dart-lang/sdk

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

Rob Halff

@rhalff

:tada:

RandalSchwartz @RandalSchwartz stumbles across dart2native and is happy

Randal L. Schwartz

@RandalSchwartz

dart can now give go a run for its money!

hey, does anyone here know if the dart sdk included with flutter is still a subset, or if it’s the full thing now?

Ping

@ping996

@RandalSchwartz flutter not use the dart:mirrors as I known

and flutter not support the native extension by instead of use the tonic third_party

Randal L. Schwartz

@RandalSchwartz

I know Flutter can't use mirrors but are they missing even from the included dart ask?

Ping

@ping996

I don't know, maybe the dart officer can clear your question.

Harsh Bhikadia

@daadu_gitlab

@richardheap I just realised that flutter bundles the truestedRootCAs with app itself and not trust the once in Android System. I guess that would be enough (as the server that I access uses LetsCrypt which is trusted) to prevent users from sniffing network call via CharlesProxy or something? what do you suggest?

Rasmus Schultz

@mindplay-dk

Has anyone successfully used hot reloading in a web server app? I'm using shelf, and I've been trying to get this jaguar_hotreload package to work.

Jaguar-dart/jaguar_hotreload#6

It says it's reloading, but changes don't seem to take effect. Is this a common limitation of hot reloading? Do I need to manually tear down and rebuild my HttpServer instance with new instances of middlewares, router, controllers, and so on?

Rob Halff

@rhalff

@mindplay-dk there is also a Jaguar channel: https://gitter.im/jaguar_dart/jaguar It's a bit less active lately. I do like the whole Jaguar stack a lot btw, minor issues like that seem to happen as there are not so many maintainers.

Rob Halff

@rhalff

I've just tested the example and it gives the same issue.

Rasmus Schultz

@mindplay-dk

Thanks, Rob :-)

@rhalff wait, were you referring to the websocket issue, or did you get past that to actual change detection and hot reloading? I've got it reloading. Or it says it does. Just that making changes to source-files doesn't actually have any effect.

Rob Halff

@rhalff

@mindplay-dk I'm referring to the websocket issue actually.

Rasmus Schultz

@mindplay-dk

@rhalff yeah, I got past that, and will probably submit a PR for that... but there's a snippet you can copy here to get the correct URL: https://github.com/Jaguar-dart/jaguar_hotreload/issues/6#issuecomment-554336704

@rhalff without that, the example doesn't work at all.

Rob Halff

@rhalff

I also found the dependencies are a bit ancient, the package is now called vm_service instead of vm_service_lib

Rasmus Schultz

@mindplay-dk

@rhalff are you sure? the change change log says vm_service_lib was migrated into the standard SDK?

Rob Halff

@rhalff

oh ok..

now the example seems to work for me after your adjustment.

1102
Paths ./example/jaguar_hotreload_example.dart___jb_tmp___ changed!
Reloading the application...
1121
Paths ./example/jaguar_hotreload_example.dart___jb_tmp___, ./example/jaguar_hotreload_example.dart changed!
Reloading the application...
1140

Rasmus Schultz

@mindplay-dk

Yeah, then it's probably what I suspected, it probably just doesn't work on Windows... 😐

I wanted to test if that was the case, but pub get doesn't seem to work under Ubuntu on WSL... man, I'm starting to hate Windows.

Rob Halff

@rhalff

I'm not really using windows, but cannot think of a reason why pub get wouldn't work for ubuntu.

Rasmus Schultz

@mindplay-dk

Ubuntu on WSL 1 has had plenty of IO and network issues, I don't know. I don't dare switch to the preview version of Windows required to run WSL 2, but supposedly that's much better.

Plenty of things motivating me daily as a developer to switch to native Linux anyhow, maybe it's time ;-)

Rob Halff

@rhalff

Or just dual boot, I have an second laptop running Windows 10, but never really touch it.

I don't get what people seek in windows, nor osx really. Only reason to own a mac is so you can use xcode.

