PowerShell Which

Function

function which {
  Param(
    [Parameter(Position = 0, Mandatory)][string[]]$Names,
    [Parameter()][Switch][Alias('r')]$Raw
  )

  foreach ($Name in $Names) {
    if (!$Raw) { Write-Host "" }

    $Commands = Get-Command $Name -all -ErrorAction:Ignore

    if (!$Commands) {
      $Commands = [psobject]@{
        Name = $Name;
      }
    }

    foreach ($Command in $Commands) {

      if ($Raw) {
        if ($Command.Path -or $Command.Source) {
          Write-Output ($Command.Path ?? $Command.Source)
        } elseif ($Command.ResolvedCommand) {
          Write-Output $Command.ResolvedCommand
        } else {
          Write-Output "(???)"
        }
      } else {
        if ($Command.CommandType) {
          Write-Host "[$($Command.CommandType)] " -NoNewline -ForegroundColor Green
        } else {
          Write-Host "[Missing] " -NoNewline -ForegroundColor Red
        }

        Write-Host "$($Command.Name ?? $Name) " -NoNewline

        if ($Command.Path -or $Command.Source) {
          Write-Host "($($Command.Path ? $Command.Path : $Command.Source))" -ForegroundColor DarkGray
        } elseif ($Command.ResolvedCommand) {
          Write-Host "($($Command.ResolvedCommand))" -ForegroundColor DarkGray
        } else {
          Write-Host "(???)" -ForegroundColor DarkGray
        }
      }

    }
  }
}

Exapmle

$ which which, history, notepad

[Function] which (???)

[Alias] history (Get-History)

[Application] notepad.exe (C:\Windows\notepad.exe)
[Application] notepad.exe (C:\Windows\system32\notepad.exe)