Why Am I Getting \'use of internal package not allowed\' in My Forked Go Project?

Go: Unveiling the 'Use of Internal Package Not Allowed' Error in GitHub Forked Projects

While navigating the intricacies of Go, you may encounter the enigmatic "use of internal package not allowed" error when running test code from a forked GitHub repository. This perplexing message stems from the concept of internal and external packages in the Go package system.

In this context, internal packages, as the name suggests, are designed for internal usage within a specific repository and are not intended to be used by external projects. This restriction is meant to prevent accidental code sharing and to maintain encapsulation.

To resolve this error when running a forked Go project, it is crucial to understand that the paths of dependencies within the code must remain consistent with the original repository. This means that when you fork a Go repository, you must not alter the import paths of the dependencies used in the code.

The Go package system does not natively support repository forks. To work with a forked repository, you must clone it and maintain the same directory structure as the original. This ensures that the import paths match the forked GitHub repository.

For instance, if you fork the repository https://github.com/ethereum/go-ethereum, you should clone it into the $GOPATH/src/github.com/ethereum directory. By preserving this structure, Go's import system can recognize the location of the forked code and the dependencies it requires.

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