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Development Environment

You have two choices for working with this repository:

  • You can use vagrant/virtualbox
  • You can have a Go 1.7 installation on your computer

If you are using Vagrant/Virtualbox, you need to install VirtualBox first, then Vagrant.

If you have Go 1.7 installed, you'll need to set your GOPATH to the root of this repository. You can do that manually, or use direnv. I strongly recommend using direnv! See below for instructions.

Vagrant Usage

The vagrant setup in this repository will share the src directory to /home/vagrant/src and set your GOPATH in the virtual machine to /home/vagrant.

It also adds /home/vagrant/bin to your $PATH so that any executables that you build or install will be in your path when you're working inside the VM.

Starting

vagrant up

Entering the VM

vagrant ssh

Shared Directories & Editing

The src directory of this repo is available inside the VM as /home/vagrant/src. Changes you make on your host computer will be available inside the vm immediately. This means that you can edit using your favorite text editor (Sublime Text, Atom, Visual Studio Code, {neo}Vim, Emacs, etc) but use the vagrant ssh session to compile and run.

Testing Vagrant Setup

vagrant ssh
go build hello

This should compile the hello/main.go file at /home/vagrant/src/hello/main.go

go install hello
hello

This should compile and install the hello app, then run it.

Local Setup

Local setup requires that the GOPATH be set to the root of this repository:

export GOPATH=`pwd`

Test this by building the hello package:

go build hello
go install hello

Building packages and binaries will put compiled output in the bin and pkg directories.

Add bin to your PATH:

export PATH=`pwd`:$PATH

Test this by running hello.

Direnv is a useful utility to do all this for you.

DIRENV Setup

These training materials are expected to be a standalone GOPATH. You can make your life easy by installing direnv. direnv must be located somewhere in your $PATH to work. My suggestion is to add the bin directory of your $GOPATH to your path if you haven't already.

For bash, modify ~/.bashrc so that $GOPATH/bin is in your binary search path:

export PATH=$GOPATH/bin:$PATH

Now install direnv cd to $HOME go get github.com/direnv/direnv

For direnv to work properly it needs to be hooked into the shell. Each shell has its own extension mechanism:

BASH

Add the following line at the end of the "~/.bashrc" file:

eval "$(direnv hook bash)"

Make sure it appears even after rvm, git-prompt and other shell extensions that manipulate the prompt.

ZSH

Add the following line at the end of the "~/.zshrc" file:

eval "$(direnv hook zsh)"

FISH

Add the following line at the end of the "~/.config/fish/config.fish" file:

eval (direnv hook fish)

TCSH

Add the following line at the end of the "~/.cshrc" file:

eval `direnv hook tcsh`

Restart Shell

After making any of these modifications, close and reopen your shell session.

The first time you enter a directory with an .envrc file you'll be prompted to allow direnv to make changes to your environment.

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