fix(core): convert filePath to an absolute path before typescript resolves the module (#34001)

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## Current Behavior
<!-- This is the behavior we have today -->
TypeScript’s module resolution stop at project's root when resolving
modules.

## Expected Behavior
<!-- This is the behavior we should expect with the changes in this PR
-->
TypeScript’s module resolution will walk up to the workspace root when
resolving modules

## Changes Made
Convert the filePath to an absolute path inside findProjectFromImport
before calling resolveImportWithTypescript, because TypeScript’s module
resolution will not correctly traverse up the directory tree toward the
workspace root when given a relative path.

## Related Issue(s)
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merged. -->

Fixes #33985

Author: qing-lin-007

packages/nx/src/plugins/js/project-graph/build-dependencies/target-project-locator.spec.ts

@@ -595,6 +595,80 @@ describe('TargetProjectLocator', () => {
 
       expect(result).toEqual('child-pm-workspaces');
     });
+
+    it('should convert relative file paths to absolute paths before TypeScript module resolution', () => {
+      const typescriptModule = require('nx/src/plugins/js/utils/typescript');
+      const resolveModuleByImportSpy = jest
+        .spyOn(typescriptModule, 'resolveModuleByImport')
+        .mockReturnValue('/root/libs/proj/some-module.ts');
+
+      // Create a simple locator to test TypeScript resolution path
+      const simpleProjects: Record<string, ProjectGraphProjectNode> = {
+        proj: {
+          name: 'proj',
+          type: 'lib',
+          data: { root: 'libs/proj' },
+        },
+      };
+
+      const testLocator = new TargetProjectLocator(
+        simpleProjects,
+        {},
+        new Map()
+      );
+
+      // Test with a relative path - the method should convert it to absolute
+      // We use a unique package name that won't be found via npm resolution
+      (testLocator as any).resolveImportWithTypescript(
+        'package-that-is-installed-in-workspace-root',
+        'libs/proj/index.ts'
+      );
+
+      // Verify that resolveModuleByImport was called with an absolute path
+      // We only care that the second parameter (filePath) was converted to absolute
+      expect(resolveModuleByImportSpy).toHaveBeenCalled();
+      const [[importExpr, filePath]] = resolveModuleByImportSpy.mock.calls;
+      expect(importExpr).toBe('package-that-is-installed-in-workspace-root');
+      expect(filePath).toBe('/root/libs/proj/index.ts'); // relative path should be converted to absolute
+
+      resolveModuleByImportSpy.mockRestore();
+    });
+
+    it('should keep absolute file paths as-is for TypeScript module resolution', () => {
+      const typescriptModule = require('nx/src/plugins/js/utils/typescript');
+      const resolveModuleByImportSpy = jest
+        .spyOn(typescriptModule, 'resolveModuleByImport')
+        .mockReturnValue('/root/libs/proj/some-module.ts');
+
+      const simpleProjects: Record<string, ProjectGraphProjectNode> = {
+        proj: {
+          name: 'proj',
+          type: 'lib',
+          data: { root: 'libs/proj' },
+        },
+      };
+
+      const testLocator = new TargetProjectLocator(
+        simpleProjects,
+        {},
+        new Map()
+      );
+
+      // Test with an absolute path - it should remain absolute
+      (testLocator as any).resolveImportWithTypescript(
+        'package-that-is-installed-in-workspace-root',
+        '/root/libs/proj/index.ts'
+      );
+
+      // Verify that resolveModuleByImport was called with the same absolute path
+      // We only care that the second parameter (filePath) remained absolute
+      expect(resolveModuleByImportSpy).toHaveBeenCalled();
+      const [[importExpr, filePath]] = resolveModuleByImportSpy.mock.calls;
+      expect(importExpr).toBe('package-that-is-installed-in-workspace-root');
+      expect(filePath).toBe('/root/libs/proj/index.ts');
+
+      resolveModuleByImportSpy.mockRestore();
+    });
   });
 
   describe('findTargetProjectWithImport (without tsconfig.json)', () => {

packages/nx/src/plugins/js/project-graph/build-dependencies/target-project-locator.ts

@@ -1,5 +1,5 @@
 import { isBuiltin } from 'node:module';
-import { dirname, join, posix, relative } from 'node:path';
+import { dirname, join, posix, relative, isAbsolute } from 'node:path';
 import { clean, satisfies } from 'semver';
 import type {
   ProjectGraphExternalNode,
@@ -417,6 +417,11 @@ export class TargetProjectLocator {
     filePath: string
   ): string | undefined {
     let resolvedModule: string;
+    if (!isAbsolute(filePath)) {
+      // Convert to an absolute file path because TypeScript's module resolution won't
+      // properly walk up the directory tree (toward the workspace root) when given a relative path.
+      filePath = this.getAbsolutePath(filePath);
+    }
     const projectName = findProjectForPath(filePath, this.projectRootMappings);
     const cacheScope = projectName
       ? // fall back to the project name if the project root can't be determined