Initialize variable

[svn-all-fast-export.git] / src / repository.cpp

diff --git a/src/repository.cpp b/src/repository.cpp
index 966b73dfee75580d4e22e626cfc103c52ebd39f0..72bbd602b7d2cfe20b6358a9998c831546c607f0 100644 (file)
--- a/src/repository.cpp
+++ b/src/repository.cpp
@@ -17,34 +17,96 @@
 
 #include "repository.h"
 #include <QTextStream>
+#include <QDebug>
 
 Repository::Repository(const Rules::Repository &rule)
+    : name(rule.name), commitCount(0), processHasStarted(false)
 {
     foreach (Rules::Repository::Branch branchRule, rule.branches) {
         Branch branch;
-        branch.branchFrom = branchRule.branchFrom;
-        branch.isCreated = false;
+        branch.created = 0;     // not created
 
         branches.insert(branchRule.name, branch);
     }
 
-    fastImport.setWorkingDirectory(rule.name);
-    fastImport.setProcessChannelMode(QProcess::ForwardedChannels);
+    // create the default branch
+    branches["master"].created = 1;
+
+    fastImport.setWorkingDirectory(name);
 }
 
 Repository::~Repository()
 {
-    if (fastImport.state() == QProcess::Running) {
+    if (fastImport.state() != QProcess::NotRunning) {
         fastImport.closeWriteChannel();
         fastImport.waitForFinished();
     }
 }
 
+void Repository::reloadBranches()
+{
+    QProcess revParse;
+    revParse.setWorkingDirectory(name);
+    revParse.start("git", QStringList() << "rev-parse" << "--symbolic" << "--branches");
+    revParse.waitForFinished();
+
+    if (revParse.exitCode() == 0 && revParse.bytesAvailable()) {
+        startFastImport();
+
+        while (revParse.canReadLine()) {
+            QByteArray branchName = revParse.readLine().trimmed();
+
+            branches[branchName].created = 1;
+            fastImport.write("reset refs/heads/" + branchName +
+                             "\nfrom refs/heads/" + branchName + "^0\n\n");
+        }
+    }
+}
+
+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))
-        return 0;
+    if (!branches.contains(branch)) {
+        qWarning() << branch << "is not a known branch in repository" << name << endl
+                   << "Going to create it automatically";
+    }
 
     Transaction *txn = new Transaction;
     txn->repository = this;
@@ -54,11 +116,33 @@ Repository::Transaction *Repository::newTransaction(const QString &branch, const
     txn->revnum = revnum;
     txn->lastmark = revnum;
 
-    if (fastImport.state() == QProcess::NotRunning)
+    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
-        fastImport.start("git-fast-import", QStringList());
+        QString outputFile = name;
+        outputFile.replace('/', '_');
+        outputFile.prepend("log-");
+        fastImport.setStandardOutputFile(outputFile, QIODevice::Append);
+        fastImport.setProcessChannelMode(QProcess::MergedChannels);
 
-    return txn;
+#ifndef DRY_RUN
+        fastImport.start("git-fast-import", QStringList());
+#else
+        fastImport.start("/bin/cat", QStringList());
+#endif
+    }
 }
 
 Repository::Transaction::~Transaction()
@@ -91,12 +175,13 @@ QIODevice *Repository::Transaction::addFile(const QString &path, int mode, qint6
     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);
-    repository->fastImport.waitForBytesWritten(0);
+#endif
 
     modifiedFiles.insert(path, fp);
     return &repository->fastImport;
@@ -108,32 +193,37 @@ void Repository::Transaction::commit()
     QByteArray message = log;
     if (!message.endsWith('\n'))
         message += '\n';
-    message += "\nsvn=" + svnprefix + "; revision=" + QByteArray::number(revnum) + "\n";
+    message += "\nsvn path=" + svnprefix + "; revision=" + QByteArray::number(revnum) + "\n";
 
     {
         QByteArray branchRef = branch;
-        if (!branchRef.startsWith("refs/heads/"))
+        if (!branchRef.startsWith("refs/"))
             branchRef.prepend("refs/heads/");
 
         QTextStream s(&repository->fastImport);
         s << "commit " << branchRef << endl;
         s << "mark :" << revnum << endl;
-        s << "committer " << author << ' ' << datetime << "-0000" << endl;
+        s << "committer " << QString::fromUtf8(author) << ' ' << datetime << " -0000" << endl;
 
         Branch &br = repository->branches[branch];
-        if (!br.isCreated) {
-            br.isCreated = true;
-            s << "from " << br.branchFrom << endl;
+        if (!br.created) {
+            qWarning() << "Branch" << branch << "in repository" << repository->name << "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
-    foreach (QString df, deletedFiles)
-        repository->fastImport.write("D " + df.toUtf8() + "\n");
+    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();
@@ -149,7 +239,7 @@ void Repository::Transaction::commit()
 
     repository->fastImport.write("\n");
 
-    while (repository->fastImport.bytesToWrite() && repository->fastImport.waitForBytesWritten()) {
-        // nothing
-    }
+    while (repository->fastImport.bytesToWrite())
+        if (!repository->fastImport.waitForBytesWritten(-1))
+            qFatal("Failed to write to process: %s", qPrintable(repository->fastImport.errorString()));
 }