[CmdletBinding()]

Param(

[Parameter(Position=0,Mandatory=$false)]

[string]$Target = "default",

[ValidateSet("Release", "Debug")]

[string]$Configuration = "Release",

[ValidateSet("Quiet", "Minimal", "Normal", "Verbose", "Diagnostic")]

[string]$Verbosity = "Verbose",

[Alias("DryRun","Noop")]

[switch]$WhatIf,

[switch]$Mono,

[switch]$SkipToolPackageRestore,

[Parameter(Position=1,Mandatory=$false,ValueFromRemainingArguments=$true)]

[string[]]$ScriptArgs

)

$Script = "build.cake"

[Reflection.Assembly]::LoadWithPartialName("System.Security") | Out-Null

function MD5HashFile([string] $filePath)

{

if ([string]::IsNullOrEmpty($filePath) -or !(Test-Path $filePath -PathType Leaf))

{

return $null

}

[System.IO.Stream] $file = $null;

[System.Security.Cryptography.MD5] $md5 = $null;

try

{

$md5 = [System.Security.Cryptography.MD5]::Create()

$file = [System.IO.File]::OpenRead($filePath)

return [System.BitConverter]::ToString($md5.ComputeHash($file))

}

finally

{

if ($file -ne $null)

{

$file.Dispose()

}

}

}

Write-Host "Preparing to run build script..."

if(!$PSScriptRoot){

$PSScriptRoot = Split-Path $MyInvocation.MyCommand.Path -Parent

}

$TOOLS_DIR = Join-Path $PSScriptRoot "tools"

$NUGET_EXE = Join-Path $TOOLS_DIR "nuget.exe"

$CAKE_EXE = Join-Path $TOOLS_DIR "Cake/Cake.exe"

$NUGET_URL = "https://dist.nuget.org/win-x86-commandline/latest/nuget.exe"

$PACKAGES_CONFIG = Join-Path $TOOLS_DIR "packages.config"

$PACKAGES_CONFIG_MD5 = Join-Path $TOOLS_DIR "packages.config.md5sum"

$UseMono = "";

if($Mono.IsPresent) {

Write-Verbose -Message "Using the Mono based scripting engine."

$UseMono = "-mono"

}

$UseExperimental = "";

if(!($Mono.IsPresent)) {

Write-Verbose -Message "Using experimental version of Roslyn."

$UseExperimental = "-experimental"

}

$UseDryRun = "";

if($WhatIf.IsPresent) {

$UseDryRun = "-dryrun"

}

if ((Test-Path $PSScriptRoot) -and !(Test-Path $TOOLS_DIR)) {

Write-Verbose -Message "Creating tools directory..."

New-Item -Path $TOOLS_DIR -Type directory | out-null

}

if (!(Test-Path $PACKAGES_CONFIG)) {

Write-Verbose -Message "Downloading packages.config..."

try { (New-Object System.Net.WebClient).DownloadFile("http://cakebuild.net/download/bootstrapper/packages", $PACKAGES_CONFIG) } catch {

Throw "Could not download packages.config."

}

}

if (!(Test-Path $NUGET_EXE)) {

Write-Verbose -Message "Trying to find nuget.exe in PATH..."

$existingPaths = $Env:Path -Split ';' | Where-Object { (![string]::IsNullOrEmpty($_)) -and (Test-Path $_) }

$NUGET_EXE_IN_PATH = Get-ChildItem -Path $existingPaths -Filter "nuget.exe" | Select -First 1

if ($NUGET_EXE_IN_PATH -ne $null -and (Test-Path $NUGET_EXE_IN_PATH.FullName)) {

Write-Verbose -Message "Found in PATH at $($NUGET_EXE_IN_PATH.FullName)."

$NUGET_EXE = $NUGET_EXE_IN_PATH.FullName

}

}

if (!(Test-Path $NUGET_EXE)) {

Write-Verbose -Message "Downloading NuGet.exe..."

try {

(New-Object System.Net.WebClient).DownloadFile($NUGET_URL, $NUGET_EXE)

} catch {

Throw "Could not download NuGet.exe."

}

}

$ENV:NUGET_EXE = $NUGET_EXE

if(-Not $SkipToolPackageRestore.IsPresent) {

Push-Location

Set-Location $TOOLS_DIR

# Check for changes in packages.config and remove installed tools if true.

[string] $md5Hash = MD5HashFile($PACKAGES_CONFIG)

if((!(Test-Path $PACKAGES_CONFIG_MD5)) -Or

($md5Hash -ne (Get-Content $PACKAGES_CONFIG_MD5 ))) {

Write-Verbose -Message "Missing or changed package.config hash..."

Remove-Item * -Recurse -Exclude packages.config,nuget.exe

}

Write-Verbose -Message "Restoring tools from NuGet..."

$NuGetOutput = Invoke-Expression "&`"$NUGET_EXE`" install -ExcludeVersion -OutputDirectory `"$TOOLS_DIR`""

if ($LASTEXITCODE -ne 0) {

Throw "An error occured while restoring NuGet tools."

}

else

{

$md5Hash | Out-File $PACKAGES_CONFIG_MD5 -Encoding "ASCII"

}

Write-Verbose -Message ($NuGetOutput | out-string)

Pop-Location

}

if (!(Test-Path $CAKE_EXE)) {

Throw "Could not find Cake.exe at $CAKE_EXE"

}

Write-Host "Running build script..."

Invoke-Expression "& `"$CAKE_EXE`" `"$Script`" -target=`"$Target`" -configuration=`"$Configuration`" -verbosity=`"$Verbosity`" $UseMono $UseDryRun $UseExperimental $ScriptArgs -settings_skipverification=true"

exit $LASTEXITCODE