flutter/engine/DEPS depends on package:equatable, but doesn't use it.

[eseidel]

https://github.com/flutter/engine/blob/bbce2b8a2f220cecf3b8bf0f5db4819f3d62e193/DEPS#L642

pulls in third_party/pkg/equatable (at an old version).
testing/benchmark depends on it (but doesn't seem to use it?)

It was added in flutter/engine@6625bd1 by @zanderso

AFAICT, all other mentions of "equatable" in flutter/engine are just for license maintenance.

This came to my attention trying to pull packages for all directories and finding third_party/pkg/equatable was super-old.

eseidel@erics-mbp src % very_good packages get -r
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/flutter/flutter_frontend_server (0.7s)
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/flutter/web_sdk (0.7s)
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/flutter/ci (0.5s)
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/flutter/shell/vmservice (0.4s)
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/flutter/tools/licenses (0.5s)
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/flutter/tools/gen_web_locale_keymap (0.7s)
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/flutter/impeller/golden_tests_harvester (0.5s)
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/flutter/tools/android_lint (0.5s)
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/flutter/tools/clang_tidy (0.6s)
✓ Running "flutter packages get" in /Users/eseidel/Documents/GitHub/engine/src/third_party/pkg/equatable (1.4s)
ProcessException: Standard out
Resolving dependencies...
Standard error
The current Dart SDK version is 3.1.4.

Because equatable depends on coverage >=0.1.1 <1.0.0 which doesn't support null safety, version solving failed.

The lower bound of "sdk: '<2.0.0 or >=2.0.0-dev.30 <3.0.0'" must be 2.12.0 or higher to enable null safety.
For details, see https://dart.dev/null-safety


You can try one of the following suggestions to make the pubspec resolve:
* Try using the Flutter SDK version: 3.7.12. 
* Try upgrading your constraint on coverage: flutter pub add dev:coverage:^1.7.1
  Command: flutter packages get

[zanderso]

It's a transitive dependency of package:metrics_center. Attempting to update it here: flutter/engine#47475.

[zanderso]

I believe this was resolved by flutter/engine#47475.

[github-actions]

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