How to Handle Module Version Conflicts in Subfolders with Go Modules?

Managing Module Versions in Subfolders

Go modules provide a convenient mechanism for managing dependencies in Go projects. However, when a repository contains multiple go.mod files, including one in the root directory and another in a subfolder, the handling of module versions becomes more complex.

In your specific scenario, you are experiencing difficulties updating vault/api to version 1.3.3 while simultaneously inheriting the go.mod file from github.com/hashicorp/vault. This conflict arises due to the potential for version misalignment between the root module and its submodules.

Contrary to expectations, the versions of submodules are not necessarily synchronized with the versions of their parent modules. Instead, they should be treated as independent modules that reside in the same repository structure.

To resolve this issue, it is recommended that you refer to the official vault releases page: https://github.com/hashicorp/vault/releases. This page provides official version information and tags. Go allows for hierarchical Git tags to indicate submodule versions.

For instance, although vault itself is currently at version 1.3.3, vault/api remains at version 1.0.4 (based on the latest tag with api/v1.0.4). To acquire the latest version of vault/api, you can simply run go get without explicitly specifying a version in go.mod. The go tool will automatically locate and retrieve the most recent version.

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