[ci] Roll repo tooling and add readme-check

.ci/scripts/prepare_tool.sh

@@ -8,4 +8,4 @@ git fetch origin master
 
 # Pinned version of the plugin tools, to avoid breakage in this repository
 # when pushing updates from flutter/plugins.
-dart pub global activate flutter_plugin_tools 0.8.2+1
+dart pub global activate flutter_plugin_tools 0.8.4

.cirrus.yml

@@ -59,6 +59,18 @@ task:
         license_script: dart pub global run flutter_plugin_tools license-check
         analyze_script: ./script/tool_runner.sh analyze --custom-analysis=script/configs/custom_analysis.yaml
         pubspec_script: ./script/tool_runner.sh pubspec-check
+        readme_script:
+          - ./script/tool_runner.sh readme-check
+          # Re-run with --require-excerpts, skipping packages that still need
+          # to be converted. Once https://github.com/flutter/flutter/issues/102679
+          # has been fixed, this can be removed and there can just be a single
+          # run with --require-excerpts and no exclusions.
+          - ./script/tool_runner.sh readme-check --require-excerpts --exclude=script/configs/temp_exclude_excerpt.yaml
+    - name: readme_excerpts
+      env:
+        CIRRUS_CLONE_SUBMODULES: true
+      script: ./script/tool_runner.sh update-excerpts --fail-on-change
+
     # Does a sanity check that packages at least pass analysis on the N-1 and N-2
     # versions of Flutter stable if the package claims to support that version.
     # This is to minimize accidentally making changes that break old versions

.github/workflows/release.yml

@@ -31,7 +31,7 @@ jobs:
       with:
         fetch-depth: 0 # Fetch all history so the tool can get all the tags to determine version.
     - name: Set up tools
-      run: dart pub global activate flutter_plugin_tools 0.8.2+1
+      run: dart pub global activate flutter_plugin_tools 0.8.4
 
     # # This workflow should be the last to run. So wait for all the other tests to succeed.
     - name: Wait on all tests

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "site-shared"]
+	path = site-shared
+	url = https://github.com/dart-lang/site-shared

packages/flutter_markdown/README.md

@@ -79,7 +79,7 @@ formatted output of the Markdown widget. For example, in the following Markdown
 widget constructor, a text string with a smiley face emoji is passed in as the
 source Markdown data.
 
-```
+```dart
 Markdown(
     controller: controller,
     selectable: true,
@@ -100,7 +100,7 @@ auto-links, and strike-through. To include the inline emoji tag syntax
 while maintaining the default GitHub flavored Markdown behavior, define
 an extension set that combines EmojiSyntax with ExtensionSet.gitHubFlavored.
 
-```
+```dart
 import 'package:markdown/markdown.dart' as md;
 
 Markdown(

script/configs/temp_exclude_excerpt.yaml

@@ -0,0 +1,19 @@
+# Packages that have not yet adopted code-excerpt.
+#
+# This only exists to allow incrementally adopting the new requirement.
+# Packages shoud never be added to this list.
+
+# TODO(stuartmorgan): Remove everything from this list. See
+# https://github.com/flutter/flutter/issues/102679
+- cross_file
+- css_colors
+- extension_google_sign_in_as_googleapis_auth
+- flutter_image
+- flutter_markdown
+- go_router
+- go_router_builder
+- multicast_dns
+- palette_generator
+- pigeon
+- pointer_interceptor
+- rfw

third_party/packages/cupertino_icons/README.md

@@ -9,7 +9,7 @@ https://pub.dev/packages/cupertino_icons
 
 [![pub package](https://img.shields.io/pub/v/cupertino_icons.svg)](https://pub.dev/packages/cupertino_icons)
 
-```
+```yaml
 dependencies:
   cupertino_icons: ^<latest-version>
 ```