BetaFlags: FeatureFlags which are automatically false for AppStore builds.

README.md

BetaFlags: FeatureFlags which are automatically false for AppStore builds.

BetaFlags.swift

import UIKit
import PlaygroundSupport


// FeatureFlags vs. "BetaFlags".  BetaFlags are automatically false for AppStore builds, which provides
// an extra level of safety against accidentally shipping a build which has beta features enabled.


struct FeatureFlags {
    // Set to false to disable support for fancy doors.
    public static var HasGullWingDoors = true
    // Set to true to end humanity as we know it.
    public static var HasSkynetLevelAI = true
}


// Beta flags are automatically false in AppStore builds.
public struct BetaFlags {

    public init() {}

    public var hasRocketPoweredHangGliders: Bool {
        return _wrapped(flag: BetaFlags._HasRocketPoweredHangGliders)
    }

    public var hasNuclearTacoSeasoning: Bool {
        return _wrapped(flag: BetaFlags._HasNuclearTacoSeasoning)
    }

    // MARK: - Iternals

    private func _wrapped(flag: Bool) -> Bool {
        // Ensure we return false for all flags if this is an AppStore build.
        guard !BuildConfiguration.current.isAppStore else { return false }
        return flag
    }

    // Set to true to enable rocket-powered hang gliders.
    private static var _HasRocketPoweredHangGliders = false

    // Set to true to enable object reference counting console debugging.
    private static var _HasNuclearTacoSeasoning = false
}


// Based on http://stackoverflow.com/a/33830605/7543271
public enum BuildConfiguration: String {

    // "debug" indicates a build which:
    // - used the "Debug" Xcode configuration
    case debug

    // "appStore" indicates a build which:
    // - used the "Release" Xcode configuration
    // - was installed from the AppStore
    case appStore

    // "testFlight" indicates a build which:
    // - used the "Release" Xcode configuration
    // - was installed via TestFlight
    case testFlight


    public static var current: BuildConfiguration {
        if isDebug {
            return .debug
        } else if isTestFlight {
            return .testFlight
        } else {
            return .appStore
        }
    }

    public var isAppStore: Bool {
        switch self {
        case .debug, .testFlight:
            return false
        case .appStore:
            return true
        }
    }

    // Thanks to http://stackoverflow.com/a/26113597/7543271
    fileprivate static let isTestFlight = Bundle.main.appStoreReceiptURL?.lastPathComponent == "sandboxReceipt"

    fileprivate static var isDebug: Bool {
        #if DEBUG
        return true
        #else
        return false
        #endif
    }
}


// Usage:

class ViewController : UIViewController {
    override func viewDidLoad() {
        if FeatureFlags.HasSkynetLevelAI {
            // do some stuff
        }
    }
}

class ViewController2 : UIViewController {
    override func viewDidLoad() {
        if BetaFlags().hasNuclearTacoSeasoning {
            // do some stuff
        }
    }
}