private IDisposable Prepare([NotNull] IProjectFile file)
{
var hierarchy = T4ResolutionUtils.TryGetVsHierarchy(file);
var components = Components.Value.CanBeNull;
if (components == null)
{
return(Disposable.Empty);
}
object oldHierarchy = components.Hierarchy;
string oldInputFileName = components.InputFile;
return(Disposable.CreateBracket(
() =>
{
components.Hierarchy = hierarchy;
components.InputFile = file.Location.IsNullOrEmpty() ? null : file.Location.FullPath;
},
() =>
{
components.Hierarchy = oldHierarchy;
components.InputFile = oldInputFileName;
},
false
));
}
private IReadOnlyDictionary <string, string> ResolveHeavyMacros(
[NotNull] IEnumerable <string> macros,
[NotNull] IProjectFile file
)
{
var result = new Dictionary <string, string>();
Lazy <IVsBuildMacroInfo> vsBuildMacroInfo = Lazy.Of(() => TryGetVsBuildMacroInfo(file), false);
foreach (string macro in macros)
{
bool succeeded = false;
string value = null;
if (vsBuildMacroInfo.Value != null)
{
succeeded = HResultHelpers.SUCCEEDED(vsBuildMacroInfo.Value.GetBuildMacroValue(macro, out value)) &&
!string.IsNullOrEmpty(value);
}
if (!succeeded)
{
value = MSBuildExtensions.GetStringValue(T4ResolutionUtils.TryGetVsHierarchy(file), macro, null);
succeeded = !string.IsNullOrEmpty(value);
}
if (succeeded)
{
result[macro] = value;
}
}
return(result);
}
private static IVsBuildMacroInfo TryGetVsBuildMacroInfo([NotNull] IProjectFile file) => T4ResolutionUtils.TryGetVsHierarchy(file) as IVsBuildMacroInfo;