Better .gitignore

.gitignore

@@ -17,16 +17,42 @@
 .idea/
 
 # Visual Studio Code related
+.classpath
+.project
+.settings/
 .vscode/
 
+# Flutter repo-specific
+/bin/cache/
+/bin/mingit/
+/dev/benchmarks/mega_gallery/
+/dev/bots/.recipe_deps
+/dev/bots/android_tools/
+/dev/docs/doc/
+/dev/docs/flutter.docs.zip
+/dev/docs/lib/
+/dev/docs/pubspec.yaml
+/dev/integration_tests/**/xcuserdata
+/dev/integration_tests/**/Pods
+/packages/flutter/coverage/
+version
+
+# packages file containing multi-root paths
+.packages.generated
+
 # Flutter/Dart/Pub related
 **/doc/api/
 .dart_tool/
 .flutter-plugins
+.flutter-plugins-dependencies
 .packages
 .pub-cache/
 .pub/
 build/
+flutter_*.png
+linked_*.ds
+unlinked.ds
+unlinked_spec.ds
 
 # Android related
 **/android/**/gradle-wrapper.jar
@@ -36,6 +62,8 @@ build/
 **/android/gradlew.bat
 **/android/local.properties
 **/android/**/GeneratedPluginRegistrant.java
+**/android/key.properties
+*.jks
 
 # iOS/XCode related
 **/ios/**/*.mode1v3
@@ -56,16 +84,22 @@ build/
 **/ios/.generated/
 **/ios/Flutter/App.framework
 **/ios/Flutter/Flutter.framework
+**/ios/Flutter/Flutter.podspec
 **/ios/Flutter/Generated.xcconfig
 **/ios/Flutter/app.flx
 **/ios/Flutter/app.zip
 **/ios/Flutter/flutter_assets/
+**/ios/Flutter/flutter_export_environment.sh
 **/ios/ServiceDefinitions.json
 **/ios/Runner/GeneratedPluginRegistrant.*
 
+# Coverage
+coverage/
+
 # Exceptions to above rules.
 !**/ios/**/default.mode1v3
 !**/ios/**/default.mode2v3
 !**/ios/**/default.pbxuser
 !**/ios/**/default.perspectivev3
 !/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
+!/dev/ci/**/Gemfile.lock