Allowing to add metadata to the Main entry point

[chipshort]

I experienced this with the C# target, but it might fit for others as well:
I wanted to add [System.STAThread] to the main entry point of my project, but this is not possible, because it is hardcoded into the compiler code. I think it would be better if the compiler could check for an existing "Main" function or to add some other option to change the entry point class.
I had to work around this by writing a script that edits hxcs_build.txt's "main" section to point to the following Haxe class:

class MainHook
{
    @:meta(System.STAThread)
    public static function Main() : Void
    {
        cs.Boot.init();
        untyped CloudShelter.main();
    }
}

and start haxelib run hxcs hxcs_build.txt manually.
I'm sorry if there already is a better way of handling this, I did not find any information about it.

[judah-caruso]

I found an alternative to above that's worked for me so far. Even though this thread is ancient, I'm putting this here for others looking for a fix. Also want to reiterate that there's probably a better way to do this.

Adding @:classCode("[System.STAThread]\n") above your main class definition generates the expected code.

@:classCode("[System.STAThread]\n")
class Program {
    // ...
    public static function main() {
        // ...
    }
}

will generate:

[System.STAThread]
public static void Main(){
    global::cs.Boot.init();
    global::Program.main();
}

Note: This is not a very stable alternative as we're banking on the fact that Main() is generated/inserted first. If this changes, this 'fix' would no longer work. However, this gets around having to create a shim entrypoint and build manually with a modified hxcs_build.txt.