implement syslog_ng_version fact

README.md

@@ -13,6 +13,7 @@
     * [What syslog_ng affects](#what-syslog_ng-affects)
     * [Getting started with syslog_ng](#beginning-with-syslog_ng)
 4. [Usage - Configuration options and additional functionality](#usage)
+    * [Facts](#facts)
     * [Classes and defined types](#classes-and-defined-types)
 5. [Implementation details](#implementation-details)
 5. [Limitations - OS compatibility, etc.](#limitations)
@@ -151,6 +152,10 @@ Before the generated configuration would be applied, it is written to a temporar
  it overwrites the real configuration file. So you do not have to worry about
  configuration errors.
 
+### Facts
+
+The fact `syslog_ng_version` contains the installed version string *e.g.* `3.7.1`
+
 ### Classes and defined types
 
 ####Class: `syslog_ng`

lib/facter/syslog_ng_version.rb

@@ -0,0 +1,6 @@
+Facter.add(:syslog_ng_version) do
+  setcode do
+    Facter::Util::Resolution.exec("/usr/sbin/syslog-ng --version").lines.find { |l| l =~ /^syslog-ng/}.split(' ')[1]
+  end
+end
+

spec/unit/facter/syslog_ng_version_spec.rb

@@ -0,0 +1,30 @@
+require "spec_helper"
+
+describe Facter::Util::Fact do
+  before {
+    Facter.clear
+  }
+
+  describe "syslog_ng" do
+    context 'returns version' do
+      it do
+        output = <<-EOS
+syslog-ng 3.7.1
+Installer-Version: 3.7.1
+Revision:
+Compile-Date: Aug 17 2015 14:25:00
+Available-Modules: afamqp,basicfuncs,linux-kmsg-format,csvparser,system-source,sdjournal,afsmtp,afmongodb,mod-java,riemann,afsocket,cryptofuncs,trigger-source,afstomp,lua,confgen,rust,rss,afuser,affile,afsql,dbparser,tfgetent,geoip-plugin,graphite,pseudofile,mod-perl,kvformat,grok-parser,json-plugin,afprog,basicfuncs-plus,monitor-source,syslogformat,mod-python,date-parser
+Enable-Debug: off
+Enable-GProf: off
+Enable-Memtrace: off
+Enable-IPv6: on
+Enable-Spoof-Source: off
+Enable-TCP-Wrapper: off
+Enable-Linux-Caps: off
+        EOS
+        Facter::Util::Resolution.expects(:exec).with("/usr/sbin/syslog-ng --version").returns(output)
+        Facter.value(:syslog_ng_version).should == "3.7.1"
+      end
+    end
+  end
+end