Basic form of produces

src/NuGet/Roslyn.VisualStudio.Test.Utilities.nuspec

 <?xml version="1.0"?>
-<package >
+<package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
   <metadata>
     <id>Roslyn.VisualStudio.Test.Utilities</id>
     <description>Utility methods used to run Roslyn Visual Studio integration tests.</description>
@@ -19,4 +19,4 @@
   <files>
     <file src="Roslyn.VisualStudio.Test.Utilities.dll" target="lib\net46" />
   </files>
-</package>
\ No newline at end of file
+</package>

src/Tools/BuildUtil/BuildUtil/BuildUtil.nuspec

 <?xml version="1.0" encoding="utf-8"?>
-<package>
+<package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
   <metadata>
     <id>Roslyn.Build.Util</id>
     <version>0.9.4-portable</version>

src/Tools/RepoUtil/NuSpecUtil.cs

+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+
+namespace RepoUtil
+{
+    internal static class NuSpecUtil
+    {
+        internal static IEnumerable<FileName> GetNuSpecFiles(string sourcesPath)
+        {
+            return Directory
+                .EnumerateFiles(sourcesPath, "*.nuspec", SearchOption.AllDirectories)
+                .Select(x => FileName.FromFullPath(sourcesPath, x));
+        }
+
+        internal static string GetId(string nuspecFilePath)
+        {
+            var doc = XDocument.Load(nuspecFilePath);
+            var ns = XNamespace.Get("http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd");
+            var id = doc
+                .Element(ns.GetName("package"))
+                .Element(ns.GetName("metadata"))
+                .Element(ns.GetName("id"))
+                .Value;
+            return id;
+        }
+    }
+}

src/Tools/RepoUtil/ProduceUtil.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RepoUtil
+{
+    internal class ProduceUtil
+    {
+        private readonly RepoConfig _repoConfig;
+        private readonly string _sourcesPath;
+
+        internal ProduceUtil(RepoConfig repoConfig, string sourcesPath)
+        {
+            _repoConfig = repoConfig;
+            _sourcesPath = sourcesPath;
+        }
+
+        internal void Go()
+        {
+            foreach (var fileName in NuSpecUtil.GetNuSpecFiles(_sourcesPath))
+            {
+                if (_repoConfig.NuSpecExcludes.Any(x => x.IsMatch(fileName.RelativePath)))
+                {
+                    continue;
+                }
+
+                var id = NuSpecUtil.GetId(fileName.FullPath);
+                Console.WriteLine(id);
+            }
+        }
+    }
+}

src/Tools/RepoUtil/Program.cs

@@ -16,6 +16,7 @@ private enum Mode
             Verify,
             Consumes,
             Change,
+            Produces,
         }
 
         internal static readonly string[] ProjectJsonFileRelativeNames = Array.Empty<string>();
@@ -54,6 +55,12 @@ private static bool Run(string[] args)
                         util.ChangeAll();
                         return true;
                     }
+                case Mode.Produces:
+                    {
+                        var util = new ProduceUtil(repoConfig, sourcesPath);
+                        util.Go();
+                        return true;
+                    }
                 default:
                     throw new Exception("Unrecognized mode");
             }
@@ -69,6 +76,7 @@ private static void Usage()
             Console.Write(text);
         }
 
+        // TODO: don't use dashes here.
         private static bool TryParseCommandLine(string[] args, out Mode mode, out string sourcesPath)
         {
             var allGood = true;
@@ -94,6 +102,10 @@ private static bool TryParseCommandLine(string[] args, out Mode mode, out string
                         mode = Mode.Change;
                         index++;
                         break;
+                    case "-produces":
+                        mode = Mode.Produces;
+                        index++;
+                        break;
                     default:
                         Console.Write($"Option {arg} is unrecognized");
                         allGood = false;

src/Tools/RepoUtil/RepoConfig.cs

@@ -40,12 +40,18 @@ internal class RepoConfig
         internal ImmutableArray<NuGetPackage> StaticPackages { get; }
         internal ImmutableDictionary<string, ImmutableArray<string>> StaticPackagesMap { get; }
         internal ImmutableArray<string> ToolsetPackages { get; }
+        internal ImmutableArray<Regex> NuSpecExcludes { get; }
         internal GenerateData? MSBuildGenerateData { get; }
 
-        internal RepoConfig(IEnumerable<NuGetPackage> staticPackages, IEnumerable<string> toolsetPackages, GenerateData? msbuildGenerateData)
+        internal RepoConfig(
+            IEnumerable<NuGetPackage> staticPackages, 
+            IEnumerable<string> toolsetPackages, 
+            IEnumerable<Regex> nuspecExcludes,
+            GenerateData? msbuildGenerateData)
         {
             MSBuildGenerateData = msbuildGenerateData;
             StaticPackages = staticPackages.OrderBy(x => x.Name).ToImmutableArray();
+            NuSpecExcludes = nuspecExcludes.ToImmutableArray();
 
             // TODO: Validate duplicate names in the floating lists
             ToolsetPackages = toolsetPackages.OrderBy(x => x).ToImmutableArray();
@@ -104,9 +110,17 @@ internal static RepoConfig ReadFrom(string jsonFilePath)
                 msbuildGenerateData = ReadGenerateData(generateObj, "msbuild");
             }
 
+            var nuspecExcludes = new List<Regex>();
+            var nuspecExcludesProp = obj.Property("nuspecExcludes");
+            if (nuspecExcludesProp != null)
+            {
+                nuspecExcludes.AddRange(((JArray)nuspecExcludesProp.Value).Values<string>().Select(x => new Regex(x)));
+            }
+
             return new RepoConfig(
                 staticPackagesList,
                 toolsetPackages,
+                nuspecExcludes,
                 msbuildGenerateData);
         }
 

src/Tools/RepoUtil/RepoData.json

@@ -45,7 +45,7 @@
             "path": "build\\Targets\\Dependencies.props",
             "values": [
                 "Microsoft.Dia.*",
-                "System\\.*",
+                "System.*",
                 "NETStandardLibraryVersion",
                 "MicrosoftCodeAnalysisAnalyzersVersion",
                 "ManagedEsentVersion",
@@ -53,5 +53,14 @@
                 "MicrosoftCompositionVersion"
             ]
         }
-    }
+    },
+
+    "nuspecExcludes": [
+        "^packages.*",
+        "^Binaries.*",
+        "^src\\\\Samples.*",
+        "^src\\\\Dependencies.*",
+        ".*NuSpec.loc.*",
+        ".*Templates.*"
+    ]
 }

src/Tools/RepoUtil/RepoUtil.csproj

@@ -34,6 +34,8 @@
     <Compile Include="JsonTypes.cs" />
     <Compile Include="NuGetPackage.cs" />
     <Compile Include="NuGetPackageChange.cs" />
+    <Compile Include="NuSpecUtil.cs" />
+    <Compile Include="ProduceUtil.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="ProjectJsonUtil.cs" />
     <Compile Include="RepoConfig.cs" />