gitclient.cpp

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**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
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#include "gitclient.h"
#include "gitutils.h"

#include "commitdata.h"
#include "gitconstants.h"
#include "gitplugin.h"
#include "gitsubmiteditor.h"
#include "gitversioncontrol.h"
#include "mergetool.h"
#include "branchadddialog.h"
#include "gerrit/gerritplugin.h"

#include <vcsbase/submitfilemodel.h>

#include <coreplugin/editormanager/editormanager.h>
#include <coreplugin/icore.h>
#include <coreplugin/vcsmanager.h>
#include <coreplugin/id.h>
#include <coreplugin/iversioncontrol.h>
#include <coreplugin/coreconstants.h>

#include <utils/hostosinfo.h>
#include <utils/qtcassert.h>
#include <utils/qtcprocess.h>
#include <utils/synchronousprocess.h>
#include <utils/fileutils.h>
#include <vcsbase/command.h>
#include <vcsbase/vcsbaseeditor.h>
#include <vcsbase/vcsbaseeditorparameterwidget.h>
#include <vcsbase/vcsbaseoutputwindow.h>
#include <vcsbase/vcsbaseplugin.h>

#include <diffeditor/diffeditorconstants.h>
#include <diffeditor/diffeditorcontroller.h>
#include <diffeditor/diffeditordocument.h>
#include <diffeditor/diffeditormanager.h>

#include <QCoreApplication>
#include <QDir>
#include <QFileInfo>
#include <QHash>
#include <QRegExp>
#include <QSignalMapper>
#include <QTime>

#include <QMessageBox>
#include <QPushButton>
#include <QToolButton>
#include <QTextCodec>

static const char GIT_DIRECTORY[] = ".git";
static const char graphLogFormatC[] = "%h %d %an %s %ci";
static const char HEAD[] = "HEAD";
static const char noColorOption[] = "--no-color";
static const char decorateOption[] = "--decorate";

namespace Git {
namespace Internal {

// Suppress git diff warnings about "LF will be replaced by CRLF..." on Windows.
static inline unsigned diffExecutionFlags()
{
    return Utils::HostOsInfo::isWindowsHost() ? unsigned(VcsBase::VcsBasePlugin::SuppressStdErrInLogWindow) : 0u;
}

using VcsBase::VcsBasePlugin;

class GitDiffSwitcher : public QObject
{
    Q_OBJECT

public:
    enum DiffType {
        DiffRepository,
        DiffFile,
        DiffFileList,
        DiffProjectList,
        DiffBranch,
        DiffShow
    };

    GitDiffSwitcher(Core::IDocument *parentDocument, GitClient *gitClient);

    void setWorkingDirectory(const QString &workingDir) { m_workingDirectory = workingDir; }
    void setDiffType(DiffType type) { m_diffType = type; }
    void setFileName(const QString &fileName) { m_fileName = fileName; }
    void setFileList(const QStringList &stagedFiles, const QStringList &unstagedFiles)
    {
        m_stagedFiles = stagedFiles;
        m_unstagedFiles = unstagedFiles;
    }
    void setProjectList(const QStringList &projectFiles) { m_projectFiles = projectFiles; }
    void setBranchName(const QString &branchName) { m_branchName = branchName; }
    void setId(const QString &id) { m_id = id; }
    void setDisplayName(const QString &displayName) { m_displayName = displayName; }
    void setBaseArguments(const QStringList &args) { m_baseArguments = args; }

private slots:
    void slotEditorOpened(Core::IEditor *editor);
    void slotEditorClosed(Core::IEditor *editor);
    void execute(QObject *editor);

private:
    void attachAction(Core::IEditor *editor);
    QString actionText();

    Core::IDocument *m_document;
    GitClient *m_gitClient;
    QString m_workingDirectory;
    DiffType m_diffType;
    bool m_usingDiffEditor;
    QString m_fileName;
    QStringList m_stagedFiles;
    QStringList m_unstagedFiles;
    QStringList m_projectFiles;
    QString m_branchName;
    QString m_id;
    QString m_displayName;
    QStringList m_baseArguments;

    QSignalMapper *m_signalMapper;
    QMap<QObject *, bool> m_editorToUsingSideBySideDiffEditor;
};

