src/TGitCache/GITStatusCache.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // External Cache Copyright (C) 2005-2006,2008,2010,2014 - TortoiseSVN
   4 // Copyright (C) 2008-2019, 2021, 2023 - TortoiseGit
   5
   6 // This program is free software; you can redistribute it and/or
   7 // modify it under the terms of the GNU General Public License
   8 // as published by the Free Software Foundation; either version 2
   9 // of the License, or (at your option) any later version.
  10
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software Foundation,
  18 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 //
  20
  21 #include "stdafx.h"
  22 #include "GitAdminDir.h"
  23 #include "GitStatus.h"
  24 #include "GitStatusCache.h"
  25 #include "CacheInterface.h"
  26 #include <ShlObj.h>
  27 #include "PathUtils.h"
  28
  29 //////////////////////////////////////////////////////////////////////////
  30
  31 #define BLOCK_PATH_DEFAULT_TIMEOUT      600             // 10 minutes
  32 #define BLOCK_PATH_MAX_TIMEOUT          1200    // 20 minutes
  33
  34 #define CACHEDISKVERSION 2
  35
  36 #ifdef _WIN64
  37 #define STATUSCACHEFILENAME L"cache64"
  38 #else
  39 #define STATUSCACHEFILENAME L"cache"
  40 #endif
  41
  42 CGitStatusCache* CGitStatusCache::m_pInstance;
  43
  44 CGitStatusCache& CGitStatusCache::Instance()
  45 {
  46         ATLASSERT(m_pInstance);
  47         return *m_pInstance;
  48 }
  49
  50 void CGitStatusCache::Create()
  51 {
  52         ATLASSERT(!m_pInstance);
  53         m_pInstance = new CGitStatusCache;
  54
  55         m_pInstance->watcher.SetFolderCrawler(&m_pInstance->m_folderCrawler);
  56
  57         if (!CRegStdDWORD(L"Software\\TortoiseGit\\CacheSave", TRUE))
  58                 return;
  59
  60 #define LOADVALUEFROMFILE(x) if (fread(&x, sizeof(x), 1, pFile)!=1) goto exit;
  61 #define LOADVALUEFROMFILE2(x) if (fread(&x, sizeof(x), 1, pFile)!=1) goto error;
  62         unsigned int value = (unsigned int)-1;
  63         // find the location of the cache
  64         CString path = CPathUtils::GetLocalAppDataDirectory();
  65         CString path2;
  66         if (!path.IsEmpty())
  67         {
  68                 path += STATUSCACHEFILENAME;
  69                 // in case the cache file is corrupt, we could crash while
  70                 // reading it! To prevent crashing every time once that happens,
  71                 // we make a copy of the cache file and use that copy to read from.
  72                 // if that copy is corrupt, the original file won't exist anymore
  73                 // and the second time we start up and try to read the file,
  74                 // it's not there anymore and we start from scratch without a crash.
  75                 path2 = path;
  76                 path2 += L'2';
  77                 DeleteFile(path2);
  78                 CopyFile(path, path2, FALSE);
  79                 DeleteFile(path);
  80                 CAutoFILE pFile = _wfsopen(path2, L"rb", _SH_DENYWR);
  81                 if (pFile)
  82                 {
  83                         try
  84                         {
  85                                 LOADVALUEFROMFILE(value);
  86                                 if (value != CACHEDISKVERSION)
  87                                 {
  88                                         goto error;
  89                                 }
  90                                 int mapsize = 0;
  91                                 LOADVALUEFROMFILE(mapsize);
  92                                 for (int i=0; i<mapsize; ++i)
  93                                 {
  94                                         LOADVALUEFROMFILE2(value);
  95                                         if (value > MAX_PATH)
  96                                                 goto error;
  97                                         if (value)
  98                                         {
  99                                                 CString sKey;
 100                                                 if (fread(sKey.GetBuffer(value+1), sizeof(wchar_t), value, pFile) != value)
 101                                                 {
 102                                                         sKey.ReleaseBuffer(0);
 103                                                         goto error;
 104                                                 }
 105                                                 sKey.ReleaseBuffer(value);
 106                                                 auto cacheddir = std::make_unique<CCachedDirectory>();
 107                                                 if (!cacheddir.get() || !cacheddir->LoadFromDisk(pFile))
 108                                                 {
 109                                                         cacheddir.reset();
 110                                                         goto error;
 111                                                 }
 112                                                 CTGitPath KeyPath = CTGitPath(sKey);
 113                                                 if (m_pInstance->IsPathAllowed(KeyPath))
 114                                                 {
 115                                                         // only add the path to the watch list if it is versioned
 116                                                         if ((cacheddir->GetCurrentFullStatus() != git_wc_status_unversioned)&&(cacheddir->GetCurrentFullStatus() != git_wc_status_none))
 117                                                                 m_pInstance->watcher.AddPath(KeyPath, false);
 118
 119                                                         m_pInstance->m_directoryCache[KeyPath] = cacheddir.release();
 120
 121                                                         // do *not* add the paths for crawling!
