Can Go\'s Internal Packages Be Imported from Outside Their Parent Directory?

Unveiling the Secrets of Internal Packages in Go

Importing internal packages in Go is a topic shrouded in mystery. Let's delve into this enigma and attempt to shed some light on it.

Background: The Internal Package Concept

Go embraces a modular approach to program organization, encouraging the use of packages with clear boundaries and exported APIs. However, the lack of access restrictions on package imports can pose a dilemma when designing larger libraries or commands. Internal packages emerged as a solution, providing a way to limit the visibility of code within a specific project.

Restricted Imports: Internal Package Rule

A proposed rule for Go 1.4 introduced restrictions for importing internal packages. Specifically, importing a path containing "internal" is prohibited for code outside the tree rooted at the parent of that directory. This rule aims to enforce the intended private nature of internal packages.

Short and Definitive Answer

Importing internal packages outside their intended context is not recommended nor straightforward in Go. Internal packages serve a specific purpose within a project and should generally remain isolated to maintain encapsulation and code organization principles.

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