src/Utils/Hooks.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2007-2008 - TortoiseSVN
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 #include "stdafx.h"
  20 #include "Hooks.h"
  21 #include "registry.h"
  22 #include "StringUtils.h"
  23 #include "TempFile.h"
  24 #include "SmartHandle.h"
  25
  26 CHooks* CHooks::m_pInstance;
  27
  28 CHooks::CHooks()
  29 {
  30 }
  31
  32 CHooks::~CHooks()
  33 {
  34 };
  35
  36 bool CHooks::Create()
  37 {
  38         if (m_pInstance == NULL)
  39                 m_pInstance = new CHooks();
  40         CRegString reghooks = CRegString(_T("Software\\TortoiseGit\\hooks"));
  41         CString strhooks = reghooks;
  42         // now fill the map with all the hooks defined in the string
  43         // the string consists of multiple lines, where one hook script is defined
  44         // as four lines:
  45         // line 1: the hook type
  46         // line 2: path to working copy where to apply the hook script
  47         // line 3: command line to execute
  48         // line 4: 'true' or 'false' for waiting for the script to finish
  49         // line 5: 'show' or 'hide' on how to start the hook script
  50         hookkey key;
  51         int pos = 0;
  52         hookcmd cmd;
  53         while ((pos = strhooks.Find('\n')) >= 0)
  54         {
  55                 // line 1
  56                 key.htype = GetHookType(strhooks.Mid(0, pos));
  57                 if (pos+1 < strhooks.GetLength())
  58                         strhooks = strhooks.Mid(pos+1);
  59                 else
  60                         strhooks.Empty();
  61                 bool bComplete = false;
  62                 if ((pos = strhooks.Find('\n')) >= 0)
  63                 {
  64                         // line 2
  65                         key.path = CTGitPath(strhooks.Mid(0, pos));
  66                         if (pos+1 < strhooks.GetLength())
  67                                 strhooks = strhooks.Mid(pos+1);
  68                         else
  69                                 strhooks.Empty();
  70                         if ((pos = strhooks.Find('\n')) >= 0)
  71                         {
  72                                 // line 3
  73                                 cmd.commandline = strhooks.Mid(0, pos);
  74                                 if (pos+1 < strhooks.GetLength())
  75                                         strhooks = strhooks.Mid(pos+1);
  76                                 else
  77                                         strhooks.Empty();
  78                                 if ((pos = strhooks.Find('\n')) >= 0)
  79                                 {
  80                                         // line 4
  81                                         cmd.bWait = (strhooks.Mid(0, pos).CompareNoCase(_T("true"))==0);
  82                                         if (pos+1 < strhooks.GetLength())
  83                                                 strhooks = strhooks.Mid(pos+1);
  84                                         else
  85                                                 strhooks.Empty();
  86                                         if ((pos = strhooks.Find('\n')) >= 0)
  87                                         {
  88                                                 // line 5
  89                                                 cmd.bShow = (strhooks.Mid(0, pos).CompareNoCase(_T("show"))==0);
  90                                                 if (pos+1 < strhooks.GetLength())
  91                                                         strhooks = strhooks.Mid(pos+1);
  92                                                 else
  93                                                         strhooks.Empty();
  94                                                 bComplete = true;
  95                                         }
  96                                 }
  97                         }
  98                 }
  99                 if (bComplete)
