Extract archives in a separate directory from the input archive

Autoupdate/AppInstaller.m

@@ -59,6 +59,7 @@ @implementation AppInstaller
     NSString *_userName;
     SUHost *_host;
     NSString *_updateDirectoryPath;
+    NSString *_extractionDirectory;
     NSString *_downloadName;
     NSString *_decryptionPassword;
     SUSignatures *_signatures;
@@ -172,7 +173,8 @@ - (void)extractAndInstallUpdate SPU_OBJC_DIRECT
     [_communicator handleMessageWithIdentifier:SPUExtractionStarted data:[NSData data]];
 
     NSString *archivePath = [_updateDirectoryPath stringByAppendingPathComponent:_downloadName];
-    id<SUUnarchiverProtocol> unarchiver = [SUUnarchiver unarchiverForPath:archivePath updatingHostBundlePath:_host.bundlePath decryptionPassword:_decryptionPassword expectingInstallationType:_installationType];
+
+    id<SUUnarchiverProtocol> unarchiver = [SUUnarchiver unarchiverForPath:archivePath extractionDirectory:_extractionDirectory updatingHostBundlePath:_host.bundlePath decryptionPassword:_decryptionPassword expectingInstallationType:_installationType];
 
     NSError *unarchiverError = nil;
     BOOL success = NO;
@@ -213,7 +215,7 @@ - (void)extractAndInstallUpdate SPU_OBJC_DIRECT
                  [self->_communicator handleMessageWithIdentifier:SPUValidationStarted data:[NSData data]];
 
                  NSError *validationError = nil;
-                 BOOL validationSuccess = [self->_updateValidator validateWithUpdateDirectory:self->_updateDirectoryPath error:&validationError];
+                 BOOL validationSuccess = [self->_updateValidator validateWithUpdateDirectory:self->_extractionDirectory error:&validationError];
 
                  if (!validationSuccess) {
                      [self cleanupAndExitWithStatus:EXIT_FAILURE error:[NSError errorWithDomain:SUSparkleErrorDomain code:SPUInstallerError userInfo:@{ NSLocalizedDescriptionKey: @"Update validation was a failure", NSUnderlyingErrorKey: validationError }]];
@@ -263,6 +265,7 @@ - (void)unarchiverDidFailWithError:(NSError *)error SPU_OBJC_DIRECT
     // but may as well set other fields to nil too
     [self clearUpdateDirectory];
     _downloadName = nil;
+    _extractionDirectory = nil;
     _decryptionPassword = nil;
     _signatures = nil;
     _relaunchPath = nil;
@@ -453,13 +456,21 @@ - (void)handleMessageWithIdentifier:(int32_t)identifier data:(NSData *)data
                 return;
             }
 
+            NSString *extractionDirectory = [SPULocalCacheDirectory createUniqueDirectoryInDirectory:cacheInstallationPath];
+            if (extractionDirectory == nil) {
+                [self cleanupAndExitWithStatus:EXIT_FAILURE error:[NSError errorWithDomain:SUSparkleErrorDomain code:SPUInstallerError userInfo:@{ NSLocalizedDescriptionKey: [NSString stringWithFormat:@"Error: Failed to create installation extraction directory in %@", cacheInstallationPath] }]];
+
+                return;
+            }
+
             // Carry these properties separately rather than using the SUInstallationInputData object
             // Some of our properties may slightly differ than our input and we don't want to make the mistake of using one of those
             self->_installationType = installationType;
             self->_relaunchPath = installationData.relaunchPath;
             self->_downloadName = downloadName;
             self->_signatures = installationData.signatures;
             self->_updateDirectoryPath = cacheInstallationPath;
+            self->_extractionDirectory = extractionDirectory;
             self->_host = [[SUHost alloc] initWithBundle:hostBundle];
             self->_verifierInformation = [[SPUVerifierInformation alloc] initWithExpectedVersion:installationData.expectedVersion expectedContentLength:installationData.expectedContentLength];
 
