src/eric7/Plugins/VcsPlugins/vcsMercurial/hg.py

# -*- coding: utf-8 -*-

# Copyright (c) 2010 - 2024 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing the version control systems interface to Mercurial.
"""

import contextlib
import os
import pathlib
import shutil

from PyQt6.QtCore import QCoreApplication, pyqtSignal
from PyQt6.QtWidgets import QApplication, QDialog, QInputDialog

from eric7 import Preferences, Utilities
from eric7.EricCore import EricFileSystemWatcher
from eric7.EricWidgets import EricFileDialog, EricMessageBox
from eric7.EricWidgets.EricApplication import ericApp
from eric7.QScintilla.MiniEditor import MiniEditor
from eric7.SystemUtilities import FileSystemUtilities
from eric7.VCS.RepositoryInfoDialog import VcsRepositoryInfoDialog
from eric7.VCS.VersionControl import VersionControl, VersionControlState

from .HgClient import HgClient
from .HgDialog import HgDialog


class Hg(VersionControl):
    """
    Class implementing the version control systems interface to Mercurial.

    @signal committed() emitted after the commit action has completed
    @signal activeExtensionsChanged() emitted when the list of active
        extensions has changed
    @signal iniFileChanged() emitted when a Mercurial/repo configuration file
        has changed
    """

    committed = pyqtSignal()
    activeExtensionsChanged = pyqtSignal()
    iniFileChanged = pyqtSignal()

    IgnoreFileName = ".hgignore"

    def __init__(self, plugin, parent=None, name=None):
        """
        Constructor

        @param plugin reference to the plugin object
        @type VcsMercurialPlugin
        @param parent parent widget
        @type QWidget
        @param name name of this object
        @type str
        """
        from .CloseheadExtension.closehead import Closehead
        from .GpgExtension.gpg import Gpg
        from .HgUtilities import getConfigPath
        from .HisteditExtension.histedit import Histedit
        from .LargefilesExtension.largefiles import Largefiles
        from .PurgeExtension.purge import Purge
        from .QueuesExtension.queues import Queues
        from .RebaseExtension.rebase import Rebase
        from .ShelveExtension.shelve import Shelve
        from .StripExtension.strip import Strip

        VersionControl.__init__(self, parent, name)
        self.defaultOptions = {
            "global": [""],
            "commit": [""],
            "checkout": [""],
            "update": [""],
            "add": [""],
            "remove": [""],
            "diff": [""],
            "log": [""],
            "history": [""],
            "status": [""],
            "tag": [""],
            "export": [""],
        }

        self.__plugin = plugin
        self.__ui = parent

        self.options = self.defaultOptions
        self.tagsList = []
        self.branchesList = []
        self.allTagsBranchesList = []
        self.bookmarksList = []
        self.showedTags = False
        self.showedBranches = False

        self.tagTypeList = [
            "tags",
            "branches",
        ]

        self.commandHistory = []

        if "HG_ASP_DOT_NET_HACK" in os.environ:
            self.adminDir = "_hg"
        else:
            self.adminDir = ".hg"

        self.logBrowser = None
        self.logBrowserIncoming = None
        self.logBrowserOutgoing = None
        self.diff = None
        self.sbsDiff = None
        self.status = None
        self.summary = None
        self.tagbranchList = None
        self.annotate = None
        self.repoEditor = None
        self.serveDlg = None
        self.bookmarksListDlg = None
        self.bookmarksInOutDlg = None
        self.conflictsDlg = None

        self.bundleFile = None
        self.__lastChangeGroupPath = None

        self.statusCache = {}

        self.__commitData = {}
        self.__commitDialog = None

        self.__forgotNames = []

        self.__activeExtensions = []

        self.__iniFileChangedFlag = False

        watcher = EricFileSystemWatcher.instance()
        watcher.fileDeleted.connect(self.__iniFileChanged)
        watcher.fileModified.connect(self.__iniFileChanged)
        self.__cfgFile = getConfigPath()
        if os.path.exists(self.__cfgFile):
            watcher.addPath(self.__cfgFile)

        self.__client = None
        self.__createClient()
        self.__projectHelper = None

        self.__repoDir = ""
        self.__repoIniFile = ""
        self.__defaultConfigured = False
        self.__defaultPushConfigured = False
        self.__ignoreFile = ""

        # instantiate the extensions
        self.__extensions = {
            "mq": Queues(self, ui=self.__ui),
            "purge": Purge(self, ui=self.__ui),
            "gpg": Gpg(self, ui=self.__ui),
            "rebase": Rebase(self, ui=self.__ui),
            "shelve": Shelve(self, ui=self.__ui),
            "largefiles": Largefiles(self, ui=self.__ui),
            "strip": Strip(self, ui=self.__ui),
            "histedit": Histedit(self, ui=self.__ui),
            "closehead": Closehead(self, ui=self.__ui),
        }

    def getPlugin(self):
        """
        Public method to get a reference to the plugin object.

        @return reference to the plugin object
        @rtype VcsMercurialPlugin
        """
        return self.__plugin

    def getEncoding(self):
        """
        Public method to get the encoding to be used by Mercurial.

