refactor(compiler): store metadata of top level symbols also in summaries (#13289)

This allows a build using summaries to not need .metadata.json files at all
any more.

Part of #12787

modules/@angular/compiler-cli/src/codegen.ts

@@ -21,9 +21,7 @@ import {CompilerHost, CompilerHostContext, ModuleResolutionHostAdapter} from './
 import {PathMappedCompilerHost} from './path_mapped_compiler_host';
 import {Console} from './private_import_core';
 
-const GENERATED_FILES = /\.ngfactory\.ts$|\.ngstyle\.ts$/;
 const GENERATED_META_FILES = /\.json$/;
-const GENERATED_OR_DTS_FILES = /\.d\.ts$|\.ngfactory\.ts$|\.ngstyle\.ts$/;
 
 const PREAMBLE = `/**
  * @fileoverview This file is generated by the Angular 2 template compiler.
@@ -102,14 +100,8 @@ export class CodeGenerator {
       debug: options.debug === true,
       translations: transContent,
       i18nFormat: cliOptions.i18nFormat,
-      locale: cliOptions.locale,
-      excludeFilePattern: options.generateCodeForLibraries === false ? GENERATED_OR_DTS_FILES :
-                                                                       GENERATED_FILES
+      locale: cliOptions.locale
     });
     return new CodeGenerator(options, program, tsCompilerHost, aotCompiler, ngCompilerHost);
   }
 }
-
-export function excludeFilePattern(options: AngularCompilerOptions): RegExp {
-  return options.generateCodeForLibraries === false ? GENERATED_OR_DTS_FILES : GENERATED_FILES;
-}

modules/@angular/compiler-cli/src/compiler_host.ts

@@ -16,6 +16,8 @@ const EXT = /(\.ts|\.d\.ts|\.js|\.jsx|\.tsx)$/;
 const DTS = /\.d\.ts$/;
 const NODE_MODULES = '/node_modules/';
 const IS_GENERATED = /\.(ngfactory|ngstyle)$/;
+const GENERATED_FILES = /\.ngfactory\.ts$|\.ngstyle\.ts$/;
+const GENERATED_OR_DTS_FILES = /\.d\.ts$|\.ngfactory\.ts$|\.ngstyle\.ts$/;
 
 export interface CompilerHostContext extends ts.ModuleResolutionHost {
   readResource(fileName: string): Promise<string>;
@@ -28,6 +30,7 @@ export class CompilerHost implements AotCompilerHost {
   protected basePath: string;
   private genDir: string;
   private resolverCache = new Map<string, ModuleMetadata[]>();
+  protected resolveModuleNameHost: CompilerHostContext;
 
   constructor(
       protected program: ts.Program, protected options: AngularCompilerOptions,
@@ -38,12 +41,31 @@ export class CompilerHost implements AotCompilerHost {
 
     const genPath: string = path.relative(this.basePath, this.genDir);
     this.isGenDirChildOfRootDir = genPath === '' || !genPath.startsWith('..');
+    this.resolveModuleNameHost = Object.create(this.context);
+
+    // When calling ts.resolveModuleName,
+    // additional allow checks for .d.ts files to be done based on
+    // checks for .ngsummary.json files,
+    // so that our codegen depends on fewer inputs and requires to be called
+    // less often.
+    // This is needed as we use ts.resolveModuleName in reflector_host
+    // and it should be able to resolve summary file names.
+    this.resolveModuleNameHost.fileExists = (fileName: string): boolean => {
+      if (this.context.fileExists(fileName)) {
+        return true;
+      }
+      if (DTS.test(fileName)) {
+        const base = fileName.substring(0, fileName.length - 5);
+        return this.context.fileExists(base + '.ngsummary.json');
+      }
+      return false;
+    };
   }
 
   // We use absolute paths on disk as canonical.
   getCanonicalFileName(fileName: string): string { return fileName; }
 
