Min Dart SDK version

[bruno-garcia]

We're releasing 4.0.0 which is a big major version so it's time to discuss the min Dart SDK version we want to support on the sentry package.

Important notes:

• Dart just released 2.10
• Extension methods were introduced on 2.7
• 2.7 was introduced in December 2019
• Flutter's new releases often update to the latest Dart SDK version
  • i.e: Version note: As of Flutter 1.21, the Flutter SDK includes the full Dart SDK. This site’s documentation and examples use version 2.10.0 of the Dart SDK.

I'd propose we set the min version to 2.7:

sentry-dart/dart/pubspec.yaml

Line 9 in cc913bf

sdk: ^2.0.0

To clarify: What would we leaving behind? Is there a reason folks using AngularDart can't be on Dart 2.7?

[rxlabz]

FYI Angular is now using Dart >= 2.8.4 https://github.com/dart-lang/angular/blob/master/angular/pubspec.yaml
I think we can/should upgrade to 2.7 (at least).
And as we started to prepare the NNBD, we'll need to move to the last SDK version if we want to use it.

[marandaneto]

we'll need to move to the last SDK version if we want to use it.

this goes heavily against https://develop.sentry.dev/sdk/philosophy/#compatibility-is-king

I'm all in for new features, but if it breaks a good amount of people, I prefer to keep using https://pub.dev/packages/meta at least for a few more months after NNBD being GA, and also checking how NNBD deals with 3rd parties that are not NNBD ready, I guess this will be common for a while

[bruno-garcia]

we'll need to move to the last SDK version if we want to use it.

Yeah, last version is just not an option.

I noticed other packages have a second package name with nullability on the name or something?

Sounds easier for us to just wait out on this, it seems.

[bruno-garcia]

I opened a poll, lets see if we get enough data:

https://twitter.com/brungarc/status/1318947753620348934?s=20

[rxlabz]

almost all the Dart team packages (http, meta, path, ...) are now >= 2.10 and are prepared to NNBD https://pub.dev/dart/packages?sort=popularity

[bruno-garcia]

That's a very compelling reason to go for 2.10 🤐

[marandaneto]

https://github.com/getsentry/sentry-dart/releases/tag/4.0.0-alpha.2
Breaking changes section states the minSDK for Dart and Flutter