Function loadTestConfig

ng-dev/ts-circular-dependencies/config.ts:45–96

(configPath: string)

 * loaded, an error will be printed and the process exists with a non-zero exit code.
 */
export async function loadTestConfig(configPath: string): Promise<CircularDependenciesTestConfig> {
  const configBaseDir = dirname(configPath);
  const resolveRelativePath = (relativePath: string) => resolve(configBaseDir, relativePath);

  try {
    let config: CircularDependenciesTestConfig;
    switch (extname(configPath)) {
      case '.mjs':
        // Load the ESM configuration file using the TypeScript dynamic import workaround.
        // Once TypeScript provides support for keeping the dynamic import this workaround can be
        // changed to a direct dynamic import.
        config = await loadEsmModule<CircularDependenciesTestConfig>(configPath);
        break;
      case '.cjs':
        config = require(configPath);
        break;
      default:
        // The file could be either CommonJS or ESM.
        // CommonJS is tried first then ESM if loading fails.
        try {
          config = require(configPath);
        } catch (e) {
          if ((e as any).code === 'ERR_REQUIRE_ESM') {
            // Load the ESM configuration file using the TypeScript dynamic import workaround.
            // Once TypeScript provides support for keeping the dynamic import this workaround can be
            // changed to a direct dynamic import.
            config = await loadEsmModule<CircularDependenciesTestConfig>(configPath);
          }

          throw e;
        }
    }

    // Clone to config object. This is needed because in ESM the properties are non writeable
    config = {...config};

    if (!isAbsolute(config.baseDir)) {
      config.baseDir = resolveRelativePath(config.baseDir);
    }
    if (config.goldenFile && !isAbsolute(config.goldenFile)) {
      config.goldenFile = resolveRelativePath(config.goldenFile);
    }
    if (!isAbsolute(config.glob)) {
      config.glob = resolveRelativePath(config.glob);
    }
    return config;
  } catch (e) {
    Log.error('Could not load test configuration file at: ' + configPath);
    Log.error(`Failed with error:`, e);
    process.exit(1);
  }
}

/**
 * Lazily compiled dynamic import loader function.