Extending Sitecore Revolver to remove old versions.

Revolver-bind.cs

bind RevolverExtensions.TrimVersions,RevolverExtensions tv

Revolver-execute.cs

tv -r

TrimVersions.cs

public CommandResult Run(string[] args)
{
    ReadArgs(args);

    if (_context == null)
    {
        return new CommandResult(CommandStatus.Failure, "No Context");
    }

    if (_context.CurrentItem == null)
    {
        return new CommandResult(CommandStatus.Failure, "No Context Item");
    }

    var currentItem = _context.CurrentItem;
    if (currentItem.Versions.Count == 1 && !_recursive)
    {
        return new CommandResult(CommandStatus.Success, "Item only has one verison");
    }

    return BuildResponse(ProcessTrimVersionRequest(currentItem));
}

private CommandResult BuildResponse(string outputText)
{
    return new CommandResult(CommandStatus.Success, outputText);
}

private void ReadArgs(IEnumerable<string> args)
{
    _recursive = args.Any(x => x == RecursiveSwitch);
}

private string ProcessTrimVersionRequest(Item currentItem)
{
    var outputText = TrimVersionsForItem(currentItem);
    if (_recursive)
    {
        foreach (Item childItem in currentItem.Children)
        {
            outputText += ProcessTrimVersionRequest(childItem);
        }
    }

    return outputText;
}

private string TrimVersionsForItem(Item currentItem)
{
    var outputTextLine = String.Empty;
    foreach (var language in currentItem.Languages)
    {
        var langItem = _context.CurrentDatabase.GetItem(currentItem.ID, language);
        if (langItem.Versions.Count <= 1)
        {
            continue;
        }

        outputTextLine = String.Format("Trimmed:{0}, Lang:{1}, Versions:", currentItem.Paths.FullPath, langItem.Language.Name);
        foreach (var verItem in GetOldVersionsForLanguage(currentItem, langItem))
        {
            outputTextLine += verItem.Version.Number.ToString(CultureInfo.InvariantCulture) + ",";
            verItem.Versions.RemoveVersion();
        }
    }

    if (outputTextLine.EndsWith(","))
    {
        outputTextLine = outputTextLine.Substring(0, outputTextLine.Length - 1);
    }

    return String.IsNullOrEmpty(outputTextLine)
               ? outputTextLine
               : outputTextLine + "\r\n";
}

private static IEnumerable<Item> GetOldVersionsForLanguage(Item currentItem, Item langItem)
{
    return langItem.Versions.GetVersions().Where(x => x.Version != currentItem.Versions.GetLatestVersion(langItem.Language).Version);
}