src/Utils/Hooks.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2011-2014 - TortoiseGit
   4 // Copyright (C) 2007-2008 - TortoiseSVN
   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 #include "stdafx.h"
  21 #include "Hooks.h"
  22 #include "registry.h"
  23 #include "StringUtils.h"
  24 #include "TempFile.h"
  25 #include "SmartHandle.h"
  26
  27 CHooks* CHooks::m_pInstance;
  28
  29 CHooks::CHooks()
  30 {
  31 }
  32
  33 CHooks::~CHooks()
  34 {
  35 };
  36
  37 bool CHooks::Create()
  38 {
  39         if (m_pInstance == NULL)
  40                 m_pInstance = new CHooks();
  41         CRegString reghooks = CRegString(_T("Software\\TortoiseGit\\hooks"));
  42         CString strhooks = reghooks;
  43         // now fill the map with all the hooks defined in the string
  44         // the string consists of multiple lines, where one hook script is defined
  45         // as four lines:
  46         // line 1: the hook type
  47         // line 2: path to working copy where to apply the hook script
  48         // line 3: command line to execute
  49         // line 4: 'true' or 'false' for waiting for the script to finish
  50         // line 5: 'show' or 'hide' on how to start the hook script
  51         hookkey key;
  52         int pos = 0;
  53         hookcmd cmd;
  54         while ((pos = strhooks.Find('\n')) >= 0)
  55         {
  56                 // line 1
  57                 key.htype = GetHookType(strhooks.Mid(0, pos));
  58                 if (pos+1 < strhooks.GetLength())
  59                         strhooks = strhooks.Mid(pos+1);
  60                 else
  61                         strhooks.Empty();
  62                 bool bComplete = false;
  63                 if ((pos = strhooks.Find('\n')) >= 0)
  64                 {
  65                         // line 2
  66                         key.path = CTGitPath(strhooks.Mid(0, pos));
  67                         if (pos+1 < strhooks.GetLength())
  68                                 strhooks = strhooks.Mid(pos+1);
  69                         else
  70                                 strhooks.Empty();
  71                         if ((pos = strhooks.Find('\n')) >= 0)
  72                         {
  73                                 // line 3
  74                                 cmd.commandline = strhooks.Mid(0, pos);
  75                                 if (pos+1 < strhooks.GetLength())
  76                                         strhooks = strhooks.Mid(pos+1);
  77                                 else
  78                                         strhooks.Empty();
  79                                 if ((pos = strhooks.Find('\n')) >= 0)
  80                                 {
  81                                         // line 4
  82                                         cmd.bWait = (strhooks.Mid(0, pos).CompareNoCase(_T("true"))==0);
  83                                         if (pos+1 < strhooks.GetLength())
  84                                                 strhooks = strhooks.Mid(pos+1);
  85                                         else
  86                                                 strhooks.Empty();
  87                                         if ((pos = strhooks.Find('\n')) >= 0)
  88                                         {
  89                                                 // line 5
  90                                                 cmd.bShow = (strhooks.Mid(0, pos).CompareNoCase(_T("show"))==0);
  91                                                 if (pos+1 < strhooks.GetLength())
  92                                                         strhooks = strhooks.Mid(pos+1);
  93                                                 else
  94                                                         strhooks.Empty();
  95                                                 bComplete = true;
  96                                         }
  97                                 }
  98                         }
  99                 }
 100                 if (bComplete)
 101                 {
 102                         m_pInstance->insert(std::pair<hookkey, hookcmd>(key, cmd));
 103                 }
 104         }
 105         return true;
 106 }
 107
 108 CHooks& CHooks::Instance()
 109 {