-  moduleNameToFileName(m: string, containingFile: string) {
+  moduleNameToFileName(m: string, containingFile: string): string|null {
     if (!containingFile || !containingFile.length) {
       if (m.indexOf('.') === 0) {
         throw new Error('Resolution of relative paths requires a containing file.');
@@ -53,7 +75,8 @@ export class CompilerHost implements AotCompilerHost {
     }
     m = m.replace(EXT, '');
     const resolved =
-        ts.resolveModuleName(m, containingFile.replace(/\\/g, '/'), this.options, this.context)
+        ts.resolveModuleName(
+              m, containingFile.replace(/\\/g, '/'), this.options, this.resolveModuleNameHost)
             .resolvedModule;
     return resolved ? this.getCanonicalFileName(resolved.resolvedFileName) : null;
   };
@@ -213,11 +236,21 @@ export class CompilerHost implements AotCompilerHost {
 
   loadResource(filePath: string): Promise<string> { return this.context.readResource(filePath); }
 
-  loadSummary(filePath: string): string { return this.context.readFile(filePath); }
+  loadSummary(filePath: string): string|null {
+    if (this.context.fileExists(filePath)) {
+      return this.context.readFile(filePath);
+    }
+  }
 
   getOutputFileName(sourceFilePath: string): string {
     return sourceFilePath.replace(EXT, '') + '.d.ts';
   }
+
+  isSourceFile(filePath: string): boolean {
+    const excludeRegex =
+        this.options.generateCodeForLibraries === false ? GENERATED_OR_DTS_FILES : GENERATED_FILES;
+    return !excludeRegex.test(filePath);
+  }
 }
 
 export class CompilerHostContextAdapter {

modules/@angular/compiler-cli/src/extractor.ts

@@ -17,7 +17,6 @@ import * as compiler from '@angular/compiler';
 import * as tsc from '@angular/tsc-wrapped';
 import * as ts from 'typescript';
 
-import {excludeFilePattern} from './codegen';
 import {CompilerHost, ModuleResolutionHostAdapter} from './compiler_host';
 
 export class Extractor {
@@ -36,8 +35,7 @@ export class Extractor {
     if (!ngCompilerHost)
       ngCompilerHost =
           new CompilerHost(program, options, new ModuleResolutionHostAdapter(moduleResolverHost));
-    const {extractor: ngExtractor} = compiler.Extractor.create(
-        ngCompilerHost, {excludeFilePattern: excludeFilePattern(options)});
+    const {extractor: ngExtractor} = compiler.Extractor.create(ngCompilerHost);
     return new Extractor(ngExtractor, ngCompilerHost, program);
   }
 }

modules/@angular/compiler-cli/src/ngtools_api.ts

@@ -13,7 +13,7 @@
  * something else.
  */
 
-import {AotCompilerHost, StaticReflector} from '@angular/compiler';
+import {AotCompilerHost, AotSummaryResolver, StaticReflector, StaticSymbolCache, StaticSymbolResolver} from '@angular/compiler';
 import {AngularCompilerOptions, NgcCliOptions} from '@angular/tsc-wrapped';
 import * as ts from 'typescript';
 
@@ -111,7 +111,10 @@ export class NgTools_InternalApi_NG_2 {
         new PathMappedCompilerHost(program, angularCompilerOptions, moduleResolutionHost) :
         new CompilerHost(program, angularCompilerOptions, moduleResolutionHost);
 
-    const staticReflector = new StaticReflector(ngCompilerHost);
+    const symbolCache = new StaticSymbolCache();
+    const summaryResolver = new AotSummaryResolver(ngCompilerHost, symbolCache);
+    const symbolResolver = new StaticSymbolResolver(ngCompilerHost, symbolCache, summaryResolver);
+    const staticReflector = new StaticReflector(symbolResolver);
     const routeMap = listLazyRoutesOfModule(options.entryModule, ngCompilerHost, staticReflector);
 
     return Object.keys(routeMap).reduce(