Some Go Tutorials

Getting Started

This code is my playground based on examples at https://tour.golang.org/list

To run the hello entrypoint:

Simple way

go run hello.go

As PATH executable

Follow below steps:

• set GOPATH and place on PATH

export GOPATH=/home/alex/Code/go
export PATH=$PATH:$GOPATH/bin

• run go install hello.go
• run entrypoint via hello

Using modules and packages

Source is https://golang.org/doc/code.html

Key concepts

Env vars

// Set GOPATH
export GOPATH=$HOME/go
export PATH="$PATH:${GOPATH//://bin:}/bin"

Modules

A repository contains one or more modules. A module is a collection of related Go packages that are released together. A Go repository typically contains only one module, located at the root of the repository. A file named go.mod there declares the module path: the import path prefix for all packages within the module. The module contains the packages in the directory containing its go.mod file as well as subdirectories of that directory, up to the next subdirectory containing another go.mod file (if any).

// Build compiles the packages named by the import paths, along with their dependencies, but it does not install the results
go build hello.go

Packages

Go programs are organized into packages. A package is a collection of source files in the same directory that are compiled together. Functions, types, variables, and constants defined in one source file are visible to all other source files within the same package.

Sublime Packages Installed

• Gofmt
• Golang Build

Getting Goimports to run automatically in Sublime Text

Thank you https://www.alexedwards.net/blog/streamline-your-sublime-text-and-go-workflow!

• Install Gofmt Sublime packages
• Install Goimports from command line: go get golang.org/x/tools/cmd/goimports
• In Gofmt Settings-User, add:

{
  "cmds": [
    ["goimports"]
  ],
  "format_on_save": true
}

• Restart Sublime

// Fetch external package via CLI
go get golang.org/x/tour

// Compile and install packages named by import paths in a go file
go install hello.go

// Run package
hello