src/repository.cpp

   1 /*
   2  *  Copyright (C) 2007  Thiago Macieira <thiago@kde.org>
   3  *
   4  *  This program is free software: you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation, either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "repository.h"
  19 #include <QTextStream>
  20 #include <QDebug>
  21
  22 Repository::Repository(const Rules::Repository &rule)
  23     : name(rule.name)
  24 {
  25     foreach (Rules::Repository::Branch branchRule, rule.branches) {
  26         Branch branch;
  27         branch.isCreated = false;
  28
  29         branches.insert(branchRule.name, branch);
  30     }
  31
  32     // create the default branch
  33     branches["master"].isCreated = true;
  34
  35     fastImport.setWorkingDirectory(name);
  36 }
  37
  38 Repository::~Repository()
  39 {
  40     if (fastImport.state() != QProcess::NotRunning) {
  41         fastImport.closeWriteChannel();
  42         fastImport.waitForFinished();
  43     }
  44 }
  45
  46 void Repository::reloadBranches()
  47 {
  48     QHash<QString, Branch>::Iterator it = branches.begin(),
  49                                     end = branches.end();
  50     for ( ; it != end; ++it) {
  51         QString branchRef = it.key();
  52         if (!branchRef.startsWith("refs/"))
  53             branchRef.prepend("refs/heads/");
  54
  55         bool branchExists;
  56         // does this branch already exist?
  57         QProcess revParse;
  58         revParse.setWorkingDirectory(name);
  59         revParse.start("git-rev-parse", QStringList() << "--verify" << branchRef);
  60         revParse.waitForFinished();
  61
  62         if (revParse.exitCode() == 0)
  63             branchExists = true;
  64         else
  65             branchExists = false;
  66
  67         if (branchExists) {
  68             startFastImport();
  69             fastImport.write("reset " + branchRef.toUtf8() +
  70                              "\nfrom " + branchRef.toUtf8() + "^0\n\n");
  71             it->isCreated = true;
  72         }
  73     }
  74 }
  75
  76 void Repository::createBranch(const QString &branch, int revnum,
  77                               const QString &branchFrom, int)
  78 {
  79     if (!branches.contains(branch)) {
  80         qCritical() << branch << "is not a known branch in repository" << name;
  81         exit(1);
  82     }
  83
  84     startFastImport();
  85     QByteArray branchRef = branch.toUtf8();
  86     if (!branchRef.startsWith("refs/"))
  87         branchRef.prepend("refs/heads/");
  88
  89     Branch &br = branches[branch];
  90     if (br.isCreated) {
  91         QByteArray backupBranch = branchRef + '_' + QByteArray::number(revnum);
  92         qWarning() << branch << "already exists; backing up to" << backupBranch;
  93
  94         fastImport.write("reset " + backupBranch + "\nfrom " + branchRef + "\n\n");
  95     }
  96
  97     // now create the branch
  98     br.isCreated = true;
  99     QByteArray branchFromRef = branchFrom.toUtf8();
 100     if (!branchFromRef.startsWith("refs/"))
 101         branchFromRef.prepend("refs/heads/");
 102
 103     fastImport.write("reset " + branchRef + "\nfrom " + branchFromRef + "\n\n");
 104 }
 105
 106 Repository::Transaction *Repository::newTransaction(const QString &branch, const QString &svnprefix,
 107                                                     int revnum)
 108 {
 109     if (!branches.contains(branch)) {
 110         qCritical() << branch << "is not a known branch in repository" << name;
 111         return 0;
 112     }
 113
 114     Transaction *txn = new Transaction;
 115     txn->repository = this;
 116     txn->branch = branch.toUtf8();
 117     txn->svnprefix = svnprefix.toUtf8();
 118     txn->datetime = 0;
 119     txn->revnum = revnum;
 120     txn->lastmark = revnum;
