2 * Copyright (C) 2007 Thiago Macieira <thiago@kde.org>
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.
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.
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/>.
18 #include "repository.h"
20 #include <QTextStream>
22 #include <QLinkedList>
24 static const int maxSimultaneousProcesses
= 100;
26 class ProcessCache
: QLinkedList
<Repository
*>
29 void touch(Repository
*repo
)
33 // if the cache is too big, remove from the front
34 while (size() >= maxSimultaneousProcesses
)
35 takeFirst()->closeFastImport();
41 inline void remove(Repository
*repo
)
46 static ProcessCache processCache
;
48 Repository::Repository(const Rules::Repository
&rule
)
49 : name(rule
.name
), commitCount(0), outstandingTransactions(0), processHasStarted(false)
51 foreach (Rules::Repository::Branch branchRule
, rule
.branches
) {
53 branch
.created
= 0; // not created
55 branches
.insert(branchRule
.name
, branch
);
58 // create the default branch
59 branches
["master"].created
= 1;
61 fastImport
.setWorkingDirectory(name
);
64 Repository::~Repository()
66 Q_ASSERT(outstandingTransactions
== 0);
70 void Repository::closeFastImport()
72 if (fastImport
.state() != QProcess::NotRunning
) {
73 fastImport
.write("checkpoint\n");
74 fastImport
.waitForBytesWritten(-1);
75 fastImport
.closeWriteChannel();
76 if (!fastImport
.waitForFinished()) {
77 fastImport
.terminate();
78 if (!fastImport
.waitForFinished(200))
79 qWarning() << "git-fast-import for repository" << name
<< "did not die";
82 processHasStarted
= false;
83 processCache
.remove(this);
86 void Repository::reloadBranches()
89 revParse
.setWorkingDirectory(name
);
90 revParse
.start("git", QStringList() << "rev-parse" << "--symbolic" << "--branches");
91 revParse
.waitForFinished(-1);
93 if (revParse
.exitCode() == 0 && revParse
.bytesAvailable()) {
94 while (revParse
.canReadLine()) {
95 QByteArray branchName
= revParse
.readLine().trimmed();
97 //qDebug() << "Repo" << name << "reloaded branch" << branchName;
98 branches
[branchName
].created
= 1;
99 fastImport
.write("reset refs/heads/" + branchName
+
100 "\nfrom refs/heads/" + branchName
+ "^0\n\n"
101 "progress Branch refs/heads/" + branchName
+ " reloaded\n");
106 void Repository::createBranch(const QString
&branch
, int revnum
,
107 const QString
&branchFrom
, int)
110 if (!branches
.contains(branch
)) {
111 qWarning() << branch
<< "is not a known branch in repository" << name
<< endl
112 << "Going to create it automatically";
115 QByteArray branchRef
= branch
.toUtf8();
116 if (!branchRef
.startsWith("refs/"))
117 branchRef
.prepend("refs/heads/");
119 Branch
&br
= branches
[branch
];
120 if (br
.created
&& br
.created
!= revnum
) {
121 QByteArray backupBranch
= branchRef
+ '_' + QByteArray::number(revnum
);
122 qWarning() << branch
<< "already exists; backing up to" << backupBranch
;
124 fastImport
.write("reset " + backupBranch
+ "\nfrom " + branchRef
+ "\n\n");
127 // now create the branch
129 QByteArray branchFromRef
= branchFrom
.toUtf8();
130 if (!branchFromRef
.startsWith("refs/"))
131 branchFromRef
.prepend("refs/heads/");
133 if (!branches
.contains(branchFrom
) || !branches
.value(branchFrom
).created
) {
134 qCritical() << branch
<< "in repository" << name
135 << "is branching from branch" << branchFrom
136 << "but the latter doesn't exist. Can't continue.";
140 fastImport
.write("reset " + branchRef
+ "\nfrom " + branchFromRef
+ "\n\n"
141 "progress Branch " + branchRef
+ " created from " + branchFromRef
+ "\n\n");
144 Repository::Transaction
*Repository::newTransaction(const QString
&branch
, const QString
&svnprefix
,
148 if (!branches
.contains(branch
)) {
149 qWarning() << branch
<< "is not a known branch in repository" << name
<< endl
150 << "Going to create it automatically";
153 Transaction
*txn
= new Transaction
;
154 txn
->repository
= this;
155 txn
->branch
