How to Install Go Tools with Go Modules Without Modifying go.mod?

Installing Go Tools with Go Modules

When using Go modules for dependency management, attempting to install a tool may result in an error if no main module is found.

To resolve this issue, consider the following scenarios:

Scenario 1: Installing Tools Without Modifying go.mod

If you don't want to track the tool as a dependency in your current module, here are two options:

• Change to a directory without a go.mod:

$ cd /tmp
$ go get github.com/some/[email protected]

• Use gobin, a module-aware command that allows you to install and run binaries without modifying your go.mod:

$ go install golang.org/x/tools/cmd/stringer

Scenario 2: Tracking Tools as Dependencies in go.mod

To explicitly track a tool as a dependency in your go.mod:

• Create a tools.go file in a separate package with a //go:build tools build tag:

//go:build tools
// +build tools

package tools

import (
    _ "golang.org/x/tools/cmd/stringer"
)

• The import statements allow the go command to record the tool's version information in your go.mod, while the build constraint ensures that the tools are not imported during regular builds.

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