PowerShell utilities for Windows Terminal

Get-WindowsTerminalVersion.ps1

# this is one of Stéphane BARIZIEN's public domain scripts
# the most recent version can be found at:
# https://gist.github.com/sba923/c41f97a5f4ea15c957227712f42b14f3#file-get-windowsterminalversion-ps1

# cSpell: ignore wekyb bbwe Stéphane BARIZIEN

<#
.SYNOPSIS
Returns the Windows Terminal version for the current PowerShell session host chain.

.DESCRIPTION
Walks up the current process parent chain to detect whether PowerShell is running
inside Windows Terminal. If a WindowsTerminal process is found, returns its file
version and whether the detected package flavor is Preview.

If no WindowsTerminal parent process is found, the script returns $null.

.OUTPUTS
System.Management.Automation.PSCustomObject

When found, returns an object with:
- Version
- IsPreview

Returns $null when not running in Windows Terminal.

.EXAMPLE
Returns the detected Windows Terminal version and flavor information for the current
session, or $null if this session is not hosted by Windows Terminal.

Get-WindowsTerminalVersion.ps1
#>

$psPID = [System.Diagnostics.Process]::GetCurrentProcess() | Select-Object -ExpandProperty ID
$process = Get-Process -Id $psPID

$isWinPS = ($PSVersionTable.PSVersion.Major -eq 5)

while ($true)
{
    if ($isWinPS)
    {
        $parentPID = (Get-CimInstance Win32_Process | Where-Object ProcessID -eq $process.Id).ParentProcessId
        if ($null -ne $parentPID)
        {
            $parent = Get-Process -Id $parentPID
        }
        else
        {
            $parent = $null
        }
    }
    else
    {
        $parent = $process.Parent
    }
    if ($null -eq $parent)
    {
        $wtVersion = $null
        break
    }
    if ($parent.Name -eq 'WindowsTerminal')
    {
        $wtVersion = $parent.FileVersion
        $wtFlavor = $parent.Path -replace '.*Microsoft\.([^_]+)_.*__8wekyb3d8bbwe\\WindowsTerminal.exe', '$1'
        break
    }
    $process = $parent
}

if ($null -eq $wtVersion)
{
    $null
}
else
{
    [PSCustomObject]@{
        Version = $wtVersion
        IsPreview  = ($wtFlavor -match 'Preview')
    }
}