 110         return *m_pInstance;
 111 }
 112
 113 void CHooks::Destroy()
 114 {
 115         delete m_pInstance;
 116 }
 117
 118 bool CHooks::Save()
 119 {
 120         CString strhooks;
 121         for (hookiterator it = begin(); it != end(); ++it)
 122         {
 123                 strhooks += GetHookTypeString(it->first.htype);
 124                 strhooks += '\n';
 125                 strhooks += it->first.path.GetWinPathString();
 126                 strhooks += '\n';
 127                 strhooks += it->second.commandline;
 128                 strhooks += '\n';
 129                 strhooks += (it->second.bWait ? _T("true") : _T("false"));
 130                 strhooks += '\n';
 131                 strhooks += (it->second.bShow ? _T("show") : _T("hide"));
 132                 strhooks += '\n';
 133         }
 134         CRegString reghooks = CRegString(_T("Software\\TortoiseGit\\hooks"));
 135         reghooks = strhooks;
 136         if (reghooks.GetLastError())
 137                 return false;
 138         return true;
 139 }
 140
 141 bool CHooks::Remove(const hookkey &key)
 142 {
 143         return (erase(key) > 0);
 144 }
 145
 146 void CHooks::Add(hooktype ht, const CTGitPath& Path, LPCTSTR szCmd, bool bWait, bool bShow)
 147 {
 148         hookkey key;
 149         key.htype = ht;
 150         key.path = Path;
 151         hookiterator it = find(key);
 152         if (it!=end())
 153                 erase(it);
 154
 155         hookcmd cmd;
 156         cmd.commandline = szCmd;
 157         cmd.bWait = bWait;
 158         cmd.bShow = bShow;
 159         insert(std::pair<hookkey, hookcmd>(key, cmd));
 160 }
 161
 162 CString CHooks::GetHookTypeString(hooktype t)
 163 {
 164         switch (t)
 165         {
 166         case start_commit_hook:
 167                 return _T("start_commit_hook");
 168         case pre_commit_hook:
 169                 return _T("pre_commit_hook");
 170         case post_commit_hook:
 171                 return _T("post_commit_hook");
 172         case pre_push_hook:
 173                 return _T("pre_push_hook");
 174         case post_push_hook:
 175                 return _T("post_push_hook");
 176         }
 177         return _T("");
 178 }
 179
 180 hooktype CHooks::GetHookType(const CString& s)
 181 {
 182         if (s.Compare(_T("start_commit_hook"))==0)
 183                 return start_commit_hook;
 184         if (s.Compare(_T("pre_commit_hook"))==0)
 185                 return pre_commit_hook;
 186         if (s.Compare(_T("post_commit_hook"))==0)
 187                 return post_commit_hook;
 188         if (s.Compare(_T("pre_push_hook"))==0)
 189                 return pre_push_hook;
 190         if (s.Compare(_T("post_push_hook"))==0)
 191                 return post_push_hook;
 192
 193         return unknown_hook;
 194 }
 195
 196 void CHooks::AddParam(CString& sCmd, const CString& param)
 197 {
 198         sCmd += _T(" \"");
 199         sCmd += param;
 200         sCmd += _T("\"");
 201 }
 202
 203 void CHooks::AddPathParam(CString& sCmd, const CTGitPathList& pathList)
 204 {
 205         CTGitPath temppath = CTempFiles::Instance().GetTempFilePath(true);
 206         pathList.WriteToFile(temppath.GetWinPathString(), true);
 207         AddParam(sCmd, temppath.GetWinPathString());
 208 }
 209
 210 void CHooks::AddCWDParam(CString& sCmd, const CString& workingTree)
 211 {
 212         AddParam(sCmd, workingTree);
 213 }
 214
 215 void CHooks::AddErrorParam(CString& sCmd, const CString& error)
 216 {
 217         CTGitPath tempPath;
 218         tempPath = CTempFiles::Instance().GetTempFilePath(true);
 219         CStringUtils::WriteStringToTextFile(tempPath.GetWinPath(), (LPCTSTR)error);
 220         AddParam(sCmd, tempPath.GetWinPathString());
 221 }
 222
 223 CTGitPath CHooks::AddMessageFileParam(CString& sCmd, const CString& message)
 224 {
 225         CTGitPath tempPath;
 226         tempPath = CTempFiles::Instance().GetTempFilePath(true);
 227         CStringUtils::WriteStringToTextFile(tempPath.GetWinPath(), (LPCTSTR)message);
 228         AddParam(sCmd, tempPath.GetWinPathString());
 229         return tempPath;
 230 }
 231
 232 bool CHooks::StartCommit(const CString& workingTree, const CTGitPathList& pathList, CString& message, DWORD& exitcode, CString& error)
