A trash command as a Swift script.

trash.swift

#!/usr/bin/xcrun swift

import Dispatch
import Cocoa

dispatch_async(dispatch_get_main_queue()) {
    let URLsToRecycle = Array(dropFirst(Process.arguments)).map { NSURL(fileURLWithPath: $0) }
    
    NSWorkspace.sharedWorkspace().recycleURLs(URLsToRecycle) { dict, error in
        let recycledURLs = Array(dict.keys) as [NSURL]
        
        if error != nil {
            // Couldn't make this work, sadly—compiler crash.
            // var errstream = NSFileHandle.fileHandleWithStandardError()
            
            println("\(error.localizedDescription)"/*, &errstream*/)
            println(""/*, &errstream*/)
            println("Files that were not trashed:"/*, &errstream*/)
            for URL in URLsToRecycle {
                if !contains(recycledURLs, URL) {
                    println("\(URL.path)"/*, &errstream*/)
                }
            }
            exit(1)
        }
        else {
            exit(0)
        }
    }
}

NSRunLoop.currentRunLoop().run()

// extension NSFileHandle: OutputStreamType {
//     public func write(str: String) {
//         let data = str.dataUsingEncoding(NSUTF8StringEncoding)
//         self.writeData(data)
//     }
// }

Excellent, I really don't like using "rm" on the command line. With this script I can at least undo my mistakes.

I made a version of this at https://gist.github.com/kareman/322c1091f3cc7e1078af using the SwiftShell framework.