Merge branch 'feature/migrate_to_ios_13_file_handle_methods' into develop

.travis.yml

@@ -1,5 +1,5 @@
 language: swift
-osx_image: xcode10.2
+osx_image: xcode11.2
 xcode_project: Logger.xcodeproj
-script: xcodebuild test -project Logger.xcodeproj -scheme Logger -destination 'platform=iOS Simulator,name=iPhone XS,OS=12.2'
+script: xcodebuild test -project Logger.xcodeproj -scheme Logger -destination 'platform=iOS Simulator,name=iPhone 11,OS=13.2'
 after_success: bash <(curl -s https://codecov.io/bash)

Logger.xcodeproj/project.pbxproj

@@ -370,7 +370,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -425,7 +425,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SDKROOT = iphoneos;

Logger/Loggers/DiskLogger/DiskLogger.swift

@@ -46,6 +46,7 @@ protocol LogrotateFactory {
 }
 
 /// Logger that writes messages into the file at specified URL with log rotation support.
+@available(OSX 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
 public final class DiskLogger: Logger {
     
     private let fileURL: URL
@@ -97,7 +98,7 @@ public final class DiskLogger: Logger {
                     try self.writeBuffer()
                 }
                 catch is SizeLimitedFileQuotaReached {
-                    self.closeSizeLimitedFile()
+                    try self.closeSizeLimitedFile()
                     try self.rotateLogFiles()
                     try self.openSizeLimitedFile()
                     try self.writeBuffer()
@@ -124,8 +125,8 @@ public final class DiskLogger: Logger {
         buffer.removeAll()
     }
     
-    private func closeSizeLimitedFile() {
+    private func closeSizeLimitedFile() throws {
-        self.sizeLimitedFile.synchronizeAndCloseFile()
+        try self.sizeLimitedFile.synchronizeAndCloseFile()
         self.sizeLimitedFile = nil
     }
     

Logger/Loggers/DiskLogger/OSFileHandle.swift

@@ -9,15 +9,45 @@
 import Foundation
 
 protocol OSFileHandle {
-    func seekToEndOfFile() -> UInt64
+    func osSeekToEndOfFile() throws -> UInt64
-    func swift_write(_ data: Data) throws
+    func osWrite(_ data: Data) throws
-    func synchronizeFile()
+    func osSynchronizeFile() throws
-    func closeFile()
+    func osCloseFile() throws
 }
 
 extension FileHandle: OSFileHandle {
     
-    func swift_write(_ data: Data) throws {
+    func osSeekToEndOfFile() throws -> UInt64 {
+        if #available(OSX 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) {
+            var offsetInFile: UInt64 = 0
+            try __seek(toEndReturningOffset:&offsetInFile)
+            return offsetInFile
+        } else {
+            fatalError()
+        }
+    }
+    
+    func osWrite(_ data: Data) throws {
+        if #available(OSX 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) {
             try __write(data, error: ())
+        } else {
+            fatalError()
+        }
+    }
+    
+    func osSynchronizeFile() throws {
+        if #available(OSX 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) {
+            try synchronize()
+        } else {
+            fatalError()
+        }
+    }
+    
+    func osCloseFile() throws {
+        if #available(OSX 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) {
+            try close()
+        } else {
+            fatalError()
+        }
     }
 }

Logger/Loggers/DiskLogger/SizeLimitedFile.swift

@@ -42,7 +42,7 @@ protocol SizeLimitedFile {
     func write(_ data: Data) throws
     
     /// Writes all in-memory data to permanent storage and closes the file.
-    func synchronizeAndCloseFile()
+    func synchronizeAndCloseFile() throws
 }
 
 /// Allows writing to a file while respecting allowed size limit.
@@ -61,7 +61,7 @@ final class SizeLimitedFileImpl {
     init(fileURL: URL, fileSizeLimit: UInt64, fileFactory: FileHandleFactory) throws {
         file = try fileFactory.makeInstance(forWritingTo: fileURL)
         self.sizeLimit = fileSizeLimit
-        currentSize = file.seekToEndOfFile()
+        currentSize = try file.osSeekToEndOfFile()
     }
 }
 
