Add splunkforwarder_version fact

lib/facter/splunkforwarder_version.rb

@@ -0,0 +1,19 @@
+Facter.add('splunkforwarder_version') do
+  setcode do
+    value = nil
+    if File.exists?('C:\Program Files\SplunkUniveralForwarder\bin\splunk.exe')
+      cmd = 'C:\Program Files\SplunkUniveralForwarder\bin\splunk.exe --version'
+    elsif File.exists?('/opt/splunkforwarder/bin/splunk')
+      cmd = '/opt/splunkforwarder/bin/splunk --version'
+    else
+      cmd = nil
+    end
+    if cmd
+      output = Facter::Util::Resolution.exec(cmd)
+      if output =~ /^Splunk Universal Forwarder ([0-9\.]+) \(/
+        value = $1
+      end
+    end
+    value
+  end
+end

spec/spec_helper.rb

@@ -1,6 +1,9 @@
 # This file is managed via modulesync
 # https://github.com/voxpupuli/modulesync
 # https://github.com/voxpupuli/modulesync_config
+RSpec.configure do |c|
+  c.mock_with :rspec
+end
 require 'puppetlabs_spec_helper/module_spec_helper'
 require 'rspec-puppet-facts'
 include RspecPuppetFacts

spec/unit/facter/splunkforwarder_version_spec.rb

@@ -0,0 +1,24 @@
+require 'spec_helper'
+
+describe 'splunkforwarder_version Fact' do
+  before(:each) { Facter.clear }
+
+  it 'returns version for Windows' do
+    allow(File).to receive(:exists?).with('C:\Program Files\SplunkUniveralForwarder\bin\splunk.exe').and_return(true)
+    allow(Facter::Util::Resolution).to receive(:exec).with('C:\Program Files\SplunkUniveralForwarder\bin\splunk.exe --version').and_return('Splunk Universal Forwarder 7.0.2 (build 03bbabbd5c0f)')
+    expect(Facter.fact(:splunkforwarder_version).value).to eq('7.0.2')
+  end
+
+  it 'returns version for Linux' do
+    allow(File).to receive(:exists?).with('C:\Program Files\SplunkUniveralForwarder\bin\splunk.exe').and_return(false)
+    allow(File).to receive(:exists?).with('/opt/splunkforwarder/bin/splunk').and_return(true)
+    allow(Facter::Util::Resolution).to receive(:exec).with('/opt/splunkforwarder/bin/splunk --version').and_return('Splunk Universal Forwarder 7.0.2 (build 03bbabbd5c0f)')
+    expect(Facter.fact(:splunkforwarder_version).value).to eq('7.0.2')
+  end
+
+  it 'returns nil' do
+    allow(File).to receive(:exists?).with('C:\Program Files\SplunkUniveralForwarder\bin\splunk.exe').and_return(false)
+    allow(File).to receive(:exists?).with('/opt/splunkforwarder/bin/splunk').and_return(false)
+    expect(Facter.fact(:splunkforwarder_version).value).to be_nil
+  end
+end