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https://github.com/hydro-sdk/hydro-sdk

Author Flutter experiences in Typescript. No native bridge, no V8. Just Dart. From runtime to virtual machine.
https://github.com/hydro-sdk/hydro-sdk

android codepush dart deliver-updates flutter hydro-sdk ios over-the-air typescript

Last synced: 21 days ago
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Author Flutter experiences in Typescript. No native bridge, no V8. Just Dart. From runtime to virtual machine.

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# Hydro-SDK

![Logo](https://github.com/chgibb/hydro-sdk/blob/master/img/socialImage.png)



Author Flutter experiences in Typescript. No native bridge, no V8. Just Dart. From runtime to virtual machine.



# Sponsored by

Possibly you! See [sponsoring Hydro-SDK](https://github.com/sponsors/hydro-sdk)

# Documentation and Tutorials 

https://hydro-sdk.io/

# Features

## Hot Reload, Incremental Compilation

![Action Gif](https://github.com/hydro-sdk/counter-app/blob/master/media/action-gif.gif)



## Function Maps

![Function maps screenshot](https://github.com/chgibb/hydro-sdk/blob/master/img/sourceMapScreenShot.png)



# Roadmap

Hydro-SDK is a software development kit (SDK) enabling Flutter developers to write portions of their app (or their entire app) using Typescript. It is a project with one large, ambitious goal. "Become React Native for Flutter".

It aims to do that by:



1. Decoupling the API surface of Flutter from the Dart programming language.

2. Decoupling the development time experience of Flutter from the Dart programming language.

3. Providing first-class support for over-the-air distribution of code.

4. Providing an ecosystem of packages from pub.dev, automatically projected to supported languages and published to other package systems.



Hydro-SDK is currently only suitable for simple content. A few dozen Flutter widgets are supported. Content built with Hydro-SDK can be updated over the air using Hydro-SDK's built-in [codepush](https://hydro-sdk.io/blog/fluttering-over-the-air). Content can be authored in a similar manner as in Dart with hot-reload and limited IDE debugging support.



## Near Term

### API Support

Continue expanding available Dart and Flutter APIs with automatic language projection (ALP) using [Structured Wrapper and Interface generator for Dart (SWID)](https://github.com/hydro-sdk/hydro-sdk/tree/master/lib/swid).  This effort is where the overwhelming amount of focus currently is. Having a stable and high quality ALP will allow for the re-use of existing packages from `pub.dev` in Typescript. This will also allow for expanding support for authoring Hydro-SDK content to other programming languages.



This work is tracked at a high-level in the [Binding Generator project](https://github.com/hydro-sdk/hydro-sdk/projects/5) and in other sub-projects.

This work is required to expand support for Flutter 2.8 (and 2.10) and is directly related to the following umbrella issues.

- [☂️ Support Flutter 2.8](https://github.com/hydro-sdk/hydro-sdk/issues/773)

- [☂️ Cables](https://github.com/hydro-sdk/hydro-sdk/issues/684)



## Medium Term

### Developer Ergonomics  

Improving developer ergonomics with more affective testing workflows and support for Typescript language features like `async` / `await` interop with Dart.

This is being scoped and tracked at a high level in umbrella issues.

- [☂️ Improved Test Ergonomics](https://github.com/hydro-sdk/hydro-sdk/issues/843)

- [☂️ Typescript 4](https://github.com/hydro-sdk/hydro-sdk/issues/844)

### Performance

Establishing performance baselines through benchmarking. Some efforts to improve performance. This is being scoped and tracked at a high level in umbrella issues.

- [☂️ Optimizing Lua Compiler](https://github.com/hydro-sdk/hydro-sdk/issues/797)

- [☂️ Size Benchmarks](https://github.com/hydro-sdk/hydro-sdk/issues/846)

- [☂️ CPU and Memory Benchmarks](https://github.com/hydro-sdk/hydro-sdk/issues/845)



## Long Term Projects

## Developer Ergonomics

Lower the barrier to entry for developers with non-mobile backgrounds that are interested in trying out Flutter and Hydro-SDK.

- [☂️ Component Preview](https://github.com/hydro-sdk/hydro-sdk/issues/763)

## Services

### Registry

A closed-source component registry for first-class support for hosting and running over-the-air (OTA) update packages built using the open-source Hydro-SDK. This service is already live as a basic [MVP](https://registry.hydro-sdk.io/#/).



