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184 lines (162 loc) · 7.52 KB
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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
/**
* Transform template html and css into executable code.
* Intended to be used in a build step.
*/
import * as compiler from '@angular/compiler';
import {ViewEncapsulation} from '@angular/core';
import {AngularCompilerOptions, NgcCliOptions} from '@angular/tsc-wrapped';
import {readFileSync} from 'fs';
import * as path from 'path';
import * as ts from 'typescript';
import {PathMappedReflectorHost} from './path_mapped_reflector_host';
import {Console} from './private_import_core';
import {ReflectorHost, ReflectorHostContext} from './reflector_host';
import {StaticAndDynamicReflectionCapabilities} from './static_reflection_capabilities';
import {StaticReflector, StaticReflectorHost, StaticSymbol} from './static_reflector';
const GENERATED_FILES = /\.ngfactory\.ts$|\.css\.ts$|\.css\.shim\.ts$/;
const GENERATED_OR_DTS_FILES = /\.d\.ts$|\.ngfactory\.ts$|\.css\.ts$|\.css\.shim\.ts$/;
const PREAMBLE = `/**
* @fileoverview This file is generated by the Angular 2 template compiler.
* Do not edit.
* @suppress {suspiciousCode,uselessCode,missingProperties}
*/
/* tslint:disable */
`;
export class CodeGenerator {
constructor(
private options: AngularCompilerOptions, private program: ts.Program,
public host: ts.CompilerHost, private staticReflector: StaticReflector,
private compiler: compiler.OfflineCompiler, private reflectorHost: StaticReflectorHost) {}
// Write codegen in a directory structure matching the sources.
private calculateEmitPath(filePath: string): string {
let root = this.options.basePath;
for (const eachRootDir of this.options.rootDirs || []) {
if (this.options.trace) {
console.error(`Check if ${filePath} is under rootDirs element ${eachRootDir}`);
}
if (path.relative(eachRootDir, filePath).indexOf('.') !== 0) {
root = eachRootDir;
}
}
// transplant the codegen path to be inside the `genDir`
let relativePath: string = path.relative(root, filePath);
while (relativePath.startsWith('..' + path.sep)) {
// Strip out any `..` path such as: `../node_modules/@foo` as we want to put everything
// into `genDir`.
relativePath = relativePath.substr(3);
}
return path.join(this.options.genDir, relativePath);
}
codegen(options: {transitiveModules: boolean}): Promise<any> {
const staticSymbols =
extractProgramSymbols(this.program, this.staticReflector, this.reflectorHost, this.options);
return this.compiler.compileModules(staticSymbols, options).then(generatedModules => {
generatedModules.forEach(generatedModule => {
const sourceFile = this.program.getSourceFile(generatedModule.fileUrl);
const emitPath = this.calculateEmitPath(generatedModule.moduleUrl);
this.host.writeFile(
emitPath, PREAMBLE + generatedModule.source, false, () => {}, [sourceFile]);
});
});
}
static create(
options: AngularCompilerOptions, cliOptions: NgcCliOptions, program: ts.Program,
compilerHost: ts.CompilerHost, reflectorHostContext?: ReflectorHostContext,
resourceLoader?: compiler.ResourceLoader, reflectorHost?: ReflectorHost): CodeGenerator {
resourceLoader = resourceLoader || {
get: (s: string) => {
if (!compilerHost.fileExists(s)) {
// TODO: We should really have a test for error cases like this!
throw new Error(`Compilation failed. Resource file not found: ${s}`);
}
return Promise.resolve(compilerHost.readFile(s));
}
};
const transFile = cliOptions.i18nFile;
const locale = cliOptions.locale;
let transContent: string = '';
if (transFile) {
if (!locale) {
throw new Error(
`The translation file (${transFile}) locale must be provided. Use the --locale option.`);
}
transContent = readFileSync(transFile, 'utf8');
}
const urlResolver: compiler.UrlResolver = compiler.createOfflineCompileUrlResolver();
if (!reflectorHost) {
const usePathMapping = !!options.rootDirs && options.rootDirs.length > 0;
reflectorHost = usePathMapping ?
new PathMappedReflectorHost(program, compilerHost, options, reflectorHostContext) :
new ReflectorHost(program, compilerHost, options, reflectorHostContext);
}
const staticReflector = new StaticReflector(reflectorHost);
StaticAndDynamicReflectionCapabilities.install(staticReflector);
const htmlParser =
new compiler.I18NHtmlParser(new compiler.HtmlParser(), transContent, cliOptions.i18nFormat);
const config = new compiler.CompilerConfig({
genDebugInfo: options.debug === true,
defaultEncapsulation: ViewEncapsulation.Emulated,
logBindingUpdate: false,
useJit: false
});
const normalizer =
new compiler.DirectiveNormalizer(resourceLoader, urlResolver, htmlParser, config);
const expressionParser = new compiler.Parser(new compiler.Lexer());
const elementSchemaRegistry = new compiler.DomElementSchemaRegistry();
const console = new Console();
const tmplParser = new compiler.TemplateParser(
expressionParser, elementSchemaRegistry, htmlParser, console, []);
const resolver = new compiler.CompileMetadataResolver(
new compiler.NgModuleResolver(staticReflector),
new compiler.DirectiveResolver(staticReflector), new compiler.PipeResolver(staticReflector),
elementSchemaRegistry, normalizer, staticReflector);
// TODO(vicb): do not pass cliOptions.i18nFormat here
const offlineCompiler = new compiler.OfflineCompiler(
resolver, tmplParser, new compiler.StyleCompiler(urlResolver),
new compiler.ViewCompiler(config, elementSchemaRegistry),
new compiler.DirectiveWrapperCompiler(
config, expressionParser, elementSchemaRegistry, console),
new compiler.NgModuleCompiler(), new compiler.TypeScriptEmitter(reflectorHost),
cliOptions.locale, cliOptions.i18nFormat,
new compiler.AnimationParser(elementSchemaRegistry));
return new CodeGenerator(
options, program, compilerHost, staticReflector, offlineCompiler, reflectorHost);
}
}
export function extractProgramSymbols(
program: ts.Program, staticReflector: StaticReflector, reflectorHost: StaticReflectorHost,
options: AngularCompilerOptions): StaticSymbol[] {
// Compare with false since the default should be true
const skipFileNames =
options.generateCodeForLibraries === false ? GENERATED_OR_DTS_FILES : GENERATED_FILES;
const staticSymbols: StaticSymbol[] = [];
program.getSourceFiles()
.filter(sourceFile => !skipFileNames.test(sourceFile.fileName))
.forEach(sourceFile => {
const absSrcPath = reflectorHost.getCanonicalFileName(sourceFile.fileName);
const moduleMetadata = staticReflector.getModuleMetadata(absSrcPath);
if (!moduleMetadata) {
console.warn(`WARNING: no metadata found for ${absSrcPath}`);
return;
}
const metadata = moduleMetadata['metadata'];
if (!metadata) {
return;
}
for (const symbol of Object.keys(metadata)) {
if (metadata[symbol] && metadata[symbol].__symbolic == 'error') {
// Ignore symbols that are only included to record error information.
continue;
}
staticSymbols.push(reflectorHost.findDeclaration(absSrcPath, symbol, absSrcPath));
}
});
return staticSymbols;
}