Fix problem report logs being duplicated

ios/MullvadVPN/AppDelegate.swift

@@ -353,7 +353,9 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
 
     private func configureLogging() {
         var loggerBuilder = LoggerBuilder(header: "MullvadVPN version \(Bundle.main.productVersion)")
-        loggerBuilder.addFileOutput(fileURL: ApplicationConfiguration.newLogFileURL(for: .mainApp))
+        loggerBuilder.addFileOutput(
+            fileURL: ApplicationConfiguration.newLogFileURL(for: .mainApp, in: ApplicationConfiguration.containerURL)
+        )
         #if DEBUG
         loggerBuilder.addOSLogOutput(subsystem: ApplicationTarget.mainApp.bundleIdentifier)
         #endif

ios/MullvadVPN/View controllers/ProblemReport/ProblemReportInteractor.swift

@@ -24,7 +24,9 @@ final class ProblemReportInteractor {
             redactContainerPathsForSecurityGroupIdentifiers: [securityGroupIdentifier]
         )
 
-        let logFileURLs = ApplicationTarget.allCases.flatMap { ApplicationConfiguration.logFileURLs(for: $0) }
+        let logFileURLs = ApplicationTarget.allCases.flatMap {
+            ApplicationConfiguration.logFileURLs(for: $0, in: ApplicationConfiguration.containerURL)
+        }
         report.addLogFiles(fileURLs: logFileURLs)
 
         return report

ios/MullvadVPNTests/MullvadLogging/LogRotationTests.swift

@@ -11,17 +11,18 @@ import XCTest
 
 final class LogRotationTests: XCTestCase {
     let fileManager = FileManager.default
-    let directoryPath = FileManager.default.temporaryDirectory.appendingPathComponent("LogRotationTests")
+    let directoryPath = FileManager.default.temporaryDirectory
+        .appendingPathComponent("LogRotationTests", isDirectory: true)
 
     override func setUpWithError() throws {
         try? fileManager.createDirectory(
             at: directoryPath,
-            withIntermediateDirectories: false
+            withIntermediateDirectories: true
         )
     }
 
     override func tearDownWithError() throws {
-        try fileManager.removeItem(atPath: directoryPath.relativePath)
+        try fileManager.removeItem(at: directoryPath)
     }
 
     func testRotatingActiveLogWhenSizeLimitIsExceeded() throws {

ios/MullvadVPNTests/MullvadLogging/LoggingTests.swift

@@ -11,25 +11,24 @@ import Foundation
 import XCTest
 
 class MullvadLoggingTests: XCTestCase {
-    func temporaryFileURL() -> URL {
-        // Create a URL for an unique file in the system's temporary directory.
-        let directory = NSTemporaryDirectory()
-        let filename = UUID().uuidString
-        let fileURL = URL(fileURLWithPath: directory).appendingPathComponent(filename)
-
-        // Add a teardown block to delete any file at `fileURL`.
-        addTeardownBlock {
-            try? FileManager.default.removeItem(at: fileURL)
-        }
+    let fileManager = FileManager.default
+    let directoryPath = FileManager.default.temporaryDirectory.appendingPathComponent("LoggingTests", isDirectory: true)
+
+    override func setUpWithError() throws {
+        try fileManager.createDirectory(
+            at: directoryPath,
+            withIntermediateDirectories: true
+        )
+    }
 
-        // Return the temporary file URL for use in a test method.
-        return fileURL
+    override func tearDownWithError() throws {
+        try fileManager.removeItem(at: directoryPath)
     }
 
     func testLogFileOutputStreamWritesHeader() throws {
         let headerText = "This is a header"
         let logMessage = "And this is a log message\n"
-        let fileURL = temporaryFileURL()
+        let fileURL = directoryPath.appendingPathComponent(UUID().uuidString)
         let stream = LogFileOutputStream(fileURL: fileURL, header: headerText)
         stream.write(logMessage)
         sync()
@@ -42,7 +41,7 @@ class MullvadLoggingTests: XCTestCase {
         let expectedHeader = "Header of a log file"
 
         var builder = LoggerBuilder(header: expectedHeader)
-        let fileURL = temporaryFileURL()
+        let fileURL = directoryPath.appendingPathComponent(UUID().uuidString)
         builder.addFileOutput(fileURL: fileURL)
 