### Registry Value Adds

In the future, building paid features such as targeted distribution, analytics, feature flagging and logging directly into Registry are expected to be a viable path to monetization.



### Language Support

Hydro-SDK is language agnostic. In the future, it should be possible to support authoring content in other programming languages to attract users from other ecosystems (Flixel, .NET, Xamarin).

### Tier 1 (hot-reload, programmatic debugging, function maps)

- [✓] Typescript  

    https://github.com/TypeScriptToLua/TypeScriptToLua

### Tier 2 (hot-reload, programmatic debugging)

- [ ] Haxe  

    https://github.com/HaxeFoundation/haxe    

- [ ] C#  

    https://github.com/yanghuan/CSharp.lua 



# Prior Art for Common Flutter Runtime

- Dartlua, Andre Lipke https://github.com/PixelToast/dartlua

- React Native, Facebook https://reactnative.dev/

- LuaViewSdk, Alibaba https://github.com/alibaba/LuaViewSDK

- ILRuntime, Ourpalm https://github.com/Ourpalm/ILRuntime

- Flutterscript, Charles Lowell https://github.com/cowboyd/flutterscript

- Lisp in Dart, Suzuki Hisao https://github.com/nukata/lisp-in-dart

- widget_extensions https://github.com/canewsin/widget_extensions

- xamarin.flutter https://github.com/adamped/xamarin.flutter



# Prior Art for Structured Wrapper and Interface generator for Dart

- Dartle, https://docs.google.com/document/d/1Ei0ZIqdqNjxTHoGB3Ay6SWQg3DMSsKKWl70XoBUCFTA/edit

- Pigeon, https://github.com/flutter/packages/tree/master/packages/pigeon

- Djinni, https://github.com/dropbox/djinni

- Uniffi-rs, https://github.com/mozilla/uniffi-rs

- TS to CSharp, https://github.com/mono/TsToCSharp



# Interesting Links and Resources

- John C. Reynolds, Definitional Interpreters for Higher-Order Programming Languages https://surface.syr.edu/cgi/viewcontent.cgi?article=1012&context=lcsmith_other

- Andrey Mokhov, Neil Mitchell, Simon Peyton Jones, Build Systems a la carte: Theory and Practice https://www.cambridge.org/core/journals/journal-of-functional-programming/article/build-systems-a-la-carte-theory-and-practice/097CE52C750E69BD16B78C318754C7A4

- Fabio Mascarenhas de Queiroz, Optimized Compilation of a Dynamic Language to a Managed Runtime Environment http://www.lua.inf.puc-rio.br/publications/mascarenhas09optimized.pdf

- Michael Schroder, Optimizing Lua Using Run-time Type Specialization https://www.complang.tuwien.ac.at/anton/praktika-fertig/schroeder/thesis.pdf

- Satoru Kawahara, Optimizing Lua VM Bytecode Using Global Dataflow Analysis https://nymphium.github.io/pdf/opeth_report.pdf

- Haichuan Wang, Compiler and Runtime Techniques for Optimizing Dynamic Scripting Languages https://www.ideals.illinois.edu/bitstream/handle/2142/78638/WANG-DISSERTATION-2015.pdf?sequence=1&isAllowed=y

- Kevin Williams, Jason McCandless, David Gregg, Dynamic Interpretation for Dynamic Scripting Languages https://sites.cs.ucsb.edu/~ckrintz/papers/TCD-CS-2009-37.pdf

- Dibyendu Majumdar, Ravi Lua 5.3 bytecode reference https://the-ravi-programming-language.readthedocs.io/en/latest/lua_bytecode_reference.html

- Kein-Hong Man, A No-Frills Introduction to Lua 5.1 VM Instructions http://luaforge.net/docman/83/98/ANoFrillsIntroToLua51VMInstructions.pdf

- Rust Programming Language Request for Comments 2603, Symbol Name Mangling https://github.com/rust-lang/rfcs/blob/master/text/2603-rust-symbol-name-mangling-v0.md

- Itanium C++ Application Binary Interface Specification https://itanium-cxx-abi.github.io/cxx-abi/abi.html

- Yan Dong Zonz, Wen Hui-chao, Exploration and practice of Flutter packet size management https://tech.meituan.com/2020/09/18/flutter-in-meituan.html

- Shangxian, Meituan takeaway Flutter dynamic practice https://tech.meituan.com/2020/06/23/meituan-flutter-flap.html

- Vyacheslav Egorov, 10 Years of Dart (Slides)

    https://mrale.ph/talks/vmil2020/