        @return encoding
        @rtype str
        """
        return self.__plugin.getPreferences("Encoding")

    def vcsShutdown(self):
        """
        Public method used to shutdown the Mercurial interface.
        """
        if self.logBrowser is not None:
            self.logBrowser.close()
        if self.logBrowserIncoming is not None:
            self.logBrowserIncoming.close()
        if self.logBrowserOutgoing is not None:
            self.logBrowserOutgoing.close()
        if self.diff is not None:
            self.diff.close()
        if self.sbsDiff is not None:
            self.sbsDiff.close()
        if self.status is not None:
            self.status.close()
        if self.summary is not None:
            self.summary.close()
        if self.tagbranchList is not None:
            self.tagbranchList.close()
        if self.annotate is not None:
            self.annotate.close()
        if self.serveDlg is not None:
            self.serveDlg.close()

        if self.bookmarksListDlg is not None:
            self.bookmarksListDlg.close()
        if self.bookmarksInOutDlg is not None:
            self.bookmarksInOutDlg.close()

        if self.conflictsDlg is not None:
            self.conflictsDlg.close()

        if self.bundleFile and os.path.exists(self.bundleFile):
            os.remove(self.bundleFile)

        # shut down the project helpers
        if self.__projectHelper is not None:
            self.__projectHelper.shutdown()

        # shut down the extensions
        for extension in self.__extensions.values():
            extension.shutdown()

        # shut down the client
        self.__client and self.__client.stopServer()

        watcher = EricFileSystemWatcher.instance()
        watcher.fileDeleted.disconnect(self.__iniFileChanged)
        watcher.fileModified.disconnect(self.__iniFileChanged)
        watcher.removePath(self.__cfgFile)
        if self.__repoIniFile:
            watcher.removePath(self.__repoIniFile)
        if self.__ignoreFile:
            watcher.removePath(self.__ignoreFile)

    def initCommand(self, command):
        """
        Public method to initialize a command arguments list.

        @param command command name
        @type str
        @return list of command options
        @rtype list of str
        """
        args = [command]
        self.addArguments(args, self.__plugin.getGlobalOptions())
        return args

    def vcsExists(self):
        """
        Public method used to test for the presence of the hg executable.

        @return flag indicating the existence and an error message
        @rtype tuple of (bool, str)
        """
        from .HgUtilities import hgVersion

        self.versionStr, self.version, errMsg = hgVersion(self.__plugin)
        hgExists = errMsg == ""
        if hgExists:
            self.__getExtensionsInfo()
        return hgExists, errMsg

    def vcsInit(self, _vcsDir, noDialog=False):  # noqa: U100
        """
        Public method used to initialize the mercurial repository.

        The initialization is done, when a project is converted into a
        Mercurial controlled project. Therefore we always return TRUE without
        doing anything.

        @param _vcsDir name of the VCS directory (unused)
        @type str
        @param noDialog flag indicating quiet operations (unused)
        @type bool
        @return always True
        @rtype bool
        """
        return True

    def vcsConvertProject(self, vcsDataDict, project, addAll=True):
        """
        Public method to convert an uncontrolled project to a version
        controlled project.

        @param vcsDataDict dictionary of data required for the conversion
        @type dict
        @param project reference to the project object
        @type Project
        @param addAll flag indicating to add all files to the repository
        @type bool
        """
        success = self.vcsImport(vcsDataDict, project.ppath, addAll=addAll)[0]
        if not success:
            EricMessageBox.critical(
                self.__ui,
                self.tr("Create project repository"),
                self.tr("""The project repository could not be created."""),
            )
        else:
            pfn = project.pfile
            if not os.path.isfile(pfn):
                pfn += "z"
            project.closeProject()
            project.openProject(pfn)

    def vcsImport(
        self, vcsDataDict, projectDir, noDialog=False, addAll=True  # noqa: U100
    ):
        """
        Public method used to import the project into the Mercurial repository.

        @param vcsDataDict dictionary of data required for the import
        @type dict
        @param projectDir project directory
        @type str
        @param noDialog flag indicating quiet operations (unused)
        @type bool
        @param addAll flag indicating to add all files to the repository
        @type bool
        @return tuple containing a flag indicating an execution without errors
            and a flag indicating the version controll status
        @rtype tuple of (bool, bool)
        """
        msg = vcsDataDict["message"]
        if not msg:
            msg = "***"

        args = self.initCommand("init")
        args.append(projectDir)
        dia = HgDialog(
            self.tr("Creating Mercurial repository"), hg=self, parent=self.__ui
        )
        res = dia.startProcess(args)
        if res:
            dia.exec()
        status = dia.normalExit()

        if status:
            self.stopClient()
            self.__repoDir = projectDir

            ignoreName = os.path.join(projectDir, Hg.IgnoreFileName)
            if not os.path.exists(ignoreName):
                status = self.hgCreateIgnoreFile(projectDir)

            if status and addAll:
                args = self.initCommand("commit")
                args.append("--addremove")
                args.append("--message")
                args.append(msg)
                dia = HgDialog(
                    self.tr("Initial commit to Mercurial repository"),
                    hg=self,
                    parent=self.__ui,
                )
                res = dia.startProcess(args)
                if res:
                    dia.exec()
                status = dia.normalExit()

        return status, False

    def vcsCheckout(self, vcsDataDict, projectDir, noDialog=False):
        """
        Public method used to check the project out of a Mercurial repository
        (clone).