 100                 {
 101                         m_pInstance->insert(std::pair<hookkey, hookcmd>(key, cmd));
 102                 }
 103         }
 104         return true;
 105 }
 106
 107 CHooks& CHooks::Instance()
 108 {
 109         return *m_pInstance;
 110 }
 111
 112 void CHooks::Destroy()
 113 {
 114         delete m_pInstance;
 115 }
 116
 117 bool CHooks::Save()
 118 {
 119         CString strhooks;
 120         for (hookiterator it = begin(); it != end(); ++it)
 121         {
 122                 strhooks += GetHookTypeString(it->first.htype);
 123                 strhooks += '\n';
 124                 strhooks += it->first.path.GetWinPathString();
 125                 strhooks += '\n';
 126                 strhooks += it->second.commandline;
 127                 strhooks += '\n';
 128                 strhooks += (it->second.bWait ? _T("true") : _T("false"));
 129                 strhooks += '\n';
 130                 strhooks += (it->second.bShow ? _T("show") : _T("hide"));
 131                 strhooks += '\n';
 132         }
 133         CRegString reghooks = CRegString(_T("Software\\TortoiseGit\\hooks"));
 134         reghooks = strhooks;
 135         if (reghooks.GetLastError())
 136                 return false;
 137         return true;
 138 }
 139
 140 bool CHooks::Remove(hookkey key)
 141 {
 142         return (erase(key) > 0);
 143 }
 144
 145 void CHooks::Add(hooktype ht, const CTGitPath& Path, LPCTSTR szCmd, bool bWait, bool bShow)
 146 {
 147         hookkey key;
 148         key.htype = ht;
 149         key.path = Path;
 150         hookiterator it = find(key);
 151         if (it!=end())
 152                 erase(it);
 153
 154         hookcmd cmd;
 155         cmd.commandline = szCmd;
 156         cmd.bWait = bWait;
 157         cmd.bShow = bShow;
 158         insert(std::pair<hookkey, hookcmd>(key, cmd));
 159 }
 160
 161 CString CHooks::GetHookTypeString(hooktype t)
 162 {
 163         switch (t)
 164         {
 165         case start_commit_hook:
 166                 return _T("start_commit_hook");
 167         case pre_commit_hook:
 168                 return _T("pre_commit_hook");
 169         case post_commit_hook:
 170                 return _T("post_commit_hook");
 171         case start_update_hook:
 172                 return _T("start_update_hook");
 173         case pre_update_hook:
 174                 return _T("pre_update_hook");
 175         case post_update_hook:
 176                 return _T("post_update_hook");
 177         case pre_push_hook:
 178                 return _T("pre_push_hook");
 179         case post_push_hook:
 180                 return _T("post_push_hook");
 181         }
 182         return _T("");
 183 }
 184
 185 hooktype CHooks::GetHookType(const CString& s)
 186 {
 187         if (s.Compare(_T("start_commit_hook"))==0)
 188                 return start_commit_hook;
 189         if (s.Compare(_T("pre_commit_hook"))==0)
 190                 return pre_commit_hook;
 191         if (s.Compare(_T("post_commit_hook"))==0)
 192                 return post_commit_hook;
 193         if (s.Compare(_T("start_update_hook"))==0)
 194                 return start_update_hook;
 195         if (s.Compare(_T("pre_update_hook"))==0)
 196                 return pre_update_hook;
 197         if (s.Compare(_T("post_update_hook"))==0)
 198                 return post_update_hook;
 199         if (s.Compare(_T("pre_push_hook"))==0)
 200                 return pre_push_hook;
 201         if (s.Compare(_T("post_push_hook"))==0)
 202                 return post_push_hook;
 203
 204         return unknown_hook;
 205 }
 206
 207 void CHooks::AddParam(CString& sCmd, const CString& param)
 208 {
 209         sCmd += _T(" \"");
 210         sCmd += param;
 211         sCmd += _T("\"");
 212 }
 213
 214 void CHooks::AddPathParam(CString& sCmd, const CTGitPathList& pathList)
 215 {
 216         CTGitPath temppath = CTempFiles::Instance().GetTempFilePath(true);