@@ -521,7 +532,7 @@ - (void)startInstallation SPU_OBJC_DIRECT
 
     dispatch_async(_installerQueue, ^{
         NSError *installerError = nil;
-        id <SUInstallerProtocol> installer = [SUInstaller installerForHost:self->_host expectedInstallationType:self->_installationType updateDirectory:self->_updateDirectoryPath homeDirectory:self->_homeDirectory userName:self->_userName error:&installerError];
+        id <SUInstallerProtocol> installer = [SUInstaller installerForHost:self->_host expectedInstallationType:self->_installationType updateDirectory:self->_extractionDirectory homeDirectory:self->_homeDirectory userName:self->_userName error:&installerError];
 
         if (installer == nil) {
             dispatch_async(dispatch_get_main_queue(), ^{

Autoupdate/SUBinaryDeltaUnarchiver.h

@@ -19,7 +19,7 @@ SPU_OBJC_DIRECT_MEMBERS
 #endif
 @interface SUBinaryDeltaUnarchiver : NSObject <SUUnarchiverProtocol>
 
-- (instancetype)initWithArchivePath:(NSString *)archivePath updateHostBundlePath:(NSString *)updateHostBundlePath;
+- (instancetype)initWithArchivePath:(NSString *)archivePath extractionDirectory:(NSString *)extractionDirectory updateHostBundlePath:(NSString *)updateHostBundlePath;
 
 + (BOOL)canUnarchivePath:(NSString *)path;
 

Autoupdate/SUBinaryDeltaUnarchiver.m

@@ -20,6 +20,7 @@ @implementation SUBinaryDeltaUnarchiver
 {
     NSString *_archivePath;
     NSString *_updateHostBundlePath;
+    NSString *_extractionDirectory;
 }
 
 + (BOOL)canUnarchivePath:(NSString *)path
@@ -71,12 +72,13 @@ + (void)updateSpotlightImportersAtBundlePath:(NSString *)targetPath
     }
 }
 
-- (instancetype)initWithArchivePath:(NSString *)archivePath updateHostBundlePath:(NSString *)updateHostBundlePath
+- (instancetype)initWithArchivePath:(NSString *)archivePath extractionDirectory:(NSString *)extractionDirectory updateHostBundlePath:(NSString *)updateHostBundlePath
 {
     self = [super init];
     if (self != nil) {
         _archivePath = [archivePath copy];
         _updateHostBundlePath = [updateHostBundlePath copy];
+        _extractionDirectory = [extractionDirectory copy];
     }
     return self;
 }
@@ -94,7 +96,7 @@ - (void)unarchiveWithCompletionBlock:(void (^)(NSError * _Nullable))completionBl
 - (void)extractDeltaWithNotifier:(SUUnarchiverNotifier *)notifier
 {
     NSString *sourcePath = _updateHostBundlePath;
-    NSString *targetPath = [[_archivePath stringByDeletingLastPathComponent] stringByAppendingPathComponent:[sourcePath lastPathComponent]];
+    NSString *targetPath = [_extractionDirectory stringByAppendingPathComponent:[sourcePath lastPathComponent]];
 
     NSError *applyDiffError = nil;
     BOOL success = applyBinaryDelta(sourcePath, targetPath, _archivePath, NO, ^(double progress){

Autoupdate/SUDiskImageUnarchiver.h

@@ -18,7 +18,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 SPU_OBJC_DIRECT_MEMBERS @interface SUDiskImageUnarchiver : NSObject <SUUnarchiverProtocol>
 
-- (instancetype)initWithArchivePath:(NSString *)archivePath decryptionPassword:(nullable NSString *)decryptionPassword;
+- (instancetype)initWithArchivePath:(NSString *)archivePath extractionDirectory:(NSString *)extractionDirectory decryptionPassword:(nullable NSString *)decryptionPassword;
 
 + (BOOL)canUnarchivePath:(NSString *)path;
 

Autoupdate/SUDiskImageUnarchiver.m

@@ -19,6 +19,7 @@ @implementation SUDiskImageUnarchiver
 {
     NSString *_archivePath;
     NSString *_decryptionPassword;
+    NSString *_extractionDirectory;
 }
 
 + (BOOL)canUnarchivePath:(NSString *)path
@@ -31,12 +32,13 @@ + (BOOL)mustValidateBeforeExtraction
     return NO;
 }
 
-- (instancetype)initWithArchivePath:(NSString *)archivePath decryptionPassword:(nullable NSString *)decryptionPassword
+- (instancetype)initWithArchivePath:(NSString *)archivePath extractionDirectory:(NSString *)extractionDirectory decryptionPassword:(nullable NSString *)decryptionPassword
 {
     self = [super init];
     if (self != nil) {
         _archivePath = [archivePath copy];
         _decryptionPassword = [decryptionPassword copy];
+        _extractionDirectory = [extractionDirectory copy];
     }
     return self;
 }
@@ -171,7 +173,7 @@ - (void)extractDMGWithNotifier:(SUUnarchiverNotifier *)notifier SPU_OBJC_DIRECT
 		for (NSString *item in contents)
 		{
             NSString *fromPath = [mountPoint stringByAppendingPathComponent:item];
-            NSString *toPath = [[_archivePath stringByDeletingLastPathComponent] stringByAppendingPathComponent:item];
+            NSString *toPath = [_extractionDirectory stringByAppendingPathComponent:item];
 
             itemsCopied += 1.0;
             [notifier notifyProgress:0.5 + itemsCopied/(totalItems*2.0)];

Autoupdate/SUFlatPackageUnarchiver.h

@@ -16,7 +16,7 @@ NS_ASSUME_NONNULL_BEGIN
 // An unarchiver for flat packages that doesn't really do any unarchiving
 SPU_OBJC_DIRECT_MEMBERS @interface SUFlatPackageUnarchiver : NSObject <SUUnarchiverProtocol>
 
-- (instancetype)initWithFlatPackagePath:(NSString *)flatPackagePath expectingInstallationType:(NSString *)installationType;
+- (instancetype)initWithFlatPackagePath:(NSString *)flatPackagePath extractionDirectory:(NSString *)extractionDirectory expectingInstallationType:(NSString *)installationType;
 
 + (BOOL)canUnarchivePath:(NSString *)path;
 

Autoupdate/SUFlatPackageUnarchiver.m

@@ -20,6 +20,7 @@ @implementation SUFlatPackageUnarchiver
 {
     NSString *_flatPackagePath;
     NSString *_expectedInstallationType;
+    NSString *_extractionDirectory;
 }
 
 + (BOOL)canUnarchivePath:(NSString *)path
@@ -32,12 +33,13 @@ + (BOOL)mustValidateBeforeExtraction
     return YES;
 }
 
-- (instancetype)initWithFlatPackagePath:(NSString *)flatPackagePath expectingInstallationType:(NSString *)installationType
+- (instancetype)initWithFlatPackagePath:(NSString *)flatPackagePath extractionDirectory:(NSString *)extractionDirectory expectingInstallationType:(NSString *)installationType
 {
     self = [super init];
     if (self != nil) {
         _flatPackagePath = [flatPackagePath copy];
         _expectedInstallationType = [installationType copy];
+        _extractionDirectory = [extractionDirectory copy];
     }
     return self;
 }
@@ -53,8 +55,20 @@ - (void)unarchiveWithCompletionBlock:(void (^)(NSError * _Nullable))completionBl
     } else if (![[NSFileManager defaultManager] fileExistsAtPath:_flatPackagePath isDirectory:&isDirectory] || isDirectory) {
         [notifier notifyFailureWithError:[NSError errorWithDomain:SUSparkleErrorDomain code:SUUnarchivingError userInfo:@{ NSLocalizedDescriptionKey:[NSString stringWithFormat:@"Flat package does not exist at %@", _flatPackagePath]}]];
     } else {
-        [notifier notifyProgress:1.0];
-        [notifier notifySuccess];
+        // Copying the flat package should be very fast, especially on APFS
+        NSError *copyError = nil;
+        if (![[NSFileManager defaultManager] copyItemAtPath:_flatPackagePath toPath:[_extractionDirectory stringByAppendingPathComponent:_flatPackagePath.lastPathComponent] error:&copyError]) {
+            NSMutableDictionary *userInfoDictionary = [NSMutableDictionary dictionaryWithDictionary:@{ NSLocalizedDescriptionKey:[NSString stringWithFormat:@"Flat package (%@) cannot be copied to extraction directory (%@)", _flatPackagePath, _extractionDirectory]}];
+
+            if (copyError != nil) {
+                userInfoDictionary[NSUnderlyingErrorKey] = copyError;
+            }
+
+            [notifier notifyFailureWithError:[NSError errorWithDomain:SUSparkleErrorDomain code:SUUnarchivingError userInfo:userInfoDictionary]];
+        } else {
+            [notifier notifyProgress:1.0];
+            [notifier notifySuccess];
+        }
     }
 }
 

