[agent6] fix beta downgrade on latest

lib/facter/beta_repo.rb

@@ -0,0 +1,5 @@
+Facter.add('apt_agent6_beta_repo') do
+  setcode do
+    File.exist? '/etc/apt/sources.list.d/datadog-beta.list'
+  end
+end

manifests/ubuntu.pp

@@ -32,15 +32,37 @@
     }
   }
 
-  file { '/etc/apt/sources.list.d/datadog-beta.list':
-    ensure => absent,
+  # This is a hack - I'm not happy about it, but we should rarely
+  # hit this code path
+  #
+  # Also, using $::apt_agent6_beta_repo to access fact instead of
+  # $facts hash - for compatibility with puppet3.x default behavior
+  if $::apt_agent6_beta_repo and $agent_version == 'latest' {
+    exec { 'datadog_apt-get_remove_agent6':
+      command     => '/usr/bin/apt-get remove -y -q datadog-agent',
+    }
+  } else {
+    exec { 'datadog_apt-get_remove_agent6':
+      command     => ':',  # NOOP builtin
+      noop        => true,
+      refreshonly => true,
+      provider    => 'shell',
+    }
+  }
+
+  if $::apt_agent6_beta_repo {
+    file { '/etc/apt/sources.list.d/datadog-beta.list':
+      ensure => absent,
+    }
   }
 
   file { '/etc/apt/sources.list.d/datadog.list':
+    ensure  => file,
     owner   => 'root',
     group   => 'root',
     content => template('datadog_agent/datadog.list.erb'),
-    notify  => Exec['datadog_apt-get_update'],
+    notify  => [Exec['datadog_apt-get_remove_agent6'],
+                Exec['datadog_apt-get_update']],
     require => Package['apt-transport-https'],
   }
 
@@ -49,7 +71,7 @@
     refreshonly => true,
     tries       => 2, # https://bugs.launchpad.net/launchpad/+bug/1430011 won't get fixed until 16.04 xenial
     try_sleep   => 30,
-    require     => File['/etc/apt/sources.list.d/datadog-beta.list'],
+    require     => File['/etc/apt/sources.list.d/datadog.list'],
   }
 
   package { 'datadog-agent-base':
@@ -70,5 +92,4 @@
     pattern   => 'dd-agent',
     require   => Package['datadog-agent'],
   }
-
 }

metadata.json

@@ -1,6 +1,6 @@
 {
   "name": "datadog-datadog_agent",
-  "version": "1.12.0-alpha",
+  "version": "1.12.0",
   "author": "James Turnbull (<[email protected]>) and Rob Terhaar (<rob@atlanticdynamic>) for Datadog Inc.",
   "summary": "Install the Datadog monitoring agent and report Puppet runs to Datadog",
   "license": "Apache-2.0",