        @param vcsDataDict dictionary of data required for the checkout
        @type dict
        @param projectDir project directory to create
        @type str
        @param noDialog flag indicating quiet operations
        @type bool
        @return flag indicating an execution without errors
        @rtype bool
        """
        noDialog = False
        try:
            rev = vcsDataDict["revision"]
        except KeyError:
            rev = None
        vcsUrl = self.hgNormalizeURL(vcsDataDict["url"])

        args = self.initCommand("clone")
        if rev:
            args.append("--rev")
            args.append(rev)
        if vcsDataDict["largefiles"]:
            args.append("--all-largefiles")
        args.append(vcsUrl)
        args.append(projectDir)

        if noDialog:
            _out, err = self.__client.runcommand(args)
            return err == ""
        else:
            dia = HgDialog(
                self.tr("Cloning project from a Mercurial repository"),
                hg=self,
                parent=self.__ui,
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()
            return dia.normalExit()

    def vcsExport(self, vcsDataDict, projectDir):
        """
        Public method used to export a directory from the Mercurial repository.

        @param vcsDataDict dictionary of data required for the checkout
        @type dict
        @param projectDir project directory to create
        @type str
        @return flag indicating an execution without errors
        @rtype bool
        """
        status = self.vcsCheckout(vcsDataDict, projectDir)
        shutil.rmtree(os.path.join(projectDir, self.adminDir), ignore_errors=True)
        if os.path.exists(os.path.join(projectDir, Hg.IgnoreFileName)):
            os.remove(os.path.join(projectDir, Hg.IgnoreFileName))
        return status

    def vcsCommit(
        self, name, message, noDialog=False, closeBranch=False, mq=False, merge=False
    ):
        """
        Public method used to make the change of a file/directory permanent
        in the Mercurial repository.

        @param name file/directory name to be committed
        @type str or list of str
        @param message message for this operation
        @type str
        @param noDialog flag indicating quiet operations
        @type bool
        @param closeBranch flag indicating a close branch commit
        @type bool
        @param mq flag indicating a queue commit
        @type bool
        @param merge flag indicating a merge commit
        @type bool
        """
        from .HgCommitDialog import HgCommitDialog

        msg = message

        if mq or merge:
            # ensure dialog is shown for a queue commit
            noDialog = False

        if not noDialog:
            # call CommitDialog and get message from there
            if self.__commitDialog is None:
                self.__commitDialog = HgCommitDialog(self, msg, mq, merge, self.__ui)
                self.__commitDialog.accepted.connect(self.__vcsCommit_Step2)
            self.__commitDialog.show()
            self.__commitDialog.raise_()
            self.__commitDialog.activateWindow()

        self.__commitData["name"] = name
        self.__commitData["msg"] = msg
        self.__commitData["noDialog"] = noDialog
        self.__commitData["closeBranch"] = closeBranch
        self.__commitData["mq"] = mq
        self.__commitData["merge"] = merge

        if noDialog:
            self.__vcsCommit_Step2()

    def __vcsCommit_Step2(self):
        """
        Private slot performing the second step of the commit action.
        """
        name = self.__commitData["name"]
        msg = self.__commitData["msg"]
        noDialog = self.__commitData["noDialog"]
        closeBranch = self.__commitData["closeBranch"]
        mq = self.__commitData["mq"]
        merge = self.__commitData["merge"]

        if not noDialog:
            # check, if there are unsaved changes, that should be committed
            if isinstance(name, list):
                nameList = name
            else:
                nameList = [name]
            ok = True
            for nam in nameList:
                # check for commit of the project
                if os.path.isdir(nam):
                    project = ericApp().getObject("Project")
                    if nam == project.getProjectPath():
                        ok &= (
                            project.checkAllScriptsDirty(reportSyntaxErrors=True)
                            and project.checkDirty()
                        )
                        continue
                elif os.path.isfile(nam):
                    editor = ericApp().getObject("ViewManager").getOpenEditor(nam)
                    if editor:
                        ok &= editor.checkDirty()
                if not ok:
                    break

            if not ok:
                res = EricMessageBox.yesNo(
                    self.__ui,
                    self.tr("Commit Changes"),
                    self.tr(
                        """The commit affects files, that have unsaved"""
                        """ changes. Shall the commit be continued?"""
                    ),
                    icon=EricMessageBox.Warning,
                )
                if not res:
                    return

        if self.__commitDialog is not None:
            (
                msg,
                amend,
                commitSubrepositories,
                author,
                dateTime,
            ) = self.__commitDialog.getCommitData()
            self.__commitDialog.deleteLater()
            self.__commitDialog = None
            if amend and not msg:
                msg = self.__getMostRecentCommitMessage()
        else:
            amend = False
            commitSubrepositories = False
            author = ""
            dateTime = ""

        if not msg and not amend:
            msg = "***"

        args = self.initCommand("commit")
        args.append("-v")
        if mq:
            args.append("--mq")
        elif merge:
            if author:
                args.append("--user")
                args.append(author)
            if dateTime:
                args.append("--date")
                args.append(dateTime)
        else:
            if closeBranch:
                args.append("--close-branch")
            if amend:
                args.append("--amend")
            if commitSubrepositories:
                args.append("--subrepos")
            if author:
                args.append("--user")
                args.append(author)
            if dateTime:
                args.append("--date")
                args.append(dateTime)
        if msg:
            args.append("--message")
            args.append(msg)
        if isinstance(name, list):
            self.addArguments(args, name)
        else:
            args.append(name)

        dia = HgDialog(
            self.tr("Committing changes to Mercurial repository"),
            hg=self,
            parent=self.__ui,
        )
        res = dia.startProcess(args)
        if res:
            dia.exec()
        self.committed.emit()
        if self.__forgotNames:
            model = ericApp().getObject("Project").getModel()
            for name in self.__forgotNames:
                model.updateVCSStatus(name)
            self.__forgotNames = []
        self.checkVCSStatus()

    def vcsCommitMessages(self):
        """
        Public method to get the list of saved commit messages.

