Should I Migrate from Dep to Go Modules?

Migrating from Dep to Go Modules

Dep is a dependency management tool for Go, while Go modules are the native dependency management system integrated into the Go toolchain. Migrating from Dep to Go modules is essential to keep up with the latest Go development practices and to access the benefits of built-in dependency management.

Migration Process:

1. Confirm Go Version: Ensure you're using Go 1.11 or later by running go version.
2. Configure Module Usage: Move your code outside of GOPATH to enable implicit module usage or set the GO111MODULE environment variable to "on".
3. Initialize a Module: Use go mod init followed by your module path to initialize a new module and import dependencies from Gopkg.lock.
4. Cleanup Dependencies: Run go mod tidy to remove unnecessary dependencies and add missing ones.
5. Remove Vendor Folder (Optional): Delete the vendor folder if you no longer need it. Note that keeping the vendor folder is incompatible with Go modules.
6. Build and Verify: Run go build to test if everything works as expected.
7. Cleanup Dep Files: Delete the obsolete Dep files Gopkg.lock and Gopkg.toml.

Alternative with Vendor Folder:

If you wish to keep your vendor folder, follow steps 1-6 as above, then:

8. Copy Dependencies to Vendor Folder: Run go mod vendor to copy dependencies into the vendor folder.
9. Build with Vendor Folder: Use go build -mod=vendor to ensure Go uses the vendor folder when building.

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