Copy files between WSL distributions

Copy-BetweenWslInstance.psm1

# This function, Copy-BetweenWslInstance, is designed to facilitate the copying of files between different WSL distributions.
# It requires the source and destination distributions, folders, and users as parameters.
# If the destination folder or user is not specified, the function will default to using the source folder or user.
# The function employs the wslpath utility to convert the paths into a format that is compatible with WSL.
# Finally, it utilizes the Copy-Item cmdlet to execute the file copying process.
function Copy-BetweenWslInstance {
    param(
      [Parameter(Mandatory=$true)]
      [string]$sourceDistribution,
      [Parameter(Mandatory=$true)]
      [string]$sourceFolder,
      [Parameter(Mandatory=$true)]
      [string]$sourceUser,
      [Parameter(Mandatory=$true)]
      [string]$destinationDistribution,
      [string]$destinationFolder = $sourceFolder,
      [string]$destinationUser = $sourceUser
    )
  
    $confirmation = Read-Host "Are you sure you want to copy files from ${sourceDistribution}:${sourceFolder} as ${sourceUser} to ${destinationDistribution}:${destinationFolder} as ${destinationUser}? (Y/N)"
    if ($confirmation -ne 'Y') {
      Write-Host "Aborted."
      return
    }
  
    Copy-Item $(wsl -d $sourceDistribution -u $sourceUser wslpath -m $sourceFolder) $(wsl -d $destinationDistribution -u $destinationUser wslpath -m $destinationFolder) -Recurse
  
    Write-Host -ForegroundColor Blue "${sourceFolder} copied to ${destinationFolder} from ${sourceDistribution} to ${destinationDistribution}"
  }

  Export-ModuleMember -Function Copy-BetweenWslInstance