PowerShell script used to rebuild the Development and Test environments. From a high-level perspective, the script deletes the IIS website (if it exists), creates a new website (including the corresponding application pool), and then copies the files for the main site as well as the Subtext files for an application.

param(
    [string] $caelumVersion,
    [string] $subtextVersion,
    [string] $buildConfiguration)

$ErrorActionPreference = "Stop"

Import-Module WebAdministration

function RemoveWebsite(
    [string] $siteName = $(Throw "Value cannot be null: siteName"),
    [string] $sitePath = $(Throw "Value cannot be null: sitePath"))
{
    # HACK: Don't use "Get-Website -Name ..."
    # https://connect.microsoft.com/PowerShell/feedback/details/597787/get-website-always-returns-full-list-of-web-sites
    #
    #$site = Get-Website -Name $siteName

    $site = Get-Item ("IIS:\Sites\" + $siteName) -EA 0

    If ($site -ne $null -and $site.Name -eq $siteName)
    {
        Write-Host "Stopping website ($siteName)...`r`n"
        Stop-Website -Name $siteName
        Write-Host "Successfully stopped website ($siteName).`r`n"

        Write-Host "Removing website ($siteName)...`r`n"
        Remove-Website -Name $siteName
        Write-Host "Successfully removed website ($siteName).`r`n"
    }

    If (Test-Path $sitePath)
    {
        Write-Host "Removing website folder ($sitePath)...`r`n"
        Remove-Item $sitePath -Recurse
        Write-Host "Successfully removed website folder ($sitePath).`r`n"
    }

    $appPool = Get-Item ("IIS:\AppPools\" + $siteName) -EA 0

    If ($appPool -ne $null)
    {
        Write-Host "Removing application pool ($siteName)...`r`n"
        Remove-WebAppPool -Name $siteName
        Write-Host "Successfully removed application pool ($siteName).`r`n"
    }
}

function Main(
    [string] $caelumVersion,
    [string] $subtextVersion,
    [string] $buildConfiguration)
{
    If ([string]::IsNullOrEmpty($env:CAELUM_URL) -eq $true)
    {
        Throw "CAELUM_URL environment variable must be set."
    }

    $siteUrl = [System.Uri] $env:CAELUM_URL

    Write-Debug "Absolute URL: $($siteUrl.AbsoluteUri)"

    If (($($siteUrl.AbsoluteUri) -eq "http://www-local.technologytoolbox.com/") `
        -or ($($siteUrl.AbsoluteUri) -eq "http://www-dev.technologytoolbox.com/"))
    {
        If ([string]::IsNullOrEmpty($caelumVersion) -eq $true)
        {
            Write-Host "Defaulting to latest build for Caelum...`r`n"
            $caelumVersion = "_latest"
        }

        If ([string]::IsNullOrEmpty($subtextVersion) -eq $true)
        {
            Write-Host "Defaulting to latest build for Subtext...`r`n"
            $subtextVersion = "_latest"
        }

        If ([string]::IsNullOrEmpty($buildConfiguration) -eq $true)
        {
            Write-Host "Defaulting to Debug build configuration...`r`n"
            $buildConfiguration = "Debug"
        }
    }

    If ([string]::IsNullOrEmpty($caelumVersion) -eq $true)
    {
        Throw "Caelum build version must be specified for this environment."
    }

    If ([string]::IsNullOrEmpty($subtextVersion) -eq $true)
    {
        Throw "Subtext build version must be specified for this environment."
    }

    If ([string]::IsNullOrEmpty($buildConfiguration) -eq $true)
    {
        Write-Host "Defaulting to Release build configuration...`r`n"
        $buildConfiguration = "Release"
    }

    $siteName = $($siteUrl.Host)

    $sitePath = "C:\inetpub\wwwroot\" + $siteName
    $appPoolIdentity = "IIS APPPOOL\" + $siteName

    If ($($siteUrl.AbsoluteUri) -eq "http://www-test.technologytoolbox.com/")
    {
        $appPoolIdentity = "NT AUTHORITY\Network Service"
    }

    Write-Debug "App pool identity: $appPoolIdentity"

    RemoveWebsite $siteName $sitePath

    Write-Host "Creating application pool ($siteName)...`r`n"
    $appPool = New-WebAppPool -Name $siteName
    If ($appPoolIdentity -eq "NT AUTHORITY\Network Service")
    {
        Write-Host "Setting app pool identity ($appPoolIdentity)...`r`n"
        $appPool.processModel.identityType = "NetworkService"
        $appPool | Set-Item
        Write-Host "Successfully set app pool identity ($appPoolIdentity).`r`n"
    }

    Write-Host "Successfully created application pool ($siteName).`r`n"

    Write-Host "Creating website folder ($sitePath)...`r`n"
    New-Item -Type Directory -Path $sitePath > $null
    Write-Host "Successfully created website folder ($sitePath).`r`n"

    Write-Host "Creating website ($sitePath)...`r`n"
    New-Website -Name $siteName -HostHeader $siteName `
        -PhysicalPath $sitePath -ApplicationPool $siteName > $null

    Write-Host "Successfully created website ($sitePath).`r`n"

    Write-Host "Copying Subtext website content...`r`n"
    Copy-Item "\\dazzler\Builds\Subtext\$subtextVersion\$buildConfiguration\_PublishedWebsites\Subtext.Web" "$sitePath\blog" -Recurse
    Write-Host "Successfully copied Subtext website content.`r`n"

    Write-Host "Granting read/write access on Subtext App_Data folder...`r`n"
    icacls "$sitePath\blog\App_Data" /grant ($appPoolIdentity + ":(OI)(CI)(M)") | Out-Default
    Write-Host "Successfully granted read/write access on Subtext App_Data folder.`r`n"

    Write-Host "Creating new application for blog site...`r`n"
    New-WebApplication -Site $siteName -Name blog -PhysicalPath "$sitePath\blog" -ApplicationPool $siteName > $null
    Write-Host "Successfully created new application for blog site.`r`n"

    Write-Host "Copying Caelum website content...`r`n"
    Copy-Item \\dazzler\Builds\Caelum\$caelumVersion\$buildConfiguration\_PublishedWebsites\Website\* $sitePath -Recurse -Force
    Write-Host "Successfully copied Caelum website content.`r`n"

    If ($($siteUrl.AbsoluteUri) -eq "http://www-test.technologytoolbox.com/")
    {
        Write-Host "Overwriting Web.config files...`r`n"
        Copy-Item "$sitePath\Web.TEST.config" "$sitePath\Web.config" -Force
        Copy-Item "$sitePath\blog\Web.TEST.config" "$sitePath\blog\Web.config" -Force
        Write-Host "Successfully overwrote Web.config files.`r`n"
    }

    Write-Host -Fore Green "Successfully rebuilt Web application.`r`n"
}

Main $caelumVersion $subtextVersion $buildConfiguration

## Usage
#
# Rebuild Website.cmd
# ------------------------------
#   PowerShell.exe -Command ".\'Rebuild Website.ps1'; Exit $LASTEXITCODE" > "Rebuild Website.log" 2>&1
#   EXIT %ERRORLEVEL%
#
# "Manual" deployments to TEST
# ------------------------------
#   PS C:\> cd 'C:\NotBackedUp\TechnologyToolbox\Caelum\Main\Source\Deployment Files\Scripts'
#   PS C:\NotBackedUp\...\Scripts> & '.\Rebuild Website.ps1' 1.0.57.0 2.5.2.9
##