ubuntu vm with golang

# -*- mode: ruby -*-
# vi: set ft=ruby :

# All Vagrant configuration is done below. The "2" in Vagrant.configure
# configures the configuration version (we support older styles for
# backwards compatibility). Please don't change it unless you know what
# you're doing.
Vagrant.configure("2") do |config|
  # The most common configuration options are documented and commented below.
  # For a complete reference, please see the online documentation at
  # https://docs.vagrantup.com.

  # Every Vagrant development environment requires a box. You can search for
  # boxes at https://atlas.hashicorp.com/search.
  config.vm.box = "ubuntu/xenial64"

  # Disable automatic box update checking. If you disable this, then
  # boxes will only be checked for updates when the user runs
  # `vagrant box outdated`. This is not recommended.
  # config.vm.box_check_update = false

  # Create a forwarded port mapping which allows access to a specific port
  # within the machine from a port on the host machine. In the example below,
  # accessing "localhost:8080" will access port 80 on the guest machine.
  config.vm.network "forwarded_port", guest: 8050, host: 8050

  # Create a private network, which allows host-only access to the machine
  # using a specific IP.
  # config.vm.network "private_network", ip: "192.168.33.10"

  # Create a public network, which generally matched to bridged network.
  # Bridged networks make the machine appear as another physical device on
  # your network.
  # config.vm.network "public_network"

  # Share an additional folder to the guest VM. The first argument is
  # the path on the host to the actual folder. The second argument is
  # the path on the guest to mount the folder. And the optional third
  # argument is a set of non-required options.
  # config.vm.synced_folder ".", "/work"

  # Provider-specific configuration so you can fine-tune various
  # backing providers for Vagrant. These expose provider-specific options.
  # Example for VirtualBox:
  #
  # config.vm.provider "virtualbox" do |vb|
  #   # Display the VirtualBox GUI when booting the machine
  #   vb.gui = true
  #
  #   # Customize the amount of memory on the VM:
  #   vb.memory = "1024"
  # end
  #
  # View the documentation for the provider you are using for more
  # information on available options.

  # Define a Vagrant Push strategy for pushing to Atlas. Other push strategies
  # such as FTP and Heroku are also available. See the documentation at
  # https://docs.vagrantup.com/v2/push/atlas.html for more information.
  # config.push.define "atlas" do |push|
  #   push.app = "YOUR_ATLAS_USERNAME/YOUR_APPLICATION_NAME"
  # end

  # Enable provisioning with a shell script. Additional provisioners such as
  # Puppet, Chef, Ansible, Salt, and Docker are also available. Please see the
  # documentation for more information about their specific syntax and use.
  config.vm.provision "shell", inline: <<-SHELL
    #!/bin/bash
    set -e

    VERSION="1.7.1"

    DFILE="go$VERSION.linux-amd64.tar.gz"

    if [ -d "$HOME/.go" ] || [ -d "$HOME/go" ]; then
        echo "Installation directories already exist. Exiting."
        exit 1
    fi

    echo "Downloading $DFILE ..."
    wget https://storage.googleapis.com/golang/$DFILE -O /tmp/go.tar.gz
    if [ $? -ne 0 ]; then
        echo "Download failed! Exiting."
        exit 1
    fi
    echo "Extracting ..."
    tar -C "$HOME" -xzf /tmp/go.tar.gz
    mv "$HOME/go" "$HOME/.go"
    touch "$HOME/.bashrc"
    {
        echo '# GoLang'
        echo 'export GOROOT=$HOME/.go'
        echo 'export PATH=$PATH:$GOROOT/bin'
        echo 'export GOPATH=/vagrant'
        echo 'export PATH=$PATH:$GOPATH/bin'
    } >> "$HOME/.bashrc"

    export GOROOT=$HOME/.go
    export PATH=$PATH:$GOROOT/bin
    export GOPATH=/vagrant
    export PATH=$PATH:$GOPATH/bin

    rm -f /tmp/go.tar.gz
  SHELL
end