        @return list of saved commit messages
        @rtype list of str
        """
        # try per project commit history first
        messages = self._vcsProjectCommitMessages()
        if not messages:
            # empty list returned, try the vcs specific one
            messages = self.getPlugin().getPreferences("Commits")

        return messages

    def vcsAddCommitMessage(self, message):
        """
        Public method to add a commit message to the list of saved messages.

        @param message message to be added
        @type str
        """
        if not self._vcsAddProjectCommitMessage(message):
            commitMessages = self.vcsCommitMessages()
            if message in commitMessages:
                commitMessages.remove(message)
            commitMessages.insert(0, message)
            no = Preferences.getVCS("CommitMessages")
            del commitMessages[no:]
            self.getPlugin().setPreferences("Commits", commitMessages)

    def vcsClearCommitMessages(self):
        """
        Public method to clear the list of saved messages.
        """
        if not self._vcsClearProjectCommitMessages():
            self.getPlugin().setPreferences("Commits", [])

    def __getMostRecentCommitMessage(self):
        """
        Private method to get the most recent commit message.

        Note: This message is extracted from the parent commit of the
        working directory.

        @return most recent commit message
        @rtype str
        """
        args = self.initCommand("log")
        args.append("--rev")
        args.append(".")
        args.append("--template")
        args.append("{desc}")

        output, error = self.__client.runcommand(args)

        return output

    def vcsUpdate(self, name=None, noDialog=False, revision=None):  # noqa: U100
        """
        Public method used to update a file/directory with the Mercurial
        repository.

        @param name file/directory name to be updated (unused)
        @type str
        @param noDialog flag indicating quiet operations
        @type bool
        @param revision revision to update to
        @type str
        @return flag indicating, that the update contained an add or delete
        @rtype bool
        """
        args = self.initCommand("update")
        if "-v" not in args and "--verbose" not in args:
            args.append("-v")
        if revision:
            args.append("-r")
            args.append(revision)

        if noDialog:
            _out, err = self.__client.runcommand(args)
            res = False
        else:
            dia = HgDialog(
                self.tr("Synchronizing with the Mercurial repository"),
                hg=self,
                parent=self.__ui,
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()
                res = dia.hasAddOrDelete()
        self.checkVCSStatus()
        return res

    def vcsAdd(self, name, isDir=False, noDialog=False):  # noqa: U100
        """
        Public method used to add a file/directory to the Mercurial repository.

        @param name file/directory name to be added
        @type str
        @param isDir flag indicating name is a directory (unused)
        @type bool
        @param noDialog flag indicating quiet operations
        @type bool
        """
        args = self.initCommand("add")
        args.append("-v")

        if isinstance(name, list):
            self.addArguments(args, name)
        else:
            args.append(name)

        if noDialog:
            _out, err = self.__client.runcommand(args)
        else:
            dia = HgDialog(
                self.tr("Adding files/directories to the Mercurial repository"),
                hg=self,
                parent=self.__ui,
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def vcsAddBinary(self, name, isDir=False):
        """
        Public method used to add a file/directory in binary mode to the
        Mercurial repository.

        @param name file/directory name to be added
        @type str
        @param isDir flag indicating name is a directory
        @type bool
        """
        self.vcsAdd(name, isDir)

    def vcsAddTree(self, path):
        """
        Public method to add a directory tree rooted at path to the Mercurial
        repository.

        @param path root directory of the tree to be added
        @type str or list of str
        """
        self.vcsAdd(path, isDir=False)

    def vcsRemove(self, name, project=False, noDialog=False):  # noqa: U100
        """
        Public method used to remove a file/directory from the Mercurial
        repository.

        The default operation is to remove the local copy as well.

        @param name file/directory name to be removed
        @type str or list of str
        @param project flag indicating deletion of a project tree (unused)
        @type bool
        @param noDialog flag indicating quiet operations
        @type bool
        @return flag indicating successfull operation
        @rtype bool
        """
        args = self.initCommand("remove")
        args.append("-v")
        if noDialog and "--force" not in args:
            args.append("--force")

        if isinstance(name, list):
            self.addArguments(args, name)
        else:
            args.append(name)

        if noDialog:
            _out, err = self.__client.runcommand(args)
            res = err == ""
        else:
            dia = HgDialog(
                self.tr("Removing files/directories from the Mercurial repository"),
                hg=self,
                parent=self.__ui,
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()
                res = dia.normalExitWithoutErrors()

        return res

    def vcsMove(self, name, project, target=None, noDialog=False):
        """
        Public method used to move a file/directory.

        @param name file/directory name to be moved
        @type str
        @param project reference to the project object
        @type Project
        @param target new name of the file/directory
        @type str
        @param noDialog flag indicating quiet operations
        @type bool
        @return flag indicating successfull operation
        @rtype bool
        """
        from .HgCopyDialog import HgCopyDialog

        isDir = os.path.isdir(name)

        res = False
        if noDialog:
            if target is None:
                return False
            force = True
            accepted = True
        else:
            dlg = HgCopyDialog(name, parent=self.__ui, move=True)
            accepted = dlg.exec() == QDialog.DialogCode.Accepted
            if accepted:
                target, force = dlg.getData()

        if accepted:
            args = self.initCommand("rename")
            args.append("-v")
            if force:
                args.append("--force")
            args.append(name)
            args.append(target)

            if noDialog:
                _out, err = self.__client.runcommand(args)
                res = err == ""
            else:
                dia = HgDialog(
                    self.tr("Renaming {0}").format(name), hg=self, parent=self.__ui
                )
                res = dia.startProcess(args)
                if res:
                    dia.exec()
                    res = dia.normalExit()
            if res:
                if target.startswith(project.getProjectPath()):
                    if isDir:
                        project.moveDirectory(name, target)
                    else:
                        project.renameFileInPdata(name, target)
                else:
                    if isDir:
                        project.removeDirectory(name)
                    else:
                        project.removeFile(name)
        return res

    def vcsDiff(self, name):
        """
        Public method used to view the difference of a file/directory to the
        Mercurial repository.

