src/Git/GitAdminDir.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2008-2015 - TortoiseGit
   4 // Copyright (C) 2003-2008 - 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 "UnicodeUtils.h"
  22 #include "GitAdminDir.h"
  23 #include "Git.h"
  24 #include "SmartHandle.h"
  25
  26 GitAdminDir::GitAdminDir()
  27 {
  28 }
  29
  30 GitAdminDir::~GitAdminDir()
  31 {
  32 }
  33
  34 CString GitAdminDir::GetSuperProjectRoot(const CString& path)
  35 {
  36         CString projectroot=path;
  37
  38         do
  39         {
  40                 if (CGit::GitPathFileExists(projectroot + _T("\\.git")))
  41                 {
  42                         if (CGit::GitPathFileExists(projectroot + _T("\\.gitmodules")))
  43                                 return projectroot;
  44                         else
  45                                 return _T("");
  46                 }
  47
  48                 projectroot = projectroot.Left(projectroot.ReverseFind('\\'));
  49
  50                 // don't check for \\COMPUTERNAME\.git
  51                 if (projectroot[0] == _T('\\') && projectroot[1] == _T('\\') && projectroot.Find(_T('\\'), 2) < 0)
  52                         return _T("");
  53         }while(projectroot.ReverseFind('\\')>0);
  54
  55         return _T("");
  56 }
  57
  58 CString GitAdminDir::GetGitTopDir(const CString& path)
  59 {
  60         CString str;
  61         HasAdminDir(path,!!PathIsDirectory(path),&str);
  62         return str;
  63 }
  64
  65 bool GitAdminDir::IsWorkingTreeOrBareRepo(const CString& path)
  66 {
  67         return HasAdminDir(path) || IsBareRepo(path);
  68 }
  69
  70 bool GitAdminDir::HasAdminDir(const CString& path)
  71 {
  72         return HasAdminDir(path, !!PathIsDirectory(path));
  73 }
  74
  75 bool GitAdminDir::HasAdminDir(const CString& path,CString* ProjectTopDir)
  76 {
  77         return HasAdminDir(path, !!PathIsDirectory(path),ProjectTopDir);
  78 }
  79
  80 bool GitAdminDir::HasAdminDir(const CString& path, bool bDir, CString* ProjectTopDir)
  81 {
  82         if (path.IsEmpty())
  83                 return false;
  84         CString sDirName = path;
  85         if (!bDir)
  86         {
  87                 // e.g "C:\"
  88                 if (path.GetLength() <= 3)
  89                         return false;
  90                 sDirName = path.Left(path.ReverseFind(_T('\\')));
  91         }
  92
  93         // a .git dir or anything inside it should be left out, only interested in working copy files -- Myagi
  94         int n = 0;
  95         for (;;)
  96         {
  97                 n = sDirName.Find(_T("\\.git"), n);
  98                 if (n < 0)
  99                         break;
 100
 101                 // check for actual .git dir (and not .gitignore or something else), continue search if false match
 102                 n += 5;
 103                 if (sDirName[n] == _T('\\') || sDirName[n] == 0)
 104                         return false;
 105         }
 106
 107         for (;;)
 108         {
 109                 if(CGit::GitPathFileExists(sDirName + _T("\\.git")))
 110                 {
 111                         if(ProjectTopDir)
 112                         {
 113                                 *ProjectTopDir=sDirName;
 114                                 // Make sure to add the trailing slash to root paths such as 'C:'
 115                                 if (sDirName.GetLength() == 2 && sDirName[1] == _T(':'))
 116                                         (*ProjectTopDir) += _T("\\");
 117                         }
 118                         return true;
 119                 }
 120                 else if (IsBareRepo(sDirName))
 121                         return false;
 122
 123                 int x = sDirName.ReverseFind(_T('\\'));
 124                 if (x < 2)
 125                         break;
 126
 127                 sDirName = sDirName.Left(x);
 128                 // don't check for \\COMPUTERNAME\.git
 129                 if (sDirName[0] == _T('\\') && sDirName[1] == _T('\\') && sDirName.Find(_T('\\'), 2) < 0)