 122                                                         // because crawled paths will trigger a shell
 123                                                         // notification, which makes the desktop flash constantly
 124                                                         // until the whole first time crawling is over
 125                                                         // m_pInstance->AddFolderForCrawling(KeyPath);
 126                                                 }
 127                                         }
 128                                 }
 129                         }
 130                         catch (CAtlException)
 131                         {
 132                                 goto error;
 133                         }
 134                 }
 135         }
 136 exit:
 137         DeleteFile(path2);
 138         m_pInstance->watcher.ClearInfoMap();
 139         CTraceToOutputDebugString::Instance()(__FUNCTION__ ": cache loaded from disk successfully!\n");
 140         return;
 141 error:
 142         DeleteFile(path2);
 143         m_pInstance->watcher.ClearInfoMap();
 144         Destroy();
 145         m_pInstance = new CGitStatusCache;
 146         CTraceToOutputDebugString::Instance()(__FUNCTION__ ": cache not loaded from disk\n");
 147 }
 148
 149 bool CGitStatusCache::SaveCache()
 150 {
 151         if (!CRegStdDWORD(L"Software\\TortoiseGit\\CacheSave", TRUE))
 152                 return false;
 153
 154 #define WRITEVALUETOFILE(x) if (fwrite(&x, sizeof(x), 1, pFile)!=1) goto error;
 155         // save the cache to disk
 156         // find a location to write the cache to
 157         CString path = CPathUtils::GetLocalAppDataDirectory();
 158         if (!path.IsEmpty())
 159         {
 160                 path += STATUSCACHEFILENAME;
 161                 CAutoFILE pFile = _wfsopen(path, L"wb", SH_DENYRW);
 162                 if (pFile)
 163                 {
 164                         unsigned int value = CACHEDISKVERSION;
 165                         WRITEVALUETOFILE(value);
 166                         value = static_cast<int>(m_pInstance->m_directoryCache.size());
 167                         WRITEVALUETOFILE(value);
 168                         for (auto I = m_pInstance->m_directoryCache.cbegin(); I != m_pInstance->m_directoryCache.cend(); ++I)
 169                         {
 170                                 if (!I->second)
 171                                 {
 172                                         value = 0;
 173                                         WRITEVALUETOFILE(value);
 174                                         continue;
 175                                 }
 176                                 const CString& key = I->first.GetWinPathString();
 177                                 value = key.GetLength();
 178                                 WRITEVALUETOFILE(value);
 179                                 if (value)
 180                                 {
 181                                         if (fwrite(static_cast<LPCWSTR>(key), sizeof(wchar_t), value, pFile) != value)
 182                                                 goto error;
 183                                         if (!I->second->SaveToDisk(pFile))
 184                                                 goto error;
 185                                 }
 186                         }
 187                 }
 188         }
 189         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": cache saved to disk at %s\n", static_cast<LPCWSTR>(path));
 190         return true;
 191 error:
 192         Destroy();
 193         DeleteFile(path);
 194         return false;
 195 }
 196
 197 void CGitStatusCache::Destroy()
 198 {
 199         if (m_pInstance)
 200         {
 201                 m_pInstance->Stop();
