Support for AOT compilation

[sriio]

With Dart 2.3, you can compile your backend ahead of time but it doesn't work with angel ...

Steps to reproduce:

Download Dart 2.3 here : http://gsdview.appspot.com/dart-archive/channels/stable/raw/2.3.0/sdk/

Create a new angel project with angel init test_project

Go to test_project and run dart2aot bin/prod.dart bin/prod.dart.aot

Problem:

You get this error :

 dart2aot bin/prod.dart bin/prod.dart.aot
error: import of dart:mirrors with --enable-mirrors=false

Cause:

Like the case of Flutter, the package 'mirrors' doesn't work with aot compilation ... No workaround, just find a way to replace it (with reflectable for example which is ok with aot)

[thosakwe]

Actually, Angel 2 has no dependency on dart:mirrors. Reflection is abstracted away via package:angel_container.

Note the call to MirrorsReflector() in prod.dart. If you delete that, along with the import of package:angel_container:mirrors.dart, you will be able to build it.

Removing mirrors-by-default was one of the biggest changes in Angel 2.

Also, there already is support for using package:reflectable. See package:angel_container_generator.

[sriio]

Thank you for your reply. I'm going to try your advices.

[sriio]

Still failing despite your instructions.

prod.dart

import 'package:dart_hello/dart_hello.dart';
import 'package:angel_production/angel_production.dart';

main(List<String> args) =>
    Runner('dart_hello', configureServer)
        .run(args);

Command :

dart2aot bin/prod.dart bin/prod.dart.aot
error: import of dart:mirrors with --enable-mirrors=false

[thosakwe]

Ah, on further investigation, I figured it out. angel_jael depends on jael, which uses dart:mirrors.

Just remove the angel_jael dependency, along with the usage of MirrorsReflector(), and it'll work.

Note: this means that, at least at the moment, Jael will not work in AOT. A new major version could potentially use the Reflector abstraction, instead of dart:mirrors.

[sriio]

Indeed, I commented in config.dart the importation of angel_jael and configuration line, now it works !
Instant startup, reduce memory from about 250mb to 30mb, all good :-)

Thank you for your help.

[thosakwe]

No problem! Excited. I might have to release a Jael v3 without mirrors, because templating is convenient. That being said, setting up reflectable *just* for the purposes of running a templating engine might be overkill.

On Tue, May 7, 2019 at 10:53 AM ***@***.*** ***@***.***> wrote: Indeed, I commented in config.dart the importation of angel_jael and configuration line, now it works ! Instant startup, reduce memory from about 250mb to 30mb, all good :-) Thank you for your help. — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#103 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACMIUPH3JX6PTUAKGLNLY6TPUGJWFANCNFSM4HLF2JGA> .

-- -- *Tobe Osakwe* Student, B.S. Comp. Sci, Florida State University https://thosakwe.com