Handle potentially missing attributes for (currently) un-supported platforms

README.md

@@ -243,7 +243,7 @@ default["postgresql"]["cfg_update_action"]               = :restart
 #----------------------------------------------------------------------------
 # APT REPOSITORY
 #----------------------------------------------------------------------------
-default["postgresql"]["apt_distribution"]                = node["lsb"]["codename"]
+default["postgresql"]["apt_distribution"]                = node["lsb"] && node["lsb"]["codename"]
 default["postgresql"]["apt_repository"]                  = "apt.postgresql.org"
 default["postgresql"]["apt_uri"]                         = "http://apt.postgresql.org/pub/repos/apt"
 default["postgresql"]["apt_components"]                  = ["main"]

attributes/default.rb

@@ -20,7 +20,7 @@
 # APT REPOSITORY
 #------------------------------------------------------------------------------
 
-default["postgresql"]["apt_distribution"] = node["lsb"]["codename"]
+default["postgresql"]["apt_distribution"] = node["lsb"] && node["lsb"]["codename"]
 default["postgresql"]["apt_repository"]   = "apt.postgresql.org"
 default["postgresql"]["apt_uri"]          = "http://apt.postgresql.org/pub/repos/apt"
 default["postgresql"]["apt_components"]   = ["main", node["postgresql"]["version"]]

recipes/debian_backports.rb

@@ -4,21 +4,21 @@
 #
 
 # backports for initial support
-backports_uri = if node["lsb"]["codename"] == "wheezy"
+backports_uri = if node["lsb"] && node["lsb"]["codename"] == "wheezy"
                   "http://cdn.debian.net/debian"
                 else
                   "http://backports.debian.org/debian-backports"
                 end
 
 apt_repository "debian-backports" do
   uri backports_uri
-  distribution "#{node["lsb"]["codename"]}-backports"
+  distribution "#{node["lsb"] && node["lsb"]["codename"]}-backports"
   components ["main"]
 end
 
 # backports support for debian
 %w[libpq5 postgresql-common].each do |pkg|
   package pkg do
-    options "-t #{node["lsb"]["codename"]}-backports"
+    options "-t #{node["lsb"] && node["lsb"]["codename"]}-backports"
   end
 end