Import vsvars for VS 2017 Professional to set $env:VS150COMNTOOLS etc. Heavily based on https://github.com/Iristyle/Posh-VsVars/blob/8cb44c499a5da56db595a8ada085dba20998fce3/hanselman/Microsoft.PowerShell_profile%20-%20SAMPLE.ps1

profile.ps1

# Add this line to your profile.ps1
. $PSScriptRoot\vsvars.ps1

vsvars.ps1

function Get-Batchfile ($file) {
    $cmd = "`"$file`" & set"
    cmd /c $cmd | Foreach-Object {
        $p, $v = $_.split('=')
        Set-Item -path env:$p -value $v
    }
}

Get-Batchfile "${env:ProgramFiles(x86)}\Microsoft Visual Studio\2017\Professional\Common7\Tools\VsMSBuildCmd.bat"