added refreshonly support

Author: Omer Levi Hevroni

README.md

@@ -238,6 +238,8 @@ You can trigger a rebuild of the image by subscribing to external events like Do
 docker::image { 'ubuntu':
   docker_file => '/tmp/Dockerfile'
   subscribe => File['/tmp/Dockerfile'],
+  ensure => 'latest',
+  refreshonly => 'true'
 }
 
 file { '/tmp/Dockerfile':

manifests/image.pp

@@ -32,6 +32,7 @@
   $docker_file  = undef,
   $docker_dir   = undef,
   $docker_tar   = undef,
+  $refreshonly = false
 ) {
   include docker::params
   $docker_command = $docker::params::docker_command
@@ -117,6 +118,7 @@
       timeout     => 0,
       onlyif      => $image_install,
       require     => File['/usr/local/bin/update_docker_image.sh'],
+      refreshonly => $refreshonly
     }
   } elsif $ensure == 'present' {
     exec { $image_install:
@@ -125,7 +127,7 @@
       path        => ['/bin', '/usr/bin'],
       timeout     => 0,
       returns     => ['0', '2'],
-      require     => File['/usr/local/bin/update_docker_image.sh'],
+      require     => File['/usr/local/bin/update_docker_image.sh']
     }
   }
 

spec/defines/image_spec.rb

@@ -32,6 +32,7 @@
     it { should contain_exec('/usr/local/bin/update_docker_image.sh base') }
   end
 
+
   context 'with docker_file => Dockerfile' do
     let(:params) { { 'docker_file' => 'Dockerfile' }}
     it { should contain_exec('docker build -t base - < Dockerfile') }
@@ -138,7 +139,16 @@
 
   context 'with ensure => latest' do
     let(:params) { { 'ensure' => 'latest' } }
-    it { should contain_exec("echo 'Update of base complete'").with_onlyif('/usr/local/bin/update_docker_image.sh base') }
+    it { should contain_exec("echo 'Update of base complete'").with_onlyif('/usr/local/bin/update_docker_image.sh base').with(
+      'refreshonly' => 'false'
+    ) } 
+  end
+
+  context 'with ensure => latest and refreshonly = true' do
+    let(:params) { { 'ensure' => 'latest', 'refreshonly' => 'true' } }
+    it { should contain_exec("echo 'Update of base complete'").with_onlyif('/usr/local/bin/update_docker_image.sh base').with(
+      'refreshonly' => 'true'
+    ) }
   end
 
   context 'with ensure => latest and image_tag => precise' do