How to delete snapshots after X days (Windows cli master)

Creating a snapshot everyday with an automated task is easy. But what if you do not want to end up with endless snapshots without manually deleting them?

Here is a powershell script which uses the windows cli master to delete every snapshot that is older than X days:

#$count_days indicates after how many days a snapshot shall be deleted
$count_days = 11;
#all snapshots set in var $snapshots as string
$snapshots = profitbricks snapshot list | Out-String;
#$count_chars indictaes the chars in the 2nd line. used to measure and split the strings
$count_chars = ((profitbricks snapshot list)[1]).Length + 2;
#skip the first 11 chars and 3 first lines (not part of the snapshots)
$snapshots = $snapshots.substring(11 + $count_chars * 3);

#read snapshot-IDs and set them in $id_array as well as the date in $date_array
while ($snapshots.Length -gt 10){

    $count_skip = $count_chars - 33;

    [string[]] $id_array += $snapshots.substring(0,36) | Out-String;
    [string[]] $date_array += $snapshots.substring($count_skip,10) | Out-String;

    $snapshots = $snapshots.substring($count_chars);

}

#todays date
$today = Get-Date -format o | Out-String;
$today = $today.Substring(0,10);

#loop to compare time_spans
for ($i=0;$i -lt $id_array.Length;$i++){

$time_span = [datetime]$today - [datetime]$date_array[$i];

    #look for the number of days
    if ($time_span.TotalDays -gt $count_days){

    #read snapshot-ID
    $snap_del = $id_array[$i].substring(0,$id_array[$i].Length-2).ToString();

    #delete snapshot
    profitbricks snapshot delete -f -i "$snap_del"

    }
}

Save it as a ".ps1" file. Windows task is as following:

program: %SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe

arguments: -noprofile -NoLogo -noninteractive -ExecutionPolicy Bypass -File "C:\Your path\scriptname.ps1"

path: C:\Your path