Angular Schematics - Apply thousands of changes on tree cause error "Maximum call stack size exceeded"

Bắt đầu tại điểm vào createPageComponents trong bản tái hiện, đặc biệt là mảng rules và chain(rules), rồi tái hiện lỗi với hơn 1.000 quy tắc Schematics. Đọc đường dẫn thực thi của Angular Schematics cùng với stack trace của RxJS được hiển thị trong báo cáo. Hoàn thành khi có thể áp dụng tập hợp lớn các thay đổi đối với page component mà không gặp lỗi maximum call stack.

🐞 Bug report

Description

I use Angular Schematics to migrate from AngularJs to Angular. The application is a large one with thousands of page. I try to create a component for each page based on a template. When I try to create the component on a smaller project like 200 pages it's working but when I fall on a large one with more than 1000 pages (1000 schematics rules)

🔬 Minimal Reproduction

export function createPageComponents(options: any): Rule {
    return (tree: Tree, context: SchematicContext) => {
        const logger = context.logger;
        const directory = tree.getDir('my_path/pages');

        const rules: Rule[] = [];
        directory.visit((filePath) => {
            if (!filePath.endsWith('config.ts')) {
                return;
            }

            const dirPath = dirname(filePath);
            const parsedPath = parseName(dirPath, basename(filePath).split('.')[0]);
            options = {
                path: parsedPath.path,
                name: parsedPath.name
            };

            const templateSource = apply(
                url('./files'),
                [
                    applyTemplates({
                        ...strings,
                        ...options
                    }),
                    move(parsedPath.path)
                ]
            );

            const rule = mergeWith(templateSource);

            rules.push(rule);
        });

        return chain(rules);
    };
}

🔥 Exception or Error

    RangeError: Maximum call stack size exceeded
        at Console.warn ()
        at Observable._trySubscribe (my_path\node_modules\rxjs\internal\Observable.js:55:25)
        at Observable.subscribe (my_path\node_modules\rxjs\internal\Observable.js:30:22)
        at MergeMapOperator.call (my_path\node_modules\rxjs\internal\operators\mergeMap.js:39:23)
        at Observable.subscribe (my_path\node_modules\rxjs\internal\Observable.js:25:31)
        at MapOperator.call (my_path\node_modules\rxjs\internal\operators\map.js:32:23)
        at Observable.subscribe (my_path\node_modules\rxjs\internal\Observable.js:25:31)
        at MapToOperator.call (my_path\node_modules\rxjs\internal\operators\mapTo.js:26:23)
        at Observable.subscribe (my_path\node_modules\rxjs\internal\Observable.js:25:31)
        at DefaultIfEmptyOperator.call (my_path\node_modules\rxjs\internal\operators\defaultIfEmpty.js:27:23)

🌍 Your Environment

Angular CLI: 9.1.4
Node: 10.19.0
OS: win32 x64

Angular: 9.1.4
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router
Ivy Workspace: Yes

Package                            Version
------------------------------------------------------------
@angular-devkit/architect          0.901.4
@angular-devkit/build-angular      0.901.4
@angular-devkit/build-ng-packagr   0.901.4
@angular-devkit/build-optimizer    0.901.4
@angular-devkit/build-webpack      0.901.4
@angular-devkit/core               9.1.4
@angular-devkit/schematics         9.1.7
@angular-devkit/schematics-cli     0.901.7
@angular/upgrade                   9.1.9
@ngtools/webpack                   9.1.4
@schematics/angular                9.1.4 (cli-only)
@schematics/schematics             0.901.7
@schematics/update                 0.901.4
ng-packagr                         9.1.3
rxjs                               6.5.5
typescript                         3.8.3
webpack                            4.42.0