gitclient.cpp

            arguments << binary;
            binary = wish;
        }
    }
    VcsBase::VcsBaseOutputWindow *outwin = VcsBase::VcsBaseOutputWindow::instance();
    const QString gitkOpts = settings()->stringValue(GitSettings::gitkOptionsKey);
    if (!gitkOpts.isEmpty())
        arguments.append(Utils::QtcProcess::splitArgs(gitkOpts));
    if (!fileName.isEmpty())
        arguments << QLatin1String("--") << fileName;
    outwin->appendCommand(workingDirectory, binary, arguments);
    // This should always use QProcess::startDetached (as not to kill
    // the child), but that does not have an environment parameter.
    bool success = false;
    if (!settings()->stringValue(GitSettings::pathKey).isEmpty()) {
        QProcess *process = new QProcess(this);
        process->setWorkingDirectory(workingDirectory);
        process->setProcessEnvironment(env);
        process->start(binary, arguments);
        success = process->waitForStarted();
        if (success)
            connect(process, SIGNAL(finished(int)), process, SLOT(deleteLater()));
        else
            delete process;
    } else {
        success = QProcess::startDetached(binary, arguments, workingDirectory);
    }
    if (!success) {
        const QString error = tr("Cannot launch \"%1\".").arg(binary);
        if (silent)
            outwin->appendSilently(error);
        else
            outwin->appendError(error);
    }
    return success;
}

QString GitClient::gitBinaryPath(bool *ok, QString *errorMessage) const
{
    return settings()->gitBinaryPath(ok, errorMessage);
}

bool GitClient::getCommitData(const QString &workingDirectory,
                              bool amend,
                              QString *commitTemplate,
                              CommitData *commitData,
                              QString *errorMessage)
{
    commitData->clear();

    // Find repo
    const QString repoDirectory = GitClient::findRepositoryForDirectory(workingDirectory);
    if (repoDirectory.isEmpty()) {
        *errorMessage = msgRepositoryNotFound(workingDirectory);
        return false;
    }

    commitData->panelInfo.repository = repoDirectory;

    QString gitDir = findGitDirForRepository(repoDirectory);
    if (gitDir.isEmpty()) {
        *errorMessage = tr("The repository \"%1\" is not initialized.").arg(repoDirectory);
        return false;
    }

    // Run status. Note that it has exitcode 1 if there are no added files.
    QString output;
    const StatusResult status = gitStatus(repoDirectory, ShowAll, &output, errorMessage);
    switch (status) {
    case  StatusChanged:
        break;
    case StatusUnchanged:
        if (amend)
            break;
        *errorMessage = msgNoChangedFiles();
        return false;
    case StatusFailed:
        return false;
    }

    //    Output looks like:
    //    ## branch_name
    //    MM filename
    //     A new_unstaged_file
    //    R  old -> new
    //     D deleted_file
    //    ?? untracked_file
    if (status != StatusUnchanged) {
        if (!commitData->parseFilesFromStatus(output)) {
            *errorMessage = msgParseFilesFailed();
            return false;
        }

        // Filter out untracked files that are not part of the project
        QStringList untrackedFiles = commitData->filterFiles(UntrackedFile);

        VcsBase::VcsBaseSubmitEditor::filterUntrackedFilesOfProject(repoDirectory, &untrackedFiles);
        QList<CommitData::StateFilePair> filteredFiles;
        QList<CommitData::StateFilePair>::const_iterator it = commitData->files.constBegin();
        for ( ; it != commitData->files.constEnd(); ++it) {
            if (it->first == UntrackedFile && !untrackedFiles.contains(it->second))
                continue;
            filteredFiles.append(*it);
        }
        commitData->files = filteredFiles;

        if (commitData->files.isEmpty() && !amend) {
            *errorMessage = msgNoChangedFiles();
            return false;
        }
    }

    commitData->commitEncoding = readConfigValue(workingDirectory, QLatin1String("i18n.commitEncoding"));

