How Can I Pin Go Module Dependencies to Specific Git Commits?

Customizing Go Module Dependencies to Point to Specific Commits

Go modules provide a mechanism for managing package dependencies in Go projects. By default, modules use the latest released version of a dependency. However, there may be instances where you require functionality not included in a published release.

Manual Dependency Specification

One approach to specifying a custom dependency is to modify the go.mod file manually. This can be achieved by appending the desired commit hash to the module version, as demonstrated below:

module /my/module

require (
    ...
    github.com/someone/some_module v0.0.0-20181121201909-af044c0995fe
    ...
)

Go Get Command

A simpler method is to use the go get command with the desired commit hash:

go get github.com/someone/some_module@af044c0995fe

This command will automatically update the go.mod and go.sum files to reflect the custom dependency.

Advantages of Using Go Get

Compared to manual modification of the go.mod file, using go get offers several advantages:

• Simplicity: No need to manually construct the module version string.
• Accuracy: The command automatically retrieves the latest commit information, ensuring correctness.
• Automatic dependency updates: go get manages both go.mod and go.sum, ensuring that dependency information is consistent.

For further information, refer to the Go Wiki page on modules: https://github.com/golang/go/wiki/Modules#how-to-upgrade-and-downgrade-dependencies

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