refactor: simplify and remove inline content

Simplifications: make apt_conf_snippet repeat less code, make code that
generates sources.list more concise.

Remove all inline content in favor of templates and static files.
The ability to include sources for static files was needed for
the main 'preferences' file, so it was added to the preferences_snippet
define.

Signed-off-by: Gabriel Filion <lelutin@gmail.com>

files/preferences

@@ -5,3 +5,4 @@ Pin-Priority: 1
 Package: *
 Pin: release a=testing
 Pin-Priority: 2
+

files/preferences_snippet.erb

@@ -0,0 +1,4 @@
+Package: <%= name %>
+Pin: release a=<%= release %>
+Pin-Priority: <%= priority %>
+

manifests/apt_conf_snippet.pp

@@ -10,20 +10,20 @@ define apt::apt_conf_snippet(
     fail("Only one of \$source or \$content must specified for apt_conf_snippet ${name}")
   }
 
-  if $source {
   file { "/etc/apt/apt.conf.d/${name}":
     ensure => $ensure,
-      source => $source,
     notify => Exec["refresh_apt"],
     owner => root, group => 0, mode => 0600;
   }
+
+  if $source {
+    File["/etc/apt/apt.conf.d/${name}"] {
+      source => $source,
+    }
   }
   else {
-    file { "/etc/apt/apt.conf.d/${name}":
-      ensure => $ensure,
+    File["/etc/apt/apt.conf.d/${name}"] {
       content => $content,
-      notify => Exec["refresh_apt"],
-      owner => root, group => 0, mode => 0600;
     }
   }
 }

manifests/init.pp

@@ -19,24 +19,17 @@ class apt {
   }
 
   include lsb
-  case $custom_sources_list {
-    '': {
   config_file {
     # include main, security and backports
     # additional sources should be included via the custom_sources_template
     # define
     "/etc/apt/sources.list":
-          content => template( "apt/$operatingsystem/sources.list.erb"),
+      content => $custom_sources_list ? {
+        '' => template( "apt/$operatingsystem/sources.list.erb"),
+        default => $custom_sources_list
+      },
       require => Package['lsb'];
   }
-    }
-    default: {
-      config_file { "/etc/apt/sources.list":
-        content => $custom_sources_list,
-        require => Package['lsb'];
-      }
-    }
-  }
 
   # 01autoremove already present by default
   apt_conf_snippet{ "02show_upgraded":

manifests/preferences.pp

@@ -4,18 +4,9 @@ class apt::preferences {
   $apt_preferences_dir = "${common::moduledir::module_dir_path}/apt/preferences"
   module_dir{'apt/preferences': }
   file{"${apt_preferences_dir}_header":
-    content => $custom_preferences ? {
-      '' => 'Package: *
-Pin: release a=unstable
-Pin-Priority: 1
-
-Package: *
-Pin: release a=testing
-Pin-Priority: 2
-
-',
-      default => $custom_preferences
-    },
+    source => ["puppet:///modules/site-apt/${fqdn}/preferences",
+               "puppet:///modules/site-apt/preferences",
+               "puppet:///modules/apt/preferences"]
   }
 
   concatenated_file{'/etc/apt/preferences':

manifests/preferences_snippet.pp

@@ -1,17 +1,29 @@
 define apt::preferences_snippet(
   $ensure = 'present',
+  $source = '',
   $release,
   $priority
 ){
   include apt::preferences
+
   file { "${apt::preferences::apt_preferences_dir}/${name}":
     ensure => $ensure,
-    content => "Package: ${name}
-Pin: release a=${release}
-Pin-Priority: ${priority}
-
-",
+    #TODO this template is somewhat limited
     notify => Exec["concat_${apt::preferences::apt_preferences_dir}"],
     owner => root, group => 0, mode => 0600;
   }
+
+  # This should really work in the same manner as sources_list and apt_conf
+  # snippets, but since the preferences.d directory cannot be used in Debian
+  # lenny, we can't generalize without going into ugly special-casing.
+  case $source {
+    '' =>
+      File["${apt::preferences::apt_preferences_dir/${name}"] {
+        content => template("apt/preferences_snippet.erb")
+      },
+    default =>
+      File["${apt::preferences::apt_preferences_dir/${name}"] {
+        source => $source
+      }
+  }
 }