@@ -72,12 +72,12 @@ extension SizeLimitedFileImpl: SizeLimitedFile {
         guard currentSize + dataSize <= sizeLimit else {
             throw SizeLimitedFileQuotaReached()
         }
-        try file.swift_write(data)
+        try file.osWrite(data)
         currentSize += dataSize
     }
     
-    func synchronizeAndCloseFile() {
+    func synchronizeAndCloseFile() throws {
-        file.synchronizeFile()
+        try file.osSynchronizeFile()
-        file.closeFile()
+        try file.osCloseFile()
     }
 }

UnitTests/DiskLoggerTests.swift

@@ -30,6 +30,7 @@ class DiskLoggerTests: XCTestCase {
     let logURL = URL(fileURLWithPath: "/var/log/application.log")
     
     func testLoggingMessageToFile() {
+        if #available(OSX 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) {
             let expectation = XCTestExpectation(description: "write(_:) was called on SizeLimitedFile")
             expectation.expectedFulfillmentCount = 1
             
@@ -52,12 +53,14 @@ class DiskLoggerTests: XCTestCase {
             
             // "2018-08-30 17:23:11.514 <crit> DiskLoggerTests:46 testWritingMessageToFile() a message\n"
             let loggedMessage = String(decoding: sizeLimitedFileFactory.files[0].data, as: UTF8.self)
-        let expectedSuffix = " <crit> DiskLoggerTests:46 testLoggingMessageToFile() message\n"
+            let expectedSuffix = " <crit> DiskLoggerTests:47 testLoggingMessageToFile() message\n"
             
             XCTAssertTrue(loggedMessage.hasSuffix(expectedSuffix))
         }
+    }
     
     func testExceedingFileSizeLimit() {
+        if #available(OSX 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) {
             let expectation = XCTestExpectation(description: "write(_:) was called on SizeLimitedFile")
             expectation.expectedFulfillmentCount = 2
             
@@ -81,12 +84,14 @@ class DiskLoggerTests: XCTestCase {
             
             // "2018-08-31 18:29:34.748 <crit> DiskLoggerTests:75 testExceedingFileSizeLimit() 2st message\n"
             let loggedMessage = String(decoding: sizeLimitedFileFactory.files[1].data, as: UTF8.self)
-        let expectedSuffix = " <crit> DiskLoggerTests:75 testExceedingFileSizeLimit() 2st message\n"
+            let expectedSuffix = " <crit> DiskLoggerTests:78 testExceedingFileSizeLimit() 2st message\n"
             
             XCTAssertTrue(loggedMessage.hasSuffix(expectedSuffix))
         }
+    }
     
     func testErrorDuringLogProcess() {
+        if #available(OSX 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *) {
             let expectation = XCTestExpectation(description: "write(_:) was called on SizeLimitedFile")
             expectation.expectedFulfillmentCount = 2
             
@@ -114,6 +119,7 @@ class DiskLoggerTests: XCTestCase {
             
             XCTAssertTrue(loggedMessage.contains(expectedOccurence))
         }
+    }
 }
 
 private class FileManagerStub: OSFileManager {

UnitTests/SizeLimitedFileTests.swift

@@ -60,7 +60,7 @@ class SizeLimitedFileTests: XCTestCase {
     func testSynchronizingAndClosingFile() throws {
         let factory = FileMockFactory()
         let writer = try SizeLimitedFileImpl(fileURL: logURL, fileSizeLimit: 1, fileFactory: factory)
-        writer.synchronizeAndCloseFile()
+        try writer.synchronizeAndCloseFile()
         XCTAssertTrue(factory.mock.synchronizeFileCallCount == 1 && factory.mock.closeFileCallCount == 1)
     }
 }
@@ -89,19 +89,19 @@ private class FileMock: OSFileHandle {
     private(set) var synchronizeFileCallCount = 0
     private(set) var closeFileCallCount = 0
     
-    func seekToEndOfFile() -> UInt64 {
+    func osSeekToEndOfFile() throws -> UInt64 {
         return 0
     }
     
-    func swift_write(_ data: Data) throws {
+    func osWrite(_ data: Data) throws {
         self.writtenData.append(data)
     }
     
-    func synchronizeFile() {
+    func osSynchronizeFile() throws {
         synchronizeFileCallCount += 1
     }
     
-    func closeFile() {
+    func osCloseFile() throws {
         closeFileCallCount += 1
     }
 }