 217         pathList.WriteToFile(temppath.GetWinPathString(), true);
 218         AddParam(sCmd, temppath.GetWinPathString());
 219 }
 220
 221 void CHooks::AddCWDParam(CString& sCmd, const CTGitPathList& pathList)
 222 {
 223         AddParam(sCmd, pathList.GetCommonRoot().GetDirectory().GetWinPathString());
 224 }
 225
 226 void CHooks::AddDepthParam(CString& sCmd, git_depth_t depth)
 227 {
 228         CString sTemp;
 229         sTemp.Format(_T("%d"), depth);
 230         AddParam(sCmd, sTemp);
 231 }
 232
 233 void CHooks::AddErrorParam(CString& sCmd, const CString& error)
 234 {
 235         CTGitPath tempPath;
 236         tempPath = CTempFiles::Instance().GetTempFilePath(true);
 237         CStringUtils::WriteStringToTextFile(tempPath.GetWinPath(), (LPCTSTR)error);
 238         AddParam(sCmd, tempPath.GetWinPathString());
 239 }
 240
 241 CTGitPath CHooks::AddMessageFileParam(CString& sCmd, const CString& message)
 242 {
 243         CTGitPath tempPath;
 244         tempPath = CTempFiles::Instance().GetTempFilePath(true);
 245         CStringUtils::WriteStringToTextFile(tempPath.GetWinPath(), (LPCTSTR)message);
 246         AddParam(sCmd, tempPath.GetWinPathString());
 247         return tempPath;
 248 }
 249
 250 bool CHooks::StartCommit(const CTGitPathList& pathList, CString& message, DWORD& exitcode, CString& error)
 251 {
 252         hookiterator it = FindItem(start_commit_hook, pathList);
 253         if (it == end())
 254                 return false;
 255         CString sCmd = it->second.commandline;
 256         AddPathParam(sCmd, pathList);
 257         CTGitPath temppath = AddMessageFileParam(sCmd, message);
 258         AddCWDParam(sCmd, pathList);
 259         exitcode = RunScript(sCmd, pathList.GetCommonRoot().GetDirectory().GetWinPath(), error, it->second.bWait, it->second.bShow);
 260         if (!exitcode && !temppath.IsEmpty())
 261         {
 262                 CStringUtils::ReadStringFromTextFile(temppath.GetWinPathString(), message);
 263         }
 264         return true;
 265 }
 266
 267 bool CHooks::PreCommit(const CTGitPathList& pathList, git_depth_t depth, const CString& message, DWORD& exitcode, CString& error)
 268 {
 269         hookiterator it = FindItem(pre_commit_hook, pathList);
 270         if (it == end())
 271                 return false;
 272         CString sCmd = it->second.commandline;
 273         AddPathParam(sCmd, pathList);
 274         AddDepthParam(sCmd, depth);
 275         AddMessageFileParam(sCmd, message);
 276         AddCWDParam(sCmd, pathList);
 277         exitcode = RunScript(sCmd, pathList.GetCommonRoot().GetDirectory().GetWinPath(), error, it->second.bWait, it->second.bShow);
 278         return true;
 279 }
 280
 281 bool CHooks::PostCommit(const CTGitPathList& pathList, git_depth_t depth, GitRev rev, const CString& message, DWORD& exitcode, CString& error)
 282 {
 283         hookiterator it = FindItem(post_commit_hook, pathList);
 284         if (it == end())
 285                 return false;
 286         CString sCmd = it->second.commandline;
 287         AddPathParam(sCmd, pathList);
 288         AddDepthParam(sCmd, depth);
 289         AddMessageFileParam(sCmd, message);
 290         AddParam(sCmd, rev.m_CommitHash.ToString());
 291         AddErrorParam(sCmd, error);
 292         AddCWDParam(sCmd, pathList);
 293         exitcode = RunScript(sCmd, pathList.GetCommonRoot().GetDirectory().GetWinPath(), error, it->second.bWait, it->second.bShow);
 294         return true;
 295 }
 296
 297 bool CHooks::StartUpdate(const CTGitPathList& pathList, DWORD& exitcode, CString& error)
 298 {
 299         hookiterator it = FindItem(start_update_hook, pathList);
 300         if (it == end())
 301                 return false;
 302         CString sCmd = it->second.commandline;
 303         AddPathParam(sCmd, pathList);
 304         AddCWDParam(sCmd, pathList);
 305         exitcode = RunScript(sCmd, pathList.GetCommonRoot().GetDirectory().GetWinPath(), error, it->second.bWait, it->second.bShow);
