Why Can\'t go mod tidy Find My Private GitHub Repository?

Unexpected Error: go mod tidy Struggles to Fetch Private GitHub Repository

When attempting to retrieve a private GitHub repository using go mod tidy, users may encounter an error indicating an inability to find the specified repository or invalid version. This issue often arises due to insufficient authentication.

Resolving the Authentication Issue:

As the error message suggests, you must ensure that you have properly configured your authentication settings.

Verifying the Import Path:

First, confirm that the import path provided is correct and matches the format specified in your go.mod file.

Authenticating with a GitHub Personal Access Token:

Create a GitHub Personal Access Token with the desired permissions and add an entry to your .netrc file using the token as the password:

machine github.com login <username> password <access_token></access_token></username>

Configuring Git Credentials:

Additionally, modify your .gitconfig file to authenticate with the same access token:

[url "https://{{username}}:{{access_token}}@github.com"]
    insteadOf = https://github.com

Disabling Sum Checking:

While disabling sum checking using GOSUMDB=off may allow go mod tidy to complete, it is not recommended as it compromises the security and integrity of your package dependencies.

Verifying GOPRIVATE Setting:

Ensure that your private repository is included in the GOPRIVATE environment variable, which specifies a comma-separated list of domains that should be treated as private.

GOPRIVATE=github.com/your-organization

By following these steps, you can successfully authenticate with your private GitHub repository and resolve the error encountered by go mod tidy.

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