translitterate-lite.ps1

Param(
   [Parameter(Mandatory=$true,Position=0,ValueFromPipeline=$true,HelpMessage="Provide a full path to files")]
   [ValidateScript({Test-Path $_ -PathType 'Container'})]
   [alias("p")]
   [System.String]$path
)

# Translitterate function http://j.mp/10YwkXP
function OC_translitterate {
    param(
        [string]$inputString
    )
    [string]$formD = $inputString.Normalize(
            [System.text.NormalizationForm]::FormD
    )
    $stringBuilder = new-object System.Text.StringBuilder
    for ($i = 0; $i -lt $formD.Length; $i++){
        $unicodeCategory = [System.Globalization.CharUnicodeInfo]::GetUnicodeCategory($formD[$i])
        $nonSPacingMark = [System.Globalization.UnicodeCategory]::NonSpacingMark
        if($unicodeCategory -ne $nonSPacingMark){
            $stringBuilder.Append($formD[$i]) | Out-Null
        }
    }
    $string = $stringBuilder.ToString().Normalize([System.text.NormalizationForm]::FormC)
    return $string
}

# Total counter
$total = 0

# Rename folders
Get-ChildItem -LiteralPath $path -Recurse -Force -EA 0 | ? {$_.psIsContainer -eq $true} | Sort @{expression = {$_.Fullname.length}} -descending | %{
    if($_.Name -ne ($new = OC_translitterate $_)) {
        Write-Host "Rename folder:" $_.Fullname
        Move-Item -Force -LiteralPath $_.Fullname -Destination (Join-Path ($_.Fullname | Split-Path -Parent) -Childpath $new)
        $total++
    }
}

# Rename files
gci -LiteralPath $path -Recurse -Force | Where {$_.psIsContainer -eq $false} | %{
    if($_.Name -ne ($new = OC_translitterate $_)) {
        Write-Host "Rename file: " + $_.Fullname
        Move-Item -LiteralPath $_.Fullname -Destination (Join-Path ($_.Fullname | Split-Path -Parent) -Childpath $new)
        $total++
    }
}

Write-Host -ForegroundColor green "Total $total items renamed!"