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/*
* Copyright (C) 2007 Thiago Macieira <thiago@kde.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "repository.h"
#include <QTextStream>
#include <QDebug>
Repository::Repository(const Rules::Repository &rule)
: name(rule.name), processHasStarted(false)
{
foreach (Rules::Repository::Branch branchRule, rule.branches) {
Branch branch;
branch.created = 0; // not created
branches.insert(branchRule.name, branch);
}
// create the default branch
branches["master"].created = 1;
fastImport.setWorkingDirectory(name);
}
Repository::~Repository()
{
if (fastImport.state() != QProcess::NotRunning) {
fastImport.closeWriteChannel();
fastImport.waitForFinished();
}
}
void Repository::reloadBranches()
{
QHash<QString, Branch>::Iterator it = branches.begin(),
end = branches.end();
for ( ; it != end; ++it) {
QString branchRef = it.key();
if (!branchRef.startsWith("refs/"))
branchRef.prepend("refs/heads/");
bool branchExists;
// does this branch already exist?
QProcess revParse;
revParse.setWorkingDirectory(name);
revParse.start("git-rev-parse", QStringList() << "--verify" << branchRef);
revParse.waitForFinished();
if (revParse.exitCode() == 0)
branchExists = true;
else
branchExists = false;
if (branchExists) {
startFastImport();
fastImport.write("reset " + branchRef.toUtf8() +
"\nfrom " + branchRef.toUtf8() + "^0\n\n");
it->created = 1;
}
}
}
void Repository::createBranch(const QString &branch, int revnum,
const QString &branchFrom, int)
{
if (!branches.contains(branch)) {
qWarning() << branch << "is not a known branch in repository" << name << endl
<< "Going to create it automatically";
}
startFastImport();
QByteArray branchRef = branch.toUtf8();
if (!branchRef.startsWith("refs/"))
branchRef.prepend("refs/heads/");
Branch &br = branches[branch];
if (br.created && br.created != revnum) {
QByteArray backupBranch = branchRef + '_' + QByteArray::number(revnum);
qWarning() << branch << "already exists; backing up to" << backupBranch;
fastImport.write("reset " + backupBranch + "\nfrom " + branchRef + "\n\n");
}
// now create the branch
br.created = revnum;
QByteArray branchFromRef = branchFrom.toUtf8();
if (!branchFromRef.startsWith("refs/"))
branchFromRef.prepend("refs/heads/");
if (!branches.contains(branchFrom) || !branches.value(branchFrom).created) {
qCritical() << branch << "in repository" << name
<< "is branching from branch" << branchFrom
<< "but the latter doesn't exist. Can't continue.";
exit(1);
}
fastImport.write("reset " + branchRef + "\nfrom " + branchFromRef + "\n\n");
}
Repository::Transaction *Repository::newTransaction(const QString &branch, const QString &svnprefix,
int revnum)
{
if (!branches.contains(branch)) {
qCritical() << branch << "is not a known branch in repository" << name;
return 0;
}
Transaction *txn = new Transaction;
txn->repository = this;
txn->branch = branch.toUtf8();
txn->svnprefix = svnprefix.toUtf8();
txn->datetime = 0;
txn->revnum = revnum;
txn->lastmark = revnum;
startFastImport();
if ((++commitCount % 10000) == 0)
// write everything to disk every 10000 commits
fastImport.write("checkpoint\n");
return txn;
}
void Repository::startFastImport()
{
if (fastImport.state() == QProcess::NotRunning) {
if (processHasStarted)
qFatal("git-fast-import has been started once and crashed?");
processHasStarted = true;
// start the process
QString outputFile = name;
outputFile.replace('/', '_');
outputFile.prepend("log-");
fastImport.setStandardOutputFile(outputFile, QIODevice::Append);
fastImport.setProcessChannelMode(QProcess::MergedChannels);
#ifndef DRY_RUN
fastImport.start("git-fast-import", QStringList());
#else
fastImport.start("/bin/cat", QStringList());
#endif
}
}
Repository::Transaction::~Transaction()
{
}
void Repository::Transaction::setAuthor(const QByteArray &a)
{
author = a;
}
void Repository::Transaction::setDateTime(uint dt)
{
datetime = dt;
}
void Repository::Transaction::setLog(const QByteArray &l)
{
log = l;
}
void Repository::Transaction::deleteFile(const QString &path)
{
deletedFiles.append(path);
}
QIODevice *Repository::Transaction::addFile(const QString &path, int mode, qint64 length)
{
FileProperties fp;
fp.mode = mode;
fp.mark = ++lastmark;
#ifndef DRY_RUN
repository->fastImport.write("blob\nmark :");
repository->fastImport.write(QByteArray::number(fp.mark));
repository->fastImport.write("\ndata ");
repository->fastImport.write(QByteArray::number(length));
repository->fastImport.write("\n", 1);
#endif
modifiedFiles.insert(path, fp);
return &repository->fastImport;
}
void Repository::Transaction::commit()
{
// create the commit message
QByteArray message = log;
if (!message.endsWith('\n'))
message += '\n';
message += "\nsvn path=" + svnprefix + "; revision=" + QByteArray::number(revnum) + "\n";
{
QByteArray branchRef = branch;
if (!branchRef.startsWith("refs/"))
branchRef.prepend("refs/heads/");
QTextStream s(&repository->fastImport);
s << "commit " << branchRef << endl;
s << "mark :" << revnum << endl;
s << "committer " << QString::fromUtf8(author) << ' ' << datetime << " -0000" << endl;
Branch &br = repository->branches[branch];
if (!br.created) {
qWarning() << "Branch" << branch << "doesn't exist at revision"
<< revnum << "-- did you resume from the wrong revision?";
br.created = revnum;
}
s << "data " << message.length() << endl;
}
repository->fastImport.write(message);
repository->fastImport.putChar('\n');
// write the file deletions
if (deletedFiles.contains(""))
repository->fastImport.write("deleteall\n");
else
foreach (QString df, deletedFiles)
repository->fastImport.write("D " + df.toUtf8() + "\n");
// write the file modifications
QHash<QString, FileProperties>::ConstIterator it = modifiedFiles.constBegin();
for ( ; it != modifiedFiles.constEnd(); ++it) {
repository->fastImport.write("M ", 2);
repository->fastImport.write(QByteArray::number(it->mode, 8));
repository->fastImport.write(" :", 2);
repository->fastImport.write(QByteArray::number(it->mark));
repository->fastImport.write(" ", 1);
repository->fastImport.write(it.key().toUtf8());
repository->fastImport.write("\n", 1);
}
repository->fastImport.write("\n");
while (repository->fastImport.bytesToWrite())
if (!repository->fastImport.waitForBytesWritten(-1))
qFatal("Failed to write to process: %s", qPrintable(repository->fastImport.errorString()));
}
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