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French translation - Fixes and enhancements
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adriantombu committed Oct 6, 2020
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* [한국어 문서](README_ko.md)
* [中文文档](README_zh.md)
* [Français](README_fr.md)

## Overview

This is a basic layout for Go application projects. It's not an official standard defined by the core Go dev team; however, it is a set of common historical and emerging project layout patterns in the Go ecosystem. Some of these patterns are more popular than others. It also has a number of small enhancements along with several supporting directories common to any large enough real world application.

If you are trying to learn Go or if you are building a PoC or a toy project for yourself this project layout is an overkill. Start with something really simple (a single `main.go` file is more than enough). As your project grows keep in mind that it'll be important to make sure your code is well structured otherwise you'll end up with a messy code with lots of hidden dependencies and global state. When you have more people working on the project you'll need even more structure. That's when it's important to introduce a common way to manage packages/libraries. When you have an open source project or when you know other projects import the code from your project repository that's when it's important to have private (aka `internal`) packages and code. Clone the repository, keep what you need and delete everything else! Just because it's there it doesn't mean you have to use it all. None of these patterns are used in every single project. Even the `vendor` pattern is not universal.

With Go 1.14 [`Go Modules`](https://github.com/golang/go/wiki/Modules) are finally ready for production. Use [`Go Modules`](https://blog.golang.org/using-go-modules) unless you have a specific reason not to use them and if you do then you don’t need to worry about $GOPATH and where you put your project. The basic `go.mod` file in the repo assumes your project is hosted on GitHub, but it's not a requirement. The module path can be anything though the first module path component should have a dot in its name (the current version of Go doesn't enforce it anymore, but if you are using slightly older versions don't be surprised if your builds fail without it). See Issues [`37554`](https://github.com/golang/go/issues/37554) and [`32819`](https://github.com/golang/go/issues/32819) if you want to know more about it.
With Go 1.14 [`Go Modules`](https://github.com/golang/go/wiki/Modules) are finally ready for production. Use [`Go Modules`](https://blog.golang.org/using-go-modules) unless you have a specific reason not to use them and if you do then you don’t need to worry about $GOPATH and where you put your project. The basic `go.mod` file in the repo assumes your project is hosted on GitHub, but it's not a requirement. The module path can be anything though the first module path component should have a dot in its name (the current version of Go doesn't enforce it anymore, but if you are using slightly older versions don't be surprised if your builds fail without it). See Issues [`37554`](https://github.com/golang/go/issues/37554) and [`32819`](https://github.com/golang/go/issues/32819) if you want to know more about it.

This project layout is intentionally generic and it doesn't try to impose a specific Go package structure.

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It's also a way to group Go code in one place when your root directory contains lots of non-Go components and directories making it easier to run various Go tools (as mentioned in these talks: [`Best Practices for Industrial Programming`](https://www.youtube.com/watch?v=PTE4VJIdHPg) from GopherCon EU 2018, [GopherCon 2018: Kat Zien - How Do You Structure Your Go Apps](https://www.youtube.com/watch?v=oL6JBUk6tj0) and [GoLab 2018 - Massimiliano Pippi - Project layout patterns in Go](https://www.youtube.com/watch?v=3gQa1LWwuzk)).

See the [`/pkg`](pkg/README.md) directory if you want to see which popular Go repos use this project layout pattern. This is a common layout pattern, but it's not universally accepted and some in the Go community don't recommend it.
See the [`/pkg`](pkg/README.md) directory if you want to see which popular Go repos use this project layout pattern. This is a common layout pattern, but it's not universally accepted and some in the Go community don't recommend it.

It's ok not to use it if your app project is really small and where an extra level of nesting doesn't add much value (unless you really want to :-)). Think about it when it's getting big enough and your root directory gets pretty busy (especially if you have a lot of non-Go app components).

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## Notes

A more opinionated project template with sample/reusable configs, scripts and code is a WIP.

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