$ErrorActionPreference = "Stop"

Get-Command -syntax ${PSCommandPath} >$null

$xpy = Join-Path $PSScriptRoot x.py

$xpy_args = @($xpy) + $args

function Get-Application($app) {

$cmd = Get-Command $app -ErrorAction SilentlyContinue -CommandType Application | Select-Object -First 1

return $cmd

}

function Invoke-Application($application, $arguments) {

& $application $arguments

Exit $LASTEXITCODE

}

foreach ($python in "py", "python3", "python", "python2") {

# NOTE: this only tests that the command exists in PATH, not that it's actually

# executable. The latter is not possible in a portable way, see

# https://github.com/PowerShell/PowerShell/issues/12625.

if (Get-Application $python) {

if ($python -eq "py") {

# Use python3, not python2

$xpy_args = @("-3") + $xpy_args

}

Invoke-Application $python $xpy_args

}

}

$found = (Get-Application "python*" | Where-Object {$_.name -match '^python[2-3]\.[0-9]+(\.exe)?$'})

if (($null -ne $found) -and ($found.Length -ge 1)) {

$python = $found[0]

Invoke-Application $python $xpy_args

}

$msg = "${PSCommandPath}: error: did not find python installed`n"

$msg += "help: consider installing it from https://www.python.org/downloads/"

Write-Error $msg -Category NotInstalled

Exit 1