Debug adapter maps some file paths to the wrong location #128880
Description
In the debug adapter, we map org-dartlang-sdk URIs onto local file paths so that the IDE can open them:
@CoderDake discovered that some mappings were not working in VS Code, for example dart:core-patch/growable_array.dart.
It turns out that growable_array.dart exists here:
flutter/bin/cache/dart-sdk/lib/_internal/vm/lib/growable_array.dart
but not here:
flutter/bin/cache/pkg/sky_engine/lib/_internal/vm/lib/growable_array.dart
This means the IDE fails to find the file.
Are we mapping to the wrong location? Should we be mapping to dart-sdk instead of pkg/sky_engine (except for ui which only exists in sky_engine)? Or are there other differences between these locations (other than sky_engine missing lots of files)? Do we need to conditionally map some URIs to one and some to the other (besides ui)?
I can make the change, but I'd like to ensure I understand the differences between these folders before I do, but I'm not where I can find the answer to that (@christopherfujino is this something you know, or can point me in the right direction?)