Rename all file names and replace all files content

how-to.ps1

# copy the replace-everything.ps1 to the folder 
# run

.\replace-everything.ps1 -Folder . -FilePattern *.cs -TextToChange "from" -NewText "To"

replace-everything.ps1

param(
    [String] $Folder,
    [String] $FilePattern,
    [String] $TextToChange,
    [String] $NewText
)

function Remove-Empty-Folders {
    param($Path)

    Get-ChildItem $Path -Recurse -Force -Directory | 
        Sort-Object -Property FullName -Descending |
        Where-Object { $($_ | Get-ChildItem -Force | Select-Object -First 1).Count -eq 0 } |
        Remove-Item -Verbose

 }

function _change-file-contents-and-rename {
    param($Files)

    foreach ($file in $Files)
    {
        if($file.PSPath -Match '.git') { continue }
        if($file.PSPath -Match '.dll') { continue }

 

        if (-Not ($file -is [System.IO.DirectoryInfo])) {
            echo $("Changing: " + $file.name + " content..." )
            (Get-Content $file.PSPath) | Foreach-Object { $_ -replace $TextToChange, $NewText } | Set-Content $file.PSPath
        }
        $newFile = $file.name -replace $TextToChange, $NewText

 

       if ($file.name -ne $newFile) {
            echo $("Changing: " +  $file.name + " to " + $newFile)
            Rename-Item -NewName $newFile -ErrorAction Stop $file 
       }
    }
}

Remove-Empty-Folders -Path $Folder
$files = Get-ChildItem -Path $Folder -Recurse $FilePattern -File
_change-file-contents-and-rename -Files $files

$folders = Get-ChildItem -Path $Folder -Recurse -Directory
_change-file-contents-and-rename -Files $folders