Add /t:UpdateRepoLineups which will automatically update the build/dependencies.targets file with appropriate versions

build/repo.targets

@@ -154,11 +154,21 @@
       Solutions="@(Solution)"
       Artifacts="@(ArtifactInfo)"
       ShippedArtifacts="@(ShippedArtifactInfo)"
+      StartGraphAt="$(BuildGraphOf)"
       Properties="Configuration=$(Configuration);BuildNumber=$(BuildNumber)">
       <Output TaskParameter="RepositoryBuildOrder" ItemName="RepositoryBuildOrder" />
     </RepoTasks.AnalyzeBuildGraph>
   </Target>
 
+  <Target Name="UpdateRepoLineups" DependsOnTargets="ResolveRepoInfo">
+    <RepoTasks.GenerateLineup
+      Artifacts="@(ArtifactInfo)"
+      Repository="%(Repository.Identity)"
+      OutputPath="$(_CloneRepositoryRoot)%(Repository.Identity)\build\dependencies.targets"
+      UseFloatingVersions="true"
+      BuildNumber="$(BuildNumber)" />
+  </Target>
+
   <Target Name="GenerateLineup" DependsOnTargets="ResolveRepoInfo">
     <Message Text="Packages that will be produced:" Importance="High" />
     <Message Text="  - %(ArtifactInfo.PackageId)/%(Version)" Importance="High" Condition="'%(ArtifactType)' == 'NuGetPackage'" />
@@ -166,7 +176,7 @@
     <RepoTasks.GenerateLineup
       Artifacts="@(ArtifactInfo)"
       OutputPath="$(ArtifactsDir)dependencies.targets"
-      UseFloatingVersions="true"
+      UseFloatingVersions="false"
       BuildNumber="$(BuildNumber)" />
   </Target>
 

build/tasks/AnalyzeBuildGraph.cs

@@ -38,6 +38,8 @@ namespace RepoTasks
         [Required]
         public string Properties { get; set; }
 
+        public string StartGraphAt { get; set; }
+
         /// <summary>
         /// The order in which to build repositories
         /// </summary>

build/tasks/GenerateLineup.cs

@@ -22,6 +22,9 @@ namespace RepoTasks
         [Required]
         public string OutputPath { get; set; }
 
+        // Can be set to filter the lists of packages when produce a list for a specific repository
+        public string Repository { get; set; }
+
         public bool UseFloatingVersions { get; set; }
 
         public string BuildNumber { get; set; }
@@ -48,7 +51,12 @@ namespace RepoTasks
                 switch (info)
                 {
                     case ArtifactInfo.Package pkg when (!pkg.IsSymbolsArtifact):
-                        packages.Add(pkg.PackageInfo);
+                        // TODO filter this list based on topological sort info
+                        if (string.IsNullOrEmpty(Repository)
+                            || !Repository.Equals(pkg.RepoName, StringComparison.OrdinalIgnoreCase))
+                        {
+                            packages.Add(pkg.PackageInfo);
+                        }
                         break;
                 }
             }
@@ -77,6 +85,7 @@ namespace RepoTasks
             };
             using (var writer = XmlWriter.Create(OutputPath, settings))
             {
+                Log.LogMessage(MessageImportance.High, $"Generate {OutputPath}");
                 doc.Save(writer);
             }
             return true;