gain some of the benefits of these when using Cloud Build.

In the following example, I’ll show an approach using Golang Modules and Google’s module proxy aka proxy.golang.org.