Can we invoke runMain on "@main" class?

[hmf]

I have the following code snippet:

object Foo:

  @main
  def main(text: String) =
    println("Hello from @main Foo")

  // def main(args: Array[String]): Unit = 
  //   println("Hello from static Foo main")

Here is the error I get:

hmf@gandalf:/mnt/ssd2/hmf/VSCodeProjects/storch$ ./mill examples.runMain Foo
[114/114] examples.runMain 
Error: Main method not found in class Foo, please define the main method as:
   public static void main(String[] args)
or a JavaFX application class must extend javafx.application.Application
1 targets failed

If I use the above comment the "standard" main method, then no error occurs.

Is their anything I can do, save adding the main method, that lets me execute the "@main"? Reason I ask is because I am creating a Mill build script for an existing SBT based project and I am trying to leave the source as it is.

TIA

[lefou]

I think it should be accessible as just main (or maybe Foo.main). The documentation is only 99.9% clear (as there could be multiple object containing a @main-annotated main in which case it collides).

A @main annotated method can be written either at the top-level (as shown), or inside a statically accessible object. In either case, the name of the program is in each case the name of the method, without any object prefixes.

So, it's either this:

$ mill examples.runMain main

or maybe this:

$ mill examples.runMain Foo.main

[hmf]

It seems like it is just main:

$ ./mill examples.runMain main "Hello"
[114/114] examples.runMain 
Hello from @main Foo

You are also correct about the collision. We need to use another name for the annotated method.

Thank you.