 202                 Sleep(100);
 203                 delete m_pInstance;
 204                 m_pInstance = nullptr;
 205         }
 206 }
 207
 208 void CGitStatusCache::Stop()
 209 {
 210         watcher.Stop();
 211         m_folderCrawler.Stop();
 212         m_shellUpdater.Stop();
 213 }
 214
 215 void CGitStatusCache::Init()
 216 {
 217         m_folderCrawler.Initialise();
 218         m_shellUpdater.Initialise();
 219 }
 220
 221 CGitStatusCache::CGitStatusCache()
 222 {
 223         #define forever DWORD(-1)
 224         AutoLocker lock(m_NoWatchPathCritSec);
 225         KNOWNFOLDERID folderids[] = { FOLDERID_Cookies, FOLDERID_History, FOLDERID_InternetCache, FOLDERID_Windows, FOLDERID_CDBurning, FOLDERID_Fonts, FOLDERID_SearchHistory }; //FOLDERID_RecycleBinFolder
 226         for (KNOWNFOLDERID folderid : folderids)
 227         {
 228                 CString path(GetSpecialFolder(folderid));
 229                 if (!path.IsEmpty())
 230                         m_NoWatchPaths[CTGitPath(path)] = forever;
 231         }
 232 }
 233
 234 CGitStatusCache::~CGitStatusCache()
 235 {
 236         CAutoWriteLock writeLock(m_guard);
 237         ClearCache();
 238 }
 239
 240 void CGitStatusCache::Refresh()
 241 {
 242         m_shellCache.RefreshIfNeeded();
 243         if (!m_pInstance->m_directoryCache.empty())
 244         {
 245                 auto I = m_pInstance->m_directoryCache.cbegin();
 246                 for (/* no init */; I != m_pInstance->m_directoryCache.cend(); ++I)
 247                 {
 248                         if (m_shellCache.IsPathAllowed(I->first.GetWinPath()))
 249                                 I->second->RefreshMostImportant();
 250                         else
 251                         {
 252                                 CGitStatusCache::Instance().RemoveCacheForPath(I->first);
 253                                 I = m_pInstance->m_directoryCache.cbegin();
 254                                 if (I == m_pInstance->m_directoryCache.cend())
 255                                         break;
 256                         }
 257                 }
 258         }
 259 }
 260
 261 bool CGitStatusCache::IsPathGood(const CTGitPath& path)
 262 {
 263         AutoLocker lock(m_NoWatchPathCritSec);
 264         for (auto it = m_NoWatchPaths.cbegin(); it != m_NoWatchPaths.cend(); ++it)
 265         {
 266                 // the ticks check is necessary here, because RemoveTimedoutBlocks is only called within the FolderCrawler loop
 267                 // and we might miss update calls
 268                 // TODO: maybe we also need to check if index.lock and HEAD.lock still exists after a specific timeout (if we miss update notifications for these files too often)
 269                 if (GetTickCount64() < it->second && it->first.IsAncestorOf(path))
 270                 {
 271                         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": path not good: %s\n", it->first.GetWinPath());
 272                         return false;
 273                 }
 274         }
 275         return true;
 276 }
 277
 278 bool CGitStatusCache::BlockPath(const CTGitPath& path, ULONGLONG timeout /* = 0 */)
 279 {
 280         if (timeout == 0)
 281                 timeout = BLOCK_PATH_DEFAULT_TIMEOUT;
 282
 283         if (timeout > BLOCK_PATH_MAX_TIMEOUT)
 284                 timeout = BLOCK_PATH_MAX_TIMEOUT;
 285
 286         timeout = GetTickCount64() + (timeout * 1000);  // timeout is in seconds, but we need the milliseconds
 287
 288         AutoLocker lock(m_NoWatchPathCritSec);
 289         m_NoWatchPaths[path.GetDirectory()] = timeout;
 290
 291         return true;
 292 }
 293
 294 bool CGitStatusCache::UnBlockPath(const CTGitPath& path)
 295 {
 296         bool ret = false;
 297         AutoLocker lock(m_NoWatchPathCritSec);
