Add an osfamily fact to define Sabayon as a Gentoo derivative

lib/facter/osfamily.rb

@@ -0,0 +1,39 @@
+# Fact: osfamily
+#
+# Purpose: Returns the operating system
+#
+# Resolution:
+#   Maps operating systems to operating system families, such as linux
+#   distribution derivatives. Adds mappings from specific operating systems
+#   to kernels in the case that it is relevant.
+#
+# Caveats:
+#   This fact is completely reliant on the operatingsystem fact, and no
+#   heuristics are used
+#
+
+Facter.add(:osfamily) do
+
+  has_weight(10)
+
+  setcode do
+    case Facter.value(:operatingsystem)
+    when "RedHat", "Fedora", "CentOS", "Scientific", "SLC", "Ascendos", "CloudLinux", "PSBM", "OracleLinux", "OVS", "OEL", "Amazon", "XenServer"
+      "RedHat"
+    when "LinuxMint", "Ubuntu", "Debian", "CumulusLinux"
+      "Debian"
+    when "SLES", "SLED", "OpenSuSE", "SuSE"
+      "Suse"
+    when "Solaris", "Nexenta", "OmniOS", "OpenIndiana", "SmartOS"
+      "Solaris"
+    when "Gentoo", "Sabayon"
+      "Gentoo"
+    when "Archlinux"
+      "Archlinux"
+    when "Mageia", "Mandriva", "Mandrake"
+      "Mandrake"
+    else
+      Facter.value("kernel")
+    end
+  end
+end