From 1c4a01d52c0c2986e08454afad5d6ed2177fcf52 Mon Sep 17 00:00:00 2001
From: Marc CARRE <carre.marc@gmail.com>
Date: Wed, 26 Oct 2016 11:16:11 +0100
Subject: [PATCH] Read Go version from Dockerfile in order to keep things
 'DRY'.

---
 vagrant-common.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/vagrant-common.rb b/vagrant-common.rb
index 704d024e..9c0c6b5b 100644
--- a/vagrant-common.rb
+++ b/vagrant-common.rb
@@ -1,4 +1,8 @@
-$go_version = "1.5.2"
+$go_regexp = /FROM golang:(\S*).*?/
+$go_version = File.readlines("build/Dockerfile").first { |line| line.match($go_regexp) }.match($go_regexp).captures.first
+if $go_version.nil?
+  raise ArgumentError.new("Failed to read Go version from Dockerfile.")
+end
 
 $go_path = "/usr/local/go/bin"