[ffi] Fix callback subtyping test Previously we were reusing the ensureNativeTypeToDartType function to check that Dart function passed as a callback matches the native type. This works if the types exactly match, but the subtyping test is backwards, so it doesn't allow certain cases that should be allowed. The main case is that when the native function type returns void, the Dart function should be allowed to return anything. So I added ensureDartTypeToNativeType, which reverses the subtype test. As well as making the return types more permissive, this has also changed what parameters are allowed to be passed to callbacks. For example, in tests/ffi/vmspecific_static_checks_typeddata_test.dart:80, passing a Handle to a function expecting an Int8List used to work, but is now a compile error. I think this change is an improvement, because previously it would have been possible to pass any type of object to that callback. So this change turns some potential runtime type errors into compile errors. But technically I think this is a breaking change. Fixes: https://github.com/dart-lang/sdk/issues/53659 Bug: https://github.com/dart-lang/sdk/issues/53659 Change-Id: I6846a59fc309ec897cba8f985d7dd0a63b912b42 TEST=tests/ffi/function_callbacks_subtype_test.dart and others Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/346440 Commit-Queue: Liam Appelbe <liama@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> https://dart.googlesource.com/sdk/+/dff831dbfc64aef548caed79829a62c4aae13f17
Monorepo is:
With depot_tools installed and on your path, create a directory for your monorepo checkout and run these commands to create a gclient solution in that directory:
mkdir monorepo cd monorepo gclient config --unmanaged https://dart.googlesource.com/monorepo gclient sync -D
This gives you a checkout in the monorepo directory that contains:
monorepo/ DEPS - the DEPS used for this gclient checkout commits.json - the pinned commits for Dart, flutter/engine, and flutter/flutter tools/ - scripts used to create monorepo DEPS engine/src/ - the flutter/buildroot repo flutter/ - the flutter/engine repo out/ - the build directory, where Flutter engine builds are created third_party/ - Flutter dependencies checked out by DEPS dart/ - the Dart SDK checkout. third_party - Dart dependencies, also used by Flutter flutter/ - the flutter/flutter repo
Flutter's instructions for building the engine are at Compiling the engine
They can be followed closely, with a few changes:
goma_ctl ensure_start is sufficient.Example build commands that work on linux:
MONOREPO_PATH=$PWD if [[ ! $PATH =~ (^|:)$MONOREPO_PATH/flutter/bin(:|$) ]]; then PATH=$MONOREPO_PATH/flutter/bin:$PATH fi export GOMA_DIR=$(dirname $(command -v gclient))/.cipd_bin goma_ctl ensure_start pushd engine/src flutter/tools/gn --goma --no-prebuilt-dart-sdk --unoptimized --full-dart-sdk autoninja -C out/host_debug_unopt popd
The Flutter commands used to build and run apps will use the locally built Flutter engine and Dart SDK, instead of the one downloaded by the Flutter tool, if the --local-engine option is provided.
For example, to build and run the Flutter spinning square sample on the web platform,
MONOREPO_PATH=$PWD cd flutter/examples/layers flutter --local-engine=host_debug_unopt \ -d chrome run widgets/spinning_square.dart cd $MONOREPO_PATH
To build for desktop, specify the desktop platform device in flutter run as -d macos or -d linux or -d windows. You may also need to run the command
flutter create --platforms=windows,macos,linux
on existing apps, such as sample apps. New apps created with flutter create already include these support files. Details of desktop support are at Desktop Support for Flutter
Tests in the Flutter source tree can be run with the flutter test command, run in the directory of a package containing tests. For example:
MONOREPO_PATH=$PWD cd flutter/packages/flutter flutter test --local-engine=host_debug_unopt cd $MONOREPO_PATH
Please file an issue or email the dart-engprod team with any problems with or questions about using monorepo.
We will update this documentation to address them.
flutter commands may download the engine and Dart SDK files for the configured channel, even though they will be using the local engine and its SDK.gclient sync needs to be run in an administrator session, because some installed dependencies create symlinks.