packer-template.json

{
    "variables": {
        "vm_size": "Standard_DS13_v2",
    },
    "builders": [
        {
            "name": "azure-arm",
            "type": "azure-arm",
            "client_id": "{{user `client_id`}}",
            "client_secret": "{{user `client_secret`}}",
            "subscription_id": "{{user `subscription_id`}}",
            "object_id": "{{user `object_id`}}",
            "vm_size": "{{user `vm_size`}}",
            "build_resource_group_name": "{{user `resource_group`}}",
            "managed_image_resource_group_name": "{{user `resource_group`}}",
            "managed_image_name": "{{user `managed_image_name`}}",
            "custom_managed_image_name": "{{user `custom_managed_image_name`}}",
            "custom_managed_image_resource_group_name": "{{user `custom_managed_image_resource_group`}}",
            "managed_image_zone_resilient": true,
            "os_type": "Windows",
            "communicator": "winrm",
            "winrm_use_ssl": "true",
            "winrm_insecure": "true",
            "winrm_timeout": "20m",
            "winrm_username": "packer",
            "async_resourcegroup_delete": "true"
        }
    ],
    "provisioners": [
        {
            "type": "powershell",
            "scripts": [
                "{{ template_dir }}/Install-Chocolatey.ps1"
            ]
        },
        {
            "type": "windows-restart",
            "restart_timeout": "30m"
        },
        {
            "type": "powershell",
            "inline": [
                "if( Test-Path $Env:SystemRoot\\windows\\system32\\Sysprep\\unattend.xml ){ rm $Env:SystemRoot\\windows\\system32\\Sysprep\\unattend.xml -Force}",
                "& $env:SystemRoot\\System32\\Sysprep\\Sysprep.exe /oobe /generalize /quiet /quit",
                "while($true) { $imageState = Get-ItemProperty HKLM:\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State | Select ImageState; if($imageState.ImageState -ne 'IMAGE_STATE_GENERALIZE_RESEAL_TO_OOBE') { Write-Output $imageState.ImageState; Start-Sleep -s 10  } else { break } }"
            ]
        }
    ]
}