Add a way to check links and redirects

README.md

@@ -258,3 +258,39 @@ If new sample apps have been added, update `_data/catalog/widget.json`. The entr
 ```
 
 The `sample_page.dart` app will print a list of all of the `"sample"` properties that should appear in the `widget.json` file.
+
+## Preventing broken links
+
+Some form of broken links prevention is done automatically by `rake checklinks`
+on every commit (through `tool/travis.sh`). But this won't see any Firebase 
+redirects (`rake checklinks` doesn't run the Firebase server) and it won't
+check incoming links.
+
+Before we can move the more complete
+[automated `linkcheck` solution](https://github.com/dart-lang/site-webdev/blob/master/scripts/check-links-using-fb.sh)
+from dartlang.org, we recommend manually running the following.
+
+* First time setup:
+
+  ```
+  pub global activate linkcheck
+  npm install -g superstatic
+  ``` 
+
+* Start the localhost Firebase server:
+
+  ```
+  superstatic --port 3474
+  ```
+
+* Run the link checker:
+
+  ```
+  linkcheck :3474
+  ```
+
+  Even better, to check that old URLs are correctly redirected:
+
+  ```
+  linkcheck :3474 --input tool/sitemap.txt
+  ```

tool/sitemap.txt

@@ -0,0 +1,235 @@
+http://localhost:3474/
+http://localhost:3474/technical-overview/
+http://localhost:3474/tos
+http://localhost:3474/tos/
+http://localhost:3474/technical-overview
+http://localhost:3474/faq/
+http://localhost:3474/formatting/
+http://localhost:3474/technical-overview/
+http://localhost:3474/upgrading/
+http://localhost:3474/ios-release/
+http://localhost:3474/android-release/
+http://localhost:3474/tos/
+http://localhost:3474/inspector/
+http://localhost:3474/debugging/
+http://localhost:3474/testing/
+http://localhost:3474/hot-reload/
+http://localhost:3474/using-ide/
+http://localhost:3474/downloads/Flutter-IntelliJ-cheat-sheet-WindowsLinux.pdf
+http://localhost:3474/json/
+http://localhost:3474/tutorials/internationalization/
+http://localhost:3474/downloads/Flutter-IntelliJ-cheat-sheet-MacOS.pdf
+http://localhost:3474/networking/
+http://localhost:3474/reading-writing-files/
+http://localhost:3474/platform-channels/
+http://localhost:3474/developing-packages/
+http://localhost:3474/using-packages/
+http://localhost:3474/tutorials/internationalization
+http://localhost:3474/tutorials/internationalization/
+http://localhost:3474/routing-and-navigation/
+http://localhost:3474/text-input/
+http://localhost:3474/assets-and-images/
+http://localhost:3474/layout/
+http://localhost:3474/custom-fonts/
+http://localhost:3474/animations/
+http://localhost:3474/gestures/
+http://localhost:3474/widgets/animation/
+http://localhost:3474/flutter-for-android/
+http://localhost:3474/animations/overview.html
+http://localhost:3474/catalog/samples/AnimatedListState_index/
+http://localhost:3474/widgets
+http://localhost:3474/animations/staggered-animations/
+http://localhost:3474/widgets/
+http://localhost:3474/animations/hero-animations/
+http://localhost:3474/widgets/scrolling
+http://localhost:3474/widgets/accessibility
+http://localhost:3474/widgets/async
+http://localhost:3474/widgets/accessibility/
+http://localhost:3474/widgets/async/
+http://localhost:3474/widgets/scrolling/
+http://localhost:3474/widgets/painting
+http://localhost:3474/widgets/painting/
+http://localhost:3474/widgets/accessibility/
+http://localhost:3474/widgets/scrolling/
+http://localhost:3474/widgets/async/
+http://localhost:3474/widgets/painting/
+http://localhost:3474/widgets/styling
+http://localhost:3474/widgets/styling/
+http://localhost:3474/widgets/interaction
+http://localhost:3474/widgets/interaction/
+http://localhost:3474/widgets/animation
+http://localhost:3474/widgets/animation/
+http://localhost:3474/widgets/input
+http://localhost:3474/widgets/input/
+http://localhost:3474/widgets/styling/
+http://localhost:3474/widgets/interaction/
+http://localhost:3474/widgets/input/
+http://localhost:3474/widgets/assets
+http://localhost:3474/widgets/assets/
+http://localhost:3474/widgets/text
+http://localhost:3474/widgets/text/
+http://localhost:3474/widgets/layout
+http://localhost:3474/widgets/layout/
+http://localhost:3474/widgets/cupertino
+http://localhost:3474/widgets/cupertino/
+http://localhost:3474/widgets/assets/
+http://localhost:3474/widgets/text/
+http://localhost:3474/widgets/material
+http://localhost:3474/widgets/basics
+http://localhost:3474/widgets/material/
