/// <summary>
/// Loads the module of the given name using the host provided semantics.
///
/// The default semantics are to search the host path for a file of the specified
/// name.
/// </summary>
/// <param name="name"></param>
/// <returns>A valid SourceUnit or null no module could be found.</returns>
/// <exception cref="System.InvalidOperationException">An ambigious module match has occured</exception>
public virtual SourceUnit ResolveSourceFileUnit(string name)
{
Contract.RequiresNotNull(name, "name");
SourceUnit result = null;
foreach (string directory in SourceUnitResolutionPath)
{
string finalPath = null;
foreach (string extension in _environment.GetRegisteredFileExtensions())
{
string fullPath = Path.Combine(directory, name + extension);
if (ScriptDomainManager.CurrentManager.PAL.FileExists(fullPath))
{
if (result != null)
{
throw new InvalidOperationException(String.Format(Resources.AmbigiousModule, fullPath, finalPath));
}
LanguageProvider provider;
if (!ScriptDomainManager.CurrentManager.TryGetLanguageProviderByFileExtension(extension, out provider))
{
// provider may have been unregistered, let's pick another one:
continue;
}
result = SourceUnit.CreateFileUnit(provider.GetEngine(), NormalizePath(fullPath), Encoding.Default);
finalPath = fullPath;
}
}
}
return(result);
}
