Powershell macro to enable visual studio developer studio AND save your path

vsdev.ps1

function Enable-VsDevShell ()
{
  <#
  .Synopsis
  Enables Visual Studio developer commands in the current powershell.

  .Description
  Enables Visual Studio 2019 developer commands for the current powershell session.

  Requires Visual Studio 2019 to be installed.

  Typically aliased as 'vsdev'.

  .Example
  PS> Enable-VsDevShell
  PS> vsdev  # alias

  Locates and runs Visual Studio's powershell extension scripts that bring in important
  environment variables, helper commands and most importantly PATH changes that allow
  the compiler tools to be used.

  This isn't done by default because, on Windows, the Visual Studio compiler tool paths
  can result in a very unwieldy and inefficient PATH.

  #>


  if (-Not $IsWindows) {
    Write-Output "~~ vsdevshell has no effect except on Windows"
    return
  }

  # Locate the visual studio installer's "where" tool for locating vs paths.
  $VsWhere = Join-Path (Join-Path (Join-Path ${env:ProgramFiles(x86)} 'Microsoft Visual Studio') Installer) vswhere.exe
  if ( ! (Test-Path $VsWhere) ) {
    # Not found, can't help.
    throw "Visual studio is not installed in a recognized location. Could not find ${vswhere}"
  }

  # Get the most recent install path (-last 1) from its list of installed locations.
  # Specify "-products *" to include build tools
  $VisualStudioInstallPath = & $VsWhere -prerelease -latest -products * -property installationPath | select -last 1
  if ( ! ($VisualStudioInstallPath) )
  {
    throw "Visual studio installer located (${vswhere}), but it doesn't think any version of the IDE or Build Tools are installed Please check your installation / contact IT."
  }

  # Import the devshell module from that install
  Import-Module -ea stop (Join-Path (Join-Path (Join-Path $VisualStudioInstallPath Common7) Tools) Microsoft.VisualStudio.DevShell.dll)

  # Use the module's "Enter-VsDevShell" to enable it properly
  Enter-VsDevShell -VsInstallPath $VisualStudioInstallPath -SkipAutomaticLocation -DevCmdArguments "-arch=amd64 -host_arch=amd64"

  if ($env:PATH.length -gt 2000)
  {
    $Filters = @(
      'Linux.bin.ConnectionManagerExe$',
      'Microsoft.FSharp.Tools$',
      'Microsoft.TeamFoundation.Team Explorer$',
      'Microsoft.TestWindow$'
    )
    $PathParts = $env:PATH -split ';'
    $KeepParts = @()
    ForEach ($Part in $PathParts)
    {
      if ($Part -in $KeepParts) { continue }
      $Filtered = $false
      ForEach ($Filter in $Filters)
      {
        if ($Part -Match '[\\\/]{0}$' -f $Filter) { $Filtered = $true; break }
      }
      if (-Not $Filtered) { $KeepParts += $Part }
    }
    $env:PATH = $KeepParts -Join ';'
    Write-Host "-- Path shortened to $($env:PATH.length) characters"
  }
}

# Handy alias. -Force so you can run this script multiple times.
New-Alias -Name VsDev -Value Enable-VsDevShell -Force