Remove-TrailingWhitespace.ps1

<#
    .SYNOPSIS
    Removes whitespace at the end of every line of text in a file

    .DESCRIPTION
    This quickly fixes the extra tabs and spaces that IDE's add to the ends of lines or blank lines in powershell 
    scripts. Those extra chars can cause loading or execution issues.


    .NOTE
    Its using write-host to emit to the VS output window, as I have this configured in External Tools to run for the active document.  

#>
function Remove-TrailingWhitespace
{
    [CmdletBinding()]
    Param(
        [string] $Path, 
        [switch] $DontAttemptCheckout
    )

    Write-Host "Removing trailing whitespace from file '$Path'"
    $countOfTrims = 0
    $lines = @()
    $content = Get-Content $Path
    foreach ($line in $content)
    {
        $trimLine = $line.TrimEnd()
        if ($trimLine.Length -lt $line.Length)
        {
            $countOfTrims++
        }
        $lines += $trimLine
    }
    if ($countOfTrims -gt 0)
    {
        Write-Host "Trailing whitespace removed from $countOfTrims lines"
        if ($DontAttemptCheckout.IsPresent -eq $false)
        {
            Write-Host "Attempting checkout of file"
            Edit-TfVcFile -Path $Path
        }
        Write-Host "Saving file"
        Set-Content -Value $lines -Path $Path
        Write-Host "File saved"
    }
    else
    {
        Write-Host "No trailing whitespace found to remove"
    }    
    
}