Public/Start-DevShell.ps1
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function Get-VsInstallerPath { [CmdletBinding()] param() $programFilesX86 = ${env:ProgramFiles(x86)} if (-not $programFilesX86) { $programFilesX86 = [Environment]::GetFolderPath('ProgramFilesX86') } if (-not $programFilesX86) { return $null } Join-Path $programFilesX86 'Microsoft Visual Studio\Installer' } function Get-CleanLoginPath { [CmdletBinding()] param() $separator = [System.IO.Path]::PathSeparator $segments = foreach ($pathValue in @( [Environment]::GetEnvironmentVariable('Path', 'Machine'), [Environment]::GetEnvironmentVariable('Path', 'User') )) { if ($pathValue) { $pathValue -split [regex]::Escape($separator) | Where-Object { $_ } } } $installerPath = Get-VsInstallerPath if ($installerPath) { $segments += $installerPath } ($segments | Select-Object -Unique) -join $separator } function Invoke-DevShellProcess { [CmdletBinding()] param( [Parameter(Mandatory)] [hashtable]$Environment ) Start-Process -FilePath 'pwsh' -ArgumentList @('-NoLogo') -NoNewWindow -Wait -Environment $Environment } function Start-DevShell { <# .SYNOPSIS Starts a nested PowerShell session for a Visual Studio developer environment. .DESCRIPTION Starts pwsh inline in the current window and waits until the nested shell exits. The selected Visual Studio year is passed to the child process via VSDEV_VERSION, with VSDEV_ARCH and VSDEV_HOSTARCH carrying architecture choices. The child process receives a clean login PATH composed from the Machine and User PATH values plus the Visual Studio Installer directory, so an already-loaded toolset in the parent process is not inherited. This cmdlet is only a launcher. A profile or provider module in the child session is expected to honor VSDEV_VERSION by invoking the matching Set-VS<year> command. .PARAMETER Version Visual Studio year to request, such as 2022 or 2026. Defaults to the latest year returned by Get-InstalledVsVersion. .PARAMETER Arch Target architecture to pass to the child session through VSDEV_ARCH. Defaults to amd64. .PARAMETER HostArch Host architecture to pass to the child session through VSDEV_HOSTARCH. Defaults to amd64. .EXAMPLE Start-DevShell Starts a nested PowerShell session for the latest discoverable Visual Studio developer environment. .EXAMPLE Start-DevShell 2022 Starts a nested PowerShell session requesting Visual Studio 2022. #> [CmdletBinding()] param( [Parameter(Position = 0)] [ArgumentCompleter({ param($commandName, $parameterName, $wordToComplete, $commandAst, $fakeBoundParameters) Get-InstalledVsVersion | Where-Object { "$_" -like "$wordToComplete*" } | ForEach-Object { "$_" } })] [int]$Version, [ValidateNotNullOrEmpty()] [string]$Arch = 'amd64', [ValidateNotNullOrEmpty()] [string]$HostArch = 'amd64' ) Assert-WindowsOnly -CommandName $MyInvocation.MyCommand.Name $installedVersions = @(Get-InstalledVsVersion | ForEach-Object { [int]$_ } | Sort-Object -Descending -Unique) if ($installedVersions.Count -eq 0) { throw 'No installed Visual Studio developer environments were found. Install Visual Studio and a provider that exposes Set-VS<year> commands.' } $selectedVersion = if ($PSBoundParameters.ContainsKey('Version')) { $Version } else { $installedVersions[0] } if ($selectedVersion -notin $installedVersions) { throw "Visual Studio $selectedVersion is not available. Available versions: $($installedVersions -join ', ')." } $environment = @{ VSDEV_VERSION = [string]$selectedVersion VSDEV_ARCH = $Arch VSDEV_HOSTARCH = $HostArch PATH = Get-CleanLoginPath } Invoke-DevShellProcess -Environment $environment } |