 121
 122     startFastImport();
 123     return txn;
 124 }
 125
 126 void Repository::startFastImport()
 127 {
 128     if (fastImport.state() == QProcess::NotRunning) {
 129         // start the process
 130 #ifndef DRY_RUN
 131         fastImport.setProcessChannelMode(QProcess::ForwardedChannels);
 132         fastImport.start("git-fast-import", QStringList());
 133 #else
 134         QString outputFile = name;
 135         outputFile.replace('/', '_');
 136         fastImport.setStandardOutputFile(outputFile, QIODevice::Append);
 137         fastImport.start("/bin/cat", QStringList());
 138 #endif
 139     }
 140 }
 141
 142 Repository::Transaction::~Transaction()
 143 {
 144 }
 145
 146 void Repository::Transaction::setAuthor(const QByteArray &a)
 147 {
 148     author = a;
 149 }
 150
 151 void Repository::Transaction::setDateTime(uint dt)
 152 {
 153     datetime = dt;
 154 }
 155
 156 void Repository::Transaction::setLog(const QByteArray &l)
 157 {
 158     log = l;
 159 }
 160
 161 void Repository::Transaction::deleteFile(const QString &path)
 162 {
 163     deletedFiles.append(path);
 164 }
 165
 166 QIODevice *Repository::Transaction::addFile(const QString &path, int mode, qint64 length)
 167 {
 168     FileProperties fp;
 169     fp.mode = mode;
 170     fp.mark = ++lastmark;
 171
 172 #ifndef DRY_RUN
 173     repository->fastImport.write("blob\nmark :");
 174     repository->fastImport.write(QByteArray::number(fp.mark));
 175     repository->fastImport.write("\ndata ");
 176     repository->fastImport.write(QByteArray::number(length));
 177     repository->fastImport.write("\n", 1);
 178     repository->fastImport.waitForBytesWritten(0);
 179 #endif
 180
 181     modifiedFiles.insert(path, fp);
 182     return &repository->fastImport;
 183 }
 184
 185 void Repository::Transaction::commit()
 186 {
 187     // create the commit message
 188     QByteArray message = log;
 189     if (!message.endsWith('\n'))
 190         message += '\n';
 191     message += "\nsvn path=" + svnprefix + "; revision=" + QByteArray::number(revnum) + "\n";
 192
 193     {
 194         QByteArray branchRef = branch;
 195         if (!branchRef.startsWith("refs/"))
 196             branchRef.prepend("refs/heads/");
 197
 198         QTextStream s(&repository->fastImport);
 199         s << "commit " << branchRef << endl;
 200         s << "mark :" << revnum << endl;
 201         s << "committer " << author << ' ' << datetime << " -0000" << endl;
 202
 203         Branch &br = repository->branches[branch];
 204         if (!br.isCreated) {
 205             br.isCreated = true;
 206         }
 207
 208         s << "data " << message.length() << endl;
 209     }
 210
 211     repository->fastImport.write(message);
 212
 213     // write the file deletions
 214     if (deletedFiles.contains(""))
 215         repository->fastImport.write("deleteall\n");
 216     else
 217         foreach (QString df, deletedFiles)
 218             repository->fastImport.write("D " + df.toUtf8() + "\n");
 219
 220     // write the file modifications
 221     QHash<QString, FileProperties>::ConstIterator it = modifiedFiles.constBegin();
 222     for ( ; it != modifiedFiles.constEnd(); ++it) {
 223         repository->fastImport.write("M ", 2);
 224         repository->fastImport.write(QByteArray::number(it->mode, 8));
 225         repository->fastImport.write(" :", 2);
 226         repository->fastImport.write(QByteArray::number(it->mark));
 227         repository->fastImport.write(" ", 1);
 228         repository->fastImport.write(it.key().toUtf8());
 229         repository->fastImport.write("\n", 1);
 230     }
 231
 232     repository->fastImport.write("\n");
 233
 234     while (repository->fastImport.bytesToWrite() && repository->fastImport.waitForBytesWritten()) {
 235         // nothing
 236     }
 237 }