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Github每日精选（第23期）：macOS下的开源清理工具lemon-cleaner
lemon-cleaner柠檬清理
lemon-cleaner柠檬清理，开源没几天就获得了3k个点赞，大家对macos下的清理工具兴趣还是很大的。github下的地址在这里。
腾讯柠檬清理是针对macOS系统专属制定的清理工具。主要功能包括重复文件和相似照片的识别、软件的定制化垃圾扫描、可视化的全盘空间分析、内存释放、浏览器隐私清理以及设备实时状态的监控等。重点聚焦清理功能，对上百款软件提供定制化的清理方案，提供专业的清理建议，帮助用户轻松完成一键式清理。
技术模块
- Lemon：主工程。
- LemonMonitor：状态栏。
- LemonBigOldFile：用于大文件清理。
- LemonDuplicateFile：用于重复文件清理。
- LemonPhotoClean：用于相似照片清理。
- LemonUninstaller：用于应用卸载。
- LemonPrivacyClean：用于隐私清理。
- LemonLoginItemManager：用于开机启动管理。
- LemonSpaceAnalyse：用于磁盘空间分析。
- LemonFileMove：用于文件搬家。
- LemonHardware：用于硬件信息获取。
- LemonNetSpeed：用于网络测速。
- LemonCleaner：用于实际清理操作。
主要代码分析
lemon-cleaner的主要代码分了几个部分，我们看两个部分的内容，1.他是怎么找到相同重复文件的，2.开机启动管理。LemonDuplicateFile用于重复文件清理
找重复文件一个好的方法就是文件的
md5。#pragma mark- #pragma mark 查找重复文件 // insert file to hash dictionary // key of dictionary is hash string // fileList是返回的 array - (void)insertHashDictionary:(NSArray *)fileList process:(float)process { @autoreleasepool { if ([fileList count] < 2) return; //resultDict 用 md5做 key,item 做 value NSMutableDictionary *resultDict = [NSMutableDictionary dictionary]; // 文件大小 uint32 chunkSize = 1024 * 1024; // 读取前面10MB数据 @try{ // for (QMFileItem *fileItem in fileList) { // // } if ([fileList count] == 0) return; // 多线程计算md5(前10m 的数据) // dispatch_apply 阻塞的 apply 对 sync group 的封装 dispatch_apply(fileList.count, dispatch_get_global_queue(0, 0), ^(size_t index) { @autoreleasepool{ if (index >= [fileList count]) { return; } QMFileItem *fileItem = [fileList objectAtIndex:index]; if (fileItem.hashStr) return; UInt64 fileSize = [fileItem fileSize]; NSFileHandle *innerFileHandle; innerFileHandle = [NSFileHandle fileHandleForReadingAtPath:fileItem.filePath]; NSString *md5Str = nil; @autoreleasepool{ NSMutableData *headData = [NSMutableData dataWithCapacity:MIN(fileSize, 10 * chunkSize)]; // 读取10m 的数据 uint64 offset = 0; NSData *readData = nil; do { @autoreleasepool{ @try { readData = [innerFileHandle readDataOfLength:chunkSize]; } @catch (NSException *exception) { NSLog(@"%s, exception = %@", __FUNCTION__, exception); readData = nil; } @finally { } if (readData) [headData appendData:readData]; else break; offset += [readData length]; [innerFileHandle seekToFileOffset:offset]; } } while ([readData length] > 0 && offset < 10 * chunkSize); [innerFileHandle closeFile]; if (headData.length == 0) return; if (!self->showDelegate) { self->_stopped = YES; return; } if (self.stopped) return; //计算 md5 md5Str = (__bridge_transfer NSString *) (FileMD5HashWithData(headData, 0)); // 小文件用 md5 做 hash, 大文件用 md5 + crc 做 hash } fileSize = [fileItem fileSize]; BOOL bigFile = NO; if (fileSize > 1024 * 1024 * 10) bigFile = YES; else fileItem.hashStr = md5Str; // 大文件需要计算crc if (bigFile) { // 头部hash和crc作为新的key dispatch_sync(self->md5Queue, ^{ NSMutableArray *sameHashArray = resultDict[md5Str]; if (sameHashArray == nil) { sameHashArray = [NSMutableArray arrayWithCapacity:10]; resultDict[md5Str] = sameHashArray; } [sameHashArray addObject:fileItem]; }); } } }); // 大文件进行crc算法比对 if (resultDict.count > 0) { for (NSString *md5Str in [resultDict allKeys]) { NSMutableArray *sameHashArray = resultDict[md5Str]; if ([sameHashArray count] <= 1) continue; for (QMFileItem *fileItem in sameHashArray) { @autoreleasepool{ // 计算文件的crc NSFileHandle *fileHandle = [NSFileHandle fileHandleForReadingAtPath:fileItem.filePath]; uLong crc = crc32(0L, Z_NULL, 0); uint64 offset = 0; uint32 itemChunkSize = 1024 * 1024; //Read 1M [fileHandle seekToFileOffset:10 * itemChunkSize]; NSData *data = [fileHandle readDataOfLength:itemChunkSize]; while ([data length] > 0) { @autoreleasepool { //Make sure for the next line you choose the appropriate string encoding. crc = crc32(crc, data.bytes, (uInt) data.length); /* PERFORM STRING PROCESSING HERE */ /* END STRING PROCESSING */ offset += [data length]; [fileHandle seekToFileOffset:offset]; data = [fileHandle readDataOfLength:itemChunkSize]; if (!showDelegate) { _stopped = YES; return; } // 显示文件比对进度. CFAbsoluteTime now = CFAbsoluteTimeGetCurrent(); if(now - _lastFileCompareTime >= 0.3){ NSString *dotString = @""; if(_compareDotNum % 3 == 0){ dotString = @"."; }else if(_compareDotNum % 3 == 1){ dotString = @".."; }else if(_compareDotNum % 3 == 2){ dotString = @"..."; } NSString *processString = [NSString stringWithFormat:NSLocalizedStringFromTableInBundle(@"QMDuplicateFiles_insertHashDictionary_NSString_1", nil, [NSBundle bundleForClass:[self class]], @""),[SizeHelper getFileSizeStringBySize:fileItem.fileSize], dotString]; if(showDelegate){ [showDelegate progressRate:process progressStr:processString]; } _lastFileCompareTime = now; _compareDotNum ++; } if (self.stopped) { return; } } } // 头部hash和crc作为新的key NSString *md5Hash = [NSString stringWithFormat:@"%@_%lu", md5Str, crc]; fileItem.hashStr = md5Hash; [fileHandle closeFile]; if (self.stopped) return; } } } } }@catch(NSException *exception){ NSLog(@"duplicate file compare error : %@", exception); }@finally{ } } }- 1
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LemonLoginItemManager用于开机启动管理
获取开机启动项的信息，在界面上添加。
#pragma mark -- Launch service /** 获取Launch plist数据 */ - (NSArray *)getLaunchServiceItems { NSFileManager *fileManager = [NSFileManager defaultManager]; NSMutableArray *launchServiceItemArray = [[NSMutableArray alloc]init]; for (NSString *directoryPath in self.launchServiceFilePathArray) { NSArray *fileNames = [fileManager contentsOfDirectoryAtPath:directoryPath error:NULL]; for (NSString *fileName in fileNames) { if ([self needFilterFile:fileName]) { continue; } if ([self.delegate respondsToSelector:@selector(needFilterLaunchServiceFile:)]) { if ([self.delegate needFilterLaunchServiceFile:fileName]) { continue; } } NSString *filePath = [directoryPath stringByAppendingPathComponent:fileName]; NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:filePath]; NSString *label = dict[LAUNCH_SERVICE_LABEL]; if (!label || [label isEqualToString:@""]) { continue; } QMAppLaunchItem *launchItem = [[QMAppLaunchItem alloc] initWithLaunchFilePath:filePath itemType:LoginItemTypeService]; launchItem.label = label; launchItem.isEnable = [self serviceIsEnabledWithItem:launchItem];; // NSLog(@"%s, launch login itme filePath : %@",__FUNCTION__, filePath); //将launch plist文件与App进行匹配； //1. 