How Do I Import a Local Go Module Without Pushing it to a Remote Repository?

Referencing a Go Module That Is Local

This article addresses the issue of importing a package from a local Go module, which has been encountered by a user who attempted to use a module without first pushing it to a GitHub repository.

The Problem

Upon attempting to import a locally created module, the user encountered the following error:

cannot load github.com/Company/mymodule: cannot find module providing package github.com/Company/mymodule

The Cause

This error occurs because Go attempts to resolve third-party modules by fetching them from their designated remote URLs. In this case, since the module had not yet been pushed to GitHub, Go was unable to locate it.

The Solution

To use a local module, the user can employ the replace keyword in their go.mod file:

replace github.com/Company/mymodule v0.0.0 => ../mymodule

This informs Go of the correct location of the local dependency.

Additional Notes

After testing and pushing the module to a repository, the replace line can be removed from go.mod. To correctly use the module alongside the current project, the following command can be used:

go get -u github.com/Company/mymodule

Additionally, it is essential to ensure that functions and variables in Go packages start with capital letters to be accessible from outside the package.

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