Go Playground

Simple project with examples and experiments around the Go language.

Setup

1. Check .tool-versions for the Golang used version.
2. Run main with go run . or build an executable with go build (dependencies are downloaded automatically)
3. To install dependencies declared in go.mod explicitly use go mod download.

How to Modules

To start a new project in Go

1. Create a new module go mod init <module>
   1. Module name by conventions is <host>/<user>/<module>
   2. Where host is github.com, user or company that manages the module and finally module name.
   3. This will create a go.mod file with the module name and the Go version used. It will also contain dependencies and their versions
2. Every module needs a main package and a main function which will be the entry point (file doesn't need to be called main.go)
3. To add a dependency, use go get <module> it will be added to the go.mod file and the go.sum file (which contains the checksum for integrity check)
4. Only methods and variables starting with upper case can be used from other modules

Other useful commands:

1. go mod tidy to remove unused dependencies or add missing ones.
2. go mod vendor to create a vendor folder with all the dependencies.
3. go install downloads and install a package. It will be available in $GOPATH/bin
4. gofmt -w . format