Or work together with designers which use mac only stuff like Sketch :)

Rasmus Schultz

@mindplay-dk

Yeah, I want to dual boot for sure, I'm just a bit scared of bricking my Windows installation in the process... 😬

Rasmus Schultz

@mindplay-dk

@rhalff oh, you may be right about that package after all, it's flagged as "discontinued" https://pub.dev/packages/vm_service_lib

Rob Halff

@rhalff

@mindplay-dk you can just change it to vm_service in pubspec.yaml, the api hasn't changed it seems.

perhaps that does work on windows, not sure.

I've upgraded the dependencies to:

dependencies:
  vm_service: ^2.1.1
  watcher: ^0.9.7+12
  glob: ^1.2.0

Rasmus Schultz

@mindplay-dk

Tried that, same same.

Renato Athaydes

@renatoathaydes

@mindplay-dk FYI I tried the hello-world server with shelf + the hot_reload lib, on Ubuntu, and I got a different error:

Paths ./bin/server.dart changed!
Reloading the application...
Unhandled exception:
SocketException: OS Error: Connection refused, errno = 111, address = localhost, port = 49406
#0      vmServiceConnectUri (package:vm_service_lib/vm_service_lib_io.dart:20:22)
<asynchronous suspension>
#1      HotReloader.reload (package:jaguar_hotreload/src/jaguar_hotreload_base.dart:350:23)
<asynchronous suspension>
#2      new HotReloader.<anonymous closure> (package:jaguar_hotreload/src/jaguar_hotreload_base.dart:124:13)
<asynchronous suspension>
#3      _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#4      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#5      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#6      _SyncBroadcastStreamController._sendData (dart:async/broadcast_stream_controller.dart:375:20)
#7      _BroadcastStreamController.add (dart:async/broadcast_stream_controller.dart:250:5)
#8      Stream.timeout.onData (dart:async/stream.dart:1568:18)
#9      _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#10     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#11     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#12     _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:132:11)
#13     _WhereStream._handleData (dart:async/stream_pipe.dart:207:12)
#14     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:164:13)
#15     _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#16     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#17     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#18     _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:132:11)
#19     _MapStream._handleData (dart:async/stream_pipe.dart:232:10)
#20     _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:164:13)
#21     _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#22     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#23     _DelayedData.perform (dart:async/stream_impl.dart:591:14)
#24     _StreamImplEvents.handleNext (dart:async/stream_impl.dart:707:11)
#25     _PendingEvents.schedule.<anonymous closure> (dart:async/stream_impl.dart:667:7)
#26     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#27     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#28     _Timer._runTimers (dart:isolate-patch/timer_impl.dart:391:30)
#29     _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:416:5)
#30     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:12)

It probably used the wrong port, as Observatory is on another port (not sure that's the port it should use?):

Observatory listening on http://127.0.0.1:35831/R7b_Oe1tAdM=/

Renato Athaydes

@renatoathaydes

Ah! With the snippet you posted it does work for me as well... at least, when I change the response the server should return and save it, the code seems to reload as expected.

Renato Athaydes

@renatoathaydes

@mindplay-dk if nothing else works, you can do hot reloading via the Observatory directly... check this post I wrote some time ago that shows how you can do that if you don't already know.

willladislaw

@willladislaw

Are you supposed to close the file after reading contents?
error:
/credentials.json' (OS Error: Too many open files, errno = 24) on following file.

  static Future<File> get oauthCredentialsFile async {
    final path = await _localPath;
    return File('$path/credentials.json');
  }

Rob Halff

@rhalff

@willladislaw depends on the method you call after opening the file I think. if you do something like File('/etc/passwd').readAsString().then(..) it will be closed automatically, if you call something like .open() you will have to close it yourself.

Rob Halff

@rhalff

@willladislaw File is just the File object, I doesn't actually open the file yet.

Debugging too many open files can be nasty by the way, as the file which fails doesn't necessarily has to be the cause.

Seems to me that will not cause too many open files.

willladislaw

@willladislaw

Rob Halff

@rhalff

@willladislaw try setting breakpoints maybe, perhaps something being called recursively.

Randal L. Schwartz

@RandalSchwartz

Maybe that code is getting called from a build() method?

Oh, this not Flutter. :)

willladislaw

@willladislaw

tis flutter

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