Added option to use InMemory CoreData for logs

Sources/Pulse/LoggerStore/LoggerStore+Configuration.swift

@@ -39,6 +39,13 @@ extension LoggerStore {
         /// Opens store in a readonly mode. It won't perform sweeps and will
         /// disallow any other modifications.
         public static let readonly = Options(rawValue: 1 << 3)
+
+        /// Logs are not persistent on the device storage and new log file is created on each app session.
+        /// Core Data is configured with container type as `NSInMemoryStoreType
+        ///
+        /// - warning: This options is not recommended for general use. Use it only when persistent logs do not suite
+        /// your use case, eg. for security reasons you can not store user logs on device storage
+        public static let inMemory = Options(rawValue: 1 << 4)
     }
 
     /// The store configuration.

Sources/Pulse/LoggerStore/LoggerStore.swift

@@ -167,7 +167,7 @@ public final class LoggerStore: @unchecked Sendable, Identifiable {
             self.manifest = .init(storeId: info.storeId, version: try Version(string: info.storeVersion))
         }
 
-        self.container = LoggerStore.makeContainer(databaseURL: databaseURL)
+        self.container = LoggerStore.makeContainer(databaseURL: databaseURL, options: options)
         try container.loadStore()
         self.backgroundContext = container.newBackgroundContext()
 
@@ -245,10 +245,11 @@ public final class LoggerStore: @unchecked Sendable, Identifiable {
         self.configuration = .init()
     }
 
-    private static func makeContainer(databaseURL: URL) -> NSPersistentContainer {
+    private static func makeContainer(databaseURL: URL, options: Options) -> NSPersistentContainer {
         let container = NSPersistentContainer(name: databaseURL.lastPathComponent, managedObjectModel: Self.model)
         let store = NSPersistentStoreDescription(url: databaseURL)
         store.setValue("DELETE" as NSString, forPragmaNamed: "journal_mode")
+        store.type = options.contains(.inMemory) ? NSInMemoryStoreType : NSSQLiteStoreType
         container.persistentStoreDescriptions = [store]
         return container
     }

Tests/PulseTests/LoggerStoreTests.swift

@@ -44,6 +44,23 @@ final class LoggerStoreTests: LoggerStoreBaseTests {
         try? secondStore.destroy()
     }
 
+    func testInitCreateInMemoryStore() throws {
+        // GIVEN
+        let storeURL = directory.url.appending(filename: UUID().uuidString)
+        let options: LoggerStore.Options = [.create, .synchronous, .inMemory]
+
+        // WHEN
+        let store = try LoggerStore(storeURL: storeURL, options: options)
+        populate(store: store)
+
+        // THEN data is NOT persisted
+        let databaseURL = storeURL.appending(filename: "logs.sqlite")
+        XCTAssertFalse(FileManager.default.fileExists(atPath: databaseURL.path))
+
+        // CLEANUP
+        try? store.destroy()
+    }
+
     func testInitCreateStoreIntermediateDirectoryMissing() throws {
         // GIVEN
         let storeURL = directory.url