@schematics/angular
Version:
Schematics specific to Angular
65 lines (64 loc) • 2.56 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/**
* @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
*/
const core_1 = require("@angular-devkit/core");
const schematics_1 = require("@angular-devkit/schematics");
const tasks_1 = require("@angular-devkit/schematics/tasks");
const dependencies_1 = require("../../utility/dependencies");
const json_utils_1 = require("../../utility/json-utils");
const latest_versions_1 = require("../../utility/latest-versions");
function typeScriptHelpersRule() {
return schematics_1.chain([
_updateTsConfig(),
(tree, context) => {
const existing = dependencies_1.getPackageJsonDependency(tree, 'tslib');
const type = existing ? existing.type : dependencies_1.NodeDependencyType.Default;
dependencies_1.addPackageJsonDependency(tree, {
type,
name: 'tslib',
version: latest_versions_1.latestVersions.TsLib,
overwrite: true,
});
context.addTask(new tasks_1.NodePackageInstallTask());
},
]);
}
exports.typeScriptHelpersRule = typeScriptHelpersRule;
function _updateTsConfig() {
return (host) => {
const tsConfigPath = '/tsconfig.json';
const buffer = host.read(tsConfigPath);
if (!buffer) {
return host;
}
const tsCfgAst = core_1.parseJsonAst(buffer.toString(), core_1.JsonParseMode.Loose);
if (tsCfgAst.kind !== 'object') {
return host;
}
const compilerOptions = json_utils_1.findPropertyInAstObject(tsCfgAst, 'compilerOptions');
if (!compilerOptions || compilerOptions.kind !== 'object') {
return host;
}
const importHelpers = json_utils_1.findPropertyInAstObject(compilerOptions, 'importHelpers');
if (importHelpers && importHelpers.value === true) {
return host;
}
const recorder = host.beginUpdate(tsConfigPath);
if (importHelpers) {
const { start, end } = importHelpers;
recorder.remove(start.offset, end.offset - start.offset);
recorder.insertLeft(start.offset, 'true');
}
else {
json_utils_1.insertPropertyInAstObjectInOrder(recorder, compilerOptions, 'importHelpers', true, 4);
}
host.commitUpdate(recorder);
return host;
};
}