Function extractHmrMetatadata

packages/compiler-cli/src/ngtsc/hmr/src/metadata.ts:34–79

(
  clazz: DeclarationNode,
  reflection: ReflectionHost,
  evaluator: PartialEvaluator,
  compilerHost: Pick<ts.CompilerHost, 'getCanonicalFileName'>,
  rootDirs: readonly string[],
  definition: R3CompiledExpression,
  factory: CompileResult,
  deferBlockMetadata: R3ComponentDeferMetadata,
  classMetadata: o.Statement | null,
  debugInfo: o.Statement | null,
)

 * @param debugInfo Analyzed `setClassDebugInfo` expression, if any.
 */
export function extractHmrMetatadata(
  clazz: DeclarationNode,
  reflection: ReflectionHost,
  evaluator: PartialEvaluator,
  compilerHost: Pick<ts.CompilerHost, 'getCanonicalFileName'>,
  rootDirs: readonly string[],
  definition: R3CompiledExpression,
  factory: CompileResult,
  deferBlockMetadata: R3ComponentDeferMetadata,
  classMetadata: o.Statement | null,
  debugInfo: o.Statement | null,
): R3HmrMetadata | null {
  if (!reflection.isClass(clazz)) {
    return null;
  }

  const sourceFile = ts.getOriginalNode(clazz).getSourceFile();
  const filePath =
    getProjectRelativePath(sourceFile.fileName, rootDirs, compilerHost) ||
    compilerHost.getCanonicalFileName(sourceFile.fileName);

  const dependencies = extractHmrDependencies(
    clazz,
    definition,
    factory,
    deferBlockMetadata,
    classMetadata,
    debugInfo,
    reflection,
    evaluator,
  );

  if (dependencies === null) {
    return null;
  }

  const meta: R3HmrMetadata = {
    type: new o.WrappedNodeExpr(clazz.name),
    className: clazz.name.text,
    filePath,
    localDependencies: dependencies.local,
    namespaceDependencies: dependencies.external,
  };

  return meta;
}