AsyncParsableCommand never runs. Only shows help text.

[myleshyson]

I'm using Swift 6.0, and Im trying to use adhere to to the AsyncParsableCommand protocol. However I'm noticing that no matter what, my program always returns the help text instead of actually running.

There's post here describing this issue as well. Seems like the compiler favors the sync run command over the async run command.

Here's my main file. Just trying to print a string right now.

import ArgumentParser

@main
struct PhpFlayer: AsyncParsableCommand {
    mutating func run() async throws {
        print("I'm working!")
    }
}

ArgumentParser version: main branch Swift version: swift-driver version: 1.113 Apple Swift version 6.0 (swiftlang-6.0.0.7.6 clang-1600.0.24.1) Target: arm64-apple-macosx14.0.

Checklist

• [x ] If possible, I've reproduced the issue using the main branch of this package
• [x ] I've searched for existing GitHub issues

Steps to Reproduce

1. Create an empty project
   • mkdir MyCLI && cd MyCLI
   • swift package init --name MyCLI --type executable

2. Setup the entry file and add the argument parser package

   • Add the argument parser package to Package.swift
   • rename Sources/main.swift to Sources/MyCLI.swift
   • setup the following main struct

     
     import ArgumentParser

   @main struct MyCLI: AsyncParsableCommand { mutating func run() async throws { print("I'm working!") } }

3. Run the program and see only help text show up instead of "I'm Working!"

Expected behavior

I'd expect when running swift run MyCLI that i would see "I'm working!" in the terminal.

Actual behavior

Right now this always displays the help text.

[sgade]

Same with Swift 5.10. Using ParsableCommand works just fine.

[rgoldberg]

Have you tried removing mutating?

[myleshyson]

Yea. Same result unfortunately.

[rgoldberg]

My code structured like the following works when running command sub. It uses Swift Argument Parser 1.5.0 on Swift 5.7.1 targeting macOS 10.15+. I do not have mutating anywhere in my code:

import ArgumentParser

@main
struct Command: AsyncParsableCommand {
    static let configuration = CommandConfiguration(
        abstract: "…",
        subcommands: [
            Sub.self
        ]
    )
}

extension Command {
    struct Sub: AsyncParsableCommand {
        func run() async throws {
            try await …
        }
    }
}