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							- [CmdletBinding()]
 
- Param(
 
-     #[switch]$CustomParam,
 
-     [Parameter(Position=0,Mandatory=$false,ValueFromRemainingArguments=$true)]
 
-     [string[]]$BuildArguments
 
- )
 
- Write-Output "Windows PowerShell $($Host.Version)"
 
- Set-StrictMode -Version 2.0; $ErrorActionPreference = "Stop"; $ConfirmPreference = "None"; trap { exit 1 }
 
- $PSScriptRoot = Split-Path $MyInvocation.MyCommand.Path -Parent
 
- ###########################################################################
 
- # CONFIGURATION
 
- ###########################################################################
 
- $BuildProjectFile = "$PSScriptRoot\nukebuild\_build.csproj"
 
- $TempDirectory = "$PSScriptRoot\\.tmp"
 
- $DotNetGlobalFile = "$PSScriptRoot\\global.json"
 
- $DotNetInstallUrl = "https://raw.githubusercontent.com/dotnet/cli/master/scripts/obtain/dotnet-install.ps1"
 
- $DotNetChannel = "Current"
 
- $env:DOTNET_SKIP_FIRST_TIME_EXPERIENCE = 1
 
- $env:DOTNET_CLI_TELEMETRY_OPTOUT = 1
 
- $env:NUGET_XMLDOC_MODE = "skip"
 
- ###########################################################################
 
- # EXECUTION
 
- ###########################################################################
 
- function ExecSafe([scriptblock] $cmd) {
 
-     & $cmd
 
-     if ($LASTEXITCODE) { exit $LASTEXITCODE }
 
- }
 
- # If global.json exists, load expected version
 
- if (Test-Path $DotNetGlobalFile) {
 
-     $DotNetGlobal = $(Get-Content $DotNetGlobalFile | Out-String | ConvertFrom-Json)
 
-     if ($DotNetGlobal.PSObject.Properties["sdk"] -and $DotNetGlobal.sdk.PSObject.Properties["version"]) {
 
-         $DotNetVersion = $DotNetGlobal.sdk.version
 
-     }
 
- }
 
- # If dotnet is installed locally, and expected version is not set or installation matches the expected version
 
- if ($null -ne (Get-Command "dotnet" -ErrorAction SilentlyContinue) -and `
 
-      (!(Test-Path variable:DotNetVersion) -or $(& dotnet --version) -eq $DotNetVersion)) {
 
-     $env:DOTNET_EXE = (Get-Command "dotnet").Path
 
- }
 
- else {
 
-     $DotNetDirectory = "$TempDirectory\dotnet-win"
 
-     $env:DOTNET_EXE = "$DotNetDirectory\dotnet.exe"
 
-     # Download install script
 
-     $DotNetInstallFile = "$TempDirectory\dotnet-install.ps1"
 
-     mkdir -force $TempDirectory > $null
 
-     (New-Object System.Net.WebClient).DownloadFile($DotNetInstallUrl, $DotNetInstallFile)
 
-     # Install by channel or version
 
-     if (!(Test-Path variable:DotNetVersion)) {
 
-         ExecSafe { & $DotNetInstallFile -InstallDir $DotNetDirectory -Channel $DotNetChannel -NoPath }
 
-     } else {
 
-         ExecSafe { & $DotNetInstallFile -InstallDir $DotNetDirectory -Version $DotNetVersion -NoPath }
 
-     }
 
-     $env:PATH="$DotNetDirectory;$env:PATH"
 
- }
 
- Write-Output "Microsoft (R) .NET Core SDK version $(& $env:DOTNET_EXE --version)"
 
- ExecSafe { & $env:DOTNET_EXE run --project $BuildProjectFile -- $BuildArguments }
 
 
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