Scripting revamp

OmniSharp.sln

@@ -38,7 +38,7 @@ Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "OmniSharp.Roslyn", "src\Omn
 EndProject
 Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "OmniSharp.MSBuild", "src\OmniSharp.MSBuild\OmniSharp.MSBuild.xproj", "{9AF025CA-3706-401F-8D50-59FAD5AFE725}"
 EndProject
-Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "OmniSharp.ScriptCs", "src\OmniSharp.ScriptCs\OmniSharp.ScriptCs.xproj", "{F52F6F60-AB29-414D-A24B-DE8EFFBA34C0}"
+Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "OmniSharp.Script", "src\OmniSharp.Script\OmniSharp.Script.xproj", "{F52F6F60-AB29-414D-A24B-DE8EFFBA34C0}"
 EndProject
 Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "OmniSharp.MSBuild.Tests", "tests\OmniSharp.MSBuild.Tests\OmniSharp.MSBuild.Tests.xproj", "{194A88AE-1429-416B-86C1-BF6F7FF47404}"
 EndProject

src/OmniSharp.Roslyn.CSharp/Services/Diagnostics/CodeCheckService.cs

@@ -33,11 +33,11 @@ public async Task<QuickFixResponse> Handle(CodeCheckRequest request)
                 var semanticModel = await document.GetSemanticModelAsync();
                 IEnumerable<Diagnostic> diagnostics = semanticModel.GetDiagnostics();
 
-                //script files can have custom directives such as #load which will be deemed invalid by Roslyn
-                //we suppress the CS1024 diagnostic for script files for this reason. Roslyn will fix it later too, so this is temporary.
                 if (document.SourceCodeKind != SourceCodeKind.Regular)
                 {
-                    diagnostics = diagnostics.Where(diagnostic => diagnostic.Id != "CS1024");
+                    // CS8099 needs to be surpressed so that we can use #load directives in scripts
+                    // additionally, we need to suppress CS1701: https://github.com/dotnet/roslyn/issues/5501
+                    diagnostics = diagnostics.Where(diagnostic => diagnostic.Id != "CS8099" && diagnostic.Id != "CS1701");
                 }
 
                 foreach (var quickFix in diagnostics.Select(MakeQuickFix))

src/OmniSharp.Script/FileParser.cs

@@ -0,0 +1,57 @@
+using System.IO;
+using System.Linq;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+
+namespace OmniSharp.Script
+{
+    public class FileParser
+    {
+        public static FileParserResult ProcessFile(string path, CSharpParseOptions parseOptions)
+        {
+            var result = new FileParserResult();
+            ParseFile(path, result, parseOptions);
+            return result;
+        }
+
+        private static void ParseFile(string path, FileParserResult result, CSharpParseOptions parseOptions)
+        {
+            var fullPath = Path.GetFullPath(path);
+            if (result.LoadedScripts.Contains(fullPath))
+            {
+                return;
+            }
+
+            result.LoadedScripts.Add(fullPath);
+
+            var scriptCode = File.ReadAllText(fullPath);
+
+            var syntaxTree = CSharpSyntaxTree.ParseText(scriptCode, parseOptions);
+
+            var namespaces = syntaxTree.GetCompilationUnitRoot().Usings.Select(x => x.Name.ToString());
+            foreach (var ns in namespaces)
+            {
+                result.Namespaces.Add(ns.Trim());
+            }
+
+            var refs = syntaxTree.GetCompilationUnitRoot().GetReferenceDirectives().Select(x => x.File.ToString());
+            foreach (var reference in refs)
+            {
+                result.References.Add(reference.Replace("\"", string.Empty));
+            }
+
+            var loads = syntaxTree.GetCompilationUnitRoot().GetLoadDirectives().Select(x => x.File.ToString());
+            foreach (var load in loads)
+            {
+                var filePath = load.Replace("\"", string.Empty);
+                var currentWorkingDirectory = Path.GetDirectoryName(fullPath);
+
+                var loadFullPath = Path.IsPathRooted(filePath) ? filePath : Path.Combine(currentWorkingDirectory, filePath);
+                if (!string.IsNullOrWhiteSpace(loadFullPath))
+                {
+                    ParseFile(loadFullPath, result, parseOptions);
+                }
+            }
+        }
+    }
+}

src/OmniSharp.Script/FileParserResult.cs

@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+
+namespace OmniSharp.Script
+{
+    public class FileParserResult
+    {
+        public HashSet<string> Namespaces { get; } = new HashSet<string>();
+        public HashSet<string> References { get; } = new HashSet<string>();
+        public HashSet<string> LoadedScripts { get; } = new HashSet<string>();
+    }
+}

src/OmniSharp.ScriptCs/OmniSharp.ScriptCs.xproj → src/OmniSharp.Script/OmniSharp.Script.xproj

