refactor(ivy): ngcc - simplify Transformer.transform API (#29092)

By ensuring that EntryPointBundle contains everything that `Transformer.transform()`
needs to do its work, we can simplify its signature.

PR Close #29092

packages/compiler-cli/ngcc/src/main.ts

@@ -80,7 +80,7 @@ export function mainNgcc({baseSourcePath, targetEntryPointPath, propertiesToCons
             compiledFormats.size === 0);
         if (bundle) {
           console.warn(`Compiling ${entryPoint.name} : ${property} as ${format}`);
-          transformer.transform(entryPoint, isCore, bundle);
+          transformer.transform(bundle);
           compiledFormats.add(formatPath);
         } else {
           console.warn(

packages/compiler-cli/ngcc/src/packages/entry_point_bundle.ts

@@ -20,6 +20,7 @@ import {EntryPointFormat} from './entry_point';
  */
 export interface EntryPointBundle {
   format: EntryPointFormat;
+  isCore: boolean;
   isFlatCore: boolean;
   rootDirs: AbsoluteFsPath[];
   src: BundleProgram;
@@ -56,5 +57,5 @@ export function makeEntryPointBundle(
       null;
   const isFlatCore = isCore && src.r3SymbolsFile === null;
 
-  return {format, rootDirs, isFlatCore, src, dts};
+  return {format, rootDirs, isCore, isFlatCore, src, dts};
 }

packages/compiler-cli/ngcc/src/packages/transformer.ts

@@ -55,7 +55,8 @@ export class Transformer {
    * Transform the source (and typings) files of a bundle.
    * @param bundle the bundle to transform.
    */
-  transform(entryPoint: EntryPoint, isCore: boolean, bundle: EntryPointBundle): void {
+  transform(bundle: EntryPointBundle): void {
+    const isCore = bundle.isCore;
     const reflectionHost = this.getHost(isCore, bundle);
 
     // Parse and analyze the files.