 130                         break;
 131         }
 132
 133         return false;
 134 }
 135 /**
 136  * Returns the .git-path (if .git is a file, read the repository path and return it)
 137  * adminDir always ends with "\"
 138  */
 139 bool GitAdminDir::GetAdminDirPath(const CString &projectTopDir, CString& adminDir)
 140 {
 141         if (IsBareRepo(projectTopDir))
 142         {
 143                 adminDir = projectTopDir;
 144                 adminDir.TrimRight('\\');
 145                 adminDir.Append(_T("\\"));
 146                 return true;
 147         }
 148
 149         CString sDotGitPath = projectTopDir + _T("\\") + GetAdminDirName();
 150         if (CTGitPath(sDotGitPath).IsDirectory())
 151         {
 152                 sDotGitPath.TrimRight('\\');
 153                 sDotGitPath.Append(_T("\\"));
 154                 adminDir = sDotGitPath;
 155                 return true;
 156         }
 157         else
 158         {
 159                 CString result = ReadGitLink(projectTopDir, sDotGitPath);
 160                 if (result.IsEmpty())
 161                         return false;
 162                 adminDir = result + _T("\\");
 163                 return true;
 164         }
 165 }
 166
 167 CString GitAdminDir::ReadGitLink(const CString& topDir, const CString& dotGitPath)
 168 {
 169         CAutoFILE pFile = _tfsopen(dotGitPath, _T("r"), SH_DENYWR);
 170
 171         if (!pFile)
 172                 return _T("");
 173
 174         int size = 65536;
 175         auto buffer = std::make_unique<char[]>(size);
 176         int length = (int)fread(buffer.get(), sizeof(char), size, pFile);
 177         CStringA gitPathA(buffer.get(), length);
 178         if (length < 8 || gitPathA.Left(8) != "gitdir: ")
 179                 return _T("");
 180         CString gitPath = CUnicodeUtils::GetUnicode(gitPathA);
 181         // trim after converting to UTF-16, because CStringA trim does not work when having UTF-8 chars
 182         gitPath = gitPath.Trim().Mid(8); // 8 = len("gitdir: ")
 183         gitPath.Replace('/', '\\');
 184         gitPath.TrimRight('\\');
 185         if (!gitPath.IsEmpty() && gitPath[0] == _T('.'))
 186         {
 187                 gitPath = topDir + _T("\\") + gitPath;
 188                 CString adminDir;
 189                 PathCanonicalize(CStrBuf(adminDir, MAX_PATH), gitPath);
 190                 return adminDir;
 191         }
 192         return gitPath;
 193 }
 194
 195 bool GitAdminDir::IsAdminDirPath(const CString& path)
 196 {
 197         if (path.IsEmpty())
 198                 return false;
 199         bool bIsAdminDir = false;
 200         CString lowerpath = path;
 201         lowerpath.MakeLower();
 202         int ind1 = 0;
 203         while ((ind1 = lowerpath.Find(_T("\\.git"), ind1))>=0)
 204         {
 205                 int ind = ind1++;
 206                 if (ind == (lowerpath.GetLength() - 5))
 207                 {
 208                         bIsAdminDir = true;
 209                         break;
 210                 }
 211                 else if (lowerpath.Find(_T("\\.git\\"), ind)>=0)
 212                 {
 213                         bIsAdminDir = true;
 214                         break;
 215                 }
 216         }
 217
 218         return bIsAdminDir;
 219 }
 220
 221 bool GitAdminDir::IsBareRepo(const CString& path)
 222 {
 223         if (path.IsEmpty())
 224                 return false;
 225
 226         if (IsAdminDirPath(path))
 227                 return false;
 228
 229         // don't check for \\COMPUTERNAME\HEAD
 230         if (path[0] == _T('\\') && path[1] == _T('\\'))
 231         {
 232                 if (path.Find(_T('\\'), 2) < 0)
 233                         return false;
 234         }
 235
 236         if (!PathFileExists(path + _T("\\HEAD")) || !PathFileExists(path + _T("\\config")))
 237                 return false;
 238
 239         if (!PathFileExists(path + _T("\\objects\\")) || !PathFileExists(path + _T("\\refs\\")))
 240                 return false;
 241
 242         return true;
 243 }