Fix gap in rush-serve-plugin for scaling graph

Author: dmichon-msft

rush-plugins/rush-serve-plugin/src/phasedCommandHandler.ts

@@ -125,19 +125,21 @@ export async function phasedCommandHandler(options: IPhasedCommandHandlerOptions
 
       app.use(compression({}));
 
-      const selectedProjects: ReadonlySet<RushConfigurationProject> = context.projectSelection;
+      const relevantProjects: ReadonlySet<RushConfigurationProject> = context.generateFullGraph
+        ? new Set(context.rushConfiguration.projects)
+        : expandAllDependencies(context.projectSelection);
 
       const serveConfig: RushServeConfiguration = new RushServeConfiguration();
 
       const routingRules: IRoutingRule[] = await serveConfig.loadProjectConfigsAsync(
-        selectedProjects,
+        relevantProjects,
         logger.terminal,
         globalRoutingRules
       );
 
       const { logServePath } = options;
       if (logServePath) {
-        for (const project of selectedProjects) {
+        for (const project of relevantProjects) {
           const projectLogServePath: string = getLogServePathForProject(logServePath, project.packageName);
 
           routingRules.push({
@@ -250,3 +252,13 @@ export async function phasedCommandHandler(options: IPhasedCommandHandlerOptions
     manager.hooks.onWaitingForChanges.tap(PLUGIN_NAME, logHost);
   });
 }
+
+function expandAllDependencies(projects: Iterable<RushConfigurationProject>): Set<RushConfigurationProject> {
+  const expanded: Set<RushConfigurationProject> = new Set(projects);
+  for (const project of expanded) {
+    for (const dependency of project.dependencyProjects) {
+      expanded.add(dependency);
+    }
+  }
+  return expanded;
+}