From abf38106c0a35e0e77982f7c2cd49cf1f5a54c23 Mon Sep 17 00:00:00 2001
From: Chris Roberts <code@chrisroberts.org>
Date: Tue, 7 Mar 2017 10:36:14 -0800
Subject: [PATCH] Add shared helper method to detect if running version is
 prerelease

---
 lib/vagrant/shared_helpers.rb            |  8 ++++++++
 test/unit/vagrant/shared_helpers_test.rb | 12 ++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/lib/vagrant/shared_helpers.rb b/lib/vagrant/shared_helpers.rb
index ffe61e571..c5d6ea617 100644
--- a/lib/vagrant/shared_helpers.rb
+++ b/lib/vagrant/shared_helpers.rb
@@ -102,4 +102,12 @@ module Vagrant
 
     Pathname.new(path).expand_path
   end
+
+  # This returns true/false if the running version of Vagrant is
+  # a pre-release version (development)
+  #
+  # @return [Boolean]
+  def self.prerelease?
+    Gem::Version.new(Vagrant::VERSION).prerelease?
+  end
 end
diff --git a/test/unit/vagrant/shared_helpers_test.rb b/test/unit/vagrant/shared_helpers_test.rb
index c64a26001..2ebfc76a5 100644
--- a/test/unit/vagrant/shared_helpers_test.rb
+++ b/test/unit/vagrant/shared_helpers_test.rb
@@ -131,4 +131,16 @@ describe Vagrant do
       end
     end
   end
+
+  describe "#prerelease?" do
+    it "should return true when Vagrant version is development" do
+      stub_const("Vagrant::VERSION", "1.0.0.dev")
+      expect(subject.prerelease?).to be(true)
+    end
+
+    it "should return false when Vagrant version is release" do
+      stub_const("Vagrant::VERSION", "1.0.0")
+      expect(subject.prerelease?).to be(false)
+    end
+  end
 end