GitDiffSwitcher::GitDiffSwitcher(Core::IDocument *parentDocument, GitClient *gitClient)
    : QObject(parentDocument),
      m_document(parentDocument),
      m_gitClient(gitClient),
      m_signalMapper(new QSignalMapper(this))
{
    Core::DocumentModel *documentModel = Core::EditorManager::documentModel();
    QList<Core::IEditor *> editors = documentModel->editorsForDocument(m_document);
    for (int i = 0; i < editors.count(); i++)
        attachAction(editors.at(i));

    // must be queued connection because execute() removes the editor & tool bar that the action was added to
    connect(m_signalMapper, SIGNAL(mapped(QObject*)), this, SLOT(execute(QObject*)), Qt::QueuedConnection);
    connect(Core::EditorManager::instance(), SIGNAL(editorOpened(Core::IEditor*)),
            this, SLOT(slotEditorOpened(Core::IEditor*)));
    connect(Core::EditorManager::instance(), SIGNAL(editorAboutToClose(Core::IEditor*)),
            this, SLOT(slotEditorClosed(Core::IEditor*)));
}

void GitDiffSwitcher::attachAction(Core::IEditor *editor)
{
    if (m_editorToUsingSideBySideDiffEditor.contains(editor))
        return;

    const bool usingSideBySideDiffEditor = m_gitClient->settings()->boolValue(GitSettings::useDiffEditorKey);
    QIcon actionIcon = usingSideBySideDiffEditor
            ? QIcon(QLatin1String(Core::Constants::ICON_TEXT_DIFF))
            : QIcon(QLatin1String(Core::Constants::ICON_SIDE_BY_SIDE_DIFF));

    const QString actionToolTip = usingSideBySideDiffEditor
            ? tr("Switch to Text Diff Editor")
            : tr("Switch to Side By Side Diff Editor");

    QAction *switchAction = new QAction(actionIcon, actionToolTip, editor);
    editor->toolBar()->addAction(switchAction);
    connect(switchAction, SIGNAL(triggered()),
            m_signalMapper, SLOT(map()));
    m_signalMapper->setMapping(switchAction, editor);

    m_editorToUsingSideBySideDiffEditor.insert(editor, usingSideBySideDiffEditor);
}

void GitDiffSwitcher::slotEditorOpened(Core::IEditor *editor)
{
    Core::IDocument *document = editor->document();
    if (document != m_document)
        return;

    attachAction(editor);
}

void GitDiffSwitcher::slotEditorClosed(Core::IEditor *editor)
{
    Core::IDocument *document = editor->document();
    if (document != m_document)
        return;

    m_editorToUsingSideBySideDiffEditor.remove(editor);
}

void GitDiffSwitcher::execute(QObject *editor)
{
    bool usingSideBySideEditor = !m_editorToUsingSideBySideDiffEditor.value(editor);
    m_editorToUsingSideBySideDiffEditor[editor] = usingSideBySideEditor;
    m_gitClient->settings()->setValue(GitSettings::useDiffEditorKey, usingSideBySideEditor);

    Core::IEditor *ieditor = qobject_cast<Core::IEditor*>(editor);
    Core::EditorManager::activateEditor(ieditor);

    switch (m_diffType) {
    case DiffRepository:
        m_gitClient->diff(m_workingDirectory, QStringList(), QStringList());
        break;
    case DiffFile:
        m_gitClient->diff(m_workingDirectory, m_fileName);
        break;
    case DiffFileList:
        m_gitClient->diff(m_workingDirectory, m_unstagedFiles, m_stagedFiles);
        break;
    case DiffProjectList:
        m_gitClient->diff(m_workingDirectory, m_projectFiles, QStringList());
        break;
    case DiffBranch:
        m_gitClient->diffBranch(m_workingDirectory, m_baseArguments, m_branchName);
        break;
    case DiffShow:
        m_gitClient->show(m_fileName, m_id, m_baseArguments, m_displayName);
        break;
    default:
        break;
    }

    Core::EditorManager::closeEditor(ieditor, false);
}

class GitDiffHandler : public QObject
{
    Q_OBJECT

public:
    enum RevisionType {
        WorkingTree,
        Index,
        Other
    };

    struct Revision {
        Revision() : type(WorkingTree) { }
        Revision(RevisionType t) : type(t) { }
        Revision(RevisionType t, const QString &i) : type(t), id(i) { }
        RevisionType type;
        QString id; // can be sha or HEAD
        QString infoText() const
        {
            switch (type) {
            case WorkingTree: return tr("Working tree");
            case Index:       return tr("Index");
            default:          return id;
            }
        }
    };