 298         std::map<CTGitPath, ULONGLONG>::iterator it = m_NoWatchPaths.find(path.GetDirectory());
 299         if (it != m_NoWatchPaths.end())
 300         {
 301                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": path removed from no good: %s\n", it->first.GetWinPath());
 302                 m_NoWatchPaths.erase(it);
 303                 ret = true;
 304         }
 305         AddFolderForCrawling(path.GetDirectory());
 306
 307         return ret;
 308 }
 309
 310 bool CGitStatusCache::RemoveTimedoutBlocks()
 311 {
 312         bool ret = false;
 313         ULONGLONG currentTicks = GetTickCount64();
 314         AutoLocker lock(m_NoWatchPathCritSec);
 315         std::vector<CTGitPath> toRemove;
 316         for (auto it = m_NoWatchPaths.cbegin(); it != m_NoWatchPaths.cend(); ++it)
 317         {
 318                 if (currentTicks > it->second)
 319                         toRemove.push_back(it->first);
 320         }
 321         if (!toRemove.empty())
 322         {
 323                 for (auto it = toRemove.cbegin(); it != toRemove.cend(); ++it)
 324                         ret = ret || UnBlockPath(*it);
 325         }
 326
 327         return ret;
 328 }
 329
 330 void CGitStatusCache::UpdateShell(const CTGitPath& path)
 331 {
 332         if (path.IsEquivalentToWithoutCase(m_mostRecentPath))
 333                 m_mostRecentExpiresAt = 0;
 334         m_shellUpdater.AddPathForUpdate(path);
 335 }
 336
 337 void CGitStatusCache::ClearCache()
 338 {
 339         CAutoWriteLock writeLock(m_guard);
 340         for (CCachedDirectory::CachedDirMap::iterator I = m_directoryCache.begin(); I != m_directoryCache.end(); ++I)
 341         {
 342                 delete I->second;
 343                 I->second = nullptr;
 344         }
 345         m_directoryCache.clear();
 346 }
 347
 348 void CGitStatusCache::RemoveCacheForDirectoryChildren(CCachedDirectory* cdir, const CTGitPath& origPath)
 349 {
 350         m_directoryCache.erase(origPath);
 351
 352         // we could have entries versioned and/or stored in our cache which are
 353         // children of the specified directory, but not in the m_childDirectories
 354         // member
 355         auto itMap = m_directoryCache.lower_bound(origPath);
 356         do
 357         {
 358                 if (itMap != m_directoryCache.end())
 359                 {
 360                         if (origPath.IsAncestorOf(itMap->first))
 361                         {
 362                                 // just in case (see TortoiseSVN issue #255)
 363                                 if (itMap->second == cdir)
 364                                         m_directoryCache.erase(itMap);
 365                                 else
 366                                         RemoveCacheForDirectory(itMap->second, CTGitPath(itMap->first));
 367                         }
 368                 }
 369                 itMap = m_directoryCache.lower_bound(origPath);
 370         } while (itMap != m_directoryCache.end() && origPath.IsAncestorOf(itMap->first));
 371 }
 372
 373 bool CGitStatusCache::RemoveCacheForDirectory(CCachedDirectory* cdir, const CTGitPath& origPath)
 374 {
 375         if (!cdir)
 376                 return false;
 377
 378         CAutoWriteLock writeLock(m_guard);
 379         if (!cdir->m_childDirectories.empty())
 380         {
 381                 for (auto it = cdir->m_childDirectories.begin(); it != cdir->m_childDirectories.end();)
 382                 {
 383                         CCachedDirectory * childdir = CGitStatusCache::Instance().GetDirectoryCacheEntryNoCreate(it->first);
 384                         if ((childdir) && (!cdir->m_directoryPath.IsEquivalentTo(childdir->m_directoryPath)) && (cdir->m_directoryPath.GetFileOrDirectoryName() != L".."))
