├── .gitignore
├── Package.swift
├── README.md
└── Sources
    └── main.swift


/.gitignore:
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1 | .DS_Store
2 | /.build
3 | /Packages
4 | /*.xcodeproj
5 | 


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/Package.swift:
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 1 | // swift-tools-version:4.2
 2 | // The swift-tools-version declares the minimum version of Swift required to build this package.
 3 | 
 4 | import PackageDescription
 5 | 
 6 | let package = Package(
 7 |     name: "DarkModeListener",
 8 |     products: [
 9 |         .executable(name: "dark-mode-listener", targets: ["dark-mode-listener"]),
10 |     ],
11 |     targets: [
12 |         .target(name: "dark-mode-listener", path: "Sources"),
13 |     ]
14 | )
15 | 


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/README.md:
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 1 | # DarkModeListener
 2 | 
 3 | A small cli tool to listen to dark mode changes on macOS Mojave.
 4 | 
 5 | ## Installation
 6 | 
 7 | Installation via [Mint](https://github.com/yonaskolb/Mint):
 8 | 
 9 | ```sh
10 | mint install LinusU/DarkModeListener
11 | ```
12 | 
13 | ## Usage
14 | 
15 | ```sh
16 | $ dark-mode-listener
17 | light
18 | dark
19 | light
20 | ...
21 | ```
22 | 
23 | The program will start by printing a line with either `light` or `dark` depending on the current active mode. It will then print a new line whenever the value changes.
24 | 


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/Sources/main.swift:
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 1 | import Foundation
 2 | 
 3 | class Main: NSObject {
 4 |     override init() {
 5 |         super.init()
 6 |         UserDefaults.standard.addObserver(self, forKeyPath: "AppleInterfaceStyle", options: [.initial, .new], context: nil)
 7 |     }
 8 | 
 9 |     override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
10 |         let value = (change![.newKey] as? String)?.lowercased() ?? "light"
11 |         print(value)
12 |     }
13 | }
14 | 
15 | // Disable buffering of stdout
16 | setbuf(__stdoutp, nil)
17 | 
18 | let main = Main()
19 | RunLoop.main.run()
20 | 


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