[fuchsia] NNBD: Kernel libraries for Flutter, Dart runners #18714
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This updates the references to `third_party/dart/sdk` to `third_party/dart/sdk_nnbd` Fixes: flutter/flutter#58431
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Options to build the platform file also need to be changed, see usage of option
--enable-experiment=non-nullable and --nnbd-weak in lib/snapshot/BUILD.gn
In addition to these changes, we need to make sure if the following
Fuchsia libraries need to opt-in to non-nullability
dart:zircon (flutter/shell/platform/fuchsia/dart-pkg/zircon/lib/zircon.dart)
dart:fuschia (flutter/shell/platform/fuchsia/dart-pkg/fuchsia/lib/fuchsia.dart)
dart:fuchsia-builtin (flutter/shell/platform/fuchsia/dart_runner/embedder/builtin.dart)
If you encouter errors while building after turning on the --enable-experiment option
in these files it is probably a good idea to opt out these files until they can be ported over
for non-nullability.
See flutter/lib/ui/ui.dart for syntax on opting out
// @Dart = 2.6
This CL embeds the sdk_nnbd/lib/_internal/allowed_experiments.json into the CFE and uses this to allow experiments enabled on a per library basis. The file is embedded through generated code to avoid reliance on access to the file itself. A presubmit check is also added to ensure that the json file and the generated code are in sync. This work is in preparation for #41538 This was reverted in https://dart-review.googlesource.com/c/sdk/+/149620 because flutter wasn't prepared for auto-enabling nnbd in dart:* libraries. This has now been fixed in flutter/engine#18714 Closes #42162 Change-Id: I686ed6feaef8ee066b426068fe2a0f5080bf1713 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149588 Reviewed-by: Jens Johansen <jensj@google.com> Commit-Queue: Johnni Winther <johnniwinther@google.com>
This updates the references to
third_party/dart/sdktothird_party/dart/sdk_nnbdFixes: flutter/flutter#58431