avmplus

Flash is proprietary(#), so nobody bothered. When I contributed to Ruffle I think buying a second hand Adobe Flash Professional CS 6 was the recommended way. Also some subscriptions that you can buy from Adobe cover producing Flash format. (#)Some exclusions exist which made Ruffle possible (for example https://github.com/adobe/avmplus is open sourced) but it's not like everything is fully open.

They have outsourced a large chunk of it[1], although you could argue not enough of it. 1. https://github.com/adobe/avmplus

In Java you would use packages to group together class definitions same as with C++, C# where you would use namespaces to do that aka define the scope of classes in AS3, the packages are used the same, group collection of definitions, not only classes and interfaces but also variables, constants. The namespaces in AS3 are used to define the visibility of definitions at the class level, a bit like being able to define your own "public" attribute. In ActionScript 3, by default the AS3 namespace is open, for example with a builtin like Array instead of using the push() method defined in the prototype, it uses the push() method defined in the AS3 namespace. See https://github.com/adobe/avmplus/blob/master/core/Array.as#L... But you also have mode to compile with -ES to not open that AS3 namespace by default. In ES4, namespaces could do more a

Please correct me if I am wrong, but I believe that you need the source code to compile a program using Emscripten? Even if some components of the Player are open-sourced [1], the Player itself is still closed source. [1]: https://github.com/adobe/avmplus

About the open source AVM2, there are in total 3 versions: The tamarin project on Mozilla mercurial with tamarin-central [0] and tamarin-redux [1] Then after the project got abandoned, Adobe renamed it to avmplus and moved it to github [2] and made a couple updates. Later on, they moved it to another repo [3], updated it on December 2015 to the equivalent of Flash Player v19.0 and updated it again on Mars 2016 to the equivalent of Flash Player v20.0 (codename rankin). I maintain a fork/extension named redtamarin [4] which focus mainly on adding native API to make ActionScript 3.0 run on the command-line, shell scripts, server-side, etc. imho FlasCC/Alchemy/CrossBridge did not take off because it is much harder for dev to produce a project in C++ than in AS3, also why redtamarin took an opposite approach: bring the C API to the AS3 context

Redtamarin: AS3 running on the command line / server side Basically, based out of the Tamarin [1] / avmplus [2] open source project (not updated anymore) the goal is to develop the runtime to support more native functionalities and other system calls. It is about the ActionScript 3.0 language and the ActionScript Virtual Machine (AVM2), and how to port those to the command-line and server-side and "compete" with many other languages like Perl, PHP, Python, Ruby, etc. So yeah it is probably less sexy than to work on popular JS stuff :D It's not about cloning V8/Node and do it with AVM2/AS3, it's more about providing the native calls, the tools to let other developers build their own clone of Node.js if they want to. It's not about producing a "Flash Player clone" either. Current release is 0.4.1, v0.4.2 coming up next week. This project ca