Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Compilation/ApplicationBuildProvider.cs

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+//------------------------------------------------------------------------------
+// <copyright file="ApplicationBuildProvider.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+
+
+namespace System.Web.Compilation {
+
+using System;
+using System.IO;
+using System.Collections;
+using System.CodeDom.Compiler;
+using System.Web.Hosting;
+using System.Web.Util;
+using System.Web.UI;
+
+internal class ApplicationBuildProvider: BaseTemplateBuildProvider {
+
+    internal static BuildResultCompiledGlobalAsaxType GetGlobalAsaxBuildResult(bool isPrecompiledApp) {
+
+        string cacheKey = BuildManager.GlobalAsaxAssemblyName;
+        
+        // Try the cache first, and if it's not there, compile it
+        BuildResultCompiledGlobalAsaxType result = BuildManager.GetBuildResultFromCache(cacheKey) as
+            BuildResultCompiledGlobalAsaxType;
+        if (result != null)
+            return result;
+
+        // If this is a precompiled app don't attempt to compile it
+        if (isPrecompiledApp)
+            return null;
+
+        VirtualPath virtualPath = BuildManager.GlobalAsaxVirtualPath;
+
+        // If global.asax doesn't exist, just ignore it
+        if (!virtualPath.FileExists())
+            return null;
+
+        // Compile global.asax
+        ApplicationBuildProvider buildProvider = new ApplicationBuildProvider();
+        buildProvider.SetVirtualPath(virtualPath);
+
+        DateTime utcStart = DateTime.UtcNow;
+
+        BuildProvidersCompiler bpc = new BuildProvidersCompiler(virtualPath /*configPath*/, 
+            BuildManager.GenerateRandomAssemblyName(BuildManager.GlobalAsaxAssemblyName));
+
+        // Set the BuildProvider using a single item collection
+        bpc.SetBuildProviders(new SingleObjectCollection(buildProvider));
+
+        CompilerResults results = bpc.PerformBuild();
+
+        result = (BuildResultCompiledGlobalAsaxType) buildProvider.GetBuildResult(results);
+
+        // Top level assembliy should not be cached to memory.
+        result.CacheToMemory = false;
+
+        // Cache it for next time
+        BuildManager.CacheBuildResult(cacheKey, result, utcStart);
+
+        // Return the compiled type
+        return result;
+    }
+
+    protected override TemplateParser CreateParser() {
+        return new ApplicationFileParser();
+    }
+
+    internal override BaseCodeDomTreeGenerator CreateCodeDomTreeGenerator(TemplateParser parser) {
+        return new ApplicationFileCodeDomTreeGenerator((ApplicationFileParser)parser);
+    }
+
+    internal override BuildResultCompiledType CreateBuildResult(Type t) {
+        BuildResultCompiledGlobalAsaxType result = new BuildResultCompiledGlobalAsaxType(t);
+
+        // If global.asax contains <object> tags, set a flag to avoid doing useless work
+        // later on in HttpApplicationFactory (VSWhidbey 453101)
+        if (Parser.ApplicationObjects != null || Parser.SessionObjects != null)
+            result.HasAppOrSessionObjects = true;
+
+        return result;
+    }
+}
+
+}