How to set GOPRIVATE environment variable

I started working on a Go project and it uses some private modules from Github private repos and whenever I try to run go run main.go it gives me a below 410 Gone error:


verifying github.com/repoURL/go-proto@v2.86.0+incompatible/go.mod: github.com/repoURL/go-proto@v2.86.0+incompatible/go.mod: reading https://sum.golang.org/lookup/github.com/!repoURL/go-proto@v2.86.0+incompatible: 410 Gone

I can easily clone private repo from terminal which means my ssh keys are configured correctly. I read here that I need to set GOPRIVATE environment variable but I am not sure how to do that.

Can anyone answer or point to the relevant tutorial?

Go: v1.13, OS: macOS Mojave

Short Answer:
go env -w GOPRIVATE=github.com/repoURL/private-repo


OR

If you want to allow all private repos from your organization
go env -w GOPRIVATE=github.com//*


Long Answer:

Check "Module configuration for non-public modules" for more information:

The GOPRIVATE environment variable controls which modules the go command considers to be private (not available publicly) and should therefore not use the proxy or checksum database. The variable is a comma-separated list of glob patterns (in the syntax of Go's path.Match) of module path prefixes. For example,

GOPRIVATE=*.corp.example.com,rsc.io/private

causes the go command to treat as private any module with a path prefix matching either pattern, including git.corp.example.com/xyzzy, rsc.io/private, and rsc.io/private/quux.

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The 'go env -w' command (see 'go help env') can be used to set these variables for future go command invocations.

Note on the usage of ssh:

If you use ssh to access git repo (locally hosted), you might want to add the following to your ~/.gitconfig:
[url "ssh://git@git.local.intranet/"]
insteadOf = https://git.local.intranet/


for the go commands to be able to access the git server.

Stack Overflow Q#58305567, score: 211