win_feature: Clean up and check-mode support (#21351)

* Clean up parameter handling and added check-mode support

Changes include:
- Remove trailing semi-colons
- Replaced PSObjects into normal hashes
- Make use of Get-AnsibleParam and types
- Added check-mode support

* Implemented -WhatIf:$check_mode support

* powershell.ps1: Ensure Fail-Json() works with Hashtables

Without this change a dictionary $result object would be emptied if it
is anything but a PSCustomObject. Now we also support Hashtables.

* Revert to original formatting

lib/ansible/modules/windows/win_feature.ps1

@@ -19,28 +19,24 @@
 # WANT_JSON
 # POWERSHELL_COMMON
 
-Import-Module Servermanager;
+Import-Module Servermanager
 
-$params = Parse-Args $args;
-
-$result = New-Object PSObject -Property @{
+$result = @{
     changed = $false
 }
 
-$name = Get-Attr $params "name" -failifempty $true
+$params = Parse-Args $args -supports_check_mode $true
+$check_mode = Get-AnsibleParam -obj $params -name "_ansible_check_mode" -type "bool" -default $false
+
+$name = Get-AnsibleParam -obj $params -name "name" -type "str" -failifempty $true
+$state = Get-AnsibleParam -obj $params -name "state" -type "str" -default "present" -validateset "present","absent"
+$restart = Get-AnsibleParam -obj $params -name "restart" -type "bool" -default $false
+$includesubfeatures = Get-AnsibleParam -obj $params -name "include_sub_features" -type "bool" -default $false
+$includemanagementtools = Get-AnsibleParam -obj $params -name "include_management_tools" -type "bool" -default $false
+$source = Get-AnsibleParam -obj $params -name "source" -type "str"
 
 $name = $name -split ',' | % { $_.Trim() }
 
-$state = Get-Attr $params "state" "present"
-$state = $state.ToString().ToLower()
-If (($state -ne 'present') -and ($state -ne 'absent')) {
-    Fail-Json $result "state is '$state'; must be 'present' or 'absent'"
-}
-
-$restart = Get-Attr $params "restart" $false | ConvertTo-Bool
-$includesubfeatures = Get-Attr $params "include_sub_features" $false | ConvertTo-Bool
-$includemanagementtools = Get-Attr $params "include_management_tools" $false | ConvertTo-Bool
-$source = Get-Attr $params "source" $false
 
 # Determine which cmdlets we need to work with. Then we can set options appropriate for the cmdlet
 $installWF= $false
@@ -71,17 +67,18 @@ If ($state -eq "present") {
 
     # Base params to cover both Add/Install-WindowsFeature
     $InstallParams = @{
-        "Name"=$name;
-        "Restart"=$Restart;
-        "IncludeAllSubFeature"=$includesubfeatures;
-        "ErrorAction"="SilentlyContinue"
+        Name = $name
+        Restart = $restart
+        IncludeAllSubFeature = $includesubfeatures
+        ErrorAction = "SilentlyContinue"
+        WhatIf = $check_mode
     }
 
     # IncludeManagementTools and source are options only for Install-WindowsFeature
     if ($installWF) {
 
         if ($source) {
-            if (!(test-path $source)) {            
+            if (-not (Test-Path -Path $source)) {
                 Fail-Json $result "Failed to find source path $source"
             }
 
@@ -103,9 +100,10 @@ If ($state -eq "present") {
 ElseIf ($state -eq "absent") {
 
     $UninstallParams = @{
-        "Name"=$name;
-        "Restart"=$Restart;        
-        "ErrorAction"="SilentlyContinue"
+        Name = $name
+        Restart = $restart
+        ErrorAction = "SilentlyContinue"
+        WhatIf = $check_mode
     }
 
     try {
@@ -125,13 +123,13 @@ If ($featureresult.FeatureResult)
     ForEach ($item in $featureresult.FeatureResult) {
         $message = @()
         ForEach ($msg in $item.Message) {
-            $message += New-Object PSObject -Property @{
+            $message += @{
                 message_type = $msg.MessageType.ToString()
                 error_code = $msg.ErrorCode
                 text = $msg.Text
             }
         }
-        $installed_features += New-Object PSObject -Property @{
+        $installed_features += @{
             id = $item.Id
             display_name = $item.DisplayName
             message = $message
@@ -143,10 +141,10 @@ If ($featureresult.FeatureResult)
     $result.changed = $true
 }
 
-Set-Attr $result "feature_result" $installed_features
-Set-Attr $result "success" ($featureresult.Success.ToString() | ConvertTo-Bool)
-Set-Attr $result "exitcode" $featureresult.ExitCode.ToString()
-Set-Attr $result "restart_needed" ($featureresult.RestartNeeded.ToString() | ConvertTo-Bool)
+$result.feature_result = $installed_features
+$result.success = ($featureresult.Success.ToString() | ConvertTo-Bool)
+$result.exitcode = $featureresult.ExitCode.ToString()
+$result.restart_needed = ($featureresult.RestartNeeded.ToString() | ConvertTo-Bool)
 
 If ($result.success) {
     Exit-Json $result

lib/ansible/modules/windows/win_feature.py

@@ -38,11 +38,9 @@ options:
     description:
       - Names of roles or features to install as a single feature or a comma-separated list of features
     required: true
-    default: null
   state:
     description:
       - State of the features or roles on the system
-    required: false
     choices:
       - present
       - absent
@@ -53,16 +51,12 @@ options:
     choices:
       - yes
       - no
-    default: null
-    required: false
   include_sub_features:
     description:
       - Adds all subfeatures of the specified feature
     choices:
       - yes
       - no
-    default: null
-    required: false
   include_management_tools:
     description:
       - Adds the corresponding management tools to the specified feature.
@@ -70,13 +64,10 @@ options:
     choices:
       - yes
       - no
-    default: null
-    required: false
   source:
     description:
       - Specify a source to install the feature from.
       - Not supported in Windows 2008. If present when using Windows 2008 this option will be ignored.
-    required: false
     choices: [ ' {driveletter}:\sources\sxs', ' {IP}\Share\sources\sxs' ]
     version_added: "2.1"
 author: