Functions/Export-AHPolicyDefinition.ps1
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<# .Synopsis Exports an Azure Policy definition .DESCRIPTION Exports an Azure Policy definition .EXAMPLE Export-AHPolicyDefinition -PolicyDefinitionId '/subscriptions/11111111-1111-1111-1111-111111111111/providers/Microsoft.Authorization/policyDefinitions/george' | out-file .\MyPolicyNamedGeorge.json This example outputs george to a file .EXAMPLE Export-AHPolicyDefinition -PolicyDefinitionId '/subscriptions/11111111-1111-1111-1111-111111111111/providers/Microsoft.Authorization/policyDefinitions/george' This example just shows me what george would look like on the screen .NOTES I did not write Import-AHPolicyDefinition because you can just use the cmdlet New-AzPolicyDefinition that Microsoft wrote. The whole point of writing this export is so that the output is compatible with that cmdlet. I can then later import george into another tenant but maybe I want my policy to be named as frank there so I use the following New-AzPolicyDefinition -Name frank -DisplayName frank -Description frank -Policy .\MyPolicyNamedGeorge .PARAMETER PolicyDefinitionId The Policy definition Id to export #> function Export-AHPolicyDefinition { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [string] [ValidateScript({ $result = Get-AzPolicyDefinition -id $_ If ($result.GetType().Name -eq 'PsPolicyDefinition' -or $result.GetType().BaseType.Name -eq 'Object') { $true }Else { $false } })] $PolicyDefinitionId ) begin { If ($PSVersionTable.PSVersion.Major -lt 7) { throw 'This cmdlet requires PowerShell 7 or greater' } } process { $original = Get-AzPolicyDefinition -id $PolicyDefinitionId $fixed = [pscustomobject]@{} $exclusions = @('ResourceId', 'ResourceName', 'ResourceType', 'SubscriptionId', 'Properties', 'PolicyDefinitionId') $properties = ($original | Get-Member -MemberType Properties).Name | Where-Object { $_ -notin $exclusions } Copy-Property -SourceObject $original -InputObject $fixed -Property $properties -ForceLowercaseKeys #add in type $fixed | Add-Member -NotePropertyName 'type' -NotePropertyValue 'Microsoft.Authorization/policyDefinitions' #still need to change PolicyRule to policyRule #copy all elements of _.Properties except PolicyRule $tempProperties = [pscustomobject]@{} $properties = ($original.Properties | Get-Member -MemberType Properties).Name | Where-Object { $_ -ne 'PolicyRule' } Copy-Property -SourceObject $($original.Properties) -InputObject $tempProperties -Property $properties -ForceLowercaseKeys #-Verbose #add back in policyRule with the corrected capitalization $tempProperties | Add-Member -NotePropertyName 'policyRule' -NotePropertyValue $original.Properties.PolicyRule #add Properties back onto the main object $fixed | Add-Member -NotePropertyName 'properties' -NotePropertyValue $tempProperties #add back in id instead of PolicyDefinitionId $fixed | Add-Member -NotePropertyName 'id' -NotePropertyValue $original.PolicyDefinitionId $fixed | ConvertTo-Json -Depth 99 } end { } } |