Autoupdate/SUInstaller.m

@@ -22,15 +22,6 @@
 
 @implementation SUInstaller
 
-+ (BOOL)isAliasFolderAtPath:(NSString *)path SPU_OBJC_DIRECT
-{
-    NSNumber *aliasFlag = nil;
-    [[NSURL fileURLWithPath:path] getResourceValue:&aliasFlag forKey:NSURLIsAliasFileKey error:nil];
-    NSNumber *directoryFlag = nil;
-    [[NSURL fileURLWithPath:path] getResourceValue:&directoryFlag forKey:NSURLIsDirectoryKey error:nil];
-    return aliasFlag.boolValue && directoryFlag.boolValue;
-}
-
 + (nullable NSString *)installSourcePathInUpdateFolder:(NSString *)inUpdateFolder forHost:(SUHost *)host
 #if SPARKLE_BUILD_PACKAGE_SUPPORT
                                              isPackage:(BOOL *)isPackagePtr isGuided:(BOOL *)isGuidedPtr
@@ -55,6 +46,34 @@ + (nullable NSString *)installSourcePathInUpdateFolder:(NSString *)inUpdateFolde
 
     while ((currentFile = [dirEnum nextObject])) {
         NSString *currentPath = [inUpdateFolder stringByAppendingPathComponent:currentFile];
+
+        // Ignore all symbolic links and aliases
+        {
+            NSURL *currentPathURL = [NSURL fileURLWithPath:currentPath];
+
+            NSNumber *symbolicLinkFlag = nil;
+            [currentPathURL getResourceValue:&symbolicLinkFlag forKey:NSURLIsSymbolicLinkKey error:NULL];
+            if (symbolicLinkFlag.boolValue) {
+                // NSDirectoryEnumerator won't recurse into symlinked directories
+                continue;
+            }
+
+            NSNumber *aliasFlag = nil;
+            [currentPathURL getResourceValue:&aliasFlag forKey:NSURLIsAliasFileKey error:NULL];
+
+            if (aliasFlag.boolValue) {
+                NSNumber *directoryFlag = nil;
+                [currentPathURL getResourceValue:&directoryFlag forKey:NSURLIsDirectoryKey error:NULL];
+
+                // Some DMGs have symlinks into /Applications! That's no good!
+                if (directoryFlag.boolValue) {
+                    [dirEnum skipDescendents];
+                }
+
+                continue;
+            }
+        }
+
         NSString *currentFilename = [currentFile lastPathComponent];
 #if SPARKLE_BUILD_PACKAGE_SUPPORT
         NSString *currentExtension = [currentFile pathExtension];
@@ -92,10 +111,6 @@ + (nullable NSString *)installSourcePathInUpdateFolder:(NSString *)inUpdateFolde
                 break;
             }
         }
-
-        // Some DMGs have symlinks into /Applications! That's no good!
-        if ([self isAliasFolderAtPath:currentPath])
-            [dirEnum skipDescendents];
     }
 
 #if SPARKLE_BUILD_PACKAGE_SUPPORT

Autoupdate/SUPipedUnarchiver.h

@@ -16,7 +16,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 SPU_OBJC_DIRECT_MEMBERS @interface SUPipedUnarchiver : NSObject <SUUnarchiverProtocol>
 
-- (instancetype)initWithArchivePath:(NSString *)archivePath;
+- (instancetype)initWithArchivePath:(NSString *)archivePath extractionDirectory:(NSString *)extractionDirectory;
 
 + (BOOL)canUnarchivePath:(NSString *)path;
 

Autoupdate/SUPipedUnarchiver.m

@@ -17,6 +17,7 @@
 @implementation SUPipedUnarchiver
 {
     NSString *_archivePath;
+    NSString *_extractionDirectory;
 }
 
 static NSArray <NSString *> * _Nullable _commandAndArgumentsConformingToTypeOfPath(NSString *path)
@@ -59,11 +60,12 @@ + (BOOL)mustValidateBeforeExtraction
     return NO;
 }
 