+http://localhost:3474/widgets/basics/
+http://localhost:3474/catalog/samples/ListView_index/
+http://localhost:3474/widgets/cupertino/
+http://localhost:3474/catalog/samples/expansion-tile-sample/
+http://localhost:3474/catalog/samples/AppBar_index/
+http://localhost:3474/catalog/samples/PopupMenuButton_index/
+http://localhost:3474/catalog/samples/tabbed-app-bar/
+http://localhost:3474/catalog/samples/basic-app-bar/
+http://localhost:3474/catalog/samples/app-bar-bottom/
+http://localhost:3474/catalog/samples/TabBarView_index/
+http://localhost:3474/catalog/samples/IconButton_index/
+http://localhost:3474/catalog/samples/TabBar_index/
+http://localhost:3474/widgets/material/
+http://localhost:3474/catalog/samples/Scaffold_index/
+http://localhost:3474/widgets/basics/
+http://localhost:3474/widgets/layout/
+http://localhost:3474/widgets/widgetindex/
+http://localhost:3474/catalog/samples
+http://localhost:3474/catalog/samples/
+http://localhost:3474/catalog/samples/animated-list/
+http://localhost:3474/tutorials/animation/
+http://localhost:3474/web-analogs/
+http://localhost:3474/tutorials/interactive/
+http://localhost:3474/tutorials/layout/
+http://localhost:3474/setup-macos/
+http://localhost:3474/css/two_column.css
+http://localhost:3474/catalog/samples/
+http://localhost:3474/layout
+http://localhost:3474/layout/
+http://localhost:3474/web-analogs
+http://localhost:3474/web-analogs/
+http://localhost:3474/assets-and-images
+http://localhost:3474/assets-and-images/
+http://localhost:3474/widgets/
+http://localhost:3474/cookbook/
+http://localhost:3474/widgets-intro/
+http://localhost:3474/cookbook/networking/authenticated-requests/
+http://localhost:3474/cookbook/networking/fetch-data/
+http://localhost:3474/cookbook/lists/horizontal-list/
+http://localhost:3474/cookbook/lists/long-lists/
+http://localhost:3474/json
+http://localhost:3474/json/
+http://localhost:3474/cookbook/lists/basic-list/
+http://localhost:3474/cookbook/images/network-image/
+http://localhost:3474/bootstrap-into-dart/
+http://localhost:3474/ide-setup/
+http://localhost:3474/setup/
+http://localhost:3474/getting-started/
+http://localhost:3474/support/
+http://localhost:3474/css/main.css
+http://localhost:3474/css/lavish-bootstrap.css
+http://localhost:3474/images/favicon.png
+http://localhost:3474/setup-linux/
+http://localhost:3474/setup-windows/
+http://localhost:3474/setup-linux
+http://localhost:3474/setup-windows
+http://localhost:3474/setup-linux/
+http://localhost:3474/setup-windows/
+http://localhost:3474/setup-macos
+http://localhost:3474/images/flutter-mark-square-100.png
+http://localhost:3474/setup-macos/
+http://localhost:3474/images/homepage/hot-reload-bolt.png
+http://localhost:3474/images/homepage/screenshot-1.png
+http://localhost:3474/images/homepage/screenshot-2.png
+http://localhost:3474/images/homepage/ios-friendlychat.png
+http://localhost:3474/images/homepage/screenshot-3.png
+http://localhost:3474/js/customscripts.js
+http://localhost:3474/js/sidebar_toggle.js
+http://localhost:3474/js/prism.js
+http://localhost:3474/images/whatisflutter/hero-shrine.svg
+http://localhost:3474/images/whatisflutter/diagram-widgetclass.svg
+http://localhost:3474/images/whatisflutter/diagram-layercake.svg
+http://localhost:3474/images/whatisflutter/diagram-state.svg
+http://localhost:3474/images/intellij/trailing-comma-with.png
+http://localhost:3474/images/intellij/trailing-comma-without.png
+http://localhost:3474/images/releaseguide/xcode_settings.png
+http://localhost:3474/images/intellij/visual-debugging.png
+http://localhost:3474/images/intellij/hot-reload.gif
+http://localhost:3474/images/intellij/inspector_select_example.gif
+http://localhost:3474/images/intellij/dart-analysis.png
+http://localhost:3474/images/intellij/switch_inspector_tree.gif
+http://localhost:3474/images/intellij/main-toolbar.png
+http://localhost:3474/images/intellij/log.png
+http://localhost:3474/images/intellij/debug-panel.png
+http://localhost:3474/images/json/ide_warning.png
+http://localhost:3474/images/intellij/keymap-settings-flutter-plugin.png
+http://localhost:3474/images/intellij/templates.gif
+http://localhost:3474/images/PlatformChannels.png
+http://localhost:3474/images/assets-and-images/icon.png
+http://localhost:3474/images/intellij/assists.gif
+http://localhost:3474/images/assets-and-images/android-icon-path.png
+http://localhost:3474/images/assets-and-images/ios-icon-path.png