    GitDiffHandler(DiffEditor::DiffEditorController *editorController,
                   const QString &gitPath,
                   const QString &workingDirectory,
                   const QProcessEnvironment &environment,
                   int timeout);

    // index -> working tree
    void diffFile(const QString &fileName);
    // stagedFileNames:   HEAD -> index
    // unstagedFileNames: index -> working tree
    void diffFiles(const QStringList &stagedFileNames, const QStringList &unstagedFileNames);
    // index -> working tree
    void diffProjects(const QStringList &projectPaths);
    // index -> working tree
    void diffRepository();
    // branch HEAD -> working tree
    void diffBranch(const QString &branchName);
    // id^ -> id
    void show(const QString &id);

private slots:
    void slotShowDescriptionReceived(const QString &data);
    void slotFileListReceived(const QString &fileList);
    void slotFileContentsReceived(const QString &contents);

private:
    void collectShowDescription(const QString &id);
    void collectFilesList(const QStringList &additionalArguments);
    void prepareForCollection();
    void collectFilesContents();
    void feedEditor();
    QString workingTreeContents(const QString &fileName) const;

    QPointer<DiffEditor::DiffEditorController> m_editorController;
    const QString m_gitPath;
    const QString m_workingDirectory;
    const QProcessEnvironment m_processEnvironment;
    const int m_timeout;
    const QString m_waitMessage;

    struct RevisionRange {
        RevisionRange() { }
        RevisionRange(const Revision &b, const Revision &e) : begin(b), end(e) { }
        Revision begin;
        Revision end;
    };

    // filename, revision range
    QMap<QString, QList<RevisionRange> > m_requestedRevisionRanges;
    // filename, revision, dummy
    QMap<QString, QMap<Revision, bool> > m_pendingRevisions;
    // filename, revision, contents
    QMap<QString, QMap<Revision, QString> > m_collectedRevisions;

    RevisionRange m_requestedRevisionRange;
};

inline bool operator<(const GitDiffHandler::Revision &rev1, const GitDiffHandler::Revision &rev2)
{
    if (rev1.type != rev2.type)
        return rev1.type < rev2.type;
    return rev1.id < rev2.id;
}

GitDiffHandler::GitDiffHandler(DiffEditor::DiffEditorController *editorController,
               const QString &gitPath,
               const QString &workingDirectory,
               const QProcessEnvironment &environment,
               int timeout)
    : m_editorController(editorController),
      m_gitPath(gitPath),
      m_workingDirectory(workingDirectory),
      m_processEnvironment(environment),
      m_timeout(timeout),
      m_waitMessage(tr("Waiting for data..."))
{
}

void GitDiffHandler::diffFile(const QString &fileName)
{
    m_requestedRevisionRange = RevisionRange(
                Revision(Index),
                Revision(WorkingTree));

    collectFilesList(QStringList() << QLatin1String("--") << fileName);
}

void GitDiffHandler::diffFiles(const QStringList &stagedFileNames, const QStringList &unstagedFileNames)
{
    RevisionRange stagedRange = RevisionRange(
                Revision(Other, QLatin1String(HEAD)),
                Revision(Index));
    RevisionRange unstagedRange = RevisionRange(
                Revision(Index),
                Revision(WorkingTree));

    for (int i = 0; i < stagedFileNames.count(); i++)
        m_requestedRevisionRanges[stagedFileNames.at(i)].append(stagedRange);

    for (int i = 0; i < unstagedFileNames.count(); i++)
        m_requestedRevisionRanges[unstagedFileNames.at(i)].append(unstagedRange);

    prepareForCollection();
    collectFilesContents();
}

void GitDiffHandler::diffProjects(const QStringList &projectPaths)
{
    m_requestedRevisionRange = RevisionRange(
                Revision(Index),
                Revision(WorkingTree));

    collectFilesList(QStringList() << QLatin1String("--") << projectPaths);
}

void GitDiffHandler::diffRepository()
{
    m_requestedRevisionRange = RevisionRange(
                Revision(Index),
                Revision(WorkingTree));

    collectFilesList(QStringList());
}

void GitDiffHandler::diffBranch(const QString &branchName)
{
    m_requestedRevisionRange = RevisionRange(
                Revision(Other, branchName),
                Revision(WorkingTree));

    collectFilesList(QStringList() << branchName);
}

void GitDiffHandler::show(const QString &id)
{
    Revision begin(Other, id + QLatin1Char('^'));
    Revision end(Other, id);
    m_requestedRevisionRange = RevisionRange(begin, end);

    collectShowDescription(id);
}

void GitDiffHandler::collectShowDescription(const QString &id)
{
    if (m_editorController.isNull()) {
        deleteLater();
        return;
    }

    m_editorController->clear(m_waitMessage);
    VcsBase::Command *command = new VcsBase::Command(m_gitPath, m_workingDirectory, m_processEnvironment);
    command->setCodec(GitPlugin::instance()->gitClient()->encoding(m_workingDirectory,
                                                                   "i18n.commitEncoding"));
    connect(command, SIGNAL(output(QString)), this, SLOT(slotShowDescriptionReceived(QString)));
    QStringList arguments;
    arguments << QLatin1String("show") << QLatin1String("-s")
              << QLatin1String(noColorOption) << QLatin1String(decorateOption) << id;
    command->addJob(arguments, m_timeout);
    command->execute();
}

void GitDiffHandler::slotShowDescriptionReceived(const QString &description)
{
    if (m_editorController.isNull()) {
        deleteLater();
        return;
    }

    m_editorController->setDescription(GitPlugin::instance()->gitClient()->
                                           extendedShowDescription(m_workingDirectory, description));

    collectFilesList(QStringList()
                     << m_requestedRevisionRange.begin.id
                     << m_requestedRevisionRange.end.id);
}

void GitDiffHandler::collectFilesList(const QStringList &additionalArguments)
{
    if (m_editorController.isNull()) {
        deleteLater();
        return;
    }

    m_editorController->clear(m_waitMessage);
    VcsBase::Command *command = new VcsBase::Command(m_gitPath, m_workingDirectory, m_processEnvironment);
    command->setCodec(Core::EditorManager::defaultTextCodec());
    connect(command, SIGNAL(output(QString)), this, SLOT(slotFileListReceived(QString)));
    QStringList arguments;
    arguments << QLatin1String("diff") << QLatin1String("--name-only") << additionalArguments;
    command->addJob(arguments, m_timeout);
    command->addFlags(diffExecutionFlags());
    command->execute();
}

void GitDiffHandler::slotFileListReceived(const QString &fileList)
{
    if (m_editorController.isNull()) {
        deleteLater();
        return;
    }

    QStringList fileNames = fileList.split(QLatin1Char('\n'), QString::SkipEmptyParts);
    fileNames.removeDuplicates();

    for (int i = 0; i < fileNames.count(); i++)
        m_requestedRevisionRanges[fileNames.at(i)].append(m_requestedRevisionRange);

    prepareForCollection();
    collectFilesContents();
}

void GitDiffHandler::prepareForCollection()
{
    QMap<QString, QList<RevisionRange> >::const_iterator it
            = m_requestedRevisionRanges.constBegin();
    QMap<QString, QList<RevisionRange> >::const_iterator itEnd
            = m_requestedRevisionRanges.constEnd();
    while (it != itEnd) {
        const QString fileName = it.key();
        const QList<RevisionRange> &ranges = it.value();
        for (int i = 0; i < ranges.count(); i++) {
            const RevisionRange &range = ranges.at(i);
            m_pendingRevisions[fileName][range.begin] = false;
            m_pendingRevisions[fileName][range.end] = false;
        }

        ++it;
    }
}

void GitDiffHandler::collectFilesContents()
{
    QMap<QString, QMap<Revision, bool> >::iterator itFile
            = m_pendingRevisions.begin();
    QMap<QString, QMap<Revision, bool> >::iterator itFileEnd
            = m_pendingRevisions.end();
    while (itFile != itFileEnd) {
        const QString fileName = itFile.key();
        QMap<Revision, bool> &revisions = itFile.value();
        QMap<Revision, bool>::iterator itRev
                = revisions.begin();
        QMap<Revision, bool>::iterator itRevEnd
                = revisions.end();
        while (itRev != itRevEnd) {
            const Revision revision = itRev.key();
            if (revision.type == WorkingTree) {
                // collect file here

                m_collectedRevisions[fileName][revision] = workingTreeContents(fileName);

                itRev = revisions.erase(itRev); // iterate to the next revision
            } else {
                // prepare job here

                VcsBase::Command *command = new VcsBase::Command(m_gitPath, m_workingDirectory, m_processEnvironment);
                command->setCodec(Core::EditorManager::defaultTextCodec());
                connect(command, SIGNAL(output(QString)), this, SLOT(slotFileContentsReceived(QString)));

                QString revisionArgument = (revision.type == Other)
                        ? revision.id : QString();
                revisionArgument += QLatin1Char(':');
                QStringList arguments;
                arguments << QLatin1String("show") << revisionArgument + fileName;
                command->addJob(arguments, m_timeout);
                command->execute();

                return;
            }
        }

        itFile = m_pendingRevisions.erase(itFile); // iterate to the next file
    }

    feedEditor();
}

void GitDiffHandler::slotFileContentsReceived(const QString &contents)
{
    if (m_editorController.isNull()) {
        deleteLater();
        return;
    }

    QMap<QString, QMap<Revision, bool> >::iterator itFile
            = m_pendingRevisions.begin();
    QMap<QString, QMap<Revision, bool> >::iterator itFileEnd
            = m_pendingRevisions.end();
    if (itFile != itFileEnd) {
        const QString fileName = itFile.key();
        QMap<Revision, bool> &revisions = itFile.value();
        QMap<Revision, bool>::iterator itRev
                = revisions.begin();
        QMap<Revision, bool>::iterator itRevEnd
                = revisions.end();
        if (itRev != itRevEnd) {
            m_collectedRevisions[fileName][itRev.key()] = contents;

            itRev = revisions.erase(itRev);
            if (revisions.isEmpty())
                m_pendingRevisions.erase(itFile);
        }
    }

    collectFilesContents();
}

void GitDiffHandler::feedEditor()
{
    if (m_editorController.isNull()) {
        deleteLater();
        return;
    }

    QList<DiffEditor::DiffEditorController::DiffFilesContents> list;

    QMap<QString, QList<RevisionRange> >::const_iterator itFile
            = m_requestedRevisionRanges.constBegin();
    QMap<QString, QList<RevisionRange> >::const_iterator itFileEnd
            = m_requestedRevisionRanges.constEnd();
    while (itFile != itFileEnd) {
        const QString fileName = itFile.key();
        const QList<RevisionRange> &ranges = itFile.value();
        for (int i = 0; i < ranges.count(); i++) {
            const Revision leftRevision = ranges.at(i).begin;
            const Revision rightRevision = ranges.at(i).end;

            DiffEditor::DiffEditorController::DiffFilesContents dfc;
            dfc.leftFileInfo = DiffEditor::DiffEditorController::DiffFileInfo(fileName, leftRevision.infoText());
            dfc.leftText = m_collectedRevisions[fileName][leftRevision];
            dfc.rightFileInfo = DiffEditor::DiffEditorController::DiffFileInfo(fileName, rightRevision.infoText());
            dfc.rightText = m_collectedRevisions[fileName][rightRevision];
            list.append(dfc);
        }

        ++itFile;
    }

    m_editorController->setDiffContents(list, m_workingDirectory);
    deleteLater();
}

QString GitDiffHandler::workingTreeContents(const QString &fileName) const
{
    QDir workingDir(m_workingDirectory);
    QString absoluteFileName = workingDir.absoluteFilePath(fileName);

    QFile file(absoluteFileName);
    if (file.open(QIODevice::ReadOnly | QIODevice::Text))
        return Core::EditorManager::defaultTextCodec()->toUnicode(file.readAll());
    return QString();
}

///////////////////////////////////////////////////////////

class BaseGitDiffArgumentsWidget : public VcsBase::VcsBaseEditorParameterWidget
{
    Q_OBJECT

public:
    BaseGitDiffArgumentsWidget(GitClient *client, const QString &directory,
                               const QStringList &args) :
        m_workingDirectory(directory),
        m_client(client)
    {
        QTC_ASSERT(!directory.isEmpty(), return);
        QTC_ASSERT(m_client, return);

        m_patienceButton = addToggleButton(QLatin1String("--patience"), tr("Patience"),
                                           tr("Use the patience algorithm for calculating the differences."));
        mapSetting(m_patienceButton, client->settings()->boolPointer(GitSettings::diffPatienceKey));
        m_ignoreWSButton = addToggleButton(QLatin1String("--ignore-space-change"), tr("Ignore Whitespace"),
                                           tr("Ignore whitespace only changes."));
        mapSetting(m_ignoreWSButton, m_client->settings()->boolPointer(GitSettings::ignoreSpaceChangesInDiffKey));

        setBaseArguments(args);
    }

protected:
    QString m_workingDirectory;
    GitClient *m_client;
    QToolButton *m_patienceButton;
    QToolButton *m_ignoreWSButton;
};

class GitCommitDiffArgumentsWidget : public BaseGitDiffArgumentsWidget
{
    Q_OBJECT

public:
    GitCommitDiffArgumentsWidget(Git::Internal::GitClient *client, const QString &directory,
                                 const QStringList &unstaged, const QStringList &staged) :
        BaseGitDiffArgumentsWidget(client, directory, QStringList())
    {
        setFileNames(unstaged, staged);
    }

    void setFileNames(const QStringList &unstaged, const QStringList &staged)
    {
        m_unstagedFileNames = unstaged;
        m_stagedFileNames = staged;
    }

    void executeCommand()
    {
        m_client->diff(m_workingDirectory, m_unstagedFileNames, m_stagedFileNames);
    }

private:
    QStringList m_unstagedFileNames;
    QStringList m_stagedFileNames;
};

class GitFileDiffArgumentsWidget : public BaseGitDiffArgumentsWidget
{
    Q_OBJECT
public:
    GitFileDiffArgumentsWidget(Git::Internal::GitClient *client, const QString &directory,
                               const QString &file) :
        BaseGitDiffArgumentsWidget(client, directory, QStringList()),
        m_fileName(file)
    { }

    void executeCommand()
    {
        m_client->diff(m_workingDirectory, m_fileName);
    }

private:
    const QString m_fileName;
};

class GitBranchDiffArgumentsWidget : public BaseGitDiffArgumentsWidget
{
    Q_OBJECT
public:
    GitBranchDiffArgumentsWidget(Git::Internal::GitClient *client, const QString &directory,
                                 const QStringList &args, const QString &branch) :
        BaseGitDiffArgumentsWidget(client, directory, args),
        m_branchName(branch)
    { }

    void executeCommand()
    {
        m_client->diffBranch(m_workingDirectory, baseArguments(), m_branchName);
    }

private:
    const QString m_branchName;
};

class GitShowArgumentsWidget : public BaseGitDiffArgumentsWidget
{
    Q_OBJECT

public:
    GitShowArgumentsWidget(Git::Internal::GitClient *client,
                           const QString &directory,
                           const QStringList &args,
                           const QString &id) :
        BaseGitDiffArgumentsWidget(client, directory, args),
        m_client(client),
        m_workingDirectory(directory),
        m_id(id)
    {
        QList<ComboBoxItem> prettyChoices;
        prettyChoices << ComboBoxItem(tr("oneline"), QLatin1String("oneline"))
                      << ComboBoxItem(tr("short"), QLatin1String("short"))
                      << ComboBoxItem(tr("medium"), QLatin1String("medium"))
                      << ComboBoxItem(tr("full"), QLatin1String("full"))
                      << ComboBoxItem(tr("fuller"), QLatin1String("fuller"))
                      << ComboBoxItem(tr("email"), QLatin1String("email"))
                      << ComboBoxItem(tr("raw"), QLatin1String("raw"));
        mapSetting(addComboBox(QStringList(QLatin1String("--pretty=%1")), prettyChoices),
                   m_client->settings()->intPointer(GitSettings::showPrettyFormatKey));
    }

    void executeCommand()
    {
        m_client->show(m_workingDirectory, m_id, baseArguments());
    }

private:
    GitClient *m_client;
    QString m_workingDirectory;
    QString m_id;
};

class GitBlameArgumentsWidget : public VcsBase::VcsBaseEditorParameterWidget
{
    Q_OBJECT

public:
    GitBlameArgumentsWidget(Git::Internal::GitClient *client,
                            const QString &directory,
                            const QStringList &args,
                            const QString &revision, const QString &fileName) :
        m_editor(0),
        m_client(client),
        m_workingDirectory(directory),
        m_revision(revision),
        m_fileName(fileName)
    {
        mapSetting(addToggleButton(QString(), tr("Omit Date"),
                                   tr("Hide the date of a change from the output.")),
                   m_client->settings()->boolPointer(GitSettings::omitAnnotationDateKey));
        mapSetting(addToggleButton(QLatin1String("-w"), tr("Ignore Whitespace"),
                                   tr("Ignore whitespace only changes.")),
                   m_client->settings()->boolPointer(GitSettings::ignoreSpaceChangesInBlameKey));

        setBaseArguments(args);
    }

    void setEditor(VcsBase::VcsBaseEditorWidget *editor)
    {
        QTC_ASSERT(editor, return);
        m_editor = editor;
    }

    void executeCommand()
    {
        int line = -1;
        if (m_editor)
            line = m_editor->lineNumberOfCurrentEditor();
        m_client->blame(m_workingDirectory, baseArguments(), m_fileName, m_revision, line);
    }

private:
    VcsBase::VcsBaseEditorWidget *m_editor;
    GitClient *m_client;
    QString m_workingDirectory;
    QString m_revision;
    QString m_fileName;
};

class GitLogArgumentsWidget : public BaseGitDiffArgumentsWidget
{
    Q_OBJECT

public:
    GitLogArgumentsWidget(Git::Internal::GitClient *client,
                          const QString &directory,
                          bool enableAnnotationContextMenu,
                          const QStringList &args,
                          const QString &fileName) :
        BaseGitDiffArgumentsWidget(client, directory, args),
        m_client(client),
        m_workingDirectory(directory),
        m_enableAnnotationContextMenu(enableAnnotationContextMenu)
    {
        QTC_ASSERT(!directory.isEmpty(), return);
        QToolButton *diffButton = addToggleButton(QLatin1String("--patch"), tr("Show Diff"),
                                              tr("Show difference."));
        mapSetting(diffButton, m_client->settings()->boolPointer(GitSettings::logDiffKey));
        connect(diffButton, SIGNAL(toggled(bool)), m_patienceButton, SLOT(setVisible(bool)));
        connect(diffButton, SIGNAL(toggled(bool)), m_ignoreWSButton, SLOT(setVisible(bool)));
        m_patienceButton->setVisible(diffButton->isChecked());
        m_ignoreWSButton->setVisible(diffButton->isChecked());
        QStringList graphArguments(QLatin1String("--graph"));
        graphArguments << QLatin1String("--oneline") << QLatin1String("--topo-order");
        graphArguments << (QLatin1String("--pretty=format:") + QLatin1String(graphLogFormatC));
        QToolButton *graphButton = addToggleButton(graphArguments, tr("Graph"),
                                              tr("Show textual graph log."));
        mapSetting(graphButton, m_client->settings()->boolPointer(GitSettings::graphLogKey));
        setFileName(fileName);
    }

    void setFileName(const QString &fileNames)
    {
        m_fileName = fileNames;
    }

    void executeCommand()
    {
        m_client->log(m_workingDirectory, m_fileName, m_enableAnnotationContextMenu, baseArguments());
    }

private:
    GitClient *m_client;
    QString m_workingDirectory;
    bool m_enableAnnotationContextMenu;
    QString m_fileName;
};

class ConflictHandler : public QObject
{
    Q_OBJECT
public:
    ConflictHandler(VcsBase::Command *parentCommand,
                    const QString &workingDirectory,
                    const QString &command = QString())
        : QObject(parentCommand),
          m_workingDirectory(workingDirectory),
          m_command(command)
    {
        if (parentCommand) {
            parentCommand->addFlags(VcsBasePlugin::ExpectRepoChanges);
            connect(parentCommand, SIGNAL(output(QString)), this, SLOT(readStdOut(QString)));
            connect(parentCommand, SIGNAL(errorText(QString)), this, SLOT(readStdErr(QString)));
        }
    }

    ~ConflictHandler()
    {
        // If interactive rebase editor window is closed, plugin is terminated
        // but referenced here when the command ends
        if (GitPlugin *plugin = GitPlugin::instance()) {
            GitClient *client = plugin->gitClient();
            if (m_commit.isEmpty() && m_files.isEmpty()) {
                if (client->checkCommandInProgress(m_workingDirectory) == GitClient::NoCommand)
                    client->endStashScope(m_workingDirectory);
            } else {
                client->handleMergeConflicts(m_workingDirectory, m_commit, m_files, m_command);
            }
        }
    }

public slots:
    void readStdOut(const QString &data)
    {
        static QRegExp patchFailedRE(QLatin1String("Patch failed at ([^\\n]*)"));
        static QRegExp conflictedFilesRE(QLatin1String("Merge conflict in ([^\\n]*)"));
        if (patchFailedRE.indexIn(data) != -1)
            m_commit = patchFailedRE.cap(1);
        int fileIndex = -1;
        while ((fileIndex = conflictedFilesRE.indexIn(data, fileIndex + 1)) != -1) {
            m_files.append(conflictedFilesRE.cap(1));
        }
    }

    void readStdErr(const QString &data)
    {
        static QRegExp couldNotApplyRE(QLatin1String("[Cc]ould not (?:apply|revert) ([^\\n]*)"));
        if (couldNotApplyRE.indexIn(data) != -1)
            m_commit = couldNotApplyRE.cap(1);
    }
private:
    QString m_workingDirectory;
    QString m_command;
    QString m_commit;
    QStringList m_files;
};

class ProgressParser : public VcsBase::ProgressParser
{
public:
    ProgressParser() :
        m_progressExp(QLatin1String("\\((\\d+)/(\\d+)\\)")) // e.g. Rebasing (7/42)
    {
    }

protected:
    void parseProgress(const QString &text)
    {
        if (m_progressExp.lastIndexIn(text) != -1)
            setProgressAndMaximum(m_progressExp.cap(1).toInt(), m_progressExp.cap(2).toInt());
    }

private:
    QRegExp m_progressExp;
};



Core::IEditor *locateEditor(const char *property, const QString &entry)
{
    foreach (Core::IDocument *document, Core::EditorManager::documentModel()->openedDocuments())
        if (document->property(property).toString() == entry)
            return Core::EditorManager::documentModel()->editorsForDocument(document).first();
    return 0;
}

// Return converted command output, remove '\r' read on Windows
static inline QString commandOutputFromLocal8Bit(const QByteArray &a)
{
    return Utils::SynchronousProcess::normalizeNewlines(QString::fromLocal8Bit(a));
}

// Return converted command output split into lines
static inline QStringList commandOutputLinesFromLocal8Bit(const QByteArray &a)
{
    QString output = commandOutputFromLocal8Bit(a);
    const QChar newLine = QLatin1Char('\n');
    if (output.endsWith(newLine))
        output.truncate(output.size() - 1);
    if (output.isEmpty())
        return QStringList();
    return output.split(newLine);
}

static inline VcsBase::VcsBaseOutputWindow *outputWindow()
{
    return VcsBase::VcsBaseOutputWindow::instance();
}

static inline QString msgRepositoryNotFound(const QString &dir)
{
    return GitClient::tr("Cannot determine the repository for \"%1\".").arg(dir);
}

static inline QString msgParseFilesFailed()
{
    return  GitClient::tr("Cannot parse the file output.");
}

static inline QString msgCannotLaunch(const QString &binary)
{
    return GitClient::tr("Cannot launch \"%1\".").arg(QDir::toNativeSeparators(binary));
}

static inline QString currentDocumentPath()
{
    if (Core::IDocument *document= Core::EditorManager::currentDocument())
        return QFileInfo(document->filePath()).path();
    return QString();
}

static inline QStringList statusArguments()
{
    return QStringList() << QLatin1String("-c") << QLatin1String("color.status=false")
                         << QLatin1String("status");
}

static inline void msgCannotRun(const QString &message, QString *errorMessage)
{
    if (errorMessage)
        *errorMessage = message;
    else
        outputWindow()->appendError(message);
}

static inline void msgCannotRun(const QStringList &args, const QString &workingDirectory,
                                const QByteArray &error, QString *errorMessage)
{
    const QString message = GitClient::tr("Cannot run \"%1 %2\" in \"%2\": %3")
            .arg(QLatin1String("git ") + args.join(QLatin1String(" ")),
                 QDir::toNativeSeparators(workingDirectory),
                 commandOutputFromLocal8Bit(error));

    msgCannotRun(message, errorMessage);
}

// ---------------- GitClient

const char *GitClient::stashNamePrefix = "stash@{";

GitClient::GitClient(GitSettings *settings) :
    m_cachedGitVersion(0),
    m_msgWait(tr("Waiting for data...")),
    m_settings(settings),
    m_disableEditor(false)
{
    QTC_CHECK(settings);
    connect(Core::ICore::instance(), SIGNAL(saveSettingsRequested()), this, SLOT(saveSettings()));
    m_gitQtcEditor = QString::fromLatin1("\"%1\" -client -block -pid %2")
            .arg(QCoreApplication::applicationFilePath())
            .arg(QCoreApplication::applicationPid());
}

GitClient::~GitClient()
{
}

QString GitClient::findRepositoryForDirectory(const QString &dir)
{
    if (dir.isEmpty() || dir.endsWith(QLatin1String("/.git"))
            || dir.contains(QLatin1String("/.git/"))) {
        return QString();
    }
    QDir directory(dir);
    QString dotGit = QLatin1String(GIT_DIRECTORY);
    // QFileInfo is outside loop, because it is faster this way
    QFileInfo fileInfo;
    do {
        if (directory.exists(dotGit)) {
            fileInfo.setFile(directory, dotGit);
            if (fileInfo.isFile())
                return directory.absolutePath();
            else if