Displays a progress indicator on a file in the Finder.

DownloadProgressIndicatorDemo.swift

import Foundation

let progress = Progress(parent: nil, userInfo: [
    .fileOperationKindKey: Progress.FileOperationKind.downloading,
    .fileURLKey: URL(fileURLWithPath: "/Users/mminer/Downloads/somefile.zip"),
])

progress.isCancellable = true
progress.isPausable = false
progress.kind = .file
progress.totalUnitCount = 10
progress.publish()

// Simulate downloading a file.
DispatchQueue.main.asyncAfter(deadline: .now() + 1) { progress.completedUnitCount = 1 }
DispatchQueue.main.asyncAfter(deadline: .now() + 2) { progress.completedUnitCount = 2 }
DispatchQueue.main.asyncAfter(deadline: .now() + 3) { progress.completedUnitCount = 3 }
DispatchQueue.main.asyncAfter(deadline: .now() + 4) { progress.completedUnitCount = 4 }
DispatchQueue.main.asyncAfter(deadline: .now() + 5) { progress.completedUnitCount = 5 }
RunLoop.current.run()

It's been a while since I wrote this code, but I believe it's a snippet from a larger program and wasn't intended as a standalone script. Sorry for the confusion. Using a RunLoop looks like the right approach.

@dinneo: I updated the snippet with @amomchilov's suggestion and it should run fine now from the command line (provided you substitute the file path on line 5 with one that exists on your own machine).

swift DownloadProgressIndicatorDemo.swift