Go Call your code from another module
To do that, use the go mod edit command to edit the example.com/hello module to redirect Go tools from its module path (where the module isn't) to the local directory (where it is).
$ go mod edit -replace example.com/greetings=../greetings
Go Call your code from another module
For the purposes of this tutorial, use example.com/hello for the module path.
$ go mod init example.com/hello
go: creating new go.mod: module example.com/hello
Go Call your code from another module
After the command completes, the example.com/hello module's go.mod file should look like this:
module example.com/hello

go 1.16

replace example.com/greetings => ../greetings

require example.com/greetings v0.0.0-00010101000000-000000000000
Go Call your code from another module
The command specifies that example.com/greetings should be replaced with ../greetings for the purpose of locating the dependency. After you run the command, the go.mod file in the hello directory should include a replace directive:
module example.com/hello

go 1.16

replace example.com/greetings => ../greetings
Go Call your code from another module
For more on version numbers, see Module version numbering.
$ go run .
Hi, Gladys. Welcome!
Go Call your code from another module
To reference a published module, a go.mod file would typically omit the replace directive and use a require directive with a tagged version number at the end.
require example.com/greetings v1.1.0
Go Call your code from another module
For example, if your command prompt is in the greetings directory, you could use the following commands:
cd ..
mkdir hello
cd hello
Go Call your code from another module
To do that, paste the following code into hello.go.
package main

import (
    "fmt"

    "example.com/greetings"
)

func main() {
    // Get a greeting message and print it.
    message := greetings.Hello("Gladys")
    fmt.Println(message)
}
Go Call your code from another module
$ go mod tidy
go: found example.com/greetings in example.com/greetings v0.0.0-00010101000000-000000000000
Go Call your code from another module
After you create this directory, you should have both a hello and a greetings directory at the same level in the hierarchy, like so:
<home>/
 |-- greetings/
 |-- hello/

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