How to replace string in files and file and folder names recursively with PowerShell?

Question

With PowerShell (although other suggestions are welcome), how does one recursively loop a directory/folder and

1. replace text A with B in all files,
2. rename all files so that A is replaced by B, and last
3. rename all folders also so that A is replaced by B?

Answer 1

With a few requirements refinements, I ended up with this script:

$match = "MyAssembly" 
$replacement = Read-Host "Please enter a solution name"

$files = Get-ChildItem $(get-location) -filter *MyAssembly* -Recurse

$files |
    Sort-Object -Descending -Property { $_.FullName } |
    Rename-Item -newname { $_.name -replace $match, $replacement } -force



$files = Get-ChildItem $(get-location) -include *.cs, *.csproj, *.sln -Recurse 

foreach($file in $files) 
{ 
    ((Get-Content $file.fullname) -creplace $match, $replacement) | set-content $file.fullname 
}

read-host -prompt "Done! Press any key to close."

Answer 2

I would go with something like this:

Get-ChildItem $directory -Recurse |
    Sort-Object -Descending -Property { $_.FullName } |
    ForEach-Object {
        if (!$_.PsIsContainer) {
            ($_|Get-Content) -replace 'A', 'B' | Set-Content $_.FullName
        }
        $_
    } |
    Rename-Item { $_.name -replace 'A', 'B' }

The Sort-Object is there to ensure that first children (subdirs, files) are listed and then directories after them. (12345)