 233 {
 234         auto it = FindItem(start_commit_hook, workingTree);
 235         if (it == end())
 236                 return false;
 237         CString sCmd = it->second.commandline;
 238         AddPathParam(sCmd, pathList);
 239         CTGitPath temppath = AddMessageFileParam(sCmd, message);
 240         AddCWDParam(sCmd, workingTree);
 241         exitcode = RunScript(sCmd, workingTree, error, it->second.bWait, it->second.bShow);
 242         if (!exitcode && !temppath.IsEmpty())
 243         {
 244                 CStringUtils::ReadStringFromTextFile(temppath.GetWinPathString(), message);
 245         }
 246         return true;
 247 }
 248
 249 bool CHooks::PreCommit(const CString& workingTree, const CTGitPathList& pathList, CString& message, DWORD& exitcode, CString& error)
 250 {
 251         auto it = FindItem(pre_commit_hook, workingTree);
 252         if (it == end())
 253                 return false;
 254         CString sCmd = it->second.commandline;
 255         AddPathParam(sCmd, pathList);
 256         CTGitPath temppath = AddMessageFileParam(sCmd, message);
 257         AddCWDParam(sCmd, workingTree);
 258         exitcode = RunScript(sCmd, workingTree, error, it->second.bWait, it->second.bShow);
 259         if (!exitcode && !temppath.IsEmpty())
 260                 CStringUtils::ReadStringFromTextFile(temppath.GetWinPathString(), message);
 261         return true;
 262 }
 263
 264 bool CHooks::PostCommit(const CString& workingTree, const CTGitPathList& pathList, const GitRev& rev, const CString& message, DWORD& exitcode, CString& error)
 265 {
 266         auto it = FindItem(post_commit_hook, workingTree);
 267         if (it == end())
 268                 return false;
 269         CString sCmd = it->second.commandline;
 270         AddPathParam(sCmd, pathList);
 271         AddMessageFileParam(sCmd, message);
 272         AddParam(sCmd, rev.m_CommitHash.ToString());
 273         AddErrorParam(sCmd, error);
 274         AddCWDParam(sCmd, workingTree);
 275         exitcode = RunScript(sCmd, workingTree, error, it->second.bWait, it->second.bShow);
 276         return true;
 277 }
 278
 279 bool CHooks::PrePush(const CString& workingTree, DWORD& exitcode, CString& error)
 280 {
 281         auto it = FindItem(pre_push_hook, workingTree);
 282         if (it == end())
 283                 return false;
 284         CString sCmd = it->second.commandline;
 285         AddPathParam(sCmd, CTGitPathList(workingTree));
 286         AddErrorParam(sCmd, error);
 287         AddCWDParam(sCmd, workingTree);
 288         exitcode = RunScript(sCmd, workingTree, error, it->second.bWait, it->second.bShow);
 289         return true;
 290 }
 291
 292 bool CHooks::PostPush(const CString& workingTree, DWORD& exitcode, CString& error)
 293 {
 294         auto it = FindItem(post_push_hook, workingTree);
 295         if (it == end())
 296                 return false;
 297         CString sCmd = it->second.commandline;
 298         AddPathParam(sCmd, CTGitPathList(workingTree));
 299         AddErrorParam(sCmd, error);
 300         AddCWDParam(sCmd, workingTree);
 301         exitcode = RunScript(sCmd, workingTree, error, it->second.bWait, it->second.bShow);
 302         return true;
 303 }
 304
 305 bool CHooks::IsHookPresent(hooktype t, const CString& workingTree) const
 306 {
 307         auto it = FindItem(t, workingTree);
 308         return it != end();
 309 }
 310
 311 const_hookiterator CHooks::FindItem(hooktype t, const CString& workingTree) const
 312 {
 313         hookkey key;
 314         CTGitPath path = workingTree;
 315         do
 316         {
 317                 key.htype = t;
 318                 key.path = path;
 319                 auto it = find(key);
 320                 if (it != end())
 321                 {
 322                         return it;
 323                 }
 324                 path = path.GetContainingDirectory();
 325         } while(!path.IsEmpty());
 326         // look for a script with a path as '*'
 327         key.htype = t;
 328         key.path = CTGitPath(_T("*"));
 329         auto it = find(key);
 330         if (it != end())
 331         {
 332                 return it;
 333         }
 334
