Update examples for modern ansible and state that duplicating parameters causes an error.

language_features/complex_args.yml

@@ -2,23 +2,26 @@
 
 # this is a bit of an advanced topic.
 #
-# generally Ansible likes to pass simple key=value arguments to modules.  It occasionally comes up though
+# generally Ansible likes to pass simple key=value arguments to modules.  It
-# that you might want to write a module that takes COMPLEX arguments, like lists and dictionaries.
+# occasionally comes up though that you might want to write a module that takes
+# COMPLEX arguments, like lists and dictionaries.
 #
-# happen, at least right now, it should be a Python module, so it can leverage some common code in Ansible that
+# In order for this to happen, at least right now, it should be a Python
-# makes this easy.  If you write a non-Python module, you can still pass data across, but only hashes that
+# module, so it can leverage some common code in Ansible that makes this easy.
-# do not contain lists or other hashes.  If you write the Python module, you can do anything.
+# If you write a non-Python module, you can still pass data across, but only
+# hashes that do not contain lists or other hashes.  If you write the Python
+# module, you can do anything.
 #
-# note that if you were to use BOTH the key=value form and the 'args' form for passing data in, the key=value
+# note that if you were to use BOTH the key=value form and the 'args' form for
-# parameters take a higher priority, so you can use them for defaults, which can be useful.
+# passing data in, the behaviour is currently undefined.  Ansible is working to
+# standardize on returning a duplicate parameter failure in this case but
+# modules which don't use the common module framework may do something
+# different.
 
-- hosts: all
+- hosts: localhost
-  user: root
   gather_facts: no
 
   vars:
-    defaults:
-      state: stopped
     complex:
       ghostbusters: [ 'egon', 'ray', 'peter', 'winston' ]
       mice: [ 'pinky', 'brain', 'larry' ]
@@ -32,16 +35,11 @@
       ping: data='Hi Mom'
 
     - name: but what if you have a complex module that needs complicated data?
-      action: ping
+      ping:
-      args:
+        data:
-         data: 
+          moo: cow
-           moo: cow
+          asdf: [1,2,3,4]
-           asdf: [1,2,3,4]
 
     - name: can we make that cleaner? sure!
-      action: ping
+      ping:
-      args: { data: "{{ complex }}" }
+        data: "{{ complex }}"
-
-    - name: here is an example of how it works with defaults, notice the key=value format wins
-      action: service name=httpd state=running
-      args: defaults