Add wal 0.9.3+ parametes to the config only if influxdb version > 0.9.3

spec/classes/config_template_spec.rb

@@ -94,4 +94,30 @@
     it { is_expected.to contain_file('/etc/opt/influxdb/influxdb.conf').with_content(/check-interval = "20m"/) }
   end
 
+  context 'add 0.9.3 specific wal options' do
+    let (:params) {{ :version => '0.9.3' }}
+    let :facts do
+      {
+        :osfamily => 'Debian',
+        :operatingsystem => 'Ubuntu',
+        :operatingsystemrelease => '12.04',
+      }
+    end
+    it { is_expected.to contain_file('/etc/opt/influxdb/influxdb.conf') }
+    it { is_expected.to contain_file('/etc/opt/influxdb/influxdb.conf').with_content(/wal-dir = "\/var\/opt\/influxdb\/wal"/) }
+  end
+
+  context 'without 0.9.3 options if version installed < 0.9.3' do
+    let (:params) {{ :version => '0.9.2' }}
+    let :facts do
+      {
+        :osfamily => 'Debian',
+        :operatingsystem => 'Ubuntu',
+        :operatingsystemrelease => '12.04',
+      }
+    end
+    it { is_expected.to contain_file('/etc/opt/influxdb/influxdb.conf') }
+    it { is_expected.to contain_file('/etc/opt/influxdb/influxdb.conf').without_content(/wal-dir = "\/var\/opt\/influxdb\/wal"/) }
+  end
+
 end

templates/influxdb.conf.erb

@@ -26,15 +26,17 @@ hostname = "<%= @hostname -%>"
 [data]
   dir = "<%= @data_dir -%>"
   max-wal-size = <%= @max_wal_size %>
-  wal-dir = "<%= @wal_dir -%>"
   wal-flush-interval = "<%= @wal_flush_interval -%>"
   wal-partition-flush-delay = "<%= @wal_partition_flush_delay -%>"
+<%- if scope.function_versioncmp([@version, '0.9.3']) >= 0 -%>
+  wal-dir = "<%= @wal_dir -%>"
   wal-enable-logging = <%= @wal_enable_logging %>
   wal-ready-series-size = <%= @wal_ready_series_size %>
   wal-compaction-threshold = <%= @wal_compaction_threshold %>
   wal-max-series-size = <%= @wal_max_series_size %>
   wal-flush-cold-interval = "<%= @wal_flush_cold_interval %>"
   wal-partition-size-threshold = <%= @wal_partition_size_threshold %>
+<% end -%>
 
 [cluster]
   shard-writer-timeout = "<%= @shard_writer_timeout -%>"