From dc7b2d088349eeb877adef2ed7f3f63fb6afc31e Mon Sep 17 00:00:00 2001
From: Nate McMaster <nate.mcmaster@microsoft.com>
Date: Fri, 28 Jul 2017 16:15:49 -0700
Subject: [PATCH] Respect ExcludeSolutions when calculating the build graph

---
 build/repo.targets                               | 16 +++++++++++-----
 .../BuildGraph/DependencyGraphSpecProvider.cs    |  6 ++++++
 build/tasks/BuildGraph/Repository.cs             |  5 +++++
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/build/repo.targets b/build/repo.targets
index 4c14089f27..aeed856381 100644
--- a/build/repo.targets
+++ b/build/repo.targets
@@ -110,13 +110,19 @@
      DependsOnTargets="_PrepareRepositories;_CreateRepositoriesListWithCommits;_UpdateNuGetConfig;_GenerateBuildGraph;_BuildRepositories" />
 
   <Target Name="_PrepareRestoreGraphSpecs" DependsOnTargets="_PrepareRepositories">
-    <ItemGroup>
-      <Solution Include="$(_CloneRepositoryRoot)%(Repository.Identity)\*.sln">
-        <Repository>%(Repository.Identity)</Repository>
-      </Solution>
 
+    <MSBuild Projects="$(MSBuildProjectFullPath)"
+             Targets="ResolveSolutions"
+             Properties="RepositoryRoot=$(_CloneRepositoryRoot)%(Repository.Identity)\"
+             ContinueOnError="WarnAndContinue">
+      <Output TaskParameter="TargetOutputs" ItemName="Solution" />
+    </MSBuild>
+
+    <Error Text="No solutions were found in '$(_CloneRepositoryRoot)'" Condition="@(Solution->Count()) == 0" />
+
+    <ItemGroup>
       <Solution>
-        <AdditionalProperties>RestoreGraphOutputPath=$(_RestoreGraphSpecsDirectory)%(Solution.Repository)\%(Solution.FileName)%(Solution.Extension).json</AdditionalProperties>
+        <AdditionalProperties>RestoreGraphOutputPath=$(_RestoreGraphSpecsDirectory)$([System.IO.Path]::GetFileName('$([System.IO.Path]::GetDirectoryName(%(FullPath)))'))\%(Solution.FileName)%(Solution.Extension).json</AdditionalProperties>
       </Solution>
 
       <GraphSpecInputs Include="
diff --git a/build/tasks/BuildGraph/DependencyGraphSpecProvider.cs b/build/tasks/BuildGraph/DependencyGraphSpecProvider.cs
index 805033c1c2..b4b73dc27d 100644
--- a/build/tasks/BuildGraph/DependencyGraphSpecProvider.cs
+++ b/build/tasks/BuildGraph/DependencyGraphSpecProvider.cs
@@ -15,6 +15,12 @@ namespace RepoTools.BuildGraph
         public DependencyGraphSpec GetDependencyGraphSpec(string repositoryName, string solutionPath)
         {
             var outputFile = Path.Combine(_packageSpecDirectory, repositoryName, Path.GetFileName(solutionPath) + ".json");
+
+            if (!File.Exists(outputFile))
+            {
+                return null;
+            }
+
             return DependencyGraphSpec.Load(outputFile);
         }
     }
diff --git a/build/tasks/BuildGraph/Repository.cs b/build/tasks/BuildGraph/Repository.cs
index c71ade8555..6c5f9964f0 100644
--- a/build/tasks/BuildGraph/Repository.cs
+++ b/build/tasks/BuildGraph/Repository.cs
@@ -56,6 +56,11 @@ namespace RepoTools.BuildGraph
             foreach (var file in solutionFiles)
             {
                 var spec = provider.GetDependencyGraphSpec(name, file);
+                if (spec == null)
+                {
+                    continue;
+                }
+
                 var projects = spec.Projects.OrderBy(p => p.RestoreMetadata.ProjectStyle == ProjectStyle.PackageReference ? 0 : 1);
                 foreach (var specProject in projects)
                 {