Autodetect supported instead of using Hiera

Previously it (ab)used Hiera to set the supported versions. This now
uses metadata.json and facts to do the same. The parameter is kept in to
override this. It is turned into undef to allow pick() and signal that
the value is determined later.

data/RedHat.CentOS.6.yaml

@@ -1,4 +1,3 @@
 ---
 
 openvmtools::manage_epel: true
-openvmtools::supported: true

data/RedHat.OracleLinux.6.yaml

@@ -1,4 +1,3 @@
 ---
 
 openvmtools::manage_epel: true
-openvmtools::supported: true

data/RedHat.RedHat.6.yaml

@@ -1,4 +1,3 @@
 ---
 
 openvmtools::manage_epel: true
-openvmtools::supported: true

functions/supported.pp

@@ -0,0 +1,19 @@
+# @summary Returns whether the currently loaded OS is supported by the module
+#
+# This function uses the current facts to check if the current Operating System
+# and its release or major release is supported.
+#
+# @param mod
+#  The module name to check.
+#
+# @example Using the Puppet built in global $module_name
+#   openvmtools::supported($module_name)
+function openvmtools::supported(String[1] $mod) >> Boolean {
+  $metadata = load_module_metadata($mod)
+  unless $metadata {
+    fail("Unable to load metadata for mod '${mod}'")
+  }
+  $metadata['operatingsystem_support'].any |$os| {
+    $os['operatingsystem'] == $facts['os']['name'] and $facts['os']['release']['major'] in $os['operatingsystemrelease']
+  }
+}

manifests/init.pp

@@ -96,12 +96,12 @@
   Boolean                             $service_hasstatus         = true,
   Variant[String[1],Array[String[1]]] $service_name              = ['vgauthd', 'vmtoolsd'],
   Optional[String[1]]                 $service_pattern           = undef,
-  Boolean                             $supported                 = false,
+  Optional[Boolean]                   $supported                 = undef,
   Boolean                             $uninstall_vmware_tools    = false,
   Boolean                             $with_desktop              = false,
 ) {
   if $facts['virtual'] == 'vmware' {
-    if $supported {
+    if pick($supported, openvmtools::supported($module_name)) {
       if $ensure == 'present' {
         $package_ensure = $autoupgrade ? {
           true    => 'latest',

spec/functions/supported_spec.rb

@@ -0,0 +1,16 @@
+require 'spec_helper'
+
+describe 'openvmtools::supported' do
+  context 'On Debian 10' do
+    let(:facts) do
+      {
+        operatingsystem: 'Debian',
+        operatingsystemmajrelease: '10',
+      }
+    end
+
+    it 'returns true' do
+      is_expected.to run.with_params('openvmtools').and_return(true)
+    end
+  end
+end