trash.swift

#!/usr/bin/swift

import Cocoa
import Foundation

DispatchQueue.main.async {
  let arguments = CommandLine.arguments.dropFirst()
  let urls = arguments.map { URL(fileURLWithPath: $0) }

  #if swift(>=4.0)
  let workspace = NSWorkspace.shared
  #else
  let workspace = NSWorkspace.shared()
  #endif

  workspace.recycle(urls) { (dict, error) in
    let trashedURLs = dict.keys

    trashedURLs.forEach {
      print($0.path)
    }

    guard error != nil else {
      exit(0)
    }

    let untrashedURLs = urls.filter { !trashedURLs.contains($0) }

    untrashedURLs.forEach {
      fputs($0.path + "\n", stderr)
    }

    exit(1)
  }
}

RunLoop.main.run()