        If name is a directory and is the project directory, all project files
        are saved first. If name is a file (or list of files), which is/are
        being edited and has unsaved modification, they can be saved or the
        operation may be aborted.

        @param name file/directory name to be diffed
        @type str
        """
        from .HgDiffDialog import HgDiffDialog

        names = name[:] if isinstance(name, list) else [name]
        for nam in names:
            if os.path.isfile(nam):
                editor = ericApp().getObject("ViewManager").getOpenEditor(nam)
                if editor and not editor.checkDirty():
                    return
            else:
                project = ericApp().getObject("Project")
                if nam == project.ppath and not project.saveAllScripts():
                    return
        if self.diff is None:
            self.diff = HgDiffDialog(self)
        self.diff.show()
        self.diff.raise_()
        QApplication.processEvents()
        self.diff.start(name, refreshable=True)

    def vcsStatus(self, name):
        """
        Public method used to view the status of files/directories in the
        Mercurial repository.

        @param name file/directory name(s) to show the status of
        @type str or list of str
        """
        from .HgStatusDialog import HgStatusDialog

        if self.status is None:
            self.status = HgStatusDialog(self)
        self.status.show()
        self.status.raise_()
        self.status.start(name)

    def hgSummary(self, mq=False, largefiles=False):
        """
        Public method used to show some summary information of the
        working directory state.

        @param mq flag indicating to show the queue status as well
        @type bool
        @param largefiles flag indicating to show the largefiles status as
            well
        @type bool
        """
        from .HgSummaryDialog import HgSummaryDialog

        if self.summary is None:
            self.summary = HgSummaryDialog(self)
        self.summary.show()
        self.summary.raise_()
        self.summary.start(mq=mq, largefiles=largefiles)

    def vcsTag(self, name=None, revision=None, tagName=None):  # noqa: U100
        """
        Public method used to set/remove a tag in the Mercurial repository.

        @param name file/directory name to determine the repo root from (unused)
        @type str
        @param revision revision to set tag for
        @type str
        @param tagName name of the tag
        @type str
        @return flag indicating a performed tag action
        @rtype bool
        """
        from .HgTagDialog import HgTagDialog, HgTagOperation

        dlg = HgTagDialog(
            self.hgGetTagsList(withType=True), revision, tagName, parent=self.__ui
        )
        if dlg.exec() == QDialog.DialogCode.Accepted:
            tag, revision, tagOp, force = dlg.getParameters()
        else:
            return False

        args = self.initCommand("tag")
        msgPart = ""
        if tagOp in (HgTagOperation.CreateLocal, HgTagOperation.DeleteLocal):
            args.append("--local")
            msgPart = "local "
        else:
            msgPart = "global "
        if tagOp in (HgTagOperation.DeleteGlobal, HgTagOperation.DeleteLocal):
            args.append("--remove")
        if (
            tagOp in (HgTagOperation.CreateGlobal, HgTagOperation.CreateLocal)
            and revision
        ):
            args.append("--rev")
            args.append(revision)
        if force:
            args.append("--force")
        args.append("--message")
        if tagOp in (HgTagOperation.CreateGlobal, HgTagOperation.CreateLocal):
            tag = tag.strip().replace(" ", "_")
            args.append("Created {1}tag <{0}>.".format(tag, msgPart))
        else:
            args.append("Removed {1}tag <{0}>.".format(tag, msgPart))
        args.append(tag)

        dia = HgDialog(
            self.tr("Tagging in the Mercurial repository"), hg=self, parent=self.__ui
        )
        res = dia.startProcess(args)
        if res:
            dia.exec()

        return True

    def vcsRevert(self, name):
        """
        Public method used to revert changes made to a file/directory.

        @param name file/directory name to be reverted
        @type str
        @return flag indicating, that the update contained an add
            or delete
        @rtype bool
        """
        from eric7.UI.DeleteFilesConfirmationDialog import DeleteFilesConfirmationDialog

        args = self.initCommand("revert")
        if not self.getPlugin().getPreferences("CreateBackup"):
            args.append("--no-backup")
        args.append("-v")
        if isinstance(name, list):
            self.addArguments(args, name)
            names = name[:]
        else:
            args.append(name)
            names = [name]

        project = ericApp().getObject("Project")
        names = [project.getRelativePath(nam) for nam in names]
        if names[0]:
            dlg = DeleteFilesConfirmationDialog(
                self.parent(),
                self.tr("Revert changes"),
                self.tr(
                    "Do you really want to revert all changes to these files"
                    " or directories?"
                ),
                names,
            )
            yes = dlg.exec() == QDialog.DialogCode.Accepted
        else:
            yes = EricMessageBox.yesNo(
                None,
                self.tr("Revert changes"),
                self.tr(
                    """Do you really want to revert all changes of"""
                    """ the project?"""
                ),
            )
        if yes:
            dia = HgDialog(self.tr("Reverting changes"), hg=self, parent=self.__ui)
            res = dia.startProcess(args)
            if res:
                dia.exec()
                res = dia.hasAddOrDelete()
            self.checkVCSStatus()
        else:
            res = False

        return res

    def vcsMerge(self, name, rev=""):  # noqa: U100
        """
        Public method used to merge a URL/revision into the local project.