+http://localhost:3474/images/assets-and-images/launch-screen.png
+http://localhost:3474/images/assets-and-images/ios-launchscreen-xcode.png
+http://localhost:3474/images/ic_new_releases_black_24px.svg
+http://localhost:3474/images/catalog-widget-placeholder.png
+http://localhost:3474/animations/staggered-animations/images/StaggeredAnimationIntervals.png
+http://localhost:3474/images/fonts-example-android.png
+http://localhost:3474/images/fonts-example-ios.png
+http://localhost:3474/animations/hero-animations/images/hero-transition-0.png
+http://localhost:3474/animations/hero-animations/images/hero-transition-1.png
+http://localhost:3474/animations/hero-animations/images/hero-transition-3.png
+http://localhost:3474/animations/hero-animations/images/hero-transition-2.png
+http://localhost:3474/animations/hero-animations/images/photohero-class.png
+http://localhost:3474/animations/hero-animations/images/radial-hero-animation.png
+http://localhost:3474/images/widget-catalog/cupertino-activity-indicator.png
+http://localhost:3474/animations/hero-animations/images/radial-expansion-class.png
+http://localhost:3474/images/widget-catalog/cupertino-button.png
+http://localhost:3474/images/widget-catalog/cupertino-dialog.png
+http://localhost:3474/images/widget-catalog/cupertino-slider.png
+http://localhost:3474/images/widget-catalog/cupertino-switch.png
+http://localhost:3474/images/widget-catalog/cupertino-nav-bar.png
+http://localhost:3474/images/widget-catalog/cupertino-tab-bar.png
+http://localhost:3474/tutorials/animation/images/AnimatedBuilder-WidgetTree.png
+http://localhost:3474/tutorials/interactive/images/tapbox-active-state.png
+http://localhost:3474/tutorials/interactive/images/favorited-not-favorited.png
+http://localhost:3474/tutorials/interactive/images/lakes.jpg
+http://localhost:3474/tutorials/interactive/images/tapbox-inactive-state.png
+http://localhost:3474/images/setup/xcode-account.png
+http://localhost:3474/images/setup/trust-computer.png
+http://localhost:3474/images/setup/xcode-unique-bundle-id.png
+http://localhost:3474/tutorials/layout/images/lakes.jpg
+http://localhost:3474/tutorials/layout/images/title-section-diagram.png
+http://localhost:3474/tutorials/layout/images/lakes-icons.png
+http://localhost:3474/tutorials/layout/images/button-section-diagram.png
+http://localhost:3474/tutorials/layout/images/lakes-icons-visual.png
+http://localhost:3474/tutorials/layout/images/lakes-diagram.png
+http://localhost:3474/tutorials/layout/images/hello-world.png
+http://localhost:3474/tutorials/layout/images/pavlova-left-column-diagram.png
+http://localhost:3474/tutorials/layout/images/sample-flutter-layout.png
+http://localhost:3474/tutorials/layout/images/row-diagram.png
+http://localhost:3474/tutorials/layout/images/column-diagram.png
+http://localhost:3474/tutorials/layout/images/row-spaceevenly-visual.png
+http://localhost:3474/tutorials/layout/images/pavlova-diagram.png
+http://localhost:3474/tutorials/layout/images/column-visual.png
+http://localhost:3474/tutorials/layout/images/layout-too-large.png
+http://localhost:3474/tutorials/layout/images/row-expanded-visual.png
+http://localhost:3474/tutorials/layout/images/packed.png
+http://localhost:3474/tutorials/layout/images/widget-tree-pavlova-rating-row.png
+http://localhost:3474/tutorials/layout/images/row-expanded-2-visual.png
+http://localhost:3474/tutorials/layout/images/pavlova-large-annotated.png
+http://localhost:3474/tutorials/layout/images/margin-padding-border.png
+http://localhost:3474/tutorials/layout/images/widget-tree-pavlova-icon-row.png
+http://localhost:3474/tutorials/layout/images/listview.png
+http://localhost:3474/tutorials/layout/images/container.png
+http://localhost:3474/tutorials/layout/images/gridview-count-flutter-gallery.png
+http://localhost:3474/tutorials/layout/images/gridview-extent.png
+http://localhost:3474/tutorials/layout/images/listview-flutter-gallery.png
+http://localhost:3474/tutorials/layout/images/card.png
+http://localhost:3474/tutorials/layout/images/stack.png
+http://localhost:3474/tutorials/layout/images/stack-flutter-gallery.png
+http://localhost:3474/tutorials/layout/images/listtile-flutter-gallery.png
+http://localhost:3474/tutorials/layout/images/card-flutter-gallery.png
+http://localhost:3474/images/flutter-starter-app-ios.png
+http://localhost:3474/images/thumbs-up-support.png
+http://localhost:3474/images/flutter-starter-app-android.png