dart-lang/sdk

The Dart SDK, including the VM, dart2js, core libraries, and more.

bpilot

@bpilot

What is your motivation for using Dart with node.js?

Renato Athaydes

@renatoathaydes

testing GH Actions

they need to be runnable in node

I'm quite surprised Dart compilers don't transpile to node directly.

bpilot

@bpilot

Ah okay. The reason for me was I have a legacy Node.js application which I'm slowly migrating to Dart, so I need the code to be able to execute inside & interop with JS code.

I am too, especially since the test runner does.

Renato Athaydes

@renatoathaydes

exactly

pub run test -p node works

Renato Athaydes

@renatoathaydes

There's already a package for node interop: https://pub.dev/packages/node_interop

and the builder I was saying we should have: https://pub.dev/packages/build_node_compilers

bpilot

@bpilot

Brilliant find!

imerkle

@imerkle

If I want to send list of ints I can do like asTypedList

But I can't figure how to send list of struct in ffi

imerkle

@imerkle

final ptr = allocate<Uint8>(count: size);
    final externalTypedData = ptr.asTypedList(size);

I want to implement asTypedList for <T>

Flavian Alexandru

@alexflav23

If a version of webdev is added to dev_dependencies in pubspec.yaml does that forces it to be used and auto-downloaded on every machine? Just been through a catastrophic 2.6.0 update and it’s not making a lot of sense that webdev, build_runner and build_compiler are closely knit together without them being versioned tied as well.

I’m not sure if inside the migthy google this is always remotely built via forge/blaze and therefore this kind of coupled setup is largely irrelevant, it’s certainly looking to behave that way

But it’s certainly a bit of a pain point for all plebs that are confined to forever build locally at dev time :)

Nate Bosch

@natebosch

We agree that the version coupling between webdev and build_runner is a problem - we had hoped that by not expressing it as a pub dependency it would give us leeway for a better UX but that hasn't worked out in practice. We don't have any short term plans here but finding a better way to handle versioning is something that we are interested in improving.

I'm a bit confused about what you mean about it being auto-downloaded on every machine. It is true that if we put more stuff into dev_dependencies that everyone who works on the project and does a pub get would download those packages. It doesn't impact anyone who depends on those packages though, so they don't put a download burden on further downstream stuff.

I'm trying to understand your main concern - is it related to having to download all these packages on each host you work on? Or on a continuous integration environment?

Flavian Alexandru

@alexflav23

Yeah basically

Just had to go round a 10 dev team to do manual webdev bumps

Because post 2.6.0 update it all went kaboom and we were left scratching heads

I’m not sure if there’s a clever way to mitigate that in the short term, outside of Docker boxes or whatever, that would be a time penalty and resource penalty

It stands to reason that if there’s a git committed lock file, all deps should largely look identical. In contrast, something like SBT let’s you define Scala version and whatnot exclusively in project files. If I don’t have the correct “out deps” as a dev checking in a new commit, they get automagically setup

Nate Bosch

@natebosch

I can't think of a good way to mitigate in the short term. Hopefully we're able to find a better way to distribute webdev that makes the updates less painful in the future. It won't reduce the amount of downloading that needs to happen, but hopefully we can avoid those runtime version complains and make it so that a pub get will just get you into a state where things work

Flavian Alexandru

@alexflav23

Downloading is fine, so long as it’s automated.

bpilot

@bpilot

Use dart2js command directly?

Flavian Alexandru

@alexflav23

@natebosch Basically downloading on each machine is the automation dream, just to be clear. E.g new webdev version in the lock, autoresolve. In practice it means of course localsing the webdev launcher to the “project scope”, which could be teh defined folder structure that has a pubspec.yaml at the top level.

That being said, sounds like this is on the roadmap

And we need to wait for a fix

Rob Becker

@robrbecker

@natebosch This ties into what we were looking to do by adding global dependencies in the pubspec.yaml dart-lang/pub#1231 .. @alexflav23 If that’s something you’d like, give that issue a thumbs up.

Simon Binder

@simolus3

@imerkle There's no generic TypedList for Dart objects, and it looks like there's no builtin way to create a pointer-array of structs. I use this workaround to create a pointer from a struct list:

Pointer<T> createArrayPointer<T extends Struct>(List<T> list) {
  final ptr = allocate<T>(count: list.length);
  final size = sizeOf<T>();

  for (var i = 0; i < list.length; i++) {
    final asBytes = ptr.elementAt(i).cast<Uint8>();
    final structData = list[i].addressOf.cast<Uint8>();

    for (var j = 0; j < size; j++) {
      asBytes[j] = structData[j];
    }
  }

  return ptr;
}

You could turn that into a generic List implementation on NativeType

Jacob MacDonald

@jakemac53

Fwiw @alexflav23 @robrbecker you can add webdev to dev_dependencies and run it with pub run webdev. Then you can check in your pubspec.lock file so that all users are using the same pinned version.

Basically use it as a local dev dependency instead of as a global dependency. You could then even add an alias to your .bashrc file for webdev which does pub run webdev if you want the shorter command to run it.

You can do this for any package that would normally be globally activated

Rob Becker

@robrbecker

yeah, I suppose that works

Jonathan White

@ThinkDigitalSoftware

Which repo do I submit an issue in for an invalid refactoring option? It show the option to extract the expression into a variable when it relies on a variable that was created in the inner scope and there’s no valid way to extract this expression into a variable

it exists in both Intellij and VScode

Screen Shot 2019-11-19 at 9.36.29 AM.png

Please tag me in a response, I have notifications turned off for non-mentions

Simon Binder

@simolus3

@ThinkDigitalSoftware Those options are generated by the analysis server, which is part of https://github.com/dart-lang/sdk. So I'd say that's the most accurate place to open an issue.

Jonathan White

@ThinkDigitalSoftware

OK, thank you!

smolck

@smolck

Is there any way to listen to the current stdout? Like do something along the lines of stdout.listen(listener)?

So that way if I were, for example, to do stdout.write('foo') then the listener callback would get that 'foo' string.

Andre

@PixelToast

@smolck not for stdout but you can use Zones to intercept prints

https://dart.dev/articles/archive/zones#example-overriding-print

smolck

@smolck

Can I do that for stdout? I find it a little strange that I can't listen to the stdout of the current process....

but I can do so for the current stdin.

And, for a Process

Where communities thrive

People

Repo info

Activity