GO111MODULE: How to Manage Module Compatibility When Working with Development Branches?

GO111MODULE: Managing Module Compatibility During Development

When working on a new feature or fixing a bug, developers may need to test changes against a development branch of a dependency. Using the GO111MODULE environment variable allows for this, but it can sometimes lead to errors.

Module Loading Error

When attempting to retrieve a development branch using "go get -u github.com/junegunn/fzf@devel" with GO111MODULE=on, an error may occur:

go: error loading module requirements

Root Cause

This error arises because one of the dependencies (gopkg.in/DATA-DOG/go-sqlmock.v1) is incompatible with the module path convention used by other dependencies. In version 1.3.3 of go-sqlmock, the use of non-version suffixed module paths violates the convention.

Workaround

To bypass this error and retrieve the devel branch of fzf without updating dependencies, execute the following command:

go get github.com/junegunn/fzf

Omit the "-u" flag to avoid fetching updates for dependencies.

Alternatively, you can update the dependencies as suggested in the open pull request: https://github.com/gdamore/tcell/pull/267

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