Relink a directory after extracting it with 7zip. Replace all symlinks with `mklink /d`

relink.ps1

# Extract the archive with 7zip, for example `&"C:\Program Files\7-Zip\7z.exe" x .\file.tar`,
# and then run this script on the resulting directory. This will replace all symlinks with
# directory links created with `mklink /d`.
#
# This script requires you to run it in Administrator mode, or have Developer Mode enabled.
param (
    [string]$rootDirectory
)

if (-not (Test-Path $rootDirectory -PathType Container)) {
    Write-Host "Invalid directory: $rootDirectory"
    exit 1
}

Get-ChildItem -Path $rootDirectory -Recurse | ForEach-Object {
    $target_path = $_ | Select-Object -ExpandProperty Target
    if ($target_path -and $_.DirectoryName -and -not $_.Parent.FullName) {
        $target_path_full = $_.DirectoryName + "\" + $target_path

        # If the item is a symbolic link and a directory, then it is in an invalid form
        # that Windows can't understand. We need to recreate it using `mklink /d`
        if ($target_path_full -and (Test-Path $target_path_full -PathType Container)) {
            # Remove the symlink
            Remove-Item -Force $_.FullName

            # Create a new symlink using mklink /d in the directory pointed to by $_.DirectoryName
            cmd /c "mklink /d `"$($_.FullName)`" `"$target_path`""
        }
    }
}