PreDeploy.ps1

Import-Module WebAdministration

if ($OctopusParameters -eq $null)
{
	$OctopusParameters = @{
		OctopusWebSiteName = "Default Web Site\SiteName"
		ApplicationPoolName = "AppPoolName"
		UseCustomAppPoolUser = false
	};
}

$applicationPoolName = $OctopusParameters["ApplicationPoolName"]
$appPoolPath = "IIS:\AppPools\$applicationPoolName"

if (!(Test-Path $appPoolPath))
{
	New-WebAppPool -Name $applicationPoolName 
}
else
{
	Write-Host "Application pool '$applicationPoolName' exists."
}

Set-ItemProperty -Path $appPoolPath -Name "managedRuntimeVersion" -Value "v4.0"
if ($OctopusParameters["UseCustomAppPoolUser"] -eq $true)
{
	Set-ItemProperty -Path $appPoolPath -Name "processmodel.identityType" -Value "3"
	Set-ItemProperty -Path $appPoolPath -Name "processmodel.username" -Value $OctopusParameters["ApplicationPoolUsername"]
	Set-ItemProperty -Path $appPoolPath -Name "processmodel.password" -Value $OctopusParameters["ApplicationPoolPassword"]
}
Set-ItemProperty -Path $appPoolPath -Name "autoStart" -Value "true"
Set-ItemProperty -Path $appPoolPath -Name processModel.idleTimeOut -value ([TimeSpan]::FromMinutes(0))

$websiteName = $OctopusParameters["OctopusWebSiteName"]
$sitePath = "IIS:\Sites\$websiteName"

if (!(Get-Item $sitePath -ErrorAction SilentlyContinue)) {
    Write-Host "Application does not exist, creating"
    New-Item $sitePath -PhysicalPath $(Resolve-Path .) -Type Application
} else {
    Write-Host "Application exists. Complete"
}
Set-ItemProperty -Path "$sitePath" -Name "ApplicationPool" -Value "$applicationPoolName" 

Set-WebConfigurationProperty `
	-Filter /system.WebServer/security/authentication/windowsAuthentication `
	-Name enabled `
	-Value $true `
	-Location "$websiteName"