[ Widget Preview ] Fix crash when widget_preview_scaffold/.dart_tool doesn't exist
#178662
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…` doesn't exist If the `.dart_tool/widget_preview_scaffold/.dart_tool/` directory wasn't created during the initial run of `flutter widget-preview start` due to the command being interrupted or `pub` being disabled, `flutter widget-preview start` would crash due to the `package_config.json` logic walking up the directory structure looking for the nearest `package_config.json`. This would point to the parent project's `package_config.json`, which would not be compatible with the widget preview scaffold project. Fixes #178660
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This pull request fixes a crash in flutter widget-preview start when the scaffold's .dart_tool directory is missing. The changes ensure that pub get is run for the scaffold project if needed. The logic is sound and a good regression test is added. I've suggested a small refactoring to reduce code duplication in preview_pubspec_builder.dart.
packages/flutter_tools/lib/src/widget_preview/preview_pubspec_builder.dart
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….dart_tool` doesn't exist (flutter/flutter#178662)
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…#10455) Manual roll Flutter from 9b5ad8031646 to cc14ef529014 (143 revisions) Manual roll requested by [email protected] flutter/flutter@9b5ad80...cc14ef5 2025-11-17 [email protected] [ Widget Preview ] Fix crash when `widget_preview_scaffold/.dart_tool` doesn't exist (flutter/flutter#178662) 2025-11-17 [email protected] Dev proxy correctly copy query parameters from original request (flutter/flutter#178162) 2025-11-17 [email protected] Roll Dart SDK from ac5942fe75d0 to cf94632d94a1 (1 revision) (flutter/flutter#178664) 2025-11-17 [email protected] Improve code quality `FlutterViewTest.java` (flutter/flutter#178594) 2025-11-17 [email protected] Roll customer tests (flutter/flutter#178652) 2025-11-17 [email protected] Corrects invalid Flutter wiki links (flutter/flutter#178158) 2025-11-17 [email protected] Fix LateInitializationError in didChangeTextScaleFactor code example. (flutter/flutter#178375) 2025-11-17 [email protected] Roll Skia from d877de9fc23e to 84c83c0dfb4a (3 revisions) (flutter/flutter#178653) 2025-11-17 [email protected] Small refactor in `DartMessenger.java` to use method reference (flutter/flutter#178584) 2025-11-17 [email protected] fix typos in `PlatformChannel.java` docs (flutter/flutter#178589) 2025-11-17 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Enable UIScene Migration and update create templates (#178328)" (flutter/flutter#178665) 2025-11-17 [email protected] Remove unnecessary `String.valueOf` in `ListenableEditingState.java` (flutter/flutter#178597) 2025-11-17 [email protected] Update `Metadata.java` to use `getBytes` in a static context (flutter/flutter#178587) 2025-11-17 [email protected] Reduce the data copying in CanvasPath related to the SkPathBuilder API migration (flutter/flutter#178512) 2025-11-17 [email protected] Roll Packages from 799b62c to ce44ebb (10 revisions) (flutter/flutter#178649) 2025-11-17 [email protected] Enable UIScene Migration and update create templates (flutter/flutter#178328) 2025-11-17 [email protected] Roll Skia from 5fb44352b232 to d877de9fc23e (1 revision) (flutter/flutter#178647) 2025-11-17 [email protected] Revert "Separate copying dsym into its own target (#178261)" (flutter/flutter#178545) 2025-11-17 [email protected] [web] Reduce Skwasm test shards to 2 (flutter/flutter#178239) 2025-11-17 [email protected] Roll Dart SDK from ee793f732959 to ac5942fe75d0 (1 revision) (flutter/flutter#178637) 2025-11-17 [email protected] Roll Skia from b30859d35b89 to 5fb44352b232 (1 revision) (flutter/flutter#178636) 2025-11-17 [email protected] Roll Skia from 5b7f8f61528e to b30859d35b89 (1 revision) (flutter/flutter#178634) 2025-11-17 [email protected] Roll Skia from aad0515710a9 to 5b7f8f61528e (7 revisions) (flutter/flutter#178631) 2025-11-17 [email protected] Roll Skia from 761e1fe67e15 to aad0515710a9 (1 revision) (flutter/flutter#178624) 2025-11-16 [email protected] Roll Skia from 5f9157717150 to 761e1fe67e15 (1 revision) (flutter/flutter#178614) 2025-11-16 [email protected] Roll Skia from 1b435b65e754 to 5f9157717150 (1 revision) (flutter/flutter#178612) 2025-11-16 [email protected] Roll Dart SDK from dffc5f3f9be6 to ee793f732959 (1 revision) (flutter/flutter#178607) 2025-11-16 [email protected] Roll Skia from ce2168cf2b6c to 1b435b65e754 (1 revision) (flutter/flutter#178604) 2025-11-15 [email protected] Roll Dart SDK from 50eca21d80c4 to dffc5f3f9be6 (1 revision) (flutter/flutter#178603) 2025-11-15 [email protected] [macOS] Implement dialog window (flutter/flutter#176893) 2025-11-15 [email protected] Roll Dart SDK from f6f88ed5e5a1 to 50eca21d80c4 (1 revision) (flutter/flutter#178599) 2025-11-15 [email protected] Roll Dart SDK from 9eda5b525ca9 to f6f88ed5e5a1 (1 revision) (flutter/flutter#178576) 2025-11-15 [email protected] Roll Skia from