add class udev::udevadm to manage udevadm trigger

Author: Joshua Hoblitt

README.md

@@ -32,6 +32,15 @@ Usage
     include udev
 ```
 
+### Manually trigging a udev rules reload
+
+```puppet
+    file { '/etc/etc/udev/rules.d/99-myfrobnicator.rules':
+      ...
+      notify => Class['udev::udevadm'],
+    }
+```
+
 
 Limitations
 -----------

manifests/init.pp

@@ -3,7 +3,11 @@
 # simple template
 #
 class udev inherits udev::params {
+
   package{ $udev::params::udev_package:
     ensure => present,
   }
+
+  class { 'udev::udevadm': } ->
+  Class['udev']
 }

manifests/params.pp

@@ -4,6 +4,7 @@
 #
 class udev::params {
   $udev_package = 'udev'
+  $udevadm_path = '/sbin'
 
   case $::osfamily {
     'redhat': {}

manifests/udevadm.pp

@@ -0,0 +1,25 @@
+# == Class: udev::udevadm
+#
+# This class should not being included into the manifest directly.  It's
+# function is to receive messages that the udev configuration files have
+# changed.
+#
+# === Example
+#
+# file { '/etc/etc/udev/rules.d/99-myfrobnicator.rules':
+#   ...
+#   notify => Class['udev::udevadm'],
+# }
+#
+class udev::udevadm inherits udev::params {
+
+  # adding `udevadm control --reload-rules` may be needed some day for edge
+  # cases.
+  # http://unix.stackexchange.com/questions/39370/how-to-reload-udev-rules-without-reboot
+
+  exec { 'udevadm trigger':
+    command     => 'udevadm trigger',
+    refreshonly => true,
+    path        => [$udev::params::udevadm_path],
+  }
+}

spec/classes/udev_spec.rb

@@ -7,6 +7,7 @@
 
     it { should include_class('udev') }
     it { should contain_package('udev').with_ensure(:present) }
+    it { should contain_class('udev::udevadm') }
   end
 
 end

spec/classes/udevadm_spec.rb

@@ -0,0 +1,18 @@
+require 'spec_helper'
+
+describe 'udev::udevadm', :type => :class do
+
+  describe 'for osfamily RedHat' do
+    let(:facts) {{ :osfamily => 'RedHat' }}
+
+    it { should include_class('udev::udevadm') }
+    it do
+      should contain_exec('udevadm trigger').with({
+        :command     => 'udevadm trigger',
+        :refreshonly => true,
+        :path        => ['/sbin'],
+      })
+    end
+  end
+
+end