public static int Main(string[] args)
{
var options = new Options();
if (!options.Parse())
{
PrintUsage(options);
return -1;
}
var cts = new CancellationTokenSource();
var ct = cts.Token;
Console.CancelKeyPress += delegate { cts.Cancel(); };
try
{
var engine = AnalysisEngine.FromFilePaths(
options.FilePaths,
symbolConfigurations: options.SymbolConfigurations,
alwaysDefinedSymbols: options.DefinedSymbols,
alwaysDisabledSymbols: options.DisabledSymbols,
alwaysIgnoredSymbols: options.IgnoredSymbols,
undefinedSymbolValue: options.UndefinedSymbolValue,
cancellationToken: ct).Result;
engine.DocumentAnalyzed += (analysisEngine, info, cancellationToken) => OnDocumentAnalyzed(analysisEngine, options, info, cancellationToken);
RunAsync(engine, options, ct).Wait(ct);
}
catch (OperationCanceledException)
{
Console.WriteLine("Canceled.");
return 1;
}
return 0;
}
private static async Task RunAsync(AnalysisEngine engine, Options options, CancellationToken cancellationToken)
{
var regionInfos = await engine.GetConditionalRegionInfo(cancellationToken);
PrintConditionalRegionInfo(options, regionInfos);
if (options.PrintSymbolInfo)
{
Console.WriteLine();
PrintSymbolInfo(engine);
}
}
private static void PrintUsage(Options options)
{
Console.WriteLine(
@"SYNTAX
DeadRegions [<project> ...] [options]
DeadRegions [<source file> ...] [options]
");
Console.WriteLine(options.Usage);
Console.WriteLine(
@"NOTES
* The (possibly) environment dependent set of preprocessor symbols for a
given project determined by MsBuild when loading an input project file will
be ignored; only explicitly specified build configurations will be used in
analysis.
* When multiple projects are specified as input, the intersection of the
files in all the projects will be analyzed.
* <symbol list> is a comma or semi-colon separated list of preprocessor
symbols.");
}
private static void PrintConditionalRegionInfo(Options options, IEnumerable <DocumentConditionalRegionInfo> regionInfos)
{
int disabledCount = 0;
int enabledCount = 0;
int varyingCount = 0;
var originalForegroundColor = Console.ForegroundColor;
foreach (var info in regionInfos)
{
foreach (var chain in info.Chains)
{
foreach (var region in chain.Regions)
{
if (region.State == Tristate.False)
{
disabledCount++;
Console.ForegroundColor = ConsoleColor.Blue;
if (options.PrintDisabled)
{
Console.WriteLine(region);
}
}
else if (region.State == Tristate.True)
{
enabledCount++;
Console.ForegroundColor = ConsoleColor.Green;
if (options.PrintEnabled)
{
Console.WriteLine(region);
}
}
else
{
varyingCount++;
Console.ForegroundColor = ConsoleColor.DarkGray;
if (options.PrintVarying)
{
Console.WriteLine(region);
}
}
}
}
}
Console.ForegroundColor = originalForegroundColor;
// Print summary
int totalRegionCount = disabledCount + enabledCount + varyingCount;
if (totalRegionCount == 0)
{
Console.WriteLine("Did not find any conditional regions.");
}
else
{
Console.WriteLine("Conditional Regions");
Console.WriteLine(" {0,5} found in total", totalRegionCount);
if (disabledCount > 0)
{
Console.WriteLine(" {0,5} always disabled", disabledCount);
}
if (enabledCount > 0)
{
Console.WriteLine(" {0,5} always enabled", enabledCount);
}
if (varyingCount > 0)
{
Console.WriteLine(" {0,5} varying", varyingCount);
}
}
// TODO: Lines of disabled/enabled/varying code. This involves calculating unnecessary regions, converting those to line spans.
}
private static async Task OnDocumentAnalyzed(AnalysisEngine engine, Options options, DocumentConditionalRegionInfo info, CancellationToken cancellationToken)
{
if (options.Edit)
{
var fileInfo = new FileInfo(info.Document.FilePath);
if (fileInfo.IsReadOnly || !fileInfo.Exists)
{
Console.WriteLine("warning: skipping document '{0}' because it {1}.",
info.Document.FilePath, fileInfo.IsReadOnly ? "is read-only" : "does not exist");
return;
}
var document = await engine.RemoveUnnecessaryRegions(info, cancellationToken);
document = await engine.SimplifyVaryingPreprocessorExpressions(document, cancellationToken);
var text = await document.GetTextAsync(cancellationToken);
using (var file = File.Open(document.FilePath, FileMode.Truncate, FileAccess.Write))
{
var writer = new StreamWriter(file, text.Encoding);
text.Write(writer, cancellationToken);
await writer.FlushAsync();
}
}
}
private static void PrintConditionalRegionInfo(Options options, IEnumerable<DocumentConditionalRegionInfo> regionInfos)
{
int disabledCount = 0;
int enabledCount = 0;
int varyingCount = 0;
var originalForegroundColor = Console.ForegroundColor;
foreach (var info in regionInfos)
{
foreach (var chain in info.Chains)
{
foreach (var region in chain.Regions)
{
if (region.State == Tristate.False)
{
disabledCount++;
Console.ForegroundColor = ConsoleColor.Blue;
if (options.PrintDisabled)
{
Console.WriteLine(region);
}
}
else if (region.State == Tristate.True)
{
enabledCount++;
Console.ForegroundColor = ConsoleColor.Green;
if (options.PrintEnabled)
{
Console.WriteLine(region);
}
}
else
{
varyingCount++;
Console.ForegroundColor = ConsoleColor.DarkGray;
if (options.PrintVarying)
{
Console.WriteLine(region);
}
}
}
}
}
Console.ForegroundColor = originalForegroundColor;
// Print summary
int totalRegionCount = disabledCount + enabledCount + varyingCount;
if (totalRegionCount == 0)
{
Console.WriteLine("Did not find any conditional regions.");
}
else
{
Console.WriteLine("Conditional Regions");
Console.WriteLine(" {0,5} found in total", totalRegionCount);
if (disabledCount > 0)
{
Console.WriteLine(" {0,5} always disabled", disabledCount);
}
if (enabledCount > 0)
{
Console.WriteLine(" {0,5} always enabled", enabledCount);
}
if (varyingCount > 0)
{
Console.WriteLine(" {0,5} varying", varyingCount);
}
}
// TODO: Lines of disabled/enabled/varying code. This involves calculating unnecessary regions, converting those to line spans.
}