@@ -7,7 +7,7 @@
   <Import Project="$(VSToolsPath)\DNX\Microsoft.DNX.Props" Condition="'$(VSToolsPath)' != ''" />
   <PropertyGroup Label="Globals">
     <ProjectGuid>f52f6f60-ab29-414d-a24b-de8effba34c0</ProjectGuid>
-    <RootNamespace>OmniSharp.ScriptCs</RootNamespace>
+    <RootNamespace>OmniSharp.Script</RootNamespace>
     <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">..\..\artifacts\obj\$(MSBuildProjectName)</BaseIntermediateOutputPath>
     <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
   </PropertyGroup>

src/OmniSharp.ScriptCs/ScriptCsContext.cs → src/OmniSharp.Script/ScriptContext.cs

@@ -1,27 +1,24 @@
+using System;
 using System.Collections.Generic;
 using System.Composition;
+using System.Reflection;
 using Microsoft.CodeAnalysis;
 
-namespace OmniSharp.ScriptCs
+namespace OmniSharp.Script
 {
     [Export, Shared]
-    public class ScriptCsContext
+    public class ScriptContext
     {
         public HashSet<string> CsxFilesBeingProcessed { get; } = new HashSet<string>();
 
         // All of the followings are keyed with the file path
         // Each .csx file is wrapped into a project
         public Dictionary<string, ProjectInfo> CsxFileProjects { get; } = new Dictionary<string, ProjectInfo>();
-        public Dictionary<string, List<MetadataReference>> CsxReferences { get; } = new Dictionary<string, List<MetadataReference>>();
+        public Dictionary<string, List<PortableExecutableReference>> CsxReferences { get; } = new Dictionary<string, List<PortableExecutableReference>>();
         public Dictionary<string, List<ProjectInfo>> CsxLoadReferences { get; } = new Dictionary<string, List<ProjectInfo>>();
         public Dictionary<string, List<string>> CsxUsings { get; } = new Dictionary<string, List<string>>();
-
-        public HashSet<string> ScriptPacks { get; } = new HashSet<string>();
-
-        // Nuget and ScriptPack stuff
         public HashSet<MetadataReference> CommonReferences { get; } = new HashSet<MetadataReference>();
-        public HashSet<string> CommonUsings { get; } = new HashSet<string>();
-
+        public HashSet<string> CommonUsings { get; } = new HashSet<string> { "System" };
         public string RootPath { get; set; }
     }
 }

src/OmniSharp.ScriptCs/ScriptCsContextModel.cs → src/OmniSharp.Script/ScriptContextModel.cs

@@ -2,19 +2,18 @@
 using System.Linq;
 using OmniSharp.Roslyn.Models;
 
-namespace OmniSharp.ScriptCs
+namespace OmniSharp.Script
 {
-    public class ScriptCsContextModel
+    public class ScriptContextModel
     {
-        public ScriptCsContextModel(ScriptCsContext context)
+        public ScriptContextModel(ScriptContext context)
         {
             RootPath = context.RootPath;
             CsxFilesBeingProcessed = context.CsxFilesBeingProcessed;
             CsxFileProjects = context.CsxFileProjects.ToDictionary(x => x.Key, x => new ProjectInfoModel(x.Value));
             CsxReferences = context.CsxReferences.ToDictionary(x => x.Key, x => x.Value.Select(z => new ReferenceModel(z)));
             CsxLoadReferences = context.CsxLoadReferences.ToDictionary(x => x.Key, x => x.Value.Select(z => new ProjectInfoModel(z)));
             CsxUsings = context.CsxUsings.ToDictionary(x => x.Key, x => x.Value.AsEnumerable());
-            ScriptPacks = context.ScriptPacks;
             CommonReferences = context.CommonReferences.Select(z => new ReferenceModel(z));
             CommonUsings = context.CommonUsings;
         }
@@ -27,13 +26,8 @@ public ScriptCsContextModel(ScriptCsContext context)
         public Dictionary<string, IEnumerable<ReferenceModel>> CsxReferences { get; }
         public Dictionary<string, IEnumerable<ProjectInfoModel>> CsxLoadReferences { get; }
         public Dictionary<string, IEnumerable<string>> CsxUsings { get; }
-
-        public HashSet<string> ScriptPacks { get; }
-
-        // Nuget and ScriptPack stuff
         public IEnumerable<ReferenceModel> CommonReferences { get; }
         public IEnumerable<string> CommonUsings { get; }
-
         public string RootPath { get; set; }
     }
 }