-- (instancetype)initWithArchivePath:(NSString *)archivePath
+- (instancetype)initWithArchivePath:(NSString *)archivePath extractionDirectory:(NSString *)extractionDirectory
 {
     self = [super init];
     if (self != nil) {
         _archivePath = [archivePath copy];
+        _extractionDirectory = [extractionDirectory copy];
     }
     return self;
 }
@@ -89,7 +91,7 @@ - (void)extractArchivePipingDataToCommand:(NSString *)command arguments:(NSArray
 {
     // *** GETS CALLED ON NON-MAIN THREAD!!!
 	@autoreleasepool {
-        NSString *destination = [_archivePath stringByDeletingLastPathComponent];
+        NSString *destination = _extractionDirectory;
 
         SULog(SULogLevelDefault, @"Extracting using '%@' '%@' < '%@' '%@'", command, [args componentsJoinedByString:@"' '"], _archivePath, destination);
 

Autoupdate/SUUnarchiver.h

@@ -14,7 +14,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 SPU_OBJC_DIRECT_MEMBERS @interface SUUnarchiver : NSObject
 
-+ (nullable id <SUUnarchiverProtocol>)unarchiverForPath:(NSString *)path updatingHostBundlePath:(nullable NSString *)hostPath decryptionPassword:(nullable NSString *)decryptionPassword expectingInstallationType:(NSString *)installationType;
++ (nullable id <SUUnarchiverProtocol>)unarchiverForPath:(NSString *)path extractionDirectory:(NSString *)extractionDirectory updatingHostBundlePath:(nullable NSString *)hostPath decryptionPassword:(nullable NSString *)decryptionPassword expectingInstallationType:(NSString *)installationType;
 
 @end
 

Autoupdate/SUUnarchiver.m

@@ -18,27 +18,25 @@
 
 @implementation SUUnarchiver
 
-+ (nullable id <SUUnarchiverProtocol>)unarchiverForPath:(NSString *)path updatingHostBundlePath:(nullable NSString *)hostPath decryptionPassword:(nullable NSString *)decryptionPassword expectingInstallationType:(NSString *)installationType
++ (nullable id <SUUnarchiverProtocol>)unarchiverForPath:(NSString *)path extractionDirectory:(NSString *)extractionDirectory updatingHostBundlePath:(nullable NSString *)hostPath decryptionPassword:(nullable NSString *)decryptionPassword expectingInstallationType:(NSString *)installationType
 {
     if ([SUPipedUnarchiver canUnarchivePath:path]) {
-        return [[SUPipedUnarchiver alloc] initWithArchivePath:path];
-
+        return [[SUPipedUnarchiver alloc] initWithArchivePath:path extractionDirectory:extractionDirectory];
     }
 #if SPARKLE_BUILD_DMG_SUPPORT
     else if ([SUDiskImageUnarchiver canUnarchivePath:path]) {
-        return [[SUDiskImageUnarchiver alloc] initWithArchivePath:path decryptionPassword:decryptionPassword];
-
+        return [[SUDiskImageUnarchiver alloc] initWithArchivePath:path extractionDirectory:extractionDirectory decryptionPassword:decryptionPassword];
     }
 #endif
     else if ([SUBinaryDeltaUnarchiver canUnarchivePath:path]) {
         assert(hostPath != nil);
         NSString *nonNullHostPath = hostPath;
-        return [[SUBinaryDeltaUnarchiver alloc] initWithArchivePath:path updateHostBundlePath:nonNullHostPath];
+        return [[SUBinaryDeltaUnarchiver alloc] initWithArchivePath:path extractionDirectory:extractionDirectory updateHostBundlePath:nonNullHostPath];
     }
 #if SPARKLE_BUILD_PACKAGE_SUPPORT
     else if ([SUFlatPackageUnarchiver canUnarchivePath:path]) {
         // Flat packages are only supported for guided packaage installs
-        return [[SUFlatPackageUnarchiver alloc] initWithFlatPackagePath:path expectingInstallationType:installationType];
+        return [[SUFlatPackageUnarchiver alloc] initWithFlatPackagePath:path extractionDirectory:extractionDirectory expectingInstallationType:installationType];
     }
 #endif
     return nil;