Extract WireGuardGo version at build time.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

WireGuard/Coordinators/AppCoordinator+SettingsTableViewControllerDelegate.swift

@@ -12,26 +12,6 @@ enum GoVersionCoordinatorError: Error {
 }
 
 extension AppCoordinator: SettingsTableViewControllerDelegate {
-    func goVersionInformation() -> Promise<String> {
-        return Promise(resolver: { (resolver) in
-            guard let session = self.providerManagers?.first(where: { $0.isEnabled })?.connection as? NETunnelProviderSession else {
-                resolver.reject(GoVersionCoordinatorError.noEnabledSession)
-                return
-            }
-            do {
-                try session.sendProviderMessage(ExtensionMessage.requestVersion.data, responseHandler: { (data) in
-                    guard let data = data, let responseString = String(data: data, encoding: .utf8) else {
-                        resolver.reject(GoVersionCoordinatorError.noResponse)
-                        return
-                    }
-                    resolver.fulfill(responseString)
-                })
-            } catch {
-                resolver.reject(error)
-            }
-        })
-    }
-
     func exportTunnels(settingsTableViewController: SettingsTableViewController, sourceView: UIView) {
         self.exportConfigs(sourceView: sourceView)
     }

WireGuard/Coordinators/AppCoordinator.swift

@@ -329,7 +329,9 @@ class AppCoordinator: RootViewCoordinator { // swiftlint:disable:this type_body_
 
     func connect(tunnel: Tunnel) {
         _ = refreshProviderManagers().then { () -> Promise<Void> in
-            let manager = self.providerManager(for: tunnel)!
+            guard let manager = self.providerManager(for: tunnel) else {
+                return Promise.value(())
+            }
             let block = {
                 switch manager.connection.status {
                 case .invalid, .disconnected:
@@ -411,6 +413,26 @@ class AppCoordinator: RootViewCoordinator { // swiftlint:disable:this type_body_
             return tunnelIdentifier == tunnel.tunnelIdentifier
         }
     }
+
+    func extensionGoVersionInformation() -> Promise<String> {
+        return Promise(resolver: { (resolver) in
+            guard let session = self.providerManagers?.first(where: { $0.isEnabled })?.connection as? NETunnelProviderSession else {
+                resolver.reject(GoVersionCoordinatorError.noEnabledSession)
+                return
+            }
+            do {
+                try session.sendProviderMessage(ExtensionMessage.requestVersion.data, responseHandler: { (data) in
+                    guard let data = data, let responseString = String(data: data, encoding: .utf8) else {
+                        resolver.reject(GoVersionCoordinatorError.noResponse)
+                        return
+                    }
+                    resolver.fulfill(responseString)
+                })
+            } catch {
+                resolver.reject(error)
+            }
+        })
+    }
 }
 
 class AppDocumentPickerDelegate: NSObject, UIDocumentPickerDelegate {

WireGuard/Info.plist

@@ -67,6 +67,8 @@
 	<string>6.0</string>
 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
+	<key>WireGuardGoVersion</key>
+	<string>unknown</string>
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>

WireGuard/ViewControllers/SetttingsTableViewController.swift

@@ -11,7 +11,6 @@ enum GoVersionError: Error {
 
 protocol SettingsTableViewControllerDelegate: class {
     func exportTunnels(settingsTableViewController: SettingsTableViewController, sourceView: UIView)
-    func goVersionInformation() -> Promise<String>
 }
 
 class SettingsTableViewController: UITableViewController {
@@ -27,24 +26,7 @@ class SettingsTableViewController: UITableViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
         versionInfoLabel.text = versionInformation
-        _ = firstly { () -> Promise<String> in
-            self.goVersionInfoLabel.text = NSLocalizedString("Loading...", comment: "")
-            return goVersionInformation()
-        }.then { (goVersion: String) -> Guarantee<Void> in
-            if let label = self.goVersionInfoLabel {
-                label.text = goVersion
-            }
-            return Guarantee.value(())
-            }.recover({ (error) in
-                switch error {
-                case GoVersionCoordinatorError.noEnabledSession:
-                    self.goVersionInfoLabel.text = NSLocalizedString("Unavailable", comment: "")
-                    self.showNotEnabledAlert()
-                default:
-                    self.goVersionInfoLabel.text = NSLocalizedString("Unknown", comment: "")
-                }
-
-            })
+        goVersionInfoLabel.text = goVersionInformation
     }
 
     override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
@@ -72,8 +54,8 @@ class SettingsTableViewController: UITableViewController {
         return versionElements.joined(separator: " ")
     }
 
-    func goVersionInformation() -> Promise<String> {
-        return self.delegate?.goVersionInformation() ?? Promise(error: GoVersionError.noDelegate)
+    var goVersionInformation: String {
+        return Bundle.main.infoDictionary!["WireGuardGoVersion"] as? String ?? "Unknown!!!"
     }
 
     private func showNotEnabledAlert() {