 306         return true;
 307 }
 308
 309 bool CHooks::PreUpdate(const CTGitPathList& pathList, git_depth_t depth, GitRev rev, DWORD& exitcode, CString& error)
 310 {
 311         hookiterator it = FindItem(pre_update_hook, pathList);
 312         if (it == end())
 313                 return false;
 314         CString sCmd = it->second.commandline;
 315         AddPathParam(sCmd, pathList);
 316         AddDepthParam(sCmd, depth);
 317         AddParam(sCmd, rev.m_CommitHash.ToString());
 318         AddCWDParam(sCmd, pathList);
 319         exitcode = RunScript(sCmd, pathList.GetCommonRoot().GetDirectory().GetWinPath(), error, it->second.bWait, it->second.bShow);
 320         return true;
 321 }
 322
 323 bool CHooks::PostUpdate(const CTGitPathList& pathList, git_depth_t depth, GitRev rev, DWORD& exitcode, CString& error)
 324 {
 325         hookiterator it = FindItem(post_update_hook, pathList);
 326         if (it == end())
 327                 return false;
 328         CString sCmd = it->second.commandline;
 329         AddPathParam(sCmd, pathList);
 330         AddDepthParam(sCmd, depth);
 331         AddParam(sCmd, rev.m_CommitHash.ToString());
 332         AddErrorParam(sCmd, error);
 333         AddCWDParam(sCmd, pathList);
 334         exitcode = RunScript(sCmd, pathList.GetCommonRoot().GetDirectory().GetWinPath(), error, it->second.bWait, it->second.bShow);
 335         return true;
 336 }
 337
 338 bool CHooks::PrePush(const CTGitPathList& pathList,DWORD& exitcode, CString& error)
 339 {
 340         hookiterator it = FindItem(pre_push_hook, pathList);
 341         if (it == end())
 342                 return false;
 343         CString sCmd = it->second.commandline;
 344         AddPathParam(sCmd, pathList);
 345         AddErrorParam(sCmd, error);
 346         AddCWDParam(sCmd, pathList);
 347         exitcode = RunScript(sCmd, pathList.GetCommonRoot().GetDirectory().GetWinPath(), error, it->second.bWait, it->second.bShow);
 348         return true;
 349 }
 350
 351 bool CHooks::PostPush(const CTGitPathList& pathList,DWORD& exitcode, CString& error)
 352 {
 353         hookiterator it = FindItem(post_push_hook, pathList);
 354         if (it == end())
 355                 return false;
 356         CString sCmd = it->second.commandline;
 357         AddPathParam(sCmd, pathList);
 358         AddErrorParam(sCmd, error);
 359         AddCWDParam(sCmd, pathList);
 360         exitcode = RunScript(sCmd, pathList.GetCommonRoot().GetDirectory().GetWinPath(), error, it->second.bWait, it->second.bShow);
 361         return true;
 362
 363 }
 364 hookiterator CHooks::FindItem(hooktype t, const CTGitPathList& pathList)
 365 {
 366         hookkey key;
 367         for (int i=0; i<pathList.GetCount(); ++i)
 368         {
 369                 CTGitPath path = pathList[i];
 370                 do
 371                 {
 372                         key.htype = t;
 373                         key.path = path;
 374                         hookiterator it = find(key);
 375                         if (it != end())
 376                         {
 377                                 return it;
 378                         }
 379                         path = path.GetContainingDirectory();
 380                 } while(!path.IsEmpty());
 381         }
 382         // look for a script with a path as '*'
 383         key.htype = t;
 384         key.path = CTGitPath(_T("*"));
 385         hookiterator it = find(key);
 386         if (it != end())
 387         {
 388                 return it;
 389         }
 390
 391         return end();
 392 }
 393
 394 DWORD CHooks::RunScript(CString cmd, LPCTSTR currentDir, CString& error, bool bWait, bool bShow)
 395 {
 396         DWORD exitcode = 0;
 397         SECURITY_ATTRIBUTES sa;
 398         SecureZeroMemory(&sa, sizeof(sa));
 399         sa.nLength = sizeof(sa);
 400         sa.bInheritHandle = TRUE;
 401
 402         CAutoFile hOut ;
