How Can I Access Local Packages in Go Modules?

Accessing Local Packages in Go Modules (Go 1.11)

When working with Go modules, accessing local packages outside your gopath can be challenging. Consider the following project structure:

/
  - /platform
      - platform.go
  - main.go
  - go.mod

With this setup, importing the platform package in main.go would result in an error indicating the platform module cannot be found.

To address this issue, several approaches can be employed. One method is to ensure both packages reside within the same module. To do this, simply add the following to go.mod:

module github.com/userName/moduleName

Within main.go, you can then import the platform package using:

import "github.com/userName/moduleName/platform"

However, if the packages are in separate modules physically, you can still import local packages using the replace directive in the main module's go.mod file.

module github.com/userName/mainModule

require "github.com/userName/otherModule" v0.0.0
replace "github.com/userName/otherModule" v0.0.0 => "local physical path to the otherModule"

Within main.go, you can now import the platform package from the otherModule module:

import "github.com/userName/otherModule/platform"

Remember, the path in the replace directive should point to the root directory of the module being replaced.

For a comprehensive understanding of Go modules, refer to the following resource:

• [Go Modules](https://go.dev/blog/modules)

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