The Packer file of Despair

{
  "variables": {
    "build_version": "1",
    "buildkite-agent": null,
    "client_id": "{{env `ARM_CLIENT_ID`}}",
    "location": "{{env `ARM_DEFAULT_LOCATION`}}",
    "client_secret": "{{env `ARM_CLIENT_SECRET`}}",
    "tenant_id": "{{env `ARM_TENANT_ID`}}",
    "subscription_id": "{{env `ARM_SUBSCRIPTION_ID`}}",
    "managed_image_prefix": "buildkite_window_10_disk_{{timestamp}}",
    "package_location": "",
    "working_directory": "",
    "ci-studio-common": null,
    "habitat": null,
    "winrm_username": "Administrator"
  },
  "builders": [
    {
      "type": "azure-arm",
      "client_id": "<Hi>",
      "client_secret": "<shhhh, it's a secret>",
      "tenant_id": "<nunya>",
      "subscription_id": "<something-something that Azure understands goes here.>",
      "managed_image_name": "buildkite-windows-10",
      "managed_image_resource_group_name": "EDM_Master_Storage_Resource_Group",
      "os_type": "Windows",
      "image_publisher": "MicrosoftWindowsDesktop",
      "image_offer": "windows-10",
      "image_sku": "19h2-ent",
      "image_version": "latest",
      "communicator": "winrm",
      "winrm_username": "Administrator",
      "winrm_use_ssl": true,
      "winrm_insecure": true,
      "winrm_timeout": "3m",
      "azure_tags": {
        "CreatedOn": "01-26-2020",
        "Createdby": "name"
      },
      "location": "West US 2",
      "vm_size": "Standard_B4ms"
    }
  ],
  "provisioners": [
    {
      "type": "file",
      "source": "conf",
      "destination": "C:/packer-temp"
    },
    {
      "type": "powershell",
      "script": "scripts/install-utils.ps1"
    },
    {
      "type": "powershell",
      "script": "scripts/update-users.ps1"
    },
    {
      "type": "powershell",
      "script": "scripts/install-buildkite-agent.ps1",
      "environment_vars": [
        "BUILDKITE_AGENT_VERSION={{ user `buildkite-agent` }}"
      ]
    },
    {
      "type": "powershell",
      "script": "scripts/install-buildkite-plugins.ps1",
      "environment_vars": [
        "DOCKER_LOGIN_BUILDKITE_PLUGIN_VERSION = {{ user `docker-login-buildkite-plugin` }}",
        "ECR_BUILDKITE_PLUGIN_VERSION = {{ user `ecr-buildkite-plugin` }}"
      ]
    },
    {
      "type": "file",
      "source": "scripts/buildkite-agent.cfg",
      "destination": "c:/buildkite-agent/buildkite-agent.cfg"
    },
    {
      "type": "powershell",
      "script": "scripts/install-ci-studio-common.ps1",
      "environment_vars": [
        "CI_STUDIO_COMMON_VERSION={{ user `ci-studio-common` }}"
      ]
    },
    {
      "type": "powershell",
      "script": "scripts/install-habitat.ps1",
      "environment_vars": [
        "HABITAT_VERSION={{ user `habitat` }}"
      ]
    },
    {
      "type": "powershell",
      "script": "scripts/install-hooks.ps1"
    },
    {
      "type": "powershell",
      "inline": [
        "Remove-Item -Path C:/packer-temp -Recurse"
      ]
    },
    {
      "type": "powershell",
      "script": "scripts/configure-buildkite.ps1"
    },
    {
      "type": "powershell",
      "inline": [
        "Choco install chef-workstation -y",
        "Choco install ruby -y"
      ]
    },
    {
      "type": "powershell",
      "inline": [
        "Choco install msys2 -y"
      ]
    },
    {
      "type": "powershell",
      "script": "scripts/update-path.ps1"
    },
    {
      "type": "powershell",
      "script": "scripts/install-bundler.ps1"
    },
    {
      "type": "powershell",
      "inline": [
        " # NOTE: the following *3* lines are only needed if the you have installed the Guest Agent.",
        "  while ((Get-Service RdAgent).Status -ne 'Running') { Start-Sleep -s 5 }",
        "  while ((Get-Service WindowsAzureTelemetryService).Status -ne 'Running') { Start-Sleep -s 5 }",
        "  while ((Get-Service WindowsAzureGuestAgent).Status -ne 'Running') { Start-Sleep -s 5 }",
        "  & C:\\\\Windows\\\\System32\\\\Sysprep\\\\Sysprep.exe /oobe /generalize /quiet /quit /mode:vm",
        "  while(True) {  = Get-ItemProperty HKLM:\\\\SOFTWARE\\\\Microsoft\\\\Windows\\\\CurrentVersion\\\\Setup\\\\State | Select ImageState; if(.ImageState -ne 'IMAGE_STATE_GENERALIZE_RESEAL_TO_OOBE') { Write-Output .ImageState; Start-Sleep -s 10  } else { break } }"
      ]
    }
  ]
}