Use caching for filesystem queries in BindingsGenerator

Source/Tools/Flax.Build/Bindings/BindingsGenerator.Cache.cs

@@ -253,7 +253,7 @@ namespace Flax.Build.Bindings
             {
                 // Version
                 writer.Write(CacheVersion);
-                writer.Write(File.GetLastWriteTime(Assembly.GetExecutingAssembly().Location).Ticks);
+                writer.Write(FileCache.GetLastWriteTime(Assembly.GetExecutingAssembly().Location).Ticks);
 
                 // Build options
                 writer.Write(moduleOptions.IntermediateFolder);
@@ -270,7 +270,7 @@ namespace Flax.Build.Bindings
                 {
                     var headerFile = headerFiles[i];
                     writer.Write(headerFile);
-                    writer.Write(File.GetLastWriteTime(headerFile).Ticks);
+                    writer.Write(FileCache.GetLastWriteTime(headerFile).Ticks);
                 }
 
                 // Info
@@ -281,7 +281,7 @@ namespace Flax.Build.Bindings
         private static bool LoadCache(ref ModuleInfo moduleInfo, BuildOptions moduleOptions, List<string> headerFiles)
         {
             var path = GetCachePath(moduleInfo.Module, moduleOptions);
-            if (!File.Exists(path))
+            if (!FileCache.Exists(path))
                 return false;
             try
             {
@@ -292,7 +292,7 @@ namespace Flax.Build.Bindings
                     var version = reader.ReadInt32();
                     if (version != CacheVersion)
                         return false;
-                    if (File.GetLastWriteTime(Assembly.GetExecutingAssembly().Location).Ticks != reader.ReadInt64())
+                    if (FileCache.GetLastWriteTime(Assembly.GetExecutingAssembly().Location).Ticks != reader.ReadInt64())
                         return false;
 
                     // Build options
@@ -320,7 +320,7 @@ namespace Flax.Build.Bindings
                         var headerFile = headerFiles[i];
                         if (headerFile != reader.ReadString())
                             return false;
-                        if (File.GetLastWriteTime(headerFile).Ticks > reader.ReadInt64())
+                        if (FileCache.GetLastWriteTime(headerFile).Ticks > reader.ReadInt64())
                             return false;
                     }
 

Source/Tools/Flax.Build/Build/FileCache.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+
+namespace Flax.Build
+{
+    /// <summary>
+    /// Cache filesystem related queries like File.Exists and File.GetLastWriteTime.
+    /// </summary>
+    public static class FileCache
+    {
+        private static Dictionary<string, FileInfo> fileInfoCache = new Dictionary<string, FileInfo>();
+
+        public static void FileRemoveFromCache(string path)
+        {
+            //fileInfoCache[path].Refresh();
+            fileInfoCache.Remove(path);
+        }
+        
+        public static bool Exists(string path)
+        {
+            if (fileInfoCache.TryGetValue(path, out var fileInfo))
+                return fileInfo.Exists;
+
+            fileInfo = new FileInfo(path);
+            fileInfoCache.Add(path, fileInfo);
+            return fileInfo.Exists;
+        }
+
+        public static DateTime GetLastWriteTime(string path)
+        {
+
+            if (fileInfoCache.TryGetValue(path, out var fileInfo))
+                return fileInfo.LastWriteTime;
+
+            fileInfo = new FileInfo(path);
+            fileInfoCache.Add(path, fileInfo);
+            return fileInfo.LastWriteTime;
+        }
+    }
+}

Source/Tools/Flax.Build/Build/NativeCpp/IncludesCache.cs

@@ -17,8 +17,6 @@ namespace Flax.Build.NativeCpp
         private static Dictionary<string, string[]> AllIncludesCache = new();
         private static Dictionary<string, DateTime> DirectIncludesTimestampCache = new();
         private static Dictionary<string, DateTime> AllIncludesTimestampCache = new();
-        private static Dictionary<string, bool> FileExistsCache = new();
-        private static Dictionary<string, DateTime> FileTimestampCache = new();
         private static readonly string IncludeToken = "include";
         private static string CachePath;
 