 335         return end();
 336 }
 337
 338 DWORD CHooks::RunScript(CString cmd, LPCTSTR currentDir, CString& error, bool bWait, bool bShow)
 339 {
 340         DWORD exitcode = 0;
 341         SECURITY_ATTRIBUTES sa;
 342         SecureZeroMemory(&sa, sizeof(sa));
 343         sa.nLength = sizeof(sa);
 344         sa.bInheritHandle = TRUE;
 345
 346         CAutoFile hOut ;
 347         CAutoFile hRedir;
 348         CAutoFile hErr;
 349
 350         // clear the error string
 351         error.Empty();
 352
 353         // Create Temp File for redirection
 354         TCHAR szTempPath[MAX_PATH] = {0};
 355         TCHAR szOutput[MAX_PATH] = {0};
 356         TCHAR szErr[MAX_PATH] = {0};
 357         GetTortoiseGitTempPath(_countof(szTempPath), szTempPath);
 358         GetTempFileName(szTempPath, _T("git"), 0, szErr);
 359
 360         // setup redirection handles
 361         // output handle must be WRITE mode, share READ
 362         // redirect handle must be READ mode, share WRITE
 363         hErr   = CreateFile(szErr, GENERIC_WRITE, FILE_SHARE_READ, &sa, CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY,        0);
 364
 365         if (!hErr)
 366         {
 367                 error = CFormatMessageWrapper();
 368                 return (DWORD)-1;
 369         }
 370
 371         hRedir = CreateFile(szErr, GENERIC_READ, FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0);
 372
 373         if (!hRedir)
 374         {
 375                 error = CFormatMessageWrapper();
 376                 return (DWORD)-1;
 377         }
 378
 379         GetTempFileName(szTempPath, _T("git"), 0, szOutput);
 380         hOut   = CreateFile(szOutput, GENERIC_WRITE, FILE_SHARE_READ, &sa, CREATE_ALWAYS, FILE_ATTRIBUTE_TEMPORARY,     0);
 381
 382         if (!hOut)
 383         {
 384                 error = CFormatMessageWrapper();
 385                 return (DWORD)-1;
 386         }
 387
 388         // setup startup info, set std out/err handles
 389         // hide window
 390         STARTUPINFO si;
 391         SecureZeroMemory(&si, sizeof(si));
 392         si.cb = sizeof(si);
 393         si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
 394         si.hStdOutput = hOut;
 395         si.hStdError = hErr;
 396         si.wShowWindow = bShow ? SW_SHOW : SW_HIDE;
 397
 398         PROCESS_INFORMATION pi;
 399         SecureZeroMemory(&pi, sizeof(pi));
 400
 401         if (!CreateProcess(nullptr, cmd.GetBuffer(), nullptr, nullptr, TRUE, 0, nullptr, currentDir, &si, &pi))
 402         {
 403                 const DWORD err = GetLastError();  // preserve the CreateProcess error
 404                 error = CFormatMessageWrapper(err);
 405                 SetLastError(err);
 406                 cmd.ReleaseBuffer();
 407                 return (DWORD)-1;
 408         }
 409         cmd.ReleaseBuffer();
 410
 411         CloseHandle(pi.hThread);
 412
 413         // wait for process to finish, capture redirection and
 414         // send it to the parent window/console
 415         if (bWait)
 416         {
 417                 DWORD dw;
 418                 char buf[256] = { 0 };
 419                 do
 420                 {
 421                         while (ReadFile(hRedir, &buf, sizeof(buf)-1, &dw, NULL))
 422                         {
 423                                 if (dw == 0)
 424                                         break;
 425                                 error += CString(CStringA(buf,dw));
 426                         }
 427                         Sleep(150);
 428                 } while (WaitForSingleObject(pi.hProcess, 0) != WAIT_OBJECT_0);
 429
 430                 // perform any final flushing
 431                 while (ReadFile(hRedir, &buf, sizeof(buf)-1, &dw, NULL))
 432                 {
 433                         if (dw == 0)
 434                                 break;
 435
 436                         error += CString(CStringA(buf, dw));
 437                 }
 438                 WaitForSingleObject(pi.hProcess, INFINITE);
 439                 GetExitCodeProcess(pi.hProcess, &exitcode);
 440         }
 441         CloseHandle(pi.hProcess);
 442         DeleteFile(szOutput);
 443         DeleteFile(szErr);
 444
 445         return exitcode;
 446 }
 447