public void Process(BundleContext context, BundleResponse response)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (response == null)
{
throw new ArgumentNullException(nameof(response));
}
try
{
ILessEngine lessEngine = new EngineFactory(ConfigureSettings(new DotlessConfiguration())).GetEngine();
if (context.CustomPropertiesCallback != null)
{
lessEngine.CurrentDirectory = context.CustomPropertiesCallback();// ".//Modules";
}
if (context.Parent is StyleBundle)
{
if (context.EnableOptimizations)
{
StringBuilder sb = new StringBuilder(response.Content.Length);
sb.Append(lessEngine.TransformToCss(response.Content.ToString(), response.ETag));
response.Content = sb;
if (!lessEngine.LastTransformationSuccessful)
{
response.TransformationErrors.Append($"Errors: {((LessEngine)lessEngine).LastTransformationError.Message}<br />Error details: {((LessEngine)lessEngine).LastTransformationError.ToString()}").Append("<br />");
context.Logger.LogCritical($"Error message: {((LessEngine)lessEngine).LastTransformationError.Message} {Environment.NewLine} Error details: {((LessEngine)lessEngine).LastTransformationError.ToString()}", ((LessEngine)lessEngine).LastTransformationError);
}
}
else if (context.EnableInstrumentation)
{
StringBuilder sb = new StringBuilder(10000);
foreach (BundleFile bundleFile in response.BundleFiles.Values)
{
if (bundleFile.PhysicalPath.LastIndexOf(".less") > 0)
{
sb.Append(lessEngine.TransformToCss(bundleFile.Content.ToString(), bundleFile.PhysicalPath));
if (!lessEngine.LastTransformationSuccessful)
{
AddErrors(((LessEngine)lessEngine).LastTransformationError, context, response, bundleFile.PhysicalPath);
}
bundleFile.Content = sb;
FileInfo fileInfo = new FileInfo(bundleFile.PhysicalPath);
string cssFileName = Path.Combine(fileInfo.Directory.FullName, fileInfo.Name.Replace(".less", ".css"));
//Create the css file
CreateFile(sb, cssFileName);
bundleFile.PhysicalPath = cssFileName;
bundleFile.VirtualPath = bundleFile.VirtualPath.Replace(".less", ".css");
}
}
}
}
}
catch (Exception ex)
{
response.TransformationErrors.Append($"Error: {ex.Message} {Environment.NewLine} Error details: {ex.StackTrace}").Append(Environment.NewLine);
context.Logger.LogCritical($"Error: {ex.Message} {Environment.NewLine} Error details: {ex.StackTrace}", ex);
throw;
}
}