private static byte[] GetSerializationVersion()
{
using (new DebugTimer("SerializationVersionInitialization")) {
SHA256 sha = SHA256Managed.Create();
StringBuilder sb = new StringBuilder();
var attrs = (AnalysisSerializationSupportedTypeAttribute[])typeof(AnalysisSerializationSupportedTypeAttribute).Assembly.GetCustomAttributes(typeof(AnalysisSerializationSupportedTypeAttribute), false);
// we don't want to rely upon the order of reflection here...
Array.Sort <AnalysisSerializationSupportedTypeAttribute>(
attrs,
(Comparison <AnalysisSerializationSupportedTypeAttribute>)((x, y) => String.CompareOrdinal(x.Type.Name, y.Type.Name))
);
foreach (var attr in attrs)
{
var type = attr.Type;
sb.AppendLine(type.FullName);
foreach (FieldInfo field in AnalysisSerializer.GetSerializableMembers(type))
{
sb.Append(field.FieldType.FullName);
sb.Append(' ');
sb.Append(field.Name);
sb.AppendLine();
}
}
return(BitConverter.GetBytes(_analyzerVersion)
.Concat(sha.ComputeHash(Encoding.UTF8.GetBytes(sb.ToString())))
.ToArray());
}
}
private void SaveAnalysis() {
if (_implicitProject || _projectFileDir == null || !_saveToDisk) {
return;
}
try {
using (new DebugTimer("SaveAnalysis")) {
var path = GetAnalysisPath();
var tempPath = path + ".tmp";
bool failed = false;
if (File.Exists(tempPath)) {
// Create doesn't overwrite hidden files, so delete it
File.Delete(tempPath);
}
using (FileStream fs = new FileStream(tempPath, FileMode.Create)) {
new FileInfo(tempPath).Attributes |= FileAttributes.Hidden;
fs.Write(DbHeader, 0, DbHeader.Length);
try {
var serializer = new AnalysisSerializer();
serializer.Serialize(fs, _jsAnalyzer);
} catch (Exception e) {
Debug.Fail("Failed to save analysis " + e);
failed = true;
}
}
if (!failed) {
if (File.Exists(path)) {
File.Delete(path);
}
File.Move(tempPath, path);
} else {
File.Delete(tempPath);
}
}
} catch (IOException) {
} catch (UnauthorizedAccessException) {
}
}
private bool LoadCachedAnalysis(AnalysisLimits limits) {
if (_analysisLevel == AnalysisLevel.NodeLsNone || _analysisLevel == AnalysisLevel.Preview) {
return false;
}
string analysisDb = GetAnalysisPath();
if (File.Exists(analysisDb) && ShouldEnqueue()) {
FileStream stream = null;
bool disposeStream = true;
try {
stream = new FileStream(analysisDb, FileMode.Open);
byte[] header = new byte[DbHeader.Length];
stream.Read(header, 0, header.Length);
if (DbHeader.SequenceEqual(header)) {
var statusbar = (IVsStatusbar)NodejsPackage.GetGlobalService(typeof(SVsStatusbar));
if (statusbar != null) {
statusbar.SetText(SR.GetString(SR.StatusAnalysisLoading));
}
Task.Run(() => {
try {
using (new DebugTimer("LoadAnalysis")) {
var serializer = new AnalysisSerializer();
var analyzer = (JsAnalyzer)serializer.Deserialize(stream);
AnalysisQueue queue;
if (analyzer.Limits.Equals(limits)) {
queue = new AnalysisQueue(this);
foreach (var entry in analyzer.AllModules) {
_projectFiles[entry.FilePath] = new ProjectItem(entry);
}
_reparseDateTime = new FileInfo(analysisDb).LastWriteTime;
_analysisQueue = queue;
_jsAnalyzer = analyzer;
if (statusbar != null) {
statusbar.SetText(SR.GetString(SR.StatusAnalysisLoaded));
}
}
}
} catch (InvalidOperationException) {
// corrupt or invalid DB
if (statusbar != null) {
statusbar.SetText(SR.GetString(SR.StatusAnalysisLoadFailed));
}
} catch (Exception e) {
Debug.Fail(String.Format("Unexpected exception while loading analysis: {0}", e));
// bug in deserialization
if (statusbar != null) {
statusbar.SetText(SR.GetString(SR.StatusAnalysisLoadFailed));
}
} finally {
stream.Dispose();
// apply any changes
lock (_loadingDeltas) {
if (_jsAnalyzer == null) {
// we failed to load the cached analysis, create a new
// analyzer now...
CreateNewAnalyzer(LoadLimits());
}
_fullyLoaded = true;
foreach (var delta in _loadingDeltas) {
delta();
}
}
}
}).HandleAllExceptions(SR.GetString(SR.NodejsToolsForVisualStudio)).DoNotWait();
disposeStream = false;
return true;
}
} catch (IOException) {
} finally {
if (stream != null && disposeStream) {
stream.Dispose();
}
}
}
return false;
}