Merge pull request #705 from Icinga/enhancement/version_fact

Add a fact to get the installed icinga2 version

lib/facter/icinga2_version.rb

@@ -0,0 +1,22 @@
+Facter.add('icinga2_version') do
+  confine { Facter::Core::Execution.which('icinga2') }
+  confine kernel: 'linux'
+  setcode do
+    icinga2_ver = Facter::Core::Execution.execute("icinga2 -V|grep 'version: r'")
+    icinga2_ver.match(%r{\d+\.\d+\.\d+})[0] if icinga2_ver
+  end
+end
+
+Facter.add('icinga2_version') do
+  confine kernel: 'windows'
+  setcode do
+    tmp = Facter::Core::Execution.which('icinga2.exe')
+    file = if tmp
+             tmp
+           else
+             'C:/Program Files/ICINGA2/sbin/icinga2.exe'
+           end
+    cmd  = "#{file.split(':').first}:\"#{file.split(':').last.tr('/', '\\')}\" -V 2>&1"
+    Facter::Core::Execution.execute("cmd /C #{cmd}").lines.grep(%r{version: (r|v)?\d+\.\d+\d+}).first.split(':').last.delete('vr)').strip if File.executable?(file)
+  end
+end