= branch
.toUtf8();
156 txn
->svnprefix
= svnprefix
.toUtf8();
158 txn
->revnum
= revnum
;
160 if ((++commitCount
% 10000) == 0)
161 // write everything to disk every 10000 commits
162 fastImport
.write("checkpoint\n");
163 if (outstandingTransactions
++ == 0)
164 lastmark
= 1; // reset the mark number
168 void Repository::startFastImport()
170 if (fastImport
.state() == QProcess::NotRunning
) {
171 if (processHasStarted
)
172 qFatal("git-fast-import has been started once and crashed?");
173 processHasStarted
= true;
176 QString outputFile
= name
;
177 outputFile
.replace('/', '_');
178 outputFile
.prepend("log-");
179 fastImport
.setStandardOutputFile(outputFile
, QIODevice::Append
);
180 fastImport
.setProcessChannelMode(QProcess::MergedChannels
);
183 fastImport
.start("git", QStringList() << "fast-import");
185 fastImport
.start("/bin/cat", QStringList());
192 Repository::Transaction::~Transaction()
194 --repository
->outstandingTransactions
;
197 void Repository::Transaction::setAuthor(const QByteArray
&a
)
202 void Repository::Transaction::setDateTime(uint dt
)
207 void Repository::Transaction::setLog(const QByteArray
&l
)
212 void Repository::Transaction::deleteFile(const QString
&path
)
214 deletedFiles
.append(path
);
217 QIODevice
*Repository::Transaction::addFile(const QString
&path
, int mode
, qint64 length
)
219 int mark
= ++repository
->lastmark
;
221 if (modifiedFiles
.capacity() == 0)
222 modifiedFiles
.reserve(2048);
223 modifiedFiles
.append("M ");
224 modifiedFiles
.append(QByteArray::number(mode
, 8));
225 modifiedFiles
.append(" :");
226 modifiedFiles
.append(QByteArray::number(mark
));
227 modifiedFiles
.append(' ');
228 modifiedFiles
.append(path
.toUtf8());
229 modifiedFiles
.append("\n");
232 repository
->fastImport
.write("blob\nmark :");
233 repository
->fastImport
.write(QByteArray::number(mark
));
234 repository
->fastImport
.write("\ndata ");
235 repository
->fastImport
.write(QByteArray::number(length
));
236 repository
->fastImport
.write("\n", 1);
239 return &repository
->fastImport
;
242 void Repository::Transaction::commit()
244 processCache
.touch(repository
);
246 // create the commit message
247 QByteArray message
= log
;
248 if (!message
.endsWith('\n'))
250 if (Options::globalOptions
->switches
.value("metadata", true))
251 message
+= "\nsvn path=" + svnprefix
+ "; revision=" + QByteArray::number(revnum
) + "\n";
254 QByteArray branchRef
= branch
;
255 if (!branchRef
.startsWith("refs/"))
256 branchRef
.prepend("refs/heads/");
258 QTextStream
s(&repository
->fastImport
);
259 s
<< "commit " << branchRef
<< endl
;
260 s
<< "committer " << QString::fromUtf8(author
) << ' ' << datetime
<< " -0000" << endl
;
262 Branch
&br
= repository
->branches
[branch
];
264 qWarning() << "Branch" << branch
<< "in repository" << repository
->name
<< "doesn't exist at revision"
265 << revnum
<< "-- did you resume from the wrong revision?";
269 s
<< "data " << message
.length() << endl
;
272 repository
->fastImport
.write(message
);
273 repository
->fastImport
.putChar('\n');
275 // write the file deletions
276 if (deletedFiles
.contains(""))
277 repository
->fastImport
.write("deleteall\n");
279 foreach (QString df
, deletedFiles
)
280 repository
->fastImport
.write("D " + df
.toUtf8() + "\n");
282 // write the file modifications
283 repository
->fastImport
.write(modifiedFiles
);
285 repository
->fastImport
.write("\nprogress Commit #" +
286 QByteArray::number(repository
->commitCount
) +
287 " branch " + branch
+
288 " = SVN r" + QByteArray::number(revnum
) + "\n\n");
289 printf(" %d modifications to \"%s\"",
290 deletedFiles
.count() + modifiedFiles
.count(),
291 qPrintable(repository
->name
));
293 while (repository
->fastImport
.bytesToWrite())
294 if (!repository
->fastImport
.waitForBytesWritten(-1))
295 qFatal("Failed to write to process: %s", qPrintable(repository
->fastImport
.errorString()));