        @param name file/directory name to be merged (unused)
        @type str
        @param rev revision to merge with
        @type str
        """
        from .HgMergeDialog import HgMergeDialog

        if not rev:
            dlg = HgMergeDialog(
                self.hgGetTagsList(),
                self.hgGetBranchesList(),
                self.hgGetBookmarksList(),
                parent=self.__ui,
            )
            if dlg.exec() == QDialog.DialogCode.Accepted:
                rev, force = dlg.getParameters()
            else:
                return
        else:
            force = False

        args = self.initCommand("merge")
        if force:
            args.append("--force")
        if self.getPlugin().getPreferences("InternalMerge"):
            args.append("--tool")
            args.append("internal:merge")
        if rev:
            args.append("--rev")
            args.append(rev)

        dia = HgDialog(self.tr("Merging"), hg=self, parent=self.__ui)
        res = dia.startProcess(args)
        if res:
            dia.exec()
        self.checkVCSStatus()

    def hgReMerge(self, name):
        """
        Public method used to merge a URL/revision into the local project.

        @param name file/directory name to be merged
        @type str
        """
        from eric7.UI.DeleteFilesConfirmationDialog import DeleteFilesConfirmationDialog

        args = self.initCommand("resolve")
        if self.getPlugin().getPreferences("InternalMerge"):
            args.append("--tool")
            args.append("internal:merge")
        if isinstance(name, list):
            self.addArguments(args, name)
            names = name[:]
        else:
            args.append(name)
            names = [name]

        project = ericApp().getObject("Project")
        names = [project.getRelativePath(nam) for nam in names]
        if names[0]:
            dlg = DeleteFilesConfirmationDialog(
                self.parent(),
                self.tr("Re-Merge"),
                self.tr("Do you really want to re-merge these files or directories?"),
                names,
            )
            yes = dlg.exec() == QDialog.DialogCode.Accepted
        else:
            yes = EricMessageBox.yesNo(
                None,
                self.tr("Re-Merge"),
                self.tr("""Do you really want to re-merge the project?"""),
            )
        if yes:
            dia = HgDialog(
                self.tr("Re-Merging").format(name), hg=self, parent=self.__ui
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()
            self.checkVCSStatus()

    def vcsSwitch(self, name):
        """
        Public method used to switch a working directory to a different
        revision.

        @param name directory name to be switched
        @type str
        @return flag indicating, that the switch contained an add or delete
        @rtype bool
        """
        from .HgRevisionSelectionDialog import HgRevisionSelectionDialog

        dlg = HgRevisionSelectionDialog(
            self.hgGetTagsList(),
            self.hgGetBranchesList(),
            bookmarksList=self.hgGetBookmarksList(),
            noneLabel=self.tr("Current branch tip"),
            parent=self.__ui,
        )
        if dlg.exec() == QDialog.DialogCode.Accepted:
            rev = dlg.getRevision()
            return self.vcsUpdate(name, revision=rev)

        return False

    def vcsRegisteredState(self, name):
        """
        Public method used to get the registered state of a file in the vcs.

        @param name file or directory name to check
        @type str
        @return registered state
        @rtype VersionControlState
        """
        if name.endswith(os.sep):
            name = name[:-1]
        name = os.path.normcase(name)

        if os.path.isdir(name) and os.path.isdir(os.path.join(name, self.adminDir)):
            return VersionControlState.Controlled

        if name in self.statusCache:
            return self.statusCache[name]
        args = self.initCommand("status")
        args.append("--all")
        args.append("--noninteractive")

        output, error = self.__client.runcommand(args)

        if output:
            repodir = self.getClient().getRepository()
            for line in output.splitlines():
                if len(line) > 2 and line[0] in "MARC!?I" and line[1] == " ":
                    flag, path = line.split(" ", 1)
                    absname = FileSystemUtilities.normcasepath(
                        os.path.join(repodir, path)
                    )
                    if flag not in "?I" and absname == name:
                        return VersionControlState.Controlled

        return VersionControlState.Uncontrolled

    def vcsAllRegisteredStates(self, names, dname, shortcut=True):  # noqa: U100
        """
        Public method used to get the registered states of a number of files
        in the vcs.

        <b>Note:</b> If a shortcut is to be taken, the code will only check,
        if the named directory has been scanned already. If so, it is assumed,
        that the states for all files have been populated by the previous run.

