René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Angular Schematics - Apply thousands of changes on tree cause error \"Maximum call stack size exceeded\"","articleBody":"# 🐞 Bug report\r\n\r\n### Description\r\n\r\nI 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)\r\n\r\n\r\n## 🔬 Minimal Reproduction\r\n\u003cpre\u003e\u003ccode\u003e\r\nexport function createPageComponents(options: any): Rule {\r\n    return (tree: Tree, context: SchematicContext) =\u003e {\r\n        const logger = context.logger;\r\n        const directory = tree.getDir('my_path/pages');\r\n\r\n        const rules: Rule[] = [];\r\n        directory.visit((filePath) =\u003e {\r\n            if (!filePath.endsWith('config.ts')) {\r\n                return;\r\n            }\r\n\r\n            const dirPath = dirname(filePath);\r\n            const parsedPath = parseName(dirPath, basename(filePath).split('.')[0]);\r\n            options = {\r\n                path: parsedPath.path,\r\n                name: parsedPath.name\r\n            };\r\n\r\n            const templateSource = apply(\r\n                url('./files'),\r\n                [\r\n                    applyTemplates({\r\n                        ...strings,\r\n                        ...options\r\n                    }),\r\n                    move(parsedPath.path)\r\n                ]\r\n            );\r\n\r\n            const rule = mergeWith(templateSource);\r\n\r\n            rules.push(rule);\r\n        });\r\n\r\n        return chain(rules);\r\n    };\r\n}\r\n\u003c/code\u003e\u003c/pre\u003e\r\n\r\n## 🔥 Exception or Error\r\n\u003cpre\u003e\u003ccode\u003e\r\n    RangeError: Maximum call stack size exceeded\r\n        at Console.warn (\u003canonymous\u003e)\r\n        at Observable._trySubscribe (my_path\\node_modules\\rxjs\\internal\\Observable.js:55:25)\r\n        at Observable.subscribe (my_path\\node_modules\\rxjs\\internal\\Observable.js:30:22)\r\n        at MergeMapOperator.call (my_path\\node_modules\\rxjs\\internal\\operators\\mergeMap.js:39:23)\r\n        at Observable.subscribe (my_path\\node_modules\\rxjs\\internal\\Observable.js:25:31)\r\n        at MapOperator.call (my_path\\node_modules\\rxjs\\internal\\operators\\map.js:32:23)\r\n        at Observable.subscribe (my_path\\node_modules\\rxjs\\internal\\Observable.js:25:31)\r\n        at MapToOperator.call (my_path\\node_modules\\rxjs\\internal\\operators\\mapTo.js:26:23)\r\n        at Observable.subscribe (my_path\\node_modules\\rxjs\\internal\\Observable.js:25:31)\r\n        at DefaultIfEmptyOperator.call (my_path\\node_modules\\rxjs\\internal\\operators\\defaultIfEmpty.js:27:23)\r\n\u003c/code\u003e\u003c/pre\u003e\r\n\r\n\r\n## 🌍 Your Environment\r\n\u003cpre\u003e\u003ccode\u003e\r\nAngular CLI: 9.1.4\r\nNode: 10.19.0\r\nOS: win32 x64\r\n\r\nAngular: 9.1.4\r\n... animations, cli, common, compiler, compiler-cli, core, forms\r\n... language-service, platform-browser, platform-browser-dynamic\r\n... router\r\nIvy Workspace: Yes\r\n\r\nPackage                            Version\r\n------------------------------------------------------------\r\n@angular-devkit/architect          0.901.4\r\n@angular-devkit/build-angular      0.901.4\r\n@angular-devkit/build-ng-packagr   0.901.4\r\n@angular-devkit/build-optimizer    0.901.4\r\n@angular-devkit/build-webpack      0.901.4\r\n@angular-devkit/core               9.1.4\r\n@angular-devkit/schematics         9.1.7\r\n@angular-devkit/schematics-cli     0.901.7\r\n@angular/upgrade                   9.1.9\r\n@ngtools/webpack                   9.1.4\r\n@schematics/angular                9.1.4 (cli-only)\r\n@schematics/schematics             0.901.7\r\n@schematics/update                 0.901.4\r\nng-packagr                         9.1.3\r\nrxjs                               6.5.5\r\ntypescript                         3.8.3\r\nwebpack                            4.42.0\r\n\u003c/code\u003e\u003c/pre\u003e\r\n","author":{"url":"https://github.com/fatalcaron","@type":"Person","name":"fatalcaron"},"datePublished":"2020-06-03T20:01:30.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/17851/angular-cli/issues/17851"}