brigadier/Get-Bootcamp.ps1

[CmdletBinding()]
Param(
    [string]$Model = (Get-WmiObject -Class Win32_ComputerSystem).Model,
    [switch]$Install,
    [string]$OutputDir = $PWD,
    [switch]$KeepFiles,
    [array]$ProductId,
    [string]$SUCATALOG_URL = 'http://swscan.apple.com/content/catalogs/others/index-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog',
    [string]$SEVENZIP_URL = 'http://www.7-zip.org/a/7z1604-x64.msi'
)

# Disable Invoke-WebRequest progress bar to speed up download due to bug
$ProgressPreference = "SilentlyContinue"

# Create Output Directory if it does not exist
if (!(Test-Path $OutputDir)) { New-Item -Path $OutputDir -ItemType Directory -Force }

# Check if at least 7zip 15.14 is installed. If not, download and install it.
$7z = "$env:ProgramFiles\7-Zip\7z.exe"
$7zDownload = Join-Path $env:Temp $SEVENZIP_URL.Split('/')[-1]
if (Test-Path $7z) { $7zInstalled = $true }
if ([version](Get-ItemProperty $7z).VersionInfo.FileVersion -lt 15.14) {
    Write-Host "7-Zip not installed, will install and remove."
    Invoke-WebRequest -Uri $SEVENZIP_URL -OutFile $7zDownload -ErrorAction Stop
    Start-Process -FilePath $env:SystemRoot\System32\msiexec.exe -ArgumentList "/i $7zDownload /qb- /norestart" -Wait -Verbose
}

Write-Host "Using model: $Model"

# Read data from sucatalog and find all Bootcamp ESD's
Write-Host "Downloading software update catalog..."
[xml]$sucatalog = Invoke-WebRequest -Uri $SUCATALOG_URL -Method Get -ErrorAction Stop
$sucatalog.plist.dict.dict.dict | Where-Object { $_.String -match "Bootcamp" } | ForEach-Object {
    # Search dist files to find supported models, using regex match to find models in dist files - stole regex from brigadier's source
    $modelRegex = "([a-zA-Z]{4,12}[1-9]{1,2}\,[1-6])"
    $distURL = ($_.dict | Where-Object { $_.Key -match "English" }).String
    $distXML = (Invoke-RestMethod -Uri $distURL).InnerXml
    $SupportedModels = [regex]::Matches($distXML,$modelRegex).Value
    if ($SupportedModels -contains $Model) { 
        $version = [regex]::Match($distURL,"(\d{3}-\d{4,5})").Value
        Write-Output "Found supported ESD: $Version, posted $($_.Date)"
        [array]$bootcamplist += $_ 
    }
}

if ($bootcamplist.Length -gt 1) { 
    Write-Host "Found more than 1 supported Bootcamp ESD. Selecting newest based on posted date which may not always be correct"
} elseif ($bootcamplist.length -eq 0) {
    Write-Warning "Couldn't find a Boot Camp ESD for the model $Model in the given software update catalog."
    exit 1
}

$esd = $bootcamplist | Sort-Object -Property Date | Select-Object -Last 1
# Build a hash table of the package's properties from the XML
$package = $esd.array.dict.selectnodes('key') | ForEach-Object {@{$($_.'#text') = $($_.nextsibling.'#text')}}
$package += @{'ESDVersion' = $Version}
Write-Host "Selected $($package.ESDVersion) as it's the most recently posted."

$landingDir = Join-Path $OutputDir "BootCamp-$($package.ESDVersion)"
$workingDir = Join-Path $env:Temp "BootCamp-unpack-$($package.ESDVersion)"
$packagePath = Join-Path $workingDir 'BootCampESD.pkg'
$payloadPath = Join-Path $workingDir 'Payload~'
$dmgPath = Join-Path $workingDir 'WindowsSupport.dmg'

if (Test-Path -PathType Container $landingDir) {
    # Python just deletes the folder
    Write-Warning "Final destination folder $landingDir already exists, please remove it to redownload."
    exit 1
}
if (-not (Test-Path -PathType Container $workingDir)) {mkdir $workingDir > $null}

# Download the BootCamp ESD if required
if (-not (Test-Path -PathType Leaf $packagePath)) {
    Write-Host "Starting download from $($package.URL)"
    Start-BitsTransfer -Source $package.URL -Destination "$packagePath" -ErrorAction Stop
    Write-Host "Download complete"
} else {
    # Not sure what's used for the digest, but we can match size.
    if ((Get-Item $packagePath | Select -ExpandProperty Length) -eq $package.Size) {
        Write-Host "$($package.ESDVersion) already exists at $packagePath, not redownloading."
    } else {
        Write-Warning "A file already exists at $packagePath but does not match $($package.URL), please remove it."
        exit 1
    }
}

# Extract the bootcamp installer
Write-Host "Extracting..."
& $7z -o"$workingDir" -y e "$packagePath"
& $7z -o"$workingDir" -y e "$payloadPath"
if (-not (Test-Path -PathType Container $landingDir)) {mkdir $landingDir > $null}
& $7z -o"$landingDir" -y x "$dmgPath"

# Uninstall 7zip if we installed it
if ($7zInstalled -ne $true) {
    Write-Host "Removing 7-Zip..."
    Start-Process -FilePath $env:SystemRoot\System32\msiexec.exe -ArgumentList "/x $7zDownload /qb- /norestart" -Wait
    Remove-Item $7zDownload
}

# Install Bootcamp and use MST if specified (I uploaded one that I had to use to fix the latest ESD on an iMac14,1)
if ($Install) { 
    # Install Bootcamp
    $scaction = New-ScheduledTaskAction -Execute "msiexec.exe" -Argument "/i $landingDir\Bootcamp\Drivers\Apple\BootCamp.msi /qn /norestart"
    $sctrigger = New-ScheduledTaskTrigger -At ((Get-Date).AddSeconds(15)) -Once
    $scprincipal = New-ScheduledTaskPrincipal "SYSTEM" -RunLevel Highest
    $scsettings = New-ScheduledTaskSettingsSet
    $sctask = New-ScheduledTask -Action $scaction -Principal $scprincipal -Trigger $sctrigger -Settings $scsettings
    Register-ScheduledTask "Install Bootcamp" -InputObject $sctask -User "SYSTEM"
    do { Write-Output "Sleeping 20 seconds"; Start-Sleep -Seconds 20 } while (Get-Process -Name "msiexec" -ErrorAction SilentlyContinue)
    if (-not $KeepFiles) { Remove-Item -Path "$landingDir" -Recurse -Force -ErrorAction SilentlyContinue }
}

Write-Host "Cleaning up working directory..."
Remove-Item -Path $workingDir -Recurse