c5c3399b3a84 to ce2168cf2b6c (1 revision) (flutter/flutter#178577) 2025-11-15 [email protected] Add a `RepeatingAnimationBuilder` API (flutter/flutter#174014) 2025-11-15 [email protected] Roll Dart SDK from 486be9c17488 to 9eda5b525ca9 (1 revision) (flutter/flutter#178562) 2025-11-15 [email protected] Roll Skia from f5d29842bf45 to c5c3399b3a84 (1 revision) (flutter/flutter#178559) 2025-11-14 [email protected] Roll Skia from f58b1b8052a2 to f5d29842bf45 (3 revisions) (flutter/flutter#178556) 2025-11-14 [email protected] Roll Dart SDK from c6c5f6c169a9 to 486be9c17488 (1 revision) (flutter/flutter#178555) 2025-11-14 [email protected] [ Widget Preview ] Gracefully handle unexpected analysis context disposal (flutter/flutter#178550) 2025-11-14 [email protected] docs: Add documentation for running devicelab tests in a PR (flutter/flutter#178554) 2025-11-14 [email protected] [Reland] Generate new Gradle lockfiles and delete ignore files (flutter/flutter#178553) 2025-11-14 [email protected] Fix crash when doing a SaveLayer under a non-invertible transform (flutter/flutter#178507) 2025-11-14 [email protected] [Reland] Generate ignore lockfiles and Update Android Embedder Dependencies (flutter/flutter#178538) 2025-11-14 [email protected] Roll Skia from 4c02d9fc79c1 to f58b1b8052a2 (1 revision) (flutter/flutter#178543) ...
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Nov 22, 2025
…` doesn't exist (flutter#178662) If the `.dart_tool/widget_preview_scaffold/.dart_tool/` directory wasn't created during the initial run of `flutter widget-preview start` due to the command being interrupted or `pub` being disabled, `flutter widget-preview start` would crash due to the `package_config.json` logic walking up the directory structure looking for the nearest `package_config.json`. This would point to the parent project's `package_config.json`, which would not be compatible with the widget preview scaffold project. Fixes flutter#178660 and flutter#177655
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…` doesn't exist (flutter#178662) If the `.dart_tool/widget_preview_scaffold/.dart_tool/` directory wasn't created during the initial run of `flutter widget-preview start` due to the command being interrupted or `pub` being disabled, `flutter widget-preview start` would crash due to the `package_config.json` logic walking up the directory structure looking for the nearest `package_config.json`. This would point to the parent project's `package_config.json`, which would not be compatible with the widget preview scaffold project. Fixes flutter#178660 and flutter#177655
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Nov 24, 2025
…` doesn't exist (flutter#178662) If the `.dart_tool/widget_preview_scaffold/.dart_tool/` directory wasn't created during the initial run of `flutter widget-preview start` due to the command being interrupted or `pub` being disabled, `flutter widget-preview start` would crash due to the `package_config.json` logic walking up the directory structure looking for the nearest `package_config.json`. This would point to the parent project's `package_config.json`, which would not be compatible with the widget preview scaffold project. Fixes flutter#178660 and flutter#177655
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Dec 2, 2025
…` doesn't exist (flutter#178662) If the `.dart_tool/widget_preview_scaffold/.dart_tool/` directory wasn't created during the initial run of `flutter widget-preview start` due to the command being interrupted or `pub` being disabled, `flutter widget-preview start` would crash due to the `package_config.json` logic walking up the directory structure looking for the nearest `package_config.json`. This would point to the parent project's `package_config.json`, which would not be compatible with the widget preview scaffold project. Fixes flutter#178660 and flutter#177655
reidbaker
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Dec 10, 2025
…` doesn't exist (flutter#178662) If the `.dart_tool/widget_preview_scaffold/.dart_tool/` directory wasn't created during the initial run of `flutter widget-preview start` due to the command being interrupted or `pub` being disabled, `flutter widget-preview start` would crash due to the `package_config.json` logic walking up the directory structure looking for the nearest `package_config.json`. This would point to the parent project's `package_config.json`, which would not be compatible with the widget preview scaffold project. Fixes flutter#178660 and flutter#177655
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If the
.dart_tool/widget_preview_scaffold/.dart_tool/directory wasn't created during the initial run offlutter widget-preview startdue to the command being interrupted orpubbeing disabled,flutter widget-preview startwould crash due to thepackage_config.jsonlogic walking up the directory structure looking for the nearestpackage_config.json. This would point to the parent project'spackage_config.json, which would not be compatible with the widget preview scaffold project.Fixes #178660 and #177655