swift-ui-commandline-tool.swift

#!/usr/bin/env xcrun -sdk macosx swift

// Displays UI in an NSWindow which can interact with the commandline
// Usage: `echo "Bar" | ./swift-ui-commandline-tool.swift`

import Foundation
import SwiftUI

extension CommandLine {
  static let input: String = { AnyIterator { readLine() }.joined() }()
}

struct App: SwiftUI.App {
  var body: some Scene {
    WindowGroup {
      VStack {
        Text("Hello, George!")
        Button("Print \"Foo\"") { print("Foo") }
        Button("Echo Input") { print(CommandLine.input) }
        Button("Done") { exit(0) }
      }
        .padding(100)
    }
      .windowStyle(HiddenTitleBarWindowStyle())
  }
}
App.main()

This is amazing. Thank you!

Happy to help, this code is a bit old so thank you for checking it still works :)

Very cool! For me the window wouldn't open unless:

DispatchQueue.main.async {
    NSApplication.shared.setActivationPolicy(.regular)
    NSApplication.shared.activate(ignoringOtherApps: true)
}
App.main()

Thanks! Yeah I haven't re-ran this in some time so it probably is a bit out of date.