PowerShell · daxian-dbw · Nov 10, 2017 · Nov 8, 2017 · Nov 8, 2017 · Nov 10, 2017
@@ -1442,6 +1442,14 @@ function Start-PSBootstrap {
 
         # Install Windows dependencies if `-Package` or `-BuildWindowsNative` is specified
         if ($Environment.IsWindows) {
+            ## The VSCode build task requires 'pwsh.exe' to be found in Path
+            if (-not (Get-Command -Name pwsh.exe -CommandType Application -ErrorAction SilentlyContinue))
+            {
+                log "pwsh.exe not found. Install latest PowerShell Core release and add it to Path"
+                $psInstallFile = [System.IO.Path]::Combine($PSScriptRoot, "tools", "install-powershell.ps1")
+                & $psInstallFile -AddToPath
+            }
+
             ## need RCEdit to modify the binaries embedded resources
             if (-not (Test-Path "~/.rcedit/rcedit-x64.exe"))
             {

@@ -0,0 +1,112 @@
+<#
+.Synopsis
+    Install PowerShell Core on Windows.
+.DESCRIPTION
+    By default, the latest PowerShell Core release package will be installed.
+    If '-Daily' is specified, then the latest PowerShell Core daily package will be installed.
+.Parameter Destination
+    The destination path to install PowerShell Core to.
+.Parameter Daily
+    Install PowerShell Core from the daily build.
+    Note that the 'PackageManagement' module is required to install a daily package.
+.Parameter DoNotOverwrite
+    Do not overwrite the destination folder if it already exists.
+.Parameter AddToPath
+    Add the absolute destination path to the 'User' scope environment variable 'Path'
+#>
+[CmdletBinding()]
+param(
+    [Parameter()]
+    [ValidateNotNullOrEmpty()]
+    [string] $Destination,
+
+    [Parameter()]
+    [switch] $Daily,
+
+    [Parameter()]
+    [switch] $DoNotOverwrite,
+
+    [Parameter()]
+    [switch] $AddToPath
+)
+
+Set-StrictMode -Version latest
+$ErrorActionPreference = "Stop"
+
+if (-not $Destination) {
+    $Destination = "$env:LOCALAPPDATA\Microsoft\powershell"
+    if ($Daily) {
+        $Destination = "${Destination}-daily"
+    }
+}
+
+if (Test-Path -Path $Destination) {
+    if ($DoNotOverwrite) {
+        throw "Destination folder '$Destination' already exist. Use a different path or omit '-DoNotOverwrite' to overwrite."
+    }
+    Remove-Item -Path $Destination -Recurse -Force
+}
+New-Item -ItemType Directory -Path $Destination -Force > $null
+$Destination = Resolve-Path -Path $Destination | ForEach-Object -MemberName Path
+Write-Verbose "Destination: $Destination" -Verbose
+
+$architecture = switch ($env:PROCESSOR_ARCHITECTURE) {
+                    "AMD64" { "x64" }
+                    "x86"   { "x86" }
+                    default  { throw "PowerShell package for OS architecture '$_' is not supported." }
+                }
+$tempDir = Join-Path ([System.IO.Path]::GetTempPath()) ([System.IO.Path]::GetRandomFileName())
+New-Item -ItemType Directory -Path $tempDir -Force > $null
+try {
+    if ($Daily) {
+        if (-not (Get-Module -Name PackageManagement -ListAvailable)) {
+            throw "PackageManagement module is required to install daily PowerShell Core."
+        }
+
+        if ($architecture -ne "x64") {
+            throw "The OS architecture is '$architecture'. However, we currently only support daily package for x64 Windows."
+        }
+
+        ## Register source if not yet
+        if (-not (Get-PackageSource -Name powershell-core-daily -ErrorAction SilentlyContinue)) {
+            $packageSource = "https://powershell.myget.org/F/powershell-core-daily"
+            Write-Verbose "Register powershell-core-daily package source '$packageSource' with PackageManagement" -Verbose
+            Register-PackageSource -Name powershell-core-daily -Location $packageSource -ProviderName nuget -Trusted > $null
+        }
+
+        $packageName = "powershell-win-x64-win7-x64"
+        $package = Find-Package -Source powershell-core-daily -AllowPrereleaseVersions -Name $packageName
+        Write-Verbose "Daily package found. Name: $packageName; Version: $($package.Version)" -Verbose
+        Install-Package -InputObject $package -Destination $tempDir -ExcludeVersion > $null
+
+        $contentPath = [System.IO.Path]::Combine($tempDir, $packageName, "content")
+        Copy-Item -Path $contentPath\* -Destination $Destination -Recurse -Force
+    } else {
+        $metadata = Invoke-RestMethod https://api.github.com/repos/powershell/powershell/releases/latest
+        $release = $metadata.tag_name -replace '^v'
+
+        $packageName = "PowerShell-${release}-win-${architecture}.zip"
+        $downloadURL = "https://github.com/PowerShell/PowerShell/releases/download/v${release}/${packageName}"
+        Write-Verbose "About to download package from '$downloadURL'" -Verbose
+
+        $packagePath = Join-Path -Path $tempDir -ChildPath $packageName
+        Invoke-WebRequest -Uri $downloadURL -OutFile $packagePath
+
+        Expand-Archive -Path $packagePath -DestinationPath $Destination
+    }
+
+    if ($AddToPath -and (-not $env:Path.Contains($Destination))) {
+        ## Add to the User scope 'Path' environment variable
+        $userPath = [System.Environment]::GetEnvironmentVariable("Path", "User")
+        $userPath = $Destination + [System.IO.Path]::PathSeparator + $userPath
+        [System.Environment]::SetEnvironmentVariable("Path", $userPath, "User")
+
+        ## Add to the 'Path' for the current process
+        $env:Path = $Destination + [System.IO.Path]::PathSeparator + $env:Path
+        Write-Verbose "'$Destination' is added to Path" -Verbose
+    }
+
+    Write-Host "PowerShell Core has been installed at $Destination" -ForegroundColor Green
+} finally {
+    Remove-Item -Path $tempDir -Recurse -Force -ErrorAction SilentlyContinue
+}