How to import internals packages in Go ?
import (
"runtime/internal/atomic"
"runtime/internal/sys"
)
Like this without get a error:
imports runtime/internal/atomic: use of internal package not allowed
And use internal funcs in a main package ?
As we discussed, there are two types of packages. An executable package and a utility package.
Packages are the most powerful part of the Go language. The purpose of a package is to design and maintain a large number of programs by grouping related features together into single units so that they can be easy to maintain and understand and independent of the other package programs.
In Go, a package is a directory of .go files, and packages form the basic building blocks of a Go program. Using packages, you organize your code into reusable units. A module, on the other hand, is a collection of Go packages, with dependencies and versioning built-in.
The first statement in a Go source file must be package name . Executable commands must always use package main .
Go encourages structuring a program as a collection of packages interacting using exported APIs. However, all packages can be imported. This creates a tension when implementing a library or command: it may grow large enough to structure as multiple packages, but splitting it would export the API used in those additional packages to the world. Being able to create packages with restricted visibility would eliminate this tension.
An import of a path containing the element “internal” is disallowed if the importing code is outside the tree rooted at the parent of the “internal” directory.
You can't (at least easily) and you shouldn't.
I will show you how I use internal nettest package:
// I copied nettest to vendor with `dep ensure` I think. Then:
mkdir vendor-local
cp -r vendor/golang.org/x/net/internal/nettest ./vendor-local/nettest
vim ./vendor-local/nettest/stack.go and remove import comment // import "foo" [1]
// Use full import in your go file:
import "github.com/foo-user/bar-project/vendor-local/nettest"
[1]: https://github.com/golang/net/blob/a8b9294777976932365dabb6640cf1468d95c70f/internal/nettest/stack.go#L6
Docs about import comments
You may find all import comments in your internal package with grep -r "// import" ./vendor-local/nettest
You can, but utils like dep ensure
that don't support local packages will purge your copy.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With