Install docker-compose

Vagrantfile

@@ -17,4 +17,7 @@ Vagrant.configure("2") do |config|
 
   SHELL
 
+  # Install newest docker-compose
+  config.vm.provision "shell", path: "install-compose.sh"
+
 end

install-compose.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Github username and repo name
+user="docker"
+repo="compose"
+
+# Retrieve the latest version number
+addr="https://github.com/$user/$repo/releases/latest"
+page=$(curl -s $addr | grep -o releases/tag/*.*\")
+version=$(echo $page | awk '{print substr($1, 14, length($1) - 14)}')
+
+# Download prep
+url="https://github.com/$user/$repo/releases/download/$version"
+file="docker-compose-$(uname -s)-$(uname -m)"
+
+# Download latest Docker Compose if that version hasn't been downloaded
+if [ ! -f /tmp/docker_compose_$version ]; then
+  curl -L $url/$file -o /tmp/docker-compose_$version
+fi
+
+# Is it already installed?
+if installed=$(which docker-compose); then
+
+  new_chksum=$(sha256sum /tmp/docker-compose_$version)
+  old_chksum=$(sha256sum /usr/local/bin/docker-compose)
+
+  # If checksums are different, delete and install new version
+  if [ ! "$new_chksum" = "$old_chksum" ]; then
+    rm /usr/local/bin/docker-compose
+    mv /tmp/docker-compose_$version /usr/local/bin/docker-compose
+    chmod +x /usr/local/bin/docker-compose
+  fi
+
+else
+  # It's not installed, so no need to remove
+  mv /tmp/docker-compose_$version /usr/local/bin/docker-compose
+  chmod +x /usr/local/bin/docker-compose
+fi