1 files changed, 52 insertions, 0 deletions
diff --git a/lib/ci/version_info.rb b/lib/ci/version_info.rb
new file mode 100644
index 00000000000..2a87c91db5e
--- /dev/null
+++ b/lib/ci/version_info.rb
@@ -0,0 +1,52 @@
+class VersionInfo
+  include Comparable
+
+  attr_reader :major, :minor, :patch
+
+  def self.parse(str)
+    if str && m = str.match(/(\d+)\.(\d+)\.(\d+)/)
+      VersionInfo.new(m[1].to_i, m[2].to_i, m[3].to_i)
+    else
+      VersionInfo.new
+    end
+  end
+
+  def initialize(major = 0, minor = 0, patch = 0)
+    @major = major
+    @minor = minor
+    @patch = patch
+  end
+
+  def <=>(other)
+    return unless other.is_a? VersionInfo
+    return unless valid? && other.valid?
+
+    if other.major < @major
+      1
+    elsif @major < other.major
+      -1
+    elsif other.minor < @minor
+      1
+    elsif @minor < other.minor
+      -1
+    elsif other.patch < @patch
+      1
+    elsif @patch < other.patch
+      -1
+    else
+      0
+    end
+  end
+
+  def to_s
+    if valid?
+      "%d.%d.%d" % [@major, @minor, @patch]
+    else
+      "Unknown"
+    end
+  end
+
+  def valid?
+    @major >= 0 && @minor >= 0 && @patch >= 0 && @major + @minor + @patch > 0
+  end
+end