Why Am I Getting an \"Unexpected Module Path\" Error When Using \"go get\" on a Forked GitHub Repo?

Go Get Unexpected Module Path Error on Forked GitHub Repo

Encountering the "unexpected module path" error when using "go get" on a forked GitHub repository can be frustrating. This error typically occurs when the module path specified in go.mod doesn't match the expected path after forking the repository.

Understanding the Error

The error message indicates that the go.mod file in your project contains a module path that doesn't align with the actual module path on the GitHub repository. When you fork a repository, the module path typically changes from the original repository to reflect the forked version.

Solution: Using replace in go.mod

To resolve this issue, you can utilize the replace directive in your go.mod file. This directive allows you to map a specific module path to another version or repository. In the case of a forked repository:

1. Edit your go.mod file and add the following lines:

   require github.com/awslabs/goformation v1.4.1
   
   replace github.com/awslabs/goformation => github.com/vrealzhou/goformation master

2. The first line specifies the required version of the original repository (in this case, v1.4.1).
3. The second line uses the replace directive to map the github.com/awslabs/goformation module path to the forked repository github.com/vrealzhou/goformation and points it to the master branch.

Additional Notes

• The master branch should be replaced with the branch that contains the customizations you've made.
• When building or testing for the first time, the master branch will be replaced with the latest pseudo-version for your fork, ensuring repeatable builds.
• The replace directive requires a specific version for the replacement.

With these steps, you should be able to successfully use the forked repository without encountering the "unexpected module path" error.

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