Make build output clearer (log info, don't pack irrelevant project)

src/Directory.Build.props

@@ -2,7 +2,6 @@
   <Import Project="..\Directory.Build.props" />
 
   <PropertyGroup>
-    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <EnableDefaultItems>False</EnableDefaultItems>
     <GenerateAssemblyInfo>False</GenerateAssemblyInfo>
     <IncludeBuildOutput>False</IncludeBuildOutput>

tools/DependencyUpdater/DependencyUpdater.csproj

@@ -2,6 +2,7 @@
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
     <OutputType>Library</OutputType>
+    <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <ItemGroup>

tools/DependencyUpdater/SubstituteProjectFileVariables.cs

@@ -1,4 +1,5 @@
-using Microsoft.Build.Utilities;
+using Microsoft.Build.Framework;
+using Microsoft.Build.Utilities;
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -29,14 +30,29 @@ namespace DependencyUpdater
             var outFile = Path.Combine(OutDir, Path.GetFileName(NupkgFile));
             File.Copy(NupkgFile, outFile, true);
 
+            var numProjectFiles = 0;
             using (var zipFile = ZipFile.Open(outFile, ZipArchiveMode.Update))
             {
                 foreach (var projectFile in zipFile.Entries.Where(IsProjectFile))
                 {
+                    numProjectFiles++;
                     PerformVariableSubstitutions(projectFile, substitutionsDict);
                 }
             }
 
+            if (numProjectFiles == 0)
+            {
+                Log.LogMessage(
+                    MessageImportance.High,
+                    $"No project files found in {Path.GetFileName(outFile)}, so no variables substituted.");
+            }
+            else
+            {
+                Log.LogMessage(
+                    MessageImportance.High,
+                    $"Substituted variables in {numProjectFiles} project file(s) in {Path.GetFileName(outFile)}");
+            }
+
             return true;
         }