        @param names dictionary with all filenames to be checked as keys
        @type dict
        @param dname directory to check in
        @type str
        @param shortcut flag indicating a shortcut should be taken (unused)
        @type bool
        @return the received dictionary completed with the VCS state or None in
            order to signal an error
        @rtype dict
        """
        if dname.endswith(os.sep):
            dname = dname[:-1]
        dname = os.path.normcase(dname)

        found = False
        for name in self.statusCache:
            if name in names:
                found = True
                names[name] = self.statusCache[name]

        if not found:
            args = self.initCommand("status")
            args.append("--all")
            args.append("--noninteractive")

            output, error = self.__client.runcommand(args)

            if output:
                repoPath = self.getClient().getRepository()
                dirs = [x for x in names if os.path.isdir(x)]
                for line in output.splitlines():
                    if line and line[0] in "MARC!?I":
                        flag, path = line.split(" ", 1)
                        name = os.path.normcase(os.path.join(repoPath, path))
                        dirName = os.path.dirname(name)
                        if name.startswith(dname) and flag not in "?I":
                            if name in names:
                                names[name] = VersionControlState.Controlled
                            if dirName in names:
                                names[dirName] = VersionControlState.Controlled
                            if dirs:
                                for d in dirs[:]:
                                    if name.startswith(d):
                                        names[d] = VersionControlState.Controlled
                                        dirs.remove(d)
                                        break
                        if flag not in "?I":
                            self.statusCache[name] = VersionControlState.Controlled
                            self.statusCache[dirName] = VersionControlState.Controlled
                        else:
                            self.statusCache[name] = VersionControlState.Uncontrolled
                            if dirName not in self.statusCache:
                                self.statusCache[dirName] = (
                                    VersionControlState.Uncontrolled
                                )

        return names

    def clearStatusCache(self):
        """
        Public method to clear the status cache.
        """
        self.statusCache = {}

    def vcsName(self):
        """
        Public method returning the name of the vcs.

        @return always 'Mercurial'
        @rtype str
        """
        return "Mercurial"

    def vcsInitConfig(self, project):
        """
        Public method to initialize the VCS configuration.

        This method ensures, that an ignore file exists.

        @param project reference to the project
        @type Project
        """
        ppath = project.getProjectPath()
        if ppath:
            ignoreName = os.path.join(ppath, Hg.IgnoreFileName)
            if not os.path.exists(ignoreName):
                self.hgCreateIgnoreFile(project.getProjectPath(), autoAdd=True)

    def vcsCleanup(self, name):
        """
        Public method used to cleanup the working directory.

        @param name directory name to be cleaned up
        @type str
        """
        patterns = self.getPlugin().getPreferences("CleanupPatterns").split()

        entries = []
        for pat in patterns:
            entries.extend(FileSystemUtilities.direntries(name, True, pat))

        for entry in entries:
            with contextlib.suppress(OSError):
                os.remove(entry)

    def vcsCommandLine(self, name):
        """
        Public method used to execute arbitrary mercurial commands.

        @param name directory name of the working directory
        @type str
        """
        from .HgCommandDialog import HgCommandDialog

        dlg = HgCommandDialog(self.commandHistory, name, parent=self.__ui)
        if dlg.exec() == QDialog.DialogCode.Accepted:
            command = dlg.getData()
            commandList = Utilities.parseOptionString(command)

            # This moves any previous occurrence of these arguments to the head
            # of the list.
            if command in self.commandHistory:
                self.commandHistory.remove(command)
            self.commandHistory.insert(0, command)

            args = []
            self.addArguments(args, commandList)

            dia = HgDialog(self.tr("Mercurial command"), hg=self, parent=self.__ui)
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def vcsOptionsDialog(
        self, project, _archive, editable=False, parent=None  # noqa: U100
    ):
        """
        Public method to get a dialog to enter repository info.

        @param project reference to the project object
        @type Project
        @param _archive name of the project in the repository (unused)
        @type str
        @param editable flag indicating that the project name is editable (unused)
        @type bool
        @param parent parent widget
        @type QWidget
        @return reference to the instantiated options dialog
        @rtype HgOptionsDialog
        """
        from .HgOptionsDialog import HgOptionsDialog

        return HgOptionsDialog(parent)

    def vcsNewProjectOptionsDialog(self, parent=None):
        """
        Public method to get a dialog to enter repository info for getting a
        new project.

        @param parent parent widget
        @type QWidget
        @return reference to the instantiated options dialog
        @rtype HgNewProjectOptionsDialog
        """
        from .HgNewProjectOptionsDialog import HgNewProjectOptionsDialog

        return HgNewProjectOptionsDialog(self, parent)

    def vcsRepositoryInfos(self, _ppath):
        """
        Public method to retrieve information about the repository.

        @param _ppath local path to get the repository infos (unused)
        @type str
        @return string with ready formated info for display
        @rtype str
        """
        args = self.initCommand("log")
        args.extend(
            [
                "--template",
                "{rev}:{node|short}@@@{tags}@@@{author|xmlescape}@@@"
                "{date|isodate}@@@{branches}@@@{bookmarks}\n",
                "-r",
                "parents()",
            ]
        )

        output, error = self.__client.runcommand(args)

        infoBlock = []
        if output:
            for index, line in enumerate(output.splitlines(), start=1):
                (changeset, tags, author, date, branches, bookmarks) = line.split("@@@")
                cdate, ctime = date.split()[:2]
                info = []
                info.append(
                    QCoreApplication.translate(
                        "mercurial",
                        """<tr><td><b>Parent #{0}</b></td><td></td></tr>\n"""
                        """<tr><td><b>Changeset</b></td><td>{1}</td></tr>""",
                    ).format(index, changeset)
                )
                if tags:
                    info.append(
                        QCoreApplication.translate(
                            "mercurial", """<tr><td><b>Tags</b></td><td>{0}</td></tr>"""
                        ).format("<br/>".join(tags.split()))
                    )
                if bookmarks:
                    info.append(
                        QCoreApplication.translate(
                            "mercurial",
                            """<tr><td><b>Bookmarks</b></td><td>{0}</td></tr>""",
                        ).format("<br/>".join(bookmarks.split()))
                    )
                if branches:
                    info.append(
                        QCoreApplication.translate(
                            "mercurial",
                            """<tr><td><b>Branches</b></td><td>{0}</td></tr>""",
                        ).format("<br/>".join(branches.split()))
                    )
                info.append(
                    QCoreApplication.translate(
                        "mercurial",
                        """<tr><td><b>Last author</b></td><td>{0}</td></tr>\n"""
                        """<tr><td><b>Committed date</b></td><td>{1}</td></tr>\n"""
                        """<tr><td><b>Committed time</b></td><td>{2}</td></tr>""",
                    ).format(author, cdate, ctime)
                )
                infoBlock.append("\n".join(info))
        infoStr = (
            """<tr></tr>{0}""".format("<tr></tr>".join(infoBlock)) if infoBlock else ""
        )

