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

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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
*/
import {checkMarkerFile, writeMarkerFile} from './packages/build_marker';
import {DependencyHost} from './packages/dependency_host';
import {DependencyResolver} from './packages/dependency_resolver';
import {EntryPointFormat} from './packages/entry_point';
import {makeEntryPointBundle} from './packages/entry_point_bundle';
import {EntryPointFinder} from './packages/entry_point_finder';
import {Transformer} from './packages/transformer';
/**
* The options to configure the ngcc compiler.
*/
export interface NgccOptions {
/** The path to the node_modules folder that contains the packages to compile. */
baseSourcePath: string;
/** A list of JavaScript bundle formats that should be compiled. */
formats: EntryPointFormat[];
/** The path to the node_modules folder where modified files should be written. */
baseTargetPath?: string;
/**
* The path, relative to `baseSourcePath` of the primary package to be compiled.
* All its dependencies will need to be compiled too.
*/
targetEntryPointPath?: string;
}
/**
* This is the main entry-point into ngcc (aNGular Compatibility Compiler).
*
* You can call this function to process one or more npm packages, to ensure
* that they are compatible with the ivy compiler (ngtsc).
*
* @param options The options telling ngcc what to compile and how.
*/
export function mainNgcc({baseSourcePath, formats, baseTargetPath = baseSourcePath,
targetEntryPointPath}: NgccOptions): void {
const transformer = new Transformer(baseSourcePath, baseTargetPath);
const host = new DependencyHost();
const resolver = new DependencyResolver(host);
const finder = new EntryPointFinder(resolver);
const {entryPoints} = finder.findEntryPoints(baseSourcePath, targetEntryPointPath);
entryPoints.forEach(entryPoint => {
// Are we compiling the Angular core?
const isCore = entryPoint.name === '@angular/core';
// We transform the d.ts typings files while transforming one of the formats.
// This variable decides with which of the available formats to do this transform.
// It is marginally faster to process via the flat file if available.
const dtsTransformFormat: EntryPointFormat = entryPoint.fesm2015 ? 'fesm2015' : 'esm2015';
formats.forEach(format => {
if (checkMarkerFile(entryPoint, format)) {
console.warn(`Skipping ${entryPoint.name} : ${format} (already built).`);
return;
}
const bundle =
makeEntryPointBundle(entryPoint, isCore, format, format === dtsTransformFormat);
if (bundle === null) {
console.warn(
`Skipping ${entryPoint.name} : ${format} (no entry point file for this format).`);
} else {
transformer.transform(entryPoint, isCore, bundle);
}
// Write the built-with-ngcc marker
writeMarkerFile(entryPoint, format);
});
});
}