fix(core): hydrate root map when using cached graph

packages/nx/src/project-graph/build-project-graph.ts

@@ -72,6 +72,16 @@ export function getFileMap(): {
   }
 }
 
+export function hydrateFileMap(
+  fileMap: FileMap,
+  allWorkspaceFiles: FileData[],
+  rustReferences: NxWorkspaceFilesExternals
+) {
+  storedFileMap = fileMap;
+  storedAllWorkspaceFiles = allWorkspaceFiles;
+  storedRustReferences = rustReferences;
+}
+
 export async function buildProjectGraphUsingProjectFileMap(
   projectRootMap: Record<string, ProjectConfiguration>,
   externalNodes: Record<string, ProjectGraphExternalNode>,

packages/nx/src/project-graph/project-graph.ts

@@ -12,7 +12,10 @@ import { fileExists } from '../utils/fileutils';
 import { output } from '../utils/output';
 import { stripIndents } from '../utils/strip-indents';
 import { workspaceRoot } from '../utils/workspace-root';
-import { buildProjectGraphUsingProjectFileMap } from './build-project-graph';
+import {
+  buildProjectGraphUsingProjectFileMap,
+  hydrateFileMap,
+} from './build-project-graph';
 import {
   AggregateProjectGraphError,
   isAggregateProjectGraphError,
@@ -30,6 +33,7 @@ import {
   retrieveProjectConfigurations,
   retrieveWorkspaceFiles,
 } from './utils/retrieve-workspace-files';
+import { createProjectRootMappings } from './utils/find-project-for-path';
 
 /**
  * Synchronously reads the latest cached copy of the workspace's ProjectGraph.
@@ -239,7 +243,16 @@ export async function createProjectGraphAsync(
 ): Promise<ProjectGraph> {
   if (process.env.NX_FORCE_REUSE_CACHED_GRAPH === 'true') {
     try {
-      return readCachedProjectGraph();
+      const graph = readCachedProjectGraph();
+      const projectRootMap = Object.fromEntries(
+        Object.entries(graph.nodes).map(([project, { data }]) => [
+          data.root,
+          project,
+        ])
+      );
+      const { allWorkspaceFiles, fileMap, rustReferences } =
+        await retrieveWorkspaceFiles(workspaceRoot, projectRootMap);
+      hydrateFileMap(fileMap, allWorkspaceFiles, rustReferences);
       // If no cached graph is found, we will fall through to the normal flow
     } catch {}
   }