@@ -141,26 +139,6 @@ namespace Flax.Build.NativeCpp
             }
         }
 
-        private static bool FileExists(string path)
-        {
-            if (FileExistsCache.TryGetValue(path, out bool result))
-                return result;
-
-            result = File.Exists(path);
-            FileExistsCache.Add(path, result);
-            return result;
-        }
-
-        private static DateTime FileLastWriteTime(string path)
-        {
-            if (FileTimestampCache.TryGetValue(path, out DateTime result))
-                return result;
-
-            result = File.GetLastWriteTime(path);
-            FileTimestampCache.Add(path, result);
-            return result;
-        }
-
         /// <summary>
         /// Finds all included files by the source file (including dependencies).
         /// </summary>
@@ -176,7 +154,7 @@ namespace Flax.Build.NativeCpp
             {
                 if (AllIncludesTimestampCache.TryGetValue(sourceFile, out var cachedTimestamp))
                 {
-                    lastModified = FileLastWriteTime(sourceFile);
+                    lastModified = FileCache.GetLastWriteTime(sourceFile);
                     if (lastModified == cachedTimestamp)
                         return result;
                 }
@@ -185,7 +163,7 @@ namespace Flax.Build.NativeCpp
                 AllIncludesTimestampCache.Remove(sourceFile);
             }
 
-            if (!FileExists(sourceFile))
+            if (!FileCache.Exists(sourceFile))
                 throw new Exception(string.Format("Cannot scan file \"{0}\" for includes because it does not exist.", sourceFile));
 
             //using (new ProfileEventScope("FindAllIncludedFiles"))
@@ -231,7 +209,7 @@ namespace Flax.Build.NativeCpp
 
         private static string[] GetDirectIncludes(string sourceFile)
         {
-            if (!FileExists(sourceFile))
+            if (!FileCache.Exists(sourceFile))
                 return Array.Empty<string>();
             DateTime? lastModified = null;
 
@@ -241,7 +219,7 @@ namespace Flax.Build.NativeCpp
             {
                 if (DirectIncludesTimestampCache.TryGetValue(sourceFile, out var cachedTimestamp))
                 {
-                    lastModified = FileLastWriteTime(sourceFile);
+                    lastModified = FileCache.GetLastWriteTime(sourceFile);
                     if (lastModified == cachedTimestamp)
                         return result;
                 }
@@ -325,11 +303,11 @@ namespace Flax.Build.NativeCpp
 
                 // Relative to the workspace root
                 var includedFilePath = Path.Combine(Globals.Root, "Source", includedFile);
-                if (!FileExists(includedFilePath))
+                if (!FileCache.Exists(includedFilePath))
                 {
                     // Relative to the source file
                     includedFilePath = Path.Combine(sourceFileFolder, includedFile);
-                    if (!FileExists(includedFilePath))
+                    if (!FileCache.Exists(includedFilePath))
                     {
                         // Relative to any of the included project workspaces
                         var project = Globals.Project;
@@ -337,7 +315,7 @@ namespace Flax.Build.NativeCpp
                         foreach (var reference in project.References)
                         {
                             includedFilePath = Path.Combine(reference.Project.ProjectFolderPath, "Source", includedFile);
-                            if (FileExists(includedFilePath))
+                            if (FileCache.Exists(includedFilePath))
                             {
                                 isValid = true;
                                 break;
@@ -348,7 +326,7 @@ namespace Flax.Build.NativeCpp
                         if (!isValid && isLibraryInclude)
                         {
                             includedFilePath = Path.Combine(Globals.Root, "Source", "ThirdParty", includedFile);
-                            if (FileExists(includedFilePath))
+                            if (FileCache.Exists(includedFilePath))
                             {
                                 isValid = true;
                             }
@@ -375,7 +353,7 @@ namespace Flax.Build.NativeCpp
             result = includedFiles.ToArray();
             DirectIncludesCache.Add(sourceFile, result);
             if (!DirectIncludesTimestampCache.ContainsKey(sourceFile))
-                DirectIncludesTimestampCache.Add(sourceFile, lastModified ?? FileLastWriteTime(sourceFile));
+                DirectIncludesTimestampCache.Add(sourceFile, lastModified ?? FileCache.GetLastWriteTime(sourceFile));
             return result;
         }
     }