 385                                 RemoveCacheForDirectory(childdir, it->first);
 386                         cdir->m_childDirectories.erase(it->first);
 387                         it = cdir->m_childDirectories.begin();
 388                 }
 389         }
 390         cdir->m_childDirectories.clear();
 391
 392         RemoveCacheForDirectoryChildren(cdir, origPath);
 393         RemoveCacheForDirectoryChildren(cdir, cdir->m_directoryPath);
 394
 395         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": removed from cache %s\n", cdir->m_directoryPath.GetWinPath());
 396         delete cdir;
 397         return true;
 398 }
 399
 400 void CGitStatusCache::RemoveCacheForPath(const CTGitPath& path)
 401 {
 402         // Stop the crawler starting on a new folder
 403         CCrawlInhibitor crawlInhibit(&m_folderCrawler);
 404         CCachedDirectory* dirtoremove = nullptr;
 405
 406         auto itMap = m_directoryCache.find(path);
 407         if ((itMap != m_directoryCache.end())&&(itMap->second))
 408                 dirtoremove = itMap->second;
 409         if (!dirtoremove)
 410                 return;
 411         ATLASSERT(path.IsEquivalentToWithoutCase(dirtoremove->m_directoryPath));
 412         RemoveCacheForDirectory(dirtoremove, path);
 413 }
 414
 415 CCachedDirectory * CGitStatusCache::GetDirectoryCacheEntry(const CTGitPath& path)
 416 {
 417         ATLASSERT(path.IsDirectory() || !PathFileExists(path.GetWinPath()));
 418
 419         CAutoReadLock readLock(m_guardcacheddirectories);
 420         auto itMap = m_directoryCache.find(path);
 421         if ((itMap != m_directoryCache.end())&&(itMap->second))
 422         {
 423                 // We've found this directory in the cache
 424                 return itMap->second;
 425         }
 426         else
 427         {
 428                 // if the CCachedDirectory is nullptr but the path is in our cache,
 429                 // that means that path got invalidated and needs to be treated
 430                 // as if it never was in our cache. So we remove the last remains
 431                 // from the cache and start from scratch.
 432
 433                 CAutoWriteLock writeLock(m_guardcacheddirectories);
 434                 // Since above there's a small chance that before we can upgrade to
 435                 // writer state some other thread gained writer state and changed
 436                 // the data, we have to recreate the iterator here again.
 437                 itMap = m_directoryCache.find(path);
 438                 if (itMap!=m_directoryCache.end())
 439                 {
 440                         CAutoWriteLock writeLock2(m_guard); // needed? Can this happen?
 441                         delete itMap->second;
 442                         m_directoryCache.erase(itMap);
 443                 }
 444                 // We don't know anything about this directory yet - lets add it to our cache
 445                 // but only if it exists!
 446                 if (path.Exists() && m_shellCache.IsPathAllowed(path.GetWinPath()) && !GitAdminDir::IsAdminDirPath(path.GetWinPath()))
 447                 {
 448                         // some notifications are for files which got removed/moved around.
 449                         // In such cases, the CTGitPath::IsDirectory() will return true (it assumes a directory if
 450                         // the path doesn't exist). Which means we can get here with a path to a file
 451                         // instead of a directory.
 452                         // Since we're here most likely called from the crawler thread, the file could exist
 453                         // again. If that's the case, just do nothing
 454                         if (path.IsDirectory()||(!path.Exists()))
 455                         {
 456                                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": adding %s to our cache\n", path.GetWinPath());
 457                                 CCachedDirectory * newcdir = new CCachedDirectory(path);
 458                                 if (newcdir)
 459                                 {
 460                                         CCachedDirectory * cdir = m_directoryCache.insert(m_directoryCache.lower_bound(path), std::make_pair(path, newcdir))->second;
 461                                         // TSVN crawls here
 462                                         return cdir;
 463                                 }
 464                                 m_bClearMemory = true;
 465                         }
 466                 }
 467                 return nullptr;
 468         }
 469 }
 470
 471 CCachedDirectory * CGitStatusCache::GetDirectoryCacheEntryNoCreate(const CTGitPath& path)
 472 {
 473         ATLASSERT(path.IsDirectory() || !PathFileExists(path.GetWinPath()));
 474
 475         CAutoReadLock readLock(m_guardcacheddirectories);
 476         auto itMap = m_directoryCache.find(path);
 477         if(itMap != m_directoryCache.end())
 478         {
 479                 // We've found this directory in the cache
 480                 return itMap->second;
 481         }
 482         return nullptr;
 483 }
 484
 485 CStatusCacheEntry CGitStatusCache::GetStatusForPath(const CTGitPath& path, DWORD flags)
 486 {
 487         const bool bRecursive = !!(flags & TGITCACHE_FLAGS_RECUSIVE_STATUS);
 488
 489         // Check a very short-lived 'mini-cache' of the last thing we were asked for.
