Initialize Visual Studio Developer Powershell from a regular Powershell 7 and Powershell 5.1 session

vcvarsall.ps1

$paths = @(
    "C:\Program Files\Microsoft Visual Studio\2022\Community",
    "C:\Program Files\Microsoft Visual Studio\2022\BuildTools",
    "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community",
    "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools"
)

$VsInstallPath = $null

foreach ($basePath in $paths) {
    if (Test-Path $basePath) {
        $VsInstallPath = $basePath
        break
    }
}
if (-not $VsInstallPath) {
    Write-Host "No valid Visual Studio installation path found."
    exit
}

$DevShellPath = Join-Path $VsInstallPath 'Common7\Tools\Microsoft.VisualStudio.DevShell.dll'
Import-Module $DevShellPath
$instances = Get-ChildItem -Path "C:/ProgramData/Microsoft/VisualStudio/Packages/_Instances/" -Name

if ($instances.Count -eq 0) {
    Write-Host "No Visual Studio instances found."
    exit
}

Enter-VsDevShell -VsInstallPath $VsInstallPath -DevCmdArguments '-arch=x64'