先通过bundleId进行匹配，如果plist文件名包含bundleId,则匹配成功 //2. 分析plist文件，与其中包含的App进行匹配 QMLocalApp *localApp = [self getAppInfoWithFileName:fileName]; if (localApp) { launchItem.appName = localApp.appName; launchItem.appPath = localApp.bundlePath; } else if(dict) { NSArray *array = dict[LAUNCH_SERVICE_PROGRAM_ARGUMENTS]; if(array && array.count > 0){ NSString *programPath = array[0]; //判断是否包含app if (([programPath containsString:@".app/"] || [programPath hasSuffix:@"app"])) { NSRange range = [programPath rangeOfString:@".app"]; if (range.location != NSNotFound) { NSUInteger index = range.location + 4; NSString *appPath = [programPath substringToIndex:index]; launchItem.appPath = appPath; launchItem.appName = [appPath lastPathComponent]; } } } } [launchServiceItemArray addObject:launchItem]; } } NSLog(@"%s, launchItemArray count : %lu",__FUNCTION__, (unsigned long)launchServiceItemArray.count); return launchServiceItemArray; }- 1
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添加各个部分：
#pragma mark -- handle data - (void)handleData { //以App进行分类：将同一个App的启动项包装成一个LMAppLoginItemInfo, //LMAppLoginItemInfo中添加launchd service item数据 for (QMBaseLoginItem *loginItem in self.launchItemArray) { if(loginItem.appName) { LMAppLoginItemInfo *itemInfo = [self getLoginItemInfoWithAppName:loginItem.appName]; itemInfo.appPath = loginItem.appPath; [itemInfo addLaunchItem:loginItem]; } else { //如果没有匹配到App，则归纳为未知应用 if (!self.otherLoginItemInfo) { NSString *localString = LMLocalizedString(@"LemonLoginItemManagerViewController_unknown_app", self.class); self.otherLoginItemInfo = [[LMAppLoginItemInfo alloc] initWithAppName:localString]; } [self.otherLoginItemInfo addLaunchItem:loginItem]; } } //添加app login item数据 for (QMBaseLoginItem *loginItem in self.appLoginItemArray) { LMAppLoginItemInfo *itemInfo = [self getLoginItemInfoWithAppName:loginItem.appName]; itemInfo.appPath = loginItem.appPath; [itemInfo addAppLoginItem:loginItem]; } //添加系统登录项数据 for (QMBaseLoginItem *loginItem in self.systemLoginItemArray) { LMAppLoginItemInfo *itemInfo = [self getLoginItemInfoWithAppName:loginItem.appName]; itemInfo.appPath = loginItem.appPath; [itemInfo addAppLoginItem:loginItem]; } //将未知应用添加到数据源末尾 if (self.otherLoginItemInfo) { [self.dataArray addObject:self.otherLoginItemInfo]; } for (LMAppLoginItemInfo *itemInfo in self.dataArray) { NSArray *loginItemDataArray = itemInfo.getLoginItemData; NSArray *launchItemDataArray = itemInfo.getLaunchItemData; //统计App启动项的数量 itemInfo.totalItemCount = loginItemDataArray.count + launchItemDataArray.count; [itemInfo updateEnableStatus]; //统计App启动项类型和数量，以及每类对应的数据 if (loginItemDataArray) { [itemInfo addAppLoginItemTypeInfoWithArray:loginItemDataArray]; } if (launchItemDataArray) { [itemInfo addLaunchItemTypeInfoWithArray:launchItemDataArray]; } } }- 1
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- 原文地址：https://blog.csdn.net/weixin_40425640/article/details/126029587