        url = ""
        args = self.initCommand("showconfig")
        args.append("paths.default")

        output, error = self.__client.runcommand(args)
        url = output.splitlines()[0].strip() if output else ""

        return QCoreApplication.translate(
            "mercurial",
            """<h3>Repository information</h3>\n"""
            """<p><table>\n"""
            """<tr><td><b>Mercurial V.</b></td><td>{0}</td></tr>\n"""
            """<tr></tr>\n"""
            """<tr><td><b>URL</b></td><td>{1}</td></tr>\n"""
            """{2}"""
            """</table></p>\n""",
        ).format(self.versionStr, url, infoStr)

    def vcsSupportCommandOptions(self):
        """
        Public method to signal the support of user settable command options.

        @return flag indicating the support  of user settable command options
        @rtype bool
        """
        return False

    ###########################################################################
    ## Private Mercurial specific methods are below.
    ###########################################################################

    def hgNormalizeURL(self, url):
        """
        Public method to normalize a url for Mercurial.

        @param url url string
        @type str
        @return properly normalized url for mercurial
        @rtype str
        """
        url = url.replace("\\", "/")
        if url.endswith("/"):
            url = url[:-1]
        urll = url.split("//")
        return "{0}//{1}".format(urll[0], "/".join(urll[1:]))

    def hgCopy(self, name, project):
        """
        Public method used to copy a file/directory.

        @param name file/directory name to be copied
        @type str
        @param project reference to the project object
        @type Project
        @return flag indicating successful operation
        @rtype bool
        """
        from .HgCopyDialog import HgCopyDialog

        dlg = HgCopyDialog(name, parent=self.__ui)
        res = False
        if dlg.exec() == QDialog.DialogCode.Accepted:
            target, force = dlg.getData()

            args = self.initCommand("copy")
            args.append("-v")
            args.append(name)
            args.append(target)

            dia = HgDialog(
                self.tr("Copying {0}").format(name), hg=self, parent=self.__ui
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()
                res = dia.normalExit()
                if res and target.startswith(project.getProjectPath()):
                    if os.path.isdir(name):
                        project.copyDirectory(name, target)
                    else:
                        project.appendFile(target)
        return res

    def hgGetTagsList(self, withType=False):
        """
        Public method to get the list of tags.

        @param withType flag indicating to get the tag type as well
        @type bool
        @return list of tags or list of tuples of tag name and flag indicating
            a local tag, if withType is True
        @rtype list of str or list of [(str, bool)]
        """
        args = self.initCommand("tags")
        args.append("--verbose")

        output, error = self.__client.runcommand(args)

        tagsList = []
        if output:
            for line in output.splitlines():
                li = line.strip().split()
                if li[-1][0] in "1234567890":
                    # last element is a rev:changeset
                    del li[-1]
                    isLocal = False
                else:
                    del li[-2:]
                    isLocal = True
                name = " ".join(li)
                if name not in ["tip", "default"]:
                    if withType:
                        tagsList.append((name, isLocal))
                    else:
                        tagsList.append(name)

        if withType:
            return tagsList
        else:
            if tagsList:
                self.tagsList = tagsList
            return self.tagsList[:]

    def hgGetBranchesList(self, withState=False, withDefault=False):
        """
        Public method to get the list of branches.

        @param withState flag indicating to include a state indication (defaults to
            False)
        @type bool (optional)
        @param withDefault flag indicating to include the 'default' branch, if that
            is present (defaults to False)
        @type bool (optional)
        @return list of branches with optional state indication ('' for an active
            branch, 'C' for a closed branch or 'I' for an inactive branch)
        @rtype list of str or list of tuple of (str, str)
        """
        args = self.initCommand("branches")
        args.append("--closed")

        output, error = self.__client.runcommand(args)

        if output:
            self.branchesList = []
            for line in output.splitlines():
                li = line.strip().split()
                if li[-1][0] in "1234567890":
                    # last element is a rev:changeset
                    del li[-1]
                    state = ""
                else:
                    state = "C" if li[-1] == "(closed)" else "I"
                    del li[-2:]
                name = " ".join(li)
                if name not in ["tip", "default"] or (
                    name == "default" and withDefault
                ):
                    if withState:
                        self.branchesList.append((name, state))
                    else:
                        self.branchesList.append(name)

        return self.branchesList[:]

    def hgListTagBranch(self, tags=True):
        """
        Public method used to list the available tags or branches.

        @param tags flag indicating listing of branches or tags
            (False = branches, True = tags)
        @type bool
        """
        from .HgTagBranchListDialog import HgTagBranchListDialog

        self.tagbranchList = HgTagBranchListDialog(self)
        self.tagbranchList.show()
        if tags:
            if not self.showedTags:
                self.showedTags = True
                allTagