gitclient.cpp

        QStringList args;
        args << QLatin1String("cmd.exe") << QLatin1String("/c") << m_binaryPath;
        return args;
#else
        return QStringList(m_binaryPath);
#endif
}

QStringList GitClient::processEnvironment() const
{
    ProjectExplorer::Environment environment = ProjectExplorer::Environment::systemEnvironment();
    if (m_settings.adoptPath)
        environment.set(QLatin1String("PATH"), m_settings.path);
    return environment.toStringList();
}

bool GitClient::synchronousGit(const QString &workingDirectory,
                               const QStringList &gitArguments,
                               QByteArray* outputText,
                               QByteArray* errorText,
                               bool logCommandToWindow)
{
    if (Git::Constants::debug)
        qDebug() << "synchronousGit" << workingDirectory << gitArguments;

    if (logCommandToWindow)
        VCSBase::VCSBaseOutputWindow::instance()->appendCommand(formatCommand(m_binaryPath, gitArguments));

    QProcess process;
    process.setWorkingDirectory(workingDirectory);
    process.setEnvironment(processEnvironment());

    QStringList args = binary(); // "cmd /c git" on Windows
    const QString executable = args.front();
    args.pop_front();
    args.append(gitArguments);
    process.start(executable, args);
    process.closeWriteChannel();
    if (!process.waitForStarted()) {
        if (errorText) {
            const QString msg = QString::fromLatin1("Unable to execute '%1': %2:")
                                .arg(binary().join(QString(QLatin1Char(' '))), process.errorString());
            *errorText = msg.toLocal8Bit();
        }
        return false;
    }

    if (!Utils::SynchronousProcess::readDataFromProcess(process, m_settings.timeoutSeconds * 1000,
                                                        outputText, errorText)) {
        *errorText->append(GitCommand::msgTimeout(m_settings.timeoutSeconds).toLocal8Bit());
        Utils::SynchronousProcess::stopProcess(process);
        return false;
    }

    if (Git::Constants::debug)
        qDebug() << "synchronousGit ex=" << process.exitStatus() << process.exitCode();
    return process.exitStatus() == QProcess::NormalExit && process.exitCode() == 0;
}

static inline int
        askWithDetailedText(QWidget *parent,
                            const QString &title, const QString &msg,
                            const QString &inf,
                            QMessageBox::StandardButton defaultButton,
                            QMessageBox::StandardButtons buttons = QMessageBox::Yes|QMessageBox::No)
{
    QMessageBox msgBox(QMessageBox::Question, title, msg, buttons, parent);
    msgBox.setDetailedText(inf);
    msgBox.setDefaultButton(defaultButton);
    return msgBox.exec();
}

// Convenience that pops up an msg box.
GitClient::StashResult GitClient::ensureStash(const QString &workingDirectory)
{
    QString errorMessage;
    const StashResult sr = ensureStash(workingDirectory, &errorMessage);
    if (sr == StashFailed)
        VCSBase::VCSBaseOutputWindow::instance()->appendError(errorMessage);
    return sr;
}

// Ensure that changed files are stashed before a pull or similar
GitClient::StashResult GitClient::ensureStash(const QString &workingDirectory, QString *errorMessage)
{
    QString statusOutput;
    switch (gitStatus(workingDirectory, false, &statusOutput, errorMessage)) {
        case StatusChanged:
        break;
        case StatusUnchanged:
        return StashUnchanged;
        case StatusFailed:
        return StashFailed;
    }

    const int answer = askWithDetailedText(m_core->mainWindow(), tr("Changes"),
                             tr("You have modified files. Would you like to stash your changes?"),
                             statusOutput, QMessageBox::Yes, QMessageBox::Yes|QMessageBox::No|QMessageBox::Cancel);
    switch (answer) {
        case QMessageBox::Cancel:
            return StashCanceled;
        case QMessageBox::Yes:
            if (!executeSynchronousStash(workingDirectory, creatorStashMessage(QLatin1String("push")), errorMessage))
                return StashFailed;
            break;
        case QMessageBox::No: // At your own risk, so.
            return NotStashed;
        }

    return Stashed;
 }

// Trim a git status file spec: "modified:    foo .cpp" -> "modified: foo .cpp"
static inline QString trimFileSpecification(QString fileSpec)
{
    const int colonIndex = fileSpec.indexOf(QLatin1Char(':'));
    if (colonIndex != -1) {
        // Collapse the sequence of spaces
        const int filePos = colonIndex + 2;
        int nonBlankPos = filePos;
        for ( ; fileSpec.at(nonBlankPos).isSpace(); nonBlankPos++) ;
        if (nonBlankPos > filePos)
            fileSpec.remove(filePos, nonBlankPos - filePos);
    }
    return fileSpec;
}

GitClient::StatusResult GitClient::gitStatus(const QString &workingDirectory,
                                             bool untracked,
                                             QString *output,
                                             QString *errorMessage)
{
    // Run 'status'. Note that git returns exitcode 1 if there are no added files.
    QByteArray outputText;
    QByteArray errorText;
    // @TODO: Use "--no-color" once it is supported
    QStringList statusArgs(QLatin1String("status"));
    if (untracked)
        statusArgs << QLatin1String("-u");
    const bool statusRc = synchronousGit(workingDirectory, statusArgs, &outputText, &errorText);
    GitCommand::removeColorCodes(&outputText);
    if (output)
        *output = commandOutputFromLocal8Bit(outputText);
    // Is it something really fatal?
    if (!statusRc && !outputText.contains(kBranchIndicatorC)) {
        if (errorMessage) {
            const QString error = commandOutputFromLocal8Bit(errorText);
            *errorMessage = tr("Unable to obtain the status: %1").arg(error);
        }
        return StatusFailed;
    }
    // Unchanged (output text depending on whether -u was passed)
    if (outputText.contains("nothing to commit")
        || outputText.contains("nothing added to commit but untracked files present"))
        return StatusUnchanged;
    return StatusChanged;
}

bool GitClient::getCommitData(const QString &workingDirectory,
                              QString *commitTemplate,
                              CommitData *d,
                              QString *errorMessage)
{
    if (Git::Constants::debug)
        qDebug() << Q_FUNC_INFO << workingDirectory;

    d->clear();

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

    d->panelInfo.repository = repoDirectory;

    QDir gitDir(repoDirectory);
    if (!gitDir.cd(QLatin1String(kGitDirectoryC))) {
        *errorMessage = tr("The repository %1 is not initialized yet.").arg(repoDirectory);
        return false;
    }

    // Read description
    const QString descriptionFile = gitDir.absoluteFilePath(QLatin1String("description"));
    if (QFileInfo(descriptionFile).isFile()) {
        QFile file(descriptionFile);
        if (file.open(QIODevice::ReadOnly|QIODevice::Text))
            d->panelInfo.description = commandOutputFromLocal8Bit(file.readAll()).trimmed();
    }

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

    //    Output looks like:
    //    # On branch [branchname]
    //    # Changes to be committed:
    //    #   (use "git reset HEAD <file>..." to unstage)
    //    #
    //    #       modified:   somefile.cpp
    //    #       new File:   somenew.h
    //    #
    //    # Changed but not updated:
    //    #   (use "git add <file>..." to update what will be committed)
    //    #
    //    #       modified:   someother.cpp
    //    #
    //    # Untracked files:
    //    #   (use "git add <file>..." to include in what will be committed)
    //    #
    //    #       list of files...

    if (!d->parseFilesFromStatus(output)) {
        *errorMessage = msgParseFilesFailed();
        return false;
    }
    // Filter out untracked files that are not part of the project
    VCSBase::VCSBaseSubmitEditor::filterUntrackedFilesOfProject(repoDirectory, &d->untrackedFiles);
    if (d->filesEmpty()) {
        *errorMessage = msgNoChangedFiles();
        return false;
    }

    d->panelData.author = readConfigValue(workingDirectory, QLatin1String("user.name"));
    d->panelData.email = readConfigValue(workingDirectory, QLatin1String("user.email"));

    // Get the commit template
    QString templateFilename = readConfigValue(workingDirectory, QLatin1String("commit.template"));
    if (!templateFilename.isEmpty()) {
        // Make relative to repository
        const QFileInfo templateFileInfo(templateFilename);
        if (templateFileInfo.isRelative())
            templateFilename = repoDirectory + QLatin1Char('/') + templateFilename;
        QFile templateFile(templateFilename);
        if (templateFile.open(QIODevice::ReadOnly|QIODevice::Text)) {
            *commitTemplate = QString::fromLocal8Bit(templateFile.readAll());
        } else {
            qWarning("Unable to read commit template %s: %s",
                     qPrintable(templateFilename),
                     qPrintable(templateFile.errorString()));
        }
    }
    return true;
}

// addAndCommit:
bool GitClient::addAndCommit(const QString &repositoryDirectory,
                             const GitSubmitEditorPanelData &data,
                             const QString &messageFile,
                             const QStringList &checkedFiles,
                             const QStringList &origCommitFiles,
                             const QStringList &origDeletedFiles)
{
    if (Git::Constants::debug)
        qDebug() << "GitClient::addAndCommit:" << repositoryDirectory << checkedFiles << origCommitFiles;

    // Do we need to reset any files that had been added before
    // (did the user uncheck any previously added files)
    const QSet<QString> resetFiles = origCommitFiles.toSet().subtract(checkedFiles.toSet());
    if (!resetFiles.empty())
        if (!synchronousReset(repositoryDirectory, resetFiles.toList()))
            return false;

    // Re-add all to make sure we have the latest changes, but only add those that aren't marked
    // for deletion
    QStringList addFiles = checkedFiles.toSet().subtract(origDeletedFiles.toSet()).toList();
    if (!addFiles.isEmpty())
        if (!synchronousAdd(repositoryDirectory, false, addFiles))
            return false;

    // Do the final commit
    QStringList args;
    args << QLatin1String("commit")
         << QLatin1String("-F") << QDir::toNativeSeparators(messageFile);

    const QString &authorString =  data.authorString();
    if (!authorString.isEmpty())
         args << QLatin1String("--author") << authorString;

    QByteArray outputText;
    QByteArray errorText;
    const bool rc = synchronousGit(repositoryDirectory, args, &outputText, &errorText);
    if (rc) {
        VCSBase::VCSBaseOutputWindow::instance()->append(tr("Committed %n file(s).\n", 0, checkedFiles.size()));
    } else {
        VCSBase::VCSBaseOutputWindow::instance()->appendError(tr("Unable to commit %n file(s): %1\n", 0, checkedFiles.size()).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)
{
    if (Git::Constants::debug)
        qDebug() << Q_FUNC_INFO << files;

    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, false, &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 QString modifiedState = QLatin1String("modified");
    const QStringList allStagedFiles = data.stagedFileNames(modifiedState);
    const QStringList allUnstagedFiles = data.unstagedFileNames(modifiedState);
    // 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 (Git::Constants::debug)
        qDebug() << Q_FUNC_INFO << data.stagedFiles << data.unstagedFiles << allStagedFiles << allUnstagedFiles << stagedFiles << unstagedFiles;

    if (stagedFiles.empty() && unstagedFiles.empty())
        return RevertUnchanged;

    // Ask to revert (to do: Handle lists with a selection dialog)
    const QMessageBox::StandardButton answer
        = QMessageBox::question(m_core->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 (!stagedFiles.empty() && !synchronousReset(repoDirectory, stagedFiles, errorMessage))
        return RevertFailed;
    // Finally revert!
    if (!synchronousCheckoutFiles(repoDirectory, stagedFiles + unstagedFiles, QString(), errorMessage))
        return RevertFailed;
    return RevertOk;
}

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

void GitClient::pull(const QString &workingDirectory)
{
    GitCommand *cmd = executeGit(workingDirectory, QStringList(QLatin1String("pull")), 0, true, GitCommand::ReportStderr);
    connectRepositoryChanged(workingDirectory, cmd);
}

void GitClient::push(const QString &workingDirectory)
{
    executeGit(workingDirectory, QStringList(QLatin1String("push")), 0, true, GitCommand::ReportStderr);
}

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

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

bool GitClient::synchronousStashRestore(const QString &workingDirectory,
                                        const QString &stash,
                                        const QString &branch /* = QString()*/,
                                        QString *errorMessage)
{
    QStringList arguments(QLatin1String("stash"));
    if (branch.isEmpty()) {
        arguments << QLatin1String("apply") << stash;
    } else {
        arguments << QLatin1String("branch") << branch << stash;
    }
    QByteArray outputText;
    QByteArray errorText;
    const bool rc = synchronousGit(workingDirectory, arguments, &outputText, &errorText);
    if (!rc) {
        const QString stdErr = commandOutputFromLocal8Bit(errorText);
        const QString msg = branch.isEmpty() ?
                            tr("Unable to restore stash %1: %2").arg(workingDirectory, stdErr) :
                            tr("Unable to restore stash %1 to branch %2: %3").arg(workingDirectory, branch, stdErr);
        if (errorMessage) {
            *errorMessage = msg;
        } else {
            VCSBase::VCSBaseOutputWindow::instance()->append(msg);
        }
        return false;
    }
    QString output = commandOutputFromLocal8Bit(outputText);
    if (!output.isEmpty())
        VCSBase::VCSBaseOutputWindow::instance()->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 = synchronousGit(workingDirectory, arguments, &outputText, &errorText);
    if (!rc) {
        const QString stdErr = commandOutputFromLocal8Bit(errorText);
        const QString msg = stash.isEmpty() ?
                            tr("Unable to remove stashes of %1: %2").arg(workingDirectory, stdErr) :
                            tr("Unable to remove stash %1 of %2: %3").arg(stash, workingDirectory, stdErr);
        if (errorMessage) {
            *errorMessage = msg;
        } else {
            VCSBase::VCSBaseOutputWindow::instance()->append(msg);
        }
        return false;
    }
    QString output = commandOutputFromLocal8Bit(outputText);
    if (!output.isEmpty())
        VCSBase::VCSBaseOutputWindow::instance()->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 = synchronousGit(workingDirectory, arguments, &outputText, &errorText);
    if (!rc) {
        const QString msg = tr("Unable retrieve stash list of %1: %2").arg(workingDirectory, commandOutputFromLocal8Bit(errorText));
        if (errorMessage) {
            *errorMessage = msg;
        } else {
            VCSBase::VCSBaseOutputWindow::instance()->append(msg);
        }
        return false;
    }
    Stash stash;
    foreach(const QString &line, commandOutputLinesFromLocal8Bit(outputText))
        if (stash.parseStashLine(line))
            stashes->push_back(stash);
    if (Git::Constants::debug)
        qDebug() << Q_FUNC_INFO << *stashes;
    return true;
}

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

    QByteArray outputText;
    QByteArray errorText;
    if (synchronousGit(workingDirectory, arguments, &outputText, &errorText, false))
        return commandOutputFromLocal8Bit(outputText);
    return QString();
}

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

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

void GitClient::setSettings(const GitSettings &s)
{
    if (s != m_settings) {
        m_settings = s;
        if (QSettings *s = m_core->settings())
            m_settings.toSettings(s);
        m_binaryPath = m_settings.gitBinaryPath();
        m_cachedGitVersion = 0u;
        m_hasCachedGitVersion = false;
    }
}

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

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

QString GitClient::gitVersionString(bool silent, QString *errorMessage)
{
    if (const unsigned version = gitVersion(silent, errorMessage)) {
        QString rc;
        QTextStream(&rc) << (version >> 16) << '.'
                << (0xFF & (version >> 8)) << '.'
                << (version & 0xFF);
        return rc;
    }
    return QString();
}

// determine version as '(major << 16) + (minor << 8) + patch' or 0.
unsigned GitClient::synchronousGitVersion(bool silent, QString *errorMessage /* = 0 */)
{
    // run git --version
    QByteArray outputText;
    QByteArray errorText;
    const bool rc = synchronousGit(QString(), QStringList("--version"), &outputText, &errorText);
    if (!rc) {
        const QString msg = tr("Unable to determine git version: %1").arg(commandOutputFromLocal8Bit(errorText));
        if (errorMessage) {
            *errorMessage = msg;
        } else {
            if (silent) {
                VCSBase::VCSBaseOutputWindow::instance()->append(msg);
            } else {
                VCSBase::VCSBaseOutputWindow::instance()->appendError(msg);
            }
        }
        return 0;
    }
    // cut 'git version 1.6.5.1.sha'
    const QString output = commandOutputFromLocal8Bit(outputText);
    const 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();
    const unsigned minor = versionPattern.cap(2).toUInt();
    const unsigned patch = versionPattern.cap(3).toUInt();
    return version(major, minor, patch);
}

} // namespace Internal
} // namespace Git