Can Multiple Go Packages Coexist in a Single Directory?

Handling Multiple Packages in the Same Directory

Question:

Is it viable to maintain two packages within a single directory?

Background:

In a scenario where a project encompasses both a library and a command-line interface (CLI), the question arises whether it makes sense to structure them as separate packages within the same directory. The concern stems from potential conflicts when compiling the project, as the package main and func main declarations are essential for running the CLI but conflict with the package myproject declaration required for the library.

Answer:

To resolve this issue, it is recommended to create a new subfolder within the main directory and move either the library or the CLI to the new folder. This ensures isolation between the two packages and avoids naming conflicts.

Solution:

1. Create a new folder, such as lib or bin, within the main project directory.
2. Move either the library (myproject.go) or the CLI (main.go) to the new folder.
3. Ensure that the moved package is imported in the other package using the correct $GOPATH reference.

Example:

Consider the following example structure:

whatever.io/
    myproject/
        main.go
        lib/
            myproject.go

In this case, the library myproject has been moved to the lib subfolder. The main.go file can now import the library using:

import "../lib/myproject"

This approach preserves the organization of the project while resolving the compilation conflict.

Additional Resources:

• [go build vs go build file.go](https://stackoverflow.com/questions/29096547/go-build-vs-go-build-file-go)

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