85 lines
3.1 KiB
TypeScript
85 lines
3.1 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {JsonParseMode, parseJsonAst} from '@angular-devkit/core';
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import {Rule, SchematicContext, SchematicsException, Tree} from '@angular-devkit/schematics';
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import {NodePackageInstallTask} from '@angular-devkit/schematics/tasks';
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import {appendPropertyInAstObject, findPropertyInAstObject, insertPropertyInAstObjectInOrder} from '@schematics/angular/utility/json-utils';
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/**
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* Runs the ngcc postinstall migration for the current CLI workspace.
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*/
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export default function(): Rule {
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return (tree: Tree, context: SchematicContext) => {
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context.logger.info('------ ngcc postinstall migration ------');
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context.logger.info('This migration adds an ngcc invocation to npm/yarn\'s ');
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context.logger.info('postinstall script. See more info here: ');
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context.logger.info('https://v9.angular.io/guide/migration-ngcc');
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addPackageJsonScript(
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tree, 'postinstall',
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'ngcc --properties es2015 browser module main --first-only --create-ivy-entry-points');
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context.addTask(new NodePackageInstallTask());
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};
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}
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function addPackageJsonScript(tree: Tree, scriptName: string, script: string): void {
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const pkgJsonPath = '/package.json';
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// Read package.json and turn it into an AST.
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const buffer = tree.read(pkgJsonPath);
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if (buffer === null) {
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throw new SchematicsException('Could not read package.json.');
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}
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const content = buffer.toString();
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const packageJsonAst = parseJsonAst(content, JsonParseMode.Strict);
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if (packageJsonAst.kind != 'object') {
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throw new SchematicsException('Invalid package.json. Was expecting an object.');
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}
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// Begin recording changes.
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const recorder = tree.beginUpdate(pkgJsonPath);
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const scriptsNode = findPropertyInAstObject(packageJsonAst, 'scripts');
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if (!scriptsNode) {
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// Haven't found the scripts key, add it to the root of the package.json.
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appendPropertyInAstObject(
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recorder, packageJsonAst, 'scripts', {
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[scriptName]: script,
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},
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2);
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} else if (scriptsNode.kind === 'object') {
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// Check if the script is already there.
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const scriptNode = findPropertyInAstObject(scriptsNode, scriptName);
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if (!scriptNode) {
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// Script not found, add it.
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insertPropertyInAstObjectInOrder(recorder, scriptsNode, scriptName, script, 4);
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} else {
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// Script found, prepend the new script with &&.
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const currentScript = scriptNode.value;
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if (typeof currentScript == 'string') {
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// Only add script if there's no ngcc call there already.
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if (!currentScript.includes('ngcc')) {
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const {start, end} = scriptNode;
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recorder.remove(start.offset, end.offset - start.offset);
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recorder.insertRight(start.offset, JSON.stringify(`${script} && ${currentScript}`));
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}
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} else {
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throw new SchematicsException(
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'Invalid postinstall script in package.json. Was expecting a string.');
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}
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}
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}
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// Write the changes.
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tree.commitUpdate(recorder);
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}
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