Batch move osu! stable songs into groups for segmented import to lazer

README.md

Instructions

1. Run Split-Songs.ps1. It will move all of your songs into a directory called SongsBatch, with each batch having its own folder.
2. Once the initial move completes, a function called Move-OsuBatch will be defined globally. You can call this repeatedly to:
   1. Delete all files in the Songs directory
   2. Move all songs from the first batch to the Songs directory
3. Launch osu!lazer and import your songs from stable
4. Repeat steps 2 and 3 until finished

Split-Songs.ps1

$batchSize = 1000

function global:Move-OsuBatch
{
  Push-Location "$Env:LOCALAPPDATA/osu!"
  try
  {
    Remove-Item Songs\* -Confirm -Verbose -Recurse | Tee-Object -Append -FilePath 'Split-Songs.log'
    $dir = Get-ChildItem -Directory SongsBatch | Sort-Object {[int]$_.Name} | Select-Object -First 1
    $children = Get-ChildItem $dir
    foreach ($child in $children)
    {
      Move-Item -Force -Verbose -LiteralPath $child Songs *>&1 | Tee-Object -Append -FilePath 'Split-Songs.log'
    }
    Remove-Item -Verbose $dir *>&1 | Tee-Object -Append -FilePath 'Split-Songs.log'
  }
  finally
  {
    Pop-Location
  }
}

Push-Location "$Env:LOCALAPPDATA/osu!"

try
{
  $songs = Get-ChildItem Songs
  $counter = [pscustomobject] @{ Value = 0 }
  
  # https://stackoverflow.com/a/26850233/5880994
  $groups = $songs | Group-Object -Property { [math]::Floor($counter.Value++ / $batchSize) }
  
  foreach ($group in $groups)
  {
    $dir = New-Item "SongsBatch/$($group.Name)" -ItemType Directory -Force
    foreach ($item in $group.Group)
    {
      Move-Item -Verbose -LiteralPath $item $dir *>&1 | Tee-Object -Append -FilePath 'Split-Songs.log'
    }
  }
}
finally
{
  Pop-Location
}