PowerShell Safe Invocation

PowerShell Safe Invocation

Shell

Use PowerShell 7 through pwsh.exe unless Windows PowerShell 5.1 is explicitly required.

When the active shell is uncertain, verify:

$PSVersionTable.PSVersion
$PSNativeCommandArgumentPassing

Do not assume installing PowerShell 7 makes powershell.exe use PowerShell 7:

• pwsh.exe = PowerShell 7
• powershell.exe = Windows PowerShell 5.1

Native Programs

Never construct one large command string when arguments can be passed separately.

Use:

$exe = 'C:\Path With Spaces\tool.exe'
$argList = @(
    '--input'
    'C:\Data Folder\input.json'
    '--flag'
)

& $exe @argList

$exitCode = $LASTEXITCODE
if ($exitCode -ne 0) {
    throw "$exe failed with exit code $exitCode"
}