Wait forever. Not very efficient, but works.

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

diff --git a/src/repository.cpp b/src/repository.cpp
index 3bbbe7ec012c74cd0cdf459b9024c2f6f525d03d..aef71a16e70e846d1de5d63711aa660a016e534a 100644 (file)
--- a/src/repository.cpp
+++ b/src/repository.cpp
@@ -20,21 +20,19 @@
 #include <QDebug>
 
 Repository::Repository(const Rules::Repository &rule)
-    : name(rule.name)
+    : name(rule.name), 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);
     }
 
     // create the default branch
-    branches["master"].isCreated = true;
+    branches["master"].created = 1;
 
     fastImport.setWorkingDirectory(name);
-    fastImport.setProcessChannelMode(QProcess::ForwardedChannels);
 }
 
 Repository::~Repository()
@@ -51,7 +49,7 @@ void Repository::reloadBranches()
                                     end = branches.end();
     for ( ; it != end; ++it) {
         QString branchRef = it.key();
-        if (!branchRef.startsWith("refs/heads/"))
+        if (!branchRef.startsWith("refs/"))
             branchRef.prepend("refs/heads/");
 
         bool branchExists;
@@ -70,16 +68,46 @@ void Repository::reloadBranches()
             startFastImport();
             fastImport.write("reset " + branchRef.toUtf8() +
                              "\nfrom " + branchRef.toUtf8() + "^0\n\n");
-            it->isCreated = true;
+            it->created = 1;
         }
     }
 }
 
+void Repository::createBranch(const QString &branch, int revnum,
+                              const QString &branchFrom, int)
+{
+    if (!branches.contains(branch)) {
+        qCritical() << branch << "is not a known branch in repository" << name;
+        exit(1);
+    }
+
+    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/");
+
+    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 known in repository" << name;
+        qCritical() << branch << "is not a known branch in repository" << name;
         return 0;
     }
 
@@ -92,14 +120,27 @@ Repository::Transaction *Repository::newTransaction(const QString &branch, const
     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);
+
 #ifndef DRY_RUN
+        fastImport.setProcessChannelMode(QProcess::ForwardedChannels);
         fastImport.start("git-fast-import", QStringList());
 #else
         fastImport.start("/bin/cat", QStringList());
@@ -143,7 +184,6 @@ QIODevice *Repository::Transaction::addFile(const QString &path, int mode, qint6
     repository->fastImport.write("\ndata ");
     repository->fastImport.write(QByteArray::number(length));
     repository->fastImport.write("\n", 1);
-    repository->fastImport.waitForBytesWritten(0);
 #endif
 
     modifiedFiles.insert(path, fp);
@@ -160,7 +200,7 @@ void Repository::Transaction::commit()
 
     {
         QByteArray branchRef = branch;
-        if (!branchRef.startsWith("refs/heads/"))
+        if (!branchRef.startsWith("refs/"))
             branchRef.prepend("refs/heads/");
 
         QTextStream s(&repository->fastImport);
@@ -169,19 +209,24 @@ void Repository::Transaction::commit()
         s << "committer " << 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 << "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();
@@ -197,7 +242,7 @@ 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()));
 }