    // Get the commit template or the last commit message
    if (amend) {
        // Amend: get last commit data as "SHA1<tab>author<tab>email<tab>message".
        QStringList args(QLatin1String("log"));
        args << QLatin1String("--max-count=1") << QLatin1String("--pretty=format:%h\t%an\t%ae\t%B");
        QTextCodec *codec = QTextCodec::codecForName(commitData->commitEncoding.toLocal8Bit());
        const Utils::SynchronousProcessResponse sp = synchronousGit(repoDirectory, args, 0, codec);
        if (sp.result != Utils::SynchronousProcessResponse::Finished) {
            *errorMessage = tr("Cannot retrieve last commit data of repository \"%1\".").arg(repoDirectory);
            return false;
        }
        QStringList values = sp.stdOut.split(QLatin1Char('\t'));
        QTC_ASSERT(values.size() >= 4, return false);
        commitData->amendSHA1 = values.takeFirst();
        commitData->panelData.author = values.takeFirst();
        commitData->panelData.email = values.takeFirst();
        *commitTemplate = values.join(QLatin1String("\t"));
    } else {
        commitData->panelData.author = readConfigValue(workingDirectory, QLatin1String("user.name"));
        commitData->panelData.email = readConfigValue(workingDirectory, QLatin1String("user.email"));
        // Commit: Get the commit template
        QDir gitDirectory(gitDir);
        QString templateFilename = gitDirectory.absoluteFilePath(QLatin1String("MERGE_MSG"));
        if (!QFile::exists(templateFilename))
            templateFilename = gitDirectory.absoluteFilePath(QLatin1String("SQUASH_MSG"));
        if (!QFile::exists(templateFilename))
            templateFilename = readConfigValue(workingDirectory, QLatin1String("commit.template"));
        if (!templateFilename.isEmpty()) {
            // Make relative to repository
            const QFileInfo templateFileInfo(templateFilename);
            if (templateFileInfo.isRelative())
                templateFilename = repoDirectory + QLatin1Char('/') + templateFilename;
            Utils::FileReader reader;
            if (!reader.fetch(templateFilename, QIODevice::Text, errorMessage))
                return false;
            *commitTemplate = QString::fromLocal8Bit(reader.data());
        }
    }
    return true;
}

// Log message for commits/amended commits to go to output window
static inline QString msgCommitted(const QString &amendSHA1, int fileCount)
{
    if (amendSHA1.isEmpty())
        return GitClient::tr("Committed %n file(s).\n", 0, fileCount);
    if (fileCount)
        return GitClient::tr("Amended \"%1\" (%n file(s)).\n", 0, fileCount).arg(amendSHA1);
    return GitClient::tr("Amended \"%1\".").arg(amendSHA1);
}

bool GitClient::addAndCommit(const QString &repositoryDirectory,
                             const GitSubmitEditorPanelData &data,
                             const QString &amendSHA1,
                             const QString &messageFile,
                             VcsBase::SubmitFileModel *model)
{
    const QString renameSeparator = QLatin1String(" -> ");
    const bool amend = !amendSHA1.isEmpty();

    QStringList filesToAdd;
    QStringList filesToRemove;
    QStringList filesToReset;

    int commitCount = 0;

    for (int i = 0; i < model->rowCount(); ++i) {
        const FileStates state = static_cast<FileStates>(model->extraData(i).toInt());
        QString file = model->file(i);
        const bool checked = model->checked(i);

        if (checked)
            ++commitCount;

        if (state == UntrackedFile && checked)
            filesToAdd.append(file);

        if ((state & StagedFile) && !checked) {
            if (state & (ModifiedFile | AddedFile | DeletedFile)) {
                filesToReset.append(file);
            } else if (state & (RenamedFile | CopiedFile)) {
                const QString newFile = file.mid(file.indexOf(renameSeparator) + renameSeparator.count());
                filesToReset.append(newFile);
            }
        } else if (state & UnmergedFile && checked) {
            QTC_ASSERT(false, continue); // There should not be unmerged files when commiting!
        }

        if (state == ModifiedFile && checked) {
            filesToReset.removeAll(file);
            filesToAdd.append(file);
        } else if (state == AddedFile && checked) {
            QTC_ASSERT(false, continue); // these should be untracked!
        } else if (state == DeletedFile && checked) {
            filesToReset.removeAll(file);
            filesToRemove.append(file);
        } else if (state == RenamedFile && checked) {
            QTC_ASSERT(false, continue); // git mv directly stages.
        } else if (state == CopiedFile && checked) {
            QTC_ASSERT(false, continue); // only is noticed after adding a new file to the index
        } else if (state == UnmergedFile && checked) {
            QTC_ASSERT(false, continue); // There should not be unmerged files when commiting!
        }
    }

    if (!filesToReset.isEmpty() && !synchronousReset(repositoryDirectory, filesToReset))
        return false;

    if (!filesToRemove.isEmpty() && !synchronousDelete(repositoryDirectory, true, filesToRemove))
        return false;

    if (!filesToAdd.isEmpty() && !synchronousAdd(repositoryDirectory, false, filesToAdd))
        return false;

    // Do the final commit
    QStringList args;
    args << QLatin1String("commit")
         << QLatin1String("-F") << QDir::toNativeSeparators(messageFile);
    if (amend)
        args << QLatin1String("--amend");
    const QString &authorString =  data.authorString();
    if (!authorString.isEmpty())
         args << QLatin1String("--author") << authorString;
    if (data.bypassHooks)
        args << QLatin1String("--no-verify");

    QByteArray outputText;
    QByteArray errorText;

    const bool rc = fullySynchronousGit(repositoryDirectory, args, &outputText, &errorText);
    if (rc)
        outputWindow()->append(msgCommitted(amendSHA1, commitCount));
    else
        outputWindow()->appendError(tr("Cannot commit %n file(s): %1\n", 0, commitCount).arg(commandOutputFromLocal8Bit(errorText)));

    return rc;
}

/* Revert: This function can be called with a file list (to revert single
 * files)  or a single directory (revert all). Qt Creator currently has only
 * 'revert single' in its VCS menus, but the code is prepared to deal with
 * reverting a directory pending a sophisticated selection dialog in the
 * VcsBase plugin. */
GitClient::RevertResult GitClient::revertI(QStringList files,
                                           bool *ptrToIsDirectory,
                                           QString *errorMessage,
                                           bool revertStaging)
{
    if (files.empty())
        return RevertCanceled;

    // Figure out the working directory
    const QFileInfo firstFile(files.front());
    const bool isDirectory = firstFile.isDir();
    if (ptrToIsDirectory)
        *ptrToIsDirectory = isDirectory;
    const QString workingDirectory = isDirectory ? firstFile.absoluteFilePath() : firstFile.absolutePath();

    const QString repoDirectory = GitClient::findRepositoryForDirectory(workingDirectory);
    if (repoDirectory.isEmpty()) {
        *errorMessage = msgRepositoryNotFound(workingDirectory);
        return RevertFailed;
    }

    // Check for changes
    QString output;
    switch (gitStatus(repoDirectory, StatusMode(NoUntracked | NoSubmodules), &output, errorMessage)) {
    case StatusChanged:
        break;
    case StatusUnchanged:
        return RevertUnchanged;
    case StatusFailed:
        return RevertFailed;
    }
    CommitData data;
    if (!data.parseFilesFromStatus(output)) {
        *errorMessage = msgParseFilesFailed();
        return RevertFailed;
    }

    // If we are looking at files, make them relative to the repository
    // directory to match them in the status output list.
    if (!isDirectory) {
        const QDir repoDir(repoDirectory);
        const QStringList::iterator cend = files.end();
        for (QStringList::iterator it = files.begin(); it != cend; ++it)
            *it = repoDir.relativeFilePath(*it);
    }

    // From the status output, determine all modified [un]staged files.
    const QStringList allStagedFiles = data.filterFiles(StagedFile | ModifiedFile);
    const QStringList allUnstagedFiles = data.filterFiles(ModifiedFile);
    // Unless a directory was passed, filter all modified files for the
    // argument file list.
    QStringList stagedFiles = allStagedFiles;
    QStringList unstagedFiles = allUnstagedFiles;
    if (!isDirectory) {
        const QSet<QString> filesSet = files.toSet();
        stagedFiles = allStagedFiles.toSet().intersect(filesSet).toList();
        unstagedFiles = allUnstagedFiles.toSet().intersect(filesSet).toList();
    }
    if ((!revertStaging || stagedFiles.empty()) && unstagedFiles.empty())
        return RevertUnchanged;

    // Ask to revert (to do: Handle lists with a selection dialog)
    const QMessageBox::StandardButton answer
        = QMessageBox::question(Core::ICore::mainWindow(),
                                tr("Revert"),
                                tr("The file has been changed. Do you want to revert it?"),
                                QMessageBox::Yes|QMessageBox::No,
                                QMessageBox::No);
    if (answer == QMessageBox::No)
        return RevertCanceled;

    // Unstage the staged files
    if (revertStaging && !stagedFiles.empty() && !synchronousReset(repoDirectory, stagedFiles, errorMessage))
        return RevertFailed;
    QStringList filesToRevert = unstagedFiles;
    if (revertStaging)
        filesToRevert += stagedFiles;
    // Finally revert!
    if (!synchronousCheckoutFiles(repoDirectory, filesToRevert, QString(), errorMessage, revertStaging))
        return RevertFailed;
    return RevertOk;
}

void GitClient::revert(const QStringList &files, bool revertStaging)
{
    bool isDirectory;
    QString errorMessage;
    switch (revertI(files, &isDirectory, &errorMessage, revertStaging)) {
    case RevertOk:
        GitPlugin::instance()->gitVersionControl()->emitFilesChanged(files);
        break;
    case RevertCanceled:
        break;
    case RevertUnchanged: {
        const QString msg = (isDirectory || files.size() > 1) ? msgNoChangedFiles() : tr("The file is not modified.");
        outputWindow()->append(msg);
    }
        break;
    case RevertFailed:
        outputWindow()->append(errorMessage);
        break;
    }
}

bool GitClient::synchronousFetch(const QString &workingDirectory, const QString &remote)
{
    QStringList arguments(QLatin1String("fetch"));
    if (!remote.isEmpty())
        arguments << remote;
    // Disable UNIX terminals to suppress SSH prompting.
    const unsigned flags = VcsBase::VcsBasePlugin::SshPasswordPrompt|VcsBase::VcsBasePlugin::ShowStdOutInLogWindow
                           |VcsBase::VcsBasePlugin::ShowSuccessMessage;
    const Utils::SynchronousProcessResponse resp = synchronousGit(workingDirectory, arguments, flags);
    return resp.result == Utils::SynchronousProcessResponse::Finished;
}

bool GitClient::executeAndHandleConflicts(const QString &workingDirectory,
                                          const QStringList &arguments,
                                          const QString &abortCommand)
{
    // Disable UNIX terminals to suppress SSH prompting.
    const unsigned flags = VcsBase::VcsBasePlugin::SshPasswordPrompt|VcsBase::VcsBasePlugin::ShowStdOutInLogWindow;
    const Utils::SynchronousProcessResponse resp = synchronousGit(workingDirectory, arguments, flags);
    ConflictHandler conflictHandler(0, workingDirectory, abortCommand);
    // Notify about changed files or abort the rebase.
    const bool ok = resp.result == Utils::SynchronousProcessResponse::Finished;
    if (ok) {
        GitPlugin::instance()->gitVersionControl()->emitRepositoryChanged(workingDirectory);
    } else {
        conflictHandler.readStdOutString(resp.stdOut);
        conflictHandler.readStdErr(resp.stdErr);
    }
    return ok;
}

bool GitClient::synchronousPull(const QString &workingDirectory, bool rebase)
{
    QString abortCommand;
    QStringList arguments(QLatin1String("pull"));
    if (rebase) {
        arguments << QLatin1String("--rebase");
        abortCommand = QLatin1String("rebase");
    } else {
        abortCommand = QLatin1String("merge");
    }

    bool ok = executeAndHandleConflicts(workingDirectory, arguments, abortCommand);

    if (ok)
        promptSubmoduleUpdate(workingDirectory);

    return ok;
}

void GitClient::synchronousAbortCommand(const QString &workingDir, const QString &abortCommand)
{
    // Abort to clean if something goes wrong
    if (abortCommand.isEmpty()) {
        // no abort command - checkout index to clean working copy.
        synchronousCheckoutFiles(findRepositoryForDirectory(workingDir), QStringList(), QString(), 0, false);
        return;
    }
    VcsBase::VcsBaseOutputWindow *outwin = VcsBase::VcsBaseOutputWindow::instance();
    QStringList arguments;
    arguments << abortCommand << QLatin1String("--abort");
    QByteArray stdOut;
    QByteArray stdErr;
    const bool rc = fullySynchronousGit(workingDir, arguments, &stdOut, &stdErr, true);
    outwin->append(commandOutputFromLocal8Bit(stdOut));
    if (!rc)
        outwin->appendError(commandOutputFromLocal8Bit(stdErr));
}

void GitClient::handleMergeConflicts(const QString &workingDir, const QString &commit, const QString &abortCommand)
{
    QString message = commit.isEmpty() ? tr("Conflicts detected")
                                       : tr("Conflicts detected with commit %1").arg(commit);
    QMessageBox mergeOrAbort(QMessageBox::Question, tr("Conflicts Detected"),
                             message, QMessageBox::Ignore | QMessageBox::Abort);
    QPushButton *mergeToolButton = mergeOrAbort.addButton(tr("Run &Merge Tool"),
                                                          QMessageBox::ActionRole);
    if (abortCommand == QLatin1String("rebase"))
        mergeOrAbort.addButton(tr("&Skip"), QMessageBox::ActionRole);
    switch (mergeOrAbort.exec()) {
    case QMessageBox::Abort:
        synchronousAbortCommand(workingDir, abortCommand);
        break;
    case QMessageBox::Ignore:
        break;
    default: // Merge or Skip
        if (mergeOrAbort.clickedButton() == mergeToolButton) {
            merge(workingDir);
        } else {
            QStringList arguments = QStringList() << abortCommand << QLatin1String("--skip");
            executeAndHandleConflicts(workingDir, arguments, abortCommand);
        }
    }
}

// Subversion: git svn
void GitClient::synchronousSubversionFetch(const QString &workingDirectory)
{
    QStringList args;
    args << QLatin1String("svn") << QLatin1String("fetch");
    // Disable UNIX terminals to suppress SSH prompting.
    const unsigned flags = VcsBase::VcsBasePlugin::SshPasswordPrompt|VcsBase::VcsBasePlugin::ShowStdOutInLogWindow
                           |VcsBase::VcsBasePlugin::ShowSuccessMessage;
    const Utils::SynchronousProcessResponse resp = synchronousGit(workingDirectory, args, flags);
    // Notify about changes.
    if (resp.result == Utils::SynchronousProcessResponse::Finished)
        GitPlugin::instance()->gitVersionControl()->emitRepositoryChanged(workingDirectory);
}

void GitClient::subversionLog(const QString &workingDirectory)
{
    QStringList arguments;
    arguments << QLatin1String("svn") << QLatin1String("log");
    int logCount = settings()->intValue(GitSettings::logCountKey);
    if (logCount > 0)
         arguments << (QLatin1String("--limit=") + QString::number(logCount));

    // Create a command editor, no highlighting or interaction.
    const QString title = tr("Git SVN Log");
    const Core::Id editorId = Git::Constants::C_GIT_COMMAND_LOG_EDITOR;
    const QString sourceFile = VcsBase::VcsBaseEditorWidget::getSource(workingDirectory, QStringList());
    VcsBase::VcsBaseEditorWidget *editor = findExistingVCSEditor("svnLog", sourceFile);
    if (!editor)
        editor = createVcsEditor(editorId, title, sourceFile, CodecNone, "svnLog", sourceFile, 0);
    executeGit(workingDirectory, arguments, editor);
}

bool GitClient::synchronousPush(const QString &workingDirectory, const QStringList &pushArgs)
{
    // Disable UNIX terminals to suppress SSH prompting.
    const unsigned flags = VcsBase::VcsBasePlugin::SshPasswordPrompt|VcsBase::VcsBasePlugin::ShowStdOutInLogWindow
                           |VcsBase::VcsBasePlugin::ShowSuccessMessage;
    QStringList arguments(QLatin1String("push"));
    if (!pushArgs.isEmpty())
        arguments += pushArgs;
    const Utils::SynchronousProcessResponse resp =
            synchronousGit(workingDirectory, arguments, flags);
    return resp.result == Utils::SynchronousProcessResponse::Finished;
}

bool GitClient::synchronousMerge(const QString &workingDirectory, const QString &branch)
{
    QString command = QLatin1String("merge");
    QStringList arguments;

    arguments << command << branch;
    return executeAndHandleConflicts(workingDirectory, arguments, command);
}

bool GitClient::canRebase(const QString &workingDirectory) const
{
    const QString gitDir = findGitDirForRepository(workingDirectory);
    if (QFileInfo(gitDir + QLatin1String("/rebase-apply")).exists()
            || QFileInfo(gitDir + QLatin1String("/rebase-merge")).exists()) {
        VcsBase::VcsBaseOutputWindow::instance()->appendError(
                    tr("Rebase, merge or am is in progress. Please finish "
                       "or abort it then try again"));
        return false;
    }
    return true;
}

bool GitClient::synchronousRebase(const QString &workingDirectory, const QString &baseBranch,
                                  const QString &topicBranch)
{
    QString command = QLatin1String("rebase");
    QStringList arguments;

    arguments << command << baseBranch;
    if (!topicBranch.isEmpty())
        arguments << topicBranch;

    return executeAndHandleConflicts(workingDirectory, arguments, command);
}

bool GitClient::synchronousRevert(const QString &workingDirectory, const QString &commit)
{
    QStringList arguments;
    QString command = QLatin1String("revert");
    arguments << command << QLatin1String("--no-edit") << commit;

    return executeAndHandleConflicts(workingDirectory, arguments, command);
}

bool GitClient::synchronousCherryPick(const QString &workingDirectory, const QString &commit)
{
    QStringList arguments;
    QString command = QLatin1String("cherry-pick");
    arguments << command << commit;

    return executeAndHandleConflicts(workingDirectory, arguments, command);
}

void GitClient::interactiveRebase(const QString &workingDirectory, const QString &commit)
{
    QStringList arguments;
    arguments << QLatin1String("rebase") << QLatin1String("-i") << commit;
    outputWindow()->appendCommand(workingDirectory, settings()->stringValue(GitSettings::binaryPathKey), arguments);
    VcsBase::Command *command = createCommand(workingDirectory, 0, true);
    command->addJob(arguments, -1);
    command->execute();
    command->setCookie(workingDirectory);
    RebaseManager *rebaseManager = new RebaseManager(command);
    connect(command, SIGNAL(errorText(QString)), rebaseManager, SLOT(readStdErr(QString)));
    connect(command, SIGNAL(finished(bool,int,QVariant)),
            rebaseManager, SLOT(finished(bool,int,QVariant)));
}

QString GitClient::msgNoChangedFiles()
{
    return tr("There are no modified files.");
}

void GitClient::stashPop(const QString &workingDirectory, const QString &stash)
{
    QStringList arguments(QLatin1String("stash"));
    arguments << QLatin1String("pop");
    if (!stash.isEmpty())
        arguments << stash;
    VcsBase::Command *cmd = executeGit(workingDirectory, arguments, 0, true);
    connectRepositoryChanged(workingDirectory, cmd);
}

void GitClient::stashPop(const QString &workingDirectory)
{
    stashPop(workingDirectory, QString());
}

bool GitClient::synchronousStashRestore(const QString &workingDirectory,
                                        const QString &stash,
                                        bool pop,
                                        const QString &branch /* = QString()*/,
                                        QString *errorMessage)
{
    QStringList arguments(QLatin1String("stash"));
    if (branch.isEmpty())
        arguments << QLatin1String(pop ? "pop" : "apply") << stash;
    else
        arguments << QLatin1String("branch") << branch << stash;
    QByteArray outputText;
    QByteArray errorText;
    const bool rc = fullySynchronousGit(workingDirectory, arguments, &outputText, &errorText);
    if (!rc) {
        const QString stdErr = commandOutputFromLocal8Bit(errorText);
        const QString nativeWorkingDir = QDir::toNativeSeparators(workingDirectory);
        const QString msg = branch.isEmpty() ?
                            tr("Cannot restore stash \"%1\": %2").
                            arg(nativeWorkingDir, stdErr) :
                            tr("Cannot restore stash \"%1\" to branch \"%2\": %3").
                            arg(nativeWorkingDir, branch, stdErr);
        if (errorMessage)
            *errorMessage = msg;
        else
            outputWindow()->append(msg);
        return false;
    }
    QString output = commandOutputFromLocal8Bit(outputText);
    if (!output.isEmpty())
        outputWindow()->append(output);
    GitPlugin::instance()->gitVersionControl()->emitRepositoryChanged(workingDirectory);
    return true;
}

bool GitClient::synchronousStashRemove(const QString &workingDirectory,
                            const QString &stash /* = QString() */,
                            QString *errorMessage /* = 0 */)
{
    QStringList arguments(QLatin1String("stash"));
    if (stash.isEmpty())
        arguments << QLatin1String("clear");
    else
        arguments << QLatin1String("drop") << stash;
    QByteArray outputText;
    QByteArray errorText;
    const bool rc = fullySynchronousGit(workingDirectory, arguments, &outputText, &errorText);
    if (!rc) {
        const QString stdErr = commandOutputFromLocal8Bit(errorText);
        const QString nativeWorkingDir = QDir::toNativeSeparators(workingDirectory);
        const QString msg = stash.isEmpty() ?
                            tr("Cannot remove stashes of \"%1\": %2").
                            arg(nativeWorkingDir, stdErr) :
                            tr("Cannot remove stash \"%1\" of \"%2\": %3").
                            arg(stash, nativeWorkingDir, stdErr);
        if (errorMessage)
            *errorMessage = msg;
        else
            outputWindow()->append(msg);
        return false;
    }
    QString output = commandOutputFromLocal8Bit(outputText);
    if (!output.isEmpty())
        outputWindow()->append(output);
    return true;
}

void GitClient::branchList(const QString &workingDirectory)
{
    QStringList arguments(QLatin1String("branch"));
    arguments << QLatin1String("-r") << QLatin1String(noColorOption);
    executeGit(workingDirectory, arguments, 0, true);
}

void GitClient::stashList(const QString &workingDirectory)
{
    QStringList arguments(QLatin1String("stash"));
    arguments << QLatin1String("list") << QLatin1String(noColorOption);
    executeGit(workingDirectory, arguments, 0, true);
}

bool GitClient::synchronousStashList(const QString &workingDirectory,
                                     QList<Stash> *stashes,
                                     QString *errorMessage /* = 0 */)
{
    stashes->clear();
    QStringList arguments(QLatin1String("stash"));
    arguments << QLatin1String("list") << QLatin1String(noColorOption);
    QByteArray outputText;
    QByteArray errorText;
    const bool rc = fullySynchronousGit(workingDirectory, arguments, &outputText, &errorText);
    if (!rc) {
        const QString msg = tr("Cannot retrieve stash list of \"%1\": %2").
                            arg(QDir::toNativeSeparators(workingDirectory),
                                commandOutputFromLocal8Bit(errorText));
        if (errorMessage)
            *errorMessage = msg;
        else
            outputWindow()->append(msg);
        return false;
    }
    Stash stash;
    foreach (const QString &line, commandOutputLinesFromLocal8Bit(outputText))
        if (stash.parseStashLine(line))
            stashes->push_back(stash);
    return true;
}

QString GitClient::readConfig(const QString &workingDirectory, const QStringList &configVar) const
{
    QStringList arguments;
    arguments << QLatin1String("config") << configVar;

    QByteArray outputText;
    QByteArray errorText;
    if (!fullySynchronousGit(workingDirectory, arguments, &outputText, &errorText, false))
        return QString();
    if (Utils::HostOsInfo::isWindowsHost())
        return QString::fromUtf8(outputText).remove(QLatin1Char('\r'));
    return commandOutputFromLocal8Bit(outputText);
}

// Read a single-line config value, return trimmed
QString GitClient::readConfigValue(const QString &workingDirectory, const QString &configVar) const
{
    return readConfig(workingDirectory, QStringList(configVar)).remove(QLatin1Char('\n'));
}

bool GitClient::cloneRepository(const QString &directory,const QByteArray &url)
{
    QDir workingDirectory(directory);
    const unsigned flags = VcsBase::VcsBasePlugin::SshPasswordPrompt |
            VcsBase::VcsBasePlugin::ShowStdOutInLogWindow|
            VcsBase::VcsBasePlugin::ShowSuccessMessage;

    if (workingDirectory.exists()) {
        if (!synchronousInit(workingDirectory.path()))
            return false;

        QStringList arguments(QLatin1String("remote"));
        arguments << QLatin1String("add") << QLatin1String("origin") << QLatin1String(url);
        if (!fullySynchronousGit(workingDirectory.path(), arguments, 0, 0, true))
            return false;

        arguments.clear();
        arguments << QLatin1String("fetch");
        const Utils::SynchronousProcessResponse resp =
                synchronousGit(workingDirectory.path(), arguments, flags);
        if (resp.result != Utils::SynchronousProcessResponse::Finished)
            return false;

        arguments.clear();
        arguments << QLatin1String("config")
                  << QLatin1String("branch.master.remote")
                  <<  QLatin1String("origin");
        if (!fullySynchronousGit(workingDirectory.path(), arguments, 0, 0, true))
            return false;

        arguments.clear();
        arguments << QLatin1String("config")
                  << QLatin1String("branch.master.merge")
                  << QLatin1String("refs/heads/master");
        if (!fullySynchronousGit(workingDirectory.path(), arguments, 0, 0, true))
            return false;

        return true;
    } else {
        QStringList arguments(QLatin1String("clone"));
        arguments << QLatin1String(url) << workingDirectory.dirName();
        workingDirectory.cdUp();
        const Utils::SynchronousProcessResponse resp =
                synchronousGit(workingDirectory.path(), arguments, flags);
        // TODO: Turn this into a VcsBaseClient and use resetCachedVcsInfo(...)
        Core::ICore::vcsManager()->resetVersionControlForDirectory(workingDirectory.absolutePath());
        return (resp.result == Utils::SynchronousProcessResponse::Finished);
    }
}

QString GitClient::vcsGetRepositoryURL(const QString &directory)
{
    QStringList arguments(QLatin1String("config"));
    QByteArray outputText;

    arguments << QLatin1String("remote.origin.url");

    if (fullySynchronousGit(directory, arguments, &outputText, 0, false))
        return commandOutputFromLocal8Bit(outputText);
    return QString();
}

GitSettings *GitClient::settings() const
{
    return m_settings;
}

void GitClient::connectRepositoryChanged(const QString & repository, VcsBase::Command *cmd)
{
    // Bind command success termination with repository to changed signal
    if (!m_repositoryChangedSignalMapper) {
        m_repositoryChangedSignalMapper = new QSignalMapper(this);
        connect(m_repositoryChangedSignalMapper, SIGNAL(mapped(QString)),
                GitPlugin::instance()->gitVersionControl(), SIGNAL(repositoryChanged(QString)));
    }
    m_repositoryChangedSignalMapper->setMapping(cmd, repository);
    connect(cmd, SIGNAL(success(QVariant)), m_repositoryChangedSignalMapper, SLOT(map()),
            Qt::QueuedConnection);
}

// determine version as '(major << 16) + (minor << 8) + patch' or 0.
unsigned GitClient::gitVersion(QString *errorMessage) const
{
    const QString newGitBinary = gitBinaryPath();
    if (m_gitVersionForBinary != newGitBinary && !newGitBinary.isEmpty()) {
        // Do not execute repeatedly if that fails (due to git
        // not being installed) until settings are changed.
        m_cachedGitVersion = synchronousGitVersion(errorMessage);
        m_gitVersionForBinary = newGitBinary;
    }
    return m_cachedGitVersion;
}

// determine version as '(major << 16) + (minor << 8) + patch' or 0.
unsigned GitClient::synchronousGitVersion(QString *errorMessage) const
{
    if (gitBinaryPath().isEmpty())
        return 0;

    // run git --version
    QByteArray outputText;
    QByteArray errorText;
    const bool rc = fullySynchronousGit(QString(), QStringList(QLatin1String("--version")), &outputText, &errorText, false);
    if (!rc) {
        const QString msg = tr("Cannot determine git version: %1").arg(commandOutputFromLocal8Bit(errorText));
        if (errorMessage)
            *errorMessage = msg;
        else
            outputWindow()->append(msg);
        return 0;
    }
    // cut 'git version 1.6.5.1.sha'
    const QString output = commandOutputFromLocal8Bit(outputText);
    QRegExp versionPattern(QLatin1String("^[^\\d]+(\\d+)\\.(\\d+)\\.(\\d+).*$"));
    QTC_ASSERT(versionPattern.isValid(), return 0);
    QTC_ASSERT(versionPattern.exactMatch(output), return 0);
    const unsigned major = versionPattern.cap(1).toUInt(0, 16);
    const unsigned minor = versionPattern.cap(2).toUInt(0, 16);
    const unsigned patch = versionPattern.cap(3).toUInt(0, 16);
    return version(major, minor, patch);
}

GitClient::StashGuard::StashGuard(const QString &workingDirectory, const QString &keyword,
                                  StashFlag flag) :
    pop(true),
    workingDir(workingDirectory),
    flags(flag)
{
    client = GitPlugin::instance()->gitClient();
    QString errorMessage;
    if (flags & NoPrompt)
        executeStash(keyword, &errorMessage);
    else
        stashPrompt(keyword, &errorMessage);

    if (stashResult == StashFailed)
        VcsBase::VcsBaseOutputWindow::instance()->appendError(errorMessage);
}

GitClient::StashGuard::~StashGuard()
{
    if (pop && stashResult == Stashed) {
        QString stashName;
        if (client->stashNameFromMessage(workingDir, message, &stashName))
            client->stashPop(workingDir, stashName);
    }
}

void GitClient::StashGuard::stashPrompt(const QString &keyword, QString *errorMessage)
{
    QString statusOutput;
    switch (client->gitStatus(workingDir, StatusMode(NoUntracked | NoSubmodules),
                              &statusOutput, errorMessage)) {
    case GitClient::StatusChanged:
        break;
    case GitClient::StatusUnchanged:
        stashResult = StashUnchanged;
        return;
    case GitClient::StatusFailed:
        stashResult = StashFailed;
        return;
    }

    QPointer<QMessageBox> msgBox = new QMessageBox(QMessageBox::Question,
                                   tr("Uncommitted Changes Found"),
                                   tr("What would you like to do with local changes in:")
                                        + QLatin1String("\n\n\"") + workingDir + QLatin1Char('\"'),
                                   QMessageBox::NoButton, Core::ICore::mainWindow());

    msgBox->setDetailedText(statusOutput);

    QPushButton *stashButton = msgBox->addButton(tr("Stash"), QMessageBox::AcceptRole);
    stashButton->setToolTip(tr("Stash local changes and continue."));

    QPushButton *discardButton = msgBox->addButton(tr("Discard"), QMessageBox::AcceptRole);
    discardButton->setToolTip(tr("Discard (reset) local changes and continue."));

    QPushButton *ignoreButton = 0;
    if (flags & AllowUnstashed) {
        ignoreButton = msgBox->addButton(QMessageBox::Ignore);
        ignoreButton->setToolTip(tr("Continue with local changes in working directory."));
    }

    QPushButton *cancelButton = msgBox->addButton(QMessageBox::Cancel);
    cancelButton->setToolTip(tr("Cancel current command."));

    msgBox->exec();

    if (msgBox.isNull())
        return;

    if (msgBox->clickedButton() == discardButton) {
        if (!client->synchronousReset(workingDir, QStringList(), errorMessage))
            stashResult = StashFailed;
        else
            stashResult = StashUnchanged;
    } else if (msgBox->clickedButton() == ignoreButton) { // At your own risk, so.
        stashResult = NotStashed;
    } else if (msgBox->clickedButton() == cancelButton) {
        stashResult = StashCanceled;
    } else if (msgBox->clickedButton() == stashButton) {
        executeStash(keyword, errorMessage);
    }
}

void GitClient::StashGuard::executeStash(const QString &keyword, QString *errorMessage)
{
    message = creatorStashMessage(keyword);
    if (!client->executeSynchronousStash(workingDir, message, errorMessage))
        stashResult = StashFailed;
    else
        stashResult = Stashed;
 }

void GitClient::StashGuard::preventPop()
{
    pop = false;
}

bool GitClient::StashGuard::stashingFailed() const
{
    switch (stashResult) {
    case StashCanceled:
    case StashFailed:
        return true;
    case NotStashed:
        return !(flags & AllowUnstashed);
    default:
        return false;
    }
}

} // namespace Internal
} // namespace Git

#include "gitclient.moc"