Explain how to create a Flutter package with Rust (instead of an app)

[fzyzcjy]

Currently we have a lot of doc if we want to create a flutter app with rust. but no doc or template yet for flutter packages.

related: #819 (reply in thread)

[buraktabn]

Take a look at Isar. I believe it can help what you're trying to achieve.

[fzyzcjy]

@buraktabn Hi thanks for the link! Indeed flutter_rust_bridge does support packages since day one - because that's how I personally use it. It is just lacking doc and template because my personal usage depends on my internal python-based tooling which is surely not suitable for external devs.

[GregoryConrad]

@fzyzcjy Since I have done this entire process already, using the latest recommended approaches where possible, I think I would be willing to take this issue on sometime soon. Isar is a good starting point (and indeed I used it for reference in certain places my library); however, I found better ways to take care of some things related to Rust interop that Isar does not do (mostly distributing binaries separately).

In the meantime, if anyone comes across this issue before I can tackle the documentation, take a look at my library, mimir for an example of how to make a Dart-only base and then a Flutter library built directly on top of it for ease of use.

Some related issues that I still need to work out in mimir before I can solidly make said documentation:

• Consider switching the android build over to CMake GregoryConrad/mimir#81
• Web support (theoretical) GregoryConrad/mimir#10

Edit: I hopefully will tackle web support in my project in several weeks. But, before I do that, expect a PR for documentation on how to do make a library in ~2 weeks once I finish my school's finals week.

[GregoryConrad]

Highly related: dart-lang/sdk#50565

I will write the documentation for the current solution soon (& link to the above issue in the docs) but Native Assets would be the proper solution going forward.

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