Properly implement default values

defaults/main.yml

@@ -14,12 +14,12 @@ shorewall6_startup: "{{ shorewall_startup }}"
 
 shorewall_interfaces:
   - zone: net
-    interface: "{{ ansible_default_ipv4.interface|default('eth0') }}"
+    interface: "{{ ansible_default_ipv4.get('interface', 'eth0') }}"
     options: "tcpflags,logmartians,routefilter,sourceroute=0"
 
 shorewall6_interfaces:
   - zone: net
-    interface: "{{ ansible_default_ipv6.interface|default('eth0') }}"
+    interface: "{{ ansible_default_ipv6.get('interface', 'eth0') }}"
     options: "tcpflags,nosmurfs,sourceroute=0"
 
 shorewall_masq: []

tasks/shorewall.yml

@@ -23,7 +23,7 @@
 
   - name: Convert Shorewall version var
     set_fact:
-      shorewall_version: "{{ '.'.join( (shorewall_version_result.stdout.split('.') | default([0,0]))[:2] ) }}"
+      shorewall_version: "{{ '.'.join( shorewall_version_result.get('stdout', '0.0').split('.')[:2] ) }}"
 
   - name: Generate Shorewall configuration files
     template:

tasks/shorewall6.yml

@@ -23,7 +23,7 @@
 
   - name: Convert Shorewall6 version var
     set_fact:
-      shorewall6_version: "{{ '.'.join( (shorewall6_version_result.stdout.split('.') | default([0,0]))[:2] ) }}"
+      shorewall6_version: "{{ '.'.join( shorewall6_version_result.get('stdout', '0.0').split('.')[:2] ) }}"
 
   - name: Generate Shorewall6 configuration files
     template: