powershell scripts for adding rfc2307 attributes

$id_offset = 300000
$homedir_root = "/home/example.com"
$login_shell = "/bin/bash"
$search_bases = @("OU=Organisation,DC=example,DC=com", "CN=Users,DC=example,DC=com")

Write-Host "Using id offset ${id_offset}"

foreach ($search_base in $search_bases) {
    Write-Host "`nGenerating Unix attributes for user/group objects in ${search_base}"

    foreach ($ad_user in Get-ADUser -Filter * -SearchBase $search_base -Properties PrimaryGroupID) {
        $sid_uid = [int]"$($ad_user.SID)".split('-')[7]
        $username = $ad_user.SamAccountName
        $uid = $id_offset + $sid_uid
		$primary_group_gid = $id_offset + [int]$ad_user.PrimaryGroupID

        if ($uid -eq $id_offset -Or $primary_group_gid -eq $id_offset) {
            continue
        }

        $homedir = "${homedir_root}/${username}"

        Write-Host "${username}:*:${uid}:${primary_group_gid}:$($ad_user.name):${homedir}:${login_shell}"
        Set-ADUser -Identity $username -Replace @{uidNumber=$uid;gidNumber=$primary_group_gid;unixHomeDirectory=$homedir;loginShell=$login_shell}
    }

    foreach ($ad_group in Get-ADGroup -Filter * -SearchBase $search_base) {
        $sid_gid = [int]"$($ad_group.SID)".split('-')[7]
        $groupname = $ad_group.SamAccountName
        $gid = $id_offset + $sid_gid

        if ($gid -eq $id_offset) {
            continue
        }

        Write-Host "GID for group ${groupname}: ${gid}"
        Set-ADGroup -Identity $groupname -Replace @{gidNumber=$gid}
    }
}