PowerShell script that recursively scans all text files in a given directory and normalizes the end of file (by adding/removing newlines as appropriate)

normalizeEOLF.ps1

# This PowerShell Script will recursively scan all files in the given $scanDir
# and normalize the EOF by removing unnecessary whitespace and adding an EOL character to the last line of text
# Additionally, the script can normalize every EOL by trimming the trailing white space

cls;

$scanDir = "EnEffBIM-Framework"
$normalizeEOL = $TRUE

# get current directory, build scanPath
$curPath = Split-Path -Parent $MyInvocation.MyCommand.Path
$scanPath = $curPath + "\" + $scanDir

# use the same extensions for text files as specified in .gitattributes, in alphabetical order
$textFiles = Get-ChildItem -Recurse $scanPath -include *.h,*.mo,*.mos,*.py,*.order,*.txt -exclude *.csv,*.dat,*.md

# iterate through textFiles
ForEach ($file In $textFiles){
    # get content of each file
    $fileContent = Get-Content $file
    # count the lines
    $fileLineNumber = $fileContent.Count
    # Write-Host $file $fileLineNumber

    if($fileLineNumber -le 0){
        #file is empty, do nothing
        }
    elseif($fileLineNumber -eq 1){
        # if file has one line only: trim it
        $fileContent = $fileContent.trimEnd()
        }
    else{# file has more than 1 line        
        # if normalizeEOL, iterate through lines, trim each line
        if($normalizeEOL){ 
            for($i=0; $i -lt $fileLineNumber; $i++){$fileContent[$i] = $fileContent[$i].trimEnd()} 
        }
        # while last line is empty or contains white space only, decrease fileLineNumber and copy back fileContent without last line
        while([string]::IsNullOrWhitespace($fileContent[$fileLineNumber-1])){ 
            $fileLineNumber--
            $fileContent = $fileContent[0..($fileLineNumber-1)] 
        }
    }
    # write back modified fileContent to file    
    Set-Content $file $fileContent
}

This script needs PowerShell Version 3.0 or newer
Print your PowerShell version using
$PSVersionTable