Function compileDirective

packages/core/src/render3/jit/directive.ts:295–323

(type: Type<any>, directive: Directive | null)

 * will resolve when compilation completes and the directive becomes usable.
 */
export function compileDirective(type: Type<any>, directive: Directive | null): void {
  let ngDirectiveDef: any = null;

  addDirectiveFactoryDef(type, directive || {});

  Object.defineProperty(type, NG_DIR_DEF, {
    get: () => {
      if (ngDirectiveDef === null) {
        // `directive` can be null in the case of abstract directives as a base class
        // that use `@Directive()` with no selector. In that case, pass empty object to the
        // `directiveMetadata` function instead of null.
        const meta = getDirectiveMetadata(type, directive || {});
        const compiler = getCompilerFacade({
          usage: JitCompilerUsage.Decorator,
          kind: 'directive',
          type,
        });
        ngDirectiveDef = compiler.compileDirective(
          angularCoreEnv,
          meta.sourceMapUrl,
          meta.metadata,
        );
      }
      return ngDirectiveDef;
    },
    // Make the property configurable in dev mode to allow overriding in tests
    configurable: !!ngDevMode,
  });
}

function getDirectiveMetadata(type: Type<any>, metadata: Directive) {
  const name = type && type.name;