private void AddInputParameters(SingleFileTransformer transformer, ITaskItem source, string inputType)
{
foreach (string paramName in source.MetadataNames)
{
var paramValue = source.GetMetadata(paramName);
Log.LogMessage(MessageImportance.Low, "Adding {0} parameter '{1}' with value: '{2}'", inputType,
paramName, paramValue);
transformer.AddParameter(paramName, paramValue);
}
}
/// <summary>
/// When overridden in a derived class, executes the task.
/// </summary>
/// <returns>
/// <see langword="true" /> if the task successfully executed;
/// otherwise, false.
/// </returns>
public override bool Execute()
{
if (!File.Exists(Input.ItemSpec))
{
Log.LogError("Source file '{0}' was not found.", Input.ItemSpec);
return(false);
}
if (!File.Exists(Xslt.ItemSpec))
{
Log.LogError("XSLT file '{0}' was not found.", Xslt.ItemSpec);
}
if (File.Exists(Output))
{
Log.LogMessage("Output file '{0}' exists and will be overwritten", Output);
}
using (var inputXml = File.OpenRead(Input.ItemSpec))
using (var xslt = File.OpenRead(Xslt.ItemSpec))
using (var output = File.Open(Output, FileMode.Create, FileAccess.ReadWrite, FileShare.Read))
{
var transformer = new SingleFileTransformer();
try
{
Log.LogMessage(MessageImportance.Low, "Processing XSLT...");
transformer.LoadXslt(xslt);
AddParameters(transformer);
Log.LogMessage(MessageImportance.Low, "Running transformation...");
transformer.Transform(inputXml, output);
Log.LogMessage(MessageImportance.Normal, "Transformation result saved to '{0}'", Output);
}
catch (Exception ex)
{
Log.LogErrorFromException(ex);
// Log Xslt compilation errors if available.
XsltException xe = ex as XsltException;
if (xe != null)
{
var xsltName = Path.GetFileName(Xslt.ItemSpec);
foreach (var xsltError in xe.XsltErrors)
{
Log.LogError($"{xsltName}({xsltError.LineNumber},{xsltError.ColumnNumber}): {xsltError.Message}");
}
}
return(false);
}
}
return(true);
}
private void AddParameters(SingleFileTransformer transformer)
{
AddInputParameters(transformer, Xslt, "XSLT");
AddInputParameters(transformer, Input, "XML");
}
