All changes referenced in PRs #8767 , #8768 , #8769 :

This changes the get-attr function slightly, and lets the module specify whether a param is needed and auto-fails if it is not present. A module can now verify params like so::
 $params = Parse-Args $args;
 $result = New-Object psobject;
 Set-Attr $result "changed" $false;
 $path = Get-Attr -obj $params -name path -failifempty $true -resultobj $result

or

$params = Parse-Args $args;
 $result = New-Object psobject;
 Set-Attr $result "changed" $false;
 $path = Get-Attr -obj $params -name path -failifempty $true -emptyattributefailmessage "Oh man. You forgot the main part!" -resultobj $result

slight tweak in how the powershell module converts to json in order to support nested objects (allows for more complex facts, among others)

This script gathers some extended facts on windows hosts in a json array attribute called "ansible_interfaces". This info is needed for some network-related modules I'm working on. Required the update to powershell.ps1 to return deeply nested json objects.

lib/ansible/module_utils/powershell.ps1

@@ -1,4 +1,3 @@
-
 # This particular file snippet, and this file snippet only, is BSD licensed.
 # Modules you write using this snippet, which is embedded dynamically by Ansible
 # still belong to the author of the module, and may assign their own license
@@ -55,25 +54,6 @@ Function Set-Attr($obj, $name, $value)
     $obj | Add-Member -Force -MemberType NoteProperty -Name $name -Value $value
 }
 
-# Helper function to get an "attribute" from a psobject instance in powershell.
-# This is a convenience to make getting Members from an object easier and
-# slightly more pythonic
-# Example: $attr = Get-Attr $response "code" -default "1"
-Function Get-Attr($obj, $name, $default = $null)
-{
-    # Check if the provided Member $name exists in $obj and return it or the
-    # default
-    If ($obj.$name.GetType)
-    {
-        $obj.$name
-    }
-    Else
-    {
-        $default
-    }
-    return
-}
-
 # Helper function to convert a powershell object to JSON to echo it, exiting
 # the script
 # Example: Exit-Json $result
@@ -85,7 +65,7 @@ Function Exit-Json($obj)
         $obj = New-Object psobject
     }
 
-    echo $obj | ConvertTo-Json
+    echo $obj | ConvertTo-Json -Depth 99
     Exit
 }
 
@@ -109,10 +89,35 @@ Function Fail-Json($obj, $message = $null)
 
     Set-Attr $obj "msg" $message
     Set-Attr $obj "failed" $true
-    echo $obj | ConvertTo-Json
+    echo $obj | ConvertTo-Json -Depth 99
     Exit 1
 }
 
+# Helper function to get an "attribute" from a psobject instance in powershell.
+# This is a convenience to make getting Members from an object easier and
+# slightly more pythonic
+# Example: $attr = Get-Attr $response "code" -default "1"
+#Note that if you use the failifempty option, you do need to specify resultobject as well.
+Function Get-Attr($obj, $name, $default = $null,$resultobj, $failifempty=$false, $emptyattributefailmessage)
+{
+    # Check if the provided Member $name exists in $obj and return it or the
+    # default
+    If ($obj.$name.GetType)
+    {
+        $obj.$name
+    }
+    Elseif($failifempty -eq $false)
+    {
+        $default
+    }
+    else
+    {
+        if (!$emptyattributefailmessage) {$emptyattributefailmessage = "Missing required argument: $name"}
+        Fail-Json -obj $resultobj -message $emptyattributefailmessage
+    }
+    return
+}
+
 # Helper filter/pipeline function to convert a value to boolean following current
 # Ansible practices
 # Example: $is_true = "true" | ConvertTo-Bool
@@ -136,3 +141,4 @@ Function ConvertTo-Bool
     }
     return
 }
+

library/windows/setup.ps1

@@ -32,6 +32,27 @@ $capacity = 0
 $memory | foreach {$capacity += $_.Capacity}
 $netcfg = Get-WmiObject win32_NetworkAdapterConfiguration
 
+$ActiveNetcfg = @(); $ActiveNetcfg+= $netcfg | where {$_.ipaddress -ne $null}
+$formattednetcfg = @()
+foreach ($adapter in $ActiveNetcfg)
+{
+    $thisadapter = New-Object psobject @{
+    interface_name = $adapter.description
+    dns_domain = $adapter.dnsdomain
+    default_gateway = $null
+    interface_index = $adapter.InterfaceIndex
+    }
+    
+    if ($adapter.defaultIPGateway)
+    {
+        $thisadapter.default_gateway = $adapter.DefaultIPGateway[0].ToString()
+    }
+    
+    $formattednetcfg += $thisadapter;$thisadapter = $null
+}
+
+Set-Attr $result.ansible_facts "ansible_interfaces" $formattednetcfg
+
 Set-Attr $result.ansible_facts "ansible_hostname" $env:COMPUTERNAME;
 Set-Attr $result.ansible_facts "ansible_fqdn" "$([System.Net.Dns]::GetHostByName((hostname)).HostName)"
 Set-Attr $result.ansible_facts "ansible_system" $osversion.Platform.ToString()