         builder.install()
@@ -55,4 +54,30 @@ class MullvadLoggingTests: XCTestCase {
 
         XCTAssert(contents.hasPrefix(expectedHeader))
     }
+
+    func testGettingLogFilesByApplicationTarget() async throws {
+        let mainTargetLog = ApplicationConfiguration.newLogFileURL(for: .mainApp, in: directoryPath)
+        let packetTunnelTargetLog = ApplicationConfiguration.newLogFileURL(for: .packetTunnel, in: directoryPath)
+
+        let logPaths = [
+            directoryPath.appendingPathComponent("test1.log"),
+            directoryPath.appendingPathComponent("test2.log"),
+            mainTargetLog,
+            packetTunnelTargetLog,
+        ]
+
+        logPaths.forEach { url in
+            let stream = LogFileOutputStream(fileURL: url, header: "")
+            stream.write("test")
+            sync()
+        }
+
+        var urls = ApplicationConfiguration.logFileURLs(for: .mainApp, in: directoryPath)
+        XCTAssertEqual(urls.count, 1)
+        XCTAssertEqual(urls.first, mainTargetLog)
+
+        urls = ApplicationConfiguration.logFileURLs(for: .packetTunnel, in: directoryPath)
+        XCTAssertEqual(urls.count, 1)
+        XCTAssertEqual(urls.first, packetTunnelTargetLog)
+    }
 }

ios/PacketTunnel/PacketTunnelProvider/PacketTunnelProvider.swift

@@ -163,7 +163,12 @@ extension PacketTunnelProvider {
         var loggerBuilder = LoggerBuilder(header: "PacketTunnel version \(Bundle.main.productVersion)")
         let pid = ProcessInfo.processInfo.processIdentifier
         loggerBuilder.metadata["pid"] = .string("\(pid)")
-        loggerBuilder.addFileOutput(fileURL: ApplicationConfiguration.newLogFileURL(for: .packetTunnel))
+        loggerBuilder.addFileOutput(
+            fileURL: ApplicationConfiguration.newLogFileURL(
+                for: .packetTunnel,
+                in: ApplicationConfiguration.containerURL
+            )
+        )
         #if DEBUG
         loggerBuilder.addOSLogOutput(subsystem: ApplicationTarget.packetTunnel.bundleIdentifier)
         #endif

ios/Shared/ApplicationConfiguration.swift

@@ -21,25 +21,25 @@ enum ApplicationConfiguration {
         FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: securityGroupIdentifier)!
     }
 
-    /// Returns URL for new log file associated with application target and located within shared container.
-    static func newLogFileURL(for target: ApplicationTarget) -> URL {
+    /// Returns URL for new log file associated with application target and located within the specified container.
+    static func newLogFileURL(for target: ApplicationTarget, in containerURL: URL) -> URL {
         containerURL.appendingPathComponent(
             "\(target.bundleIdentifier)_\(Date().logFileFormatted).log",
             isDirectory: false
         )
     }
 
-    /// Returns URLs for log files associated with application target and located within shared container.
-    static func logFileURLs(for target: ApplicationTarget) -> [URL] {
+    /// Returns URLs for log files associated with application target and located within the specified container.
+    static func logFileURLs(for target: ApplicationTarget, in containerURL: URL) -> [URL] {
         let fileManager = FileManager.default
-        let containerUrl = containerURL
         let filePathsInDirectory = try? fileManager.contentsOfDirectory(atPath: containerURL.relativePath)
 
         let filteredFilePaths: [URL] = filePathsInDirectory?.compactMap { path in
             let pathIsLog = path.split(separator: ".").last == "log"
-            let pathBelongsToTarget = path.contains(target.bundleIdentifier)
+            // Pattern should be "<Target Bundle ID>_", eg. "net.mullvad.MullvadVPN_".
+            let pathBelongsToTarget = path.contains("\(target.bundleIdentifier)_")
 
-            return pathIsLog && pathBelongsToTarget ? containerUrl.appendingPathComponent(path) : nil
+            return pathIsLog && pathBelongsToTarget ? containerURL.appendingPathComponent(path) : nil
         } ?? []
 
         let sortedFilePaths = try? filteredFilePaths.sorted { path1, path2 in