 403         CAutoFile hRedir;
 404         CAutoFile hErr;
 405
 406         // clear the error string
 407         error.Empty();
 408
 409         // Create Temp File for redirection
 410         TCHAR szTempPath[MAX_PATH];
 411         TCHAR szOutput[MAX_PATH];
 412         TCHAR szErr[MAX_PATH];
 413         GetTempPath(_countof(szTempPath), szTempPath);
 414         GetTempFileName(szTempPath, _T("git"), 0, szErr);
 415
 416         // setup redirection handles
 417         // output handle must be WRITE mode, share READ
 418         // redirect handle must be READ mode, share WRITE
 419         hErr   = CreateFile(szErr, GENERIC_WRITE, FILE_SHARE_READ, &sa, CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY,        0);
 420
 421         if (!hErr)
 422                 return (DWORD)-1;
 423
 424         hRedir = CreateFile(szErr, GENERIC_READ, FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0);
 425
 426         if (!hRedir)
 427                 return (DWORD)-1;
 428
 429         GetTempFileName(szTempPath, _T("git"), 0, szOutput);
 430         hOut   = CreateFile(szOutput, GENERIC_WRITE, FILE_SHARE_READ, &sa, CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY,     0);
 431
 432         if (!hOut)
 433                 return (DWORD)-1;
 434
 435         // setup startup info, set std out/err handles
 436         // hide window
 437         STARTUPINFO si;
 438         SecureZeroMemory(&si, sizeof(si));
 439         si.cb = sizeof(si);
 440         if (hOut  != INVALID_HANDLE_VALUE)
 441         {
 442                 si.dwFlags     = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
 443                 si.hStdOutput  = hOut;
 444                 si.hStdError   = hErr;
 445                 si.wShowWindow = bShow ? SW_SHOW : SW_HIDE;
 446         }
 447
 448         PROCESS_INFORMATION pi;
 449         SecureZeroMemory(&pi, sizeof(pi));
 450
 451         DWORD dwFlags = 0;
 452
 453         if (!CreateProcess(NULL, cmd.GetBuffer(), NULL, NULL, TRUE, dwFlags, NULL, currentDir, &si, &pi))
 454         {
 455                         int err = GetLastError();  // preserve the CreateProcess error
 456                         error = CFormatMessageWrapper(err);
 457                         SetLastError(err);
 458                         cmd.ReleaseBuffer();
 459                         return (DWORD)-1;
 460         }
 461         cmd.ReleaseBuffer();
 462
 463         CloseHandle(pi.hThread);
 464
 465         // wait for process to finish, capture redirection and
 466         // send it to the parent window/console
 467         if (bWait)
 468         {
 469                 DWORD dw;
 470                 char buf[256];
 471                 do
 472                 {
 473                         SecureZeroMemory(&buf,sizeof(buf));
 474                         while (ReadFile(hRedir, &buf, sizeof(buf)-1, &dw, NULL))
 475                         {
 476                                 if (dw == 0)
 477                                         break;
 478                                 error += CString(CStringA(buf,dw));
 479                                 SecureZeroMemory(&buf,sizeof(buf));
 480                         }
 481                 } while (WaitForSingleObject(pi.hProcess, 0) != WAIT_OBJECT_0);
 482
 483                 // perform any final flushing
 484                 while (ReadFile(hRedir, &buf, sizeof(buf)-1, &dw, NULL))
 485                 {
 486                         if (dw == 0)
 487                                 break;
 488
 489                         error += CString(CStringA(buf, dw));
 490                         SecureZeroMemory(&buf,sizeof(buf));
 491                 }
 492                 WaitForSingleObject(pi.hProcess, INFINITE);
 493                 GetExitCodeProcess(pi.hProcess, &exitcode);
 494         }
 495         CloseHandle(pi.hProcess);
 496         DeleteFile(szOutput);
 497         DeleteFile(szErr);
 498
 499         return exitcode;
 500 }
 501