 490         LONGLONG now = static_cast<LONGLONG>(GetTickCount64());
 491         if(now-m_mostRecentExpiresAt < 0)
 492         {
 493                 if (path.IsEquivalentTo(m_mostRecentPath))
 494                         return m_mostRecentStatus;
 495         }
 496         {
 497                 AutoLocker lock(m_critSec);
 498                 m_mostRecentPath = path;
 499                 m_mostRecentExpiresAt = now + 1000;
 500         }
 501
 502         if (IsPathGood(path))
 503         {
 504                 // Stop the crawler starting on a new folder while we're doing this much more important task...
 505                 // Please note, that this may be a second "lock" used concurrently to the one in RemoveCacheForPath().
 506                 CCrawlInhibitor crawlInhibit(&m_folderCrawler);
 507
 508                 CTGitPath dirpath = path.GetContainingDirectory();
 509                 if ((dirpath.IsEmpty()) || (!m_shellCache.IsPathAllowed(dirpath.GetWinPath())))
 510                         dirpath = path.GetDirectory();
 511                 CCachedDirectory * cachedDir = GetDirectoryCacheEntry(dirpath);
 512                 if (cachedDir)
 513                 {
 514                         //CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": GetStatusForMember %d\n", bFetch);
 515                         CStatusCacheEntry entry = cachedDir->GetStatusForMember(path, bRecursive, false);
 516                         {
 517                                 AutoLocker lock(m_critSec);
 518                                 m_mostRecentStatus = entry;
 519                                 return m_mostRecentStatus;
 520                         }
 521                 }
 522         }
 523         else
 524         {
 525                 // path is blocked for some reason: return the cached status if we have one
 526                 // we do here only a cache search, absolutely no disk access is allowed!
 527                 auto cachedDir = GetDirectoryCacheEntryNoCreate(path.GetDirectory());
 528                 if (cachedDir)
 529                 {
 530                         if (path.IsDirectory())
 531                         {
 532                                 CStatusCacheEntry entry = cachedDir->GetOwnStatus(false);
 533                                 AutoLocker lock(m_critSec);
 534                                 m_mostRecentStatus = entry;
 535                                 return m_mostRecentStatus;
 536                         }
 537                         else
 538                         {
 539                                 // We've found this directory in the cache
 540                                 CStatusCacheEntry entry = cachedDir->GetCacheStatusForMember(path);
 541                                 {
 542                                         AutoLocker lock(m_critSec);
 543                                         m_mostRecentStatus = entry;
 544                                         return m_mostRecentStatus;
 545                                 }
 546                         }
 547                 }
 548         }
 549         AutoLocker lock(m_critSec);
 550         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": ignored no good path %s\n", path.GetWinPath());
 551         m_mostRecentStatus = CStatusCacheEntry();
 552         if (m_shellCache.ShowExcludedAsNormal() && path.IsDirectory() && m_shellCache.HasGITAdminDir(path.GetWinPath(), true))
 553         {
 554                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": force status %s\n", path.GetWinPath());
 555                 m_mostRecentStatus.ForceStatus(git_wc_status_normal);
 556         }
 557         return m_mostRecentStatus;
 558 }
 559
 560 void CGitStatusCache::AddFolderForCrawling(const CTGitPath& path)
 561 {
 562         m_folderCrawler.AddDirectoryForUpdate(path);
 563 }
 564
 565 void CGitStatusCache::CloseWatcherHandles(HANDLE hFile)
 566 {
 567         CTGitPath path = watcher.CloseInfoMap(hFile);
 568         if (!path.IsEmpty())
 569                 m_folderCrawler.BlockPath(path);
 570         CGitStatusCache::Instance().m_GitStatus.ReleasePathsRecursively(path.GetWinPathString());
 571 }
 572
 573 void CGitStatusCache::CloseWatcherHandles(const CTGitPath& path)
 574 {
 575         watcher.CloseHandlesForPath(path);
 576         m_folderCrawler.ReleasePathForUpdate(path);
 577         CGitStatusCache::Instance().m_GitStatus.ReleasePathsRecursively(path.GetWinPathString());
 578 }
 579
 580 CString CGitStatusCache::GetSpecialFolder(REFKNOWNFOLDERID rfid)
 581 {
 582         CComHeapPtr<WCHAR> pszPath;
 583         if (SHGetKnownFolderPath(rfid, KF_FLAG_CREATE, nullptr, &pszPath) != S_OK)
 584                 return CString();
 585
 586         return CString(pszPath);
 587 }