I am working on a Starter Kit which adds some propertes and tabs to the standard Image Media Type.

I have written a Package action to create the new properties and also a set of Crops for the Image Cropper.

My code works fine when I call the Action via Package Action tester, but it doesn't do anything when the Action is calloed during the installation of my Starter Kit...

I am sure that the code is executed, and it doesn't log any error, it simply doesn't work...

Below is the class I have created:

public static class Extensions
{
    public static PropertyGroup AddnGetPropertyGroup(this IMediaType imageType, string Group)
    {
        imageType.AddPropertyGroup(Group);

        return imageType.PropertyGroups[Group];
    }
    public static void AddPropertyType(this PropertyTypeCollection properties, IDataTypeDefinition DataType, string Alias, string Name)
    {
        if (!properties.Contains(Alias))
        {
            PropertyType prop = new PropertyType(DataType);
            prop.Alias = Alias;
            prop.Name = Name;
            //prop.Description = "";
            properties.Add(prop);
        }
    }
}

public class ImportMedia : IPackageAction
{
    public bool Execute(string packageName, XmlNode xmlData)
    {
        IMediaService mediaService = ApplicationContext.Current.Services.MediaService;
        IDataTypeService dataTypeService = ApplicationContext.Current.Services.DataTypeService;
        IContentTypeService contentTypeService = ApplicationContext.Current.Services.ContentTypeService;

        try
        {
            string cropsJson =
@"[
{
  ""alias"": ""newsImage"",
  ""width"": 640,
  ""height"": 480
},
{
  ""alias"": ""gridImage"",
  ""width"": 330,
  ""height"": 330
},
{
  ""alias"": ""focusImage"",
  ""width"": 400,
  ""height"": 220
},
{
  ""alias"": ""masonryImage"",
  ""width"": 400,
  ""height"": 220
},
{
  ""alias"": ""carouselImage"",
  ""width"": 370,
  ""height"": 205
},
{
  ""alias"": ""galleryImage"",
  ""width"": 370,
  ""height"": 205
},
{
  ""alias"": ""sectionImage"",
  ""width"": 420,
  ""height"": 315
},
{
  ""alias"": ""bannerImage"",
  ""width"": 240,
  ""height"": 135
}
]
";
            IDataTypeDefinition imageCropper = dataTypeService.GetDataTypeDefinitionByName("Image Cropper");
            IDictionary<string, PreValue> crops = new Dictionary<string, PreValue>();
            crops.Add("crops", new PreValue(cropsJson));

            if (imageCropper != null)
            {
                dataTypeService.SaveDataTypeAndPreValues(imageCropper, crops);
            }
        }
        catch (Exception ex)
        {
            LogHelper.Error<ImportMedia>("Error during Cropper Image configuration in Govit Starter Kit", ex);
        }

        try
        {
            PropertyGroup langTab;
            IDataTypeDefinition GovitTextbox = dataTypeService.GetDataTypeDefinitionByName("Govit - Textbox");
            IDataTypeDefinition GovitTextarea = dataTypeService.GetDataTypeDefinitionByName("Govit - Textarea");
            IMediaType imageType = contentTypeService.GetMediaType(Constants.Conventions.MediaTypes.Image);

            langTab = imageType.AddnGetPropertyGroup("Italiano");
            if (langTab != null)
            {
                PropertyTypeCollection properties = langTab.PropertyTypes;
                properties.AddPropertyType(GovitTextbox, "govitImgTitleIT", "Titolo");
                properties.AddPropertyType(GovitTextbox, "govitImgAltIT", "Alt");
                properties.AddPropertyType(GovitTextarea, "govitImgDescriptionIT", "Descrizione");
            }

            langTab = imageType.AddnGetPropertyGroup("English");
            if (langTab != null)
            {
                PropertyTypeCollection properties = langTab.PropertyTypes;
                properties.AddPropertyType(GovitTextbox, "govitImgTitleEN", "Title");
                properties.AddPropertyType(GovitTextbox, "govitImgAltEN", "Alt");
                properties.AddPropertyType(GovitTextarea, "govitImgDescriptionEN", "Description");
            }
            contentTypeService.Save(imageType);
        }
        catch (Exception ex)
        {
            LogHelper.Error<ImportMedia>("Error during Image Media Type configuration in Govit Starter Kit", ex);
        }

        return true;
    }

    public string Alias()
    {
        return "govitImportMedia";
    }

    public bool Undo(string packageName, XmlNode xmlData)
    {
        return false;
    }

    public XmlNode SampleXml()
    {
        return umbraco.cms.businesslogic.packager.standardPackageActions.helper.parseStringToXmlNode("<Action runat=\"install\" alias=\"govitImportMedia\"></Action>");
    }
}

Any hint? I'm using Umbraco 7.6.4.