8b5ca670ad
With the next version of the CLI we don't need to add logging for the description of the schematic as part of the schematic itself. This is because now, the CLI will print the description defined in the `migrations.json` file. See: https://github.com/angular/angular-cli/pull/15951 PR Close #33440
80 lines
2.8 KiB
TypeScript
80 lines
2.8 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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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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