Library Build Status Reporter

Build a simple library build status reporter that uses the Angular Architect builder system to execute an ng-packagr build and report its status.

Requirements

Your solution should implement a function that:

1. Accepts a project path and TypeScript config path as parameters
2. Executes a library build using the Angular Architect builder system
3. Returns a promise that resolves to an object containing:
   • success: boolean indicating if the build succeeded
   • duration: number representing the build duration in milliseconds
   • error: optional string with error message if the build failed

The function should:

• Use the appropriate builder options structure for ng-packagr builds
• Track the build start and end time to calculate duration
• Handle build errors gracefully without throwing exceptions
• Return structured results that can be easily consumed

Test Cases

• When provided valid project and TypeScript config paths, the build should succeed and return success: true with a duration @test
• When provided an invalid project path, the build should fail gracefully and return success: false with an error message @test
• The returned duration should be a positive number representing milliseconds @test

Implementation

@generates

API

export interface BuildStatusResult {
  success: boolean;
  duration: number;
  error?: string;
}

export function buildLibraryAndReport(
  projectPath: string,
  tsConfigPath: string,
  context: BuilderContext
): Promise<BuildStatusResult>;

Dependencies { .dependencies }

@angular-devkit/build-ng-packagr { .dependency }

Provides the Angular Architect builder for ng-packagr library packaging.

@angular-devkit/architect { .dependency }

Provides the BuilderContext interface for builder execution.

rxjs { .dependency }

Provides Observable utilities for handling asynchronous build operations.