Use App Group container for documents and caches

Passepartout/Sources/AppConstants.swift

@@ -97,7 +97,7 @@ class AppConstants {
         private static let fileName = "Debug.log"
         
         static var fileURL: URL {
-            return FileManager.default.userURL(for: .cachesDirectory, appending: fileName)
+            return GroupConstants.App.cachesURL.appendingPathComponent(fileName)
         }
 
         private static let console: ConsoleDestination = {

Passepartout/Sources/GroupConstants.swift

@@ -53,6 +53,25 @@ class GroupConstants {
         
         static let tunnelIdentifier = "com.algoritmico.macos.Passepartout.Tunnel"
         #endif
+
+        private static var containerURL: URL {
+            guard let url = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: appGroup) else {
+                fatalError("Unable to access App Group container")
+            }
+            return url
+        }
+
+        static let documentsURL: URL = {
+            let url = containerURL.appendingPathComponent("Documents", isDirectory: true)
+            try? FileManager.default.createDirectory(at: url, withIntermediateDirectories: true, attributes: nil)
+            return url
+        }()
+
+        static let cachesURL: URL = {
+            let url = containerURL.appendingPathComponent("Library/Caches", isDirectory: true)
+            try? FileManager.default.createDirectory(at: url, withIntermediateDirectories: true, attributes: nil)
+            return url
+        }()
     }
     
     class VPN {

Passepartout/Sources/Model/ConnectionService.swift

@@ -58,7 +58,11 @@ class ConnectionService: Codable {
     var directory: String? = nil
     
     var rootURL: URL {
-        return FileManager.default.userURL(for: .documentDirectory, appending: directory)
+        var url = GroupConstants.App.documentsURL
+        if let directory = directory {
+            url.appendPathComponent(directory)
+        }
+        return url
     }
     
     private var providersURL: URL {

Passepartout/Sources/Model/TransientStore.swift

@@ -36,7 +36,7 @@ class TransientStore {
     static let shared = TransientStore()
     
     private static var serviceURL: URL {
-        return FileManager.default.userURL(for: .documentDirectory, appending: AppConstants.Store.serviceFilename)
+        return GroupConstants.App.documentsURL.appendingPathComponent(AppConstants.Store.serviceFilename)
     }
     
     let service: ConnectionService

Passepartout/Sources/Services/InfrastructureFactory.swift

@@ -75,7 +75,7 @@ class InfrastructureFactory {
         }
         self.bundle = bundle
 
-        cachePath = FileManager.default.userURL(for: .cachesDirectory, appending: nil)
+        cachePath = GroupConstants.App.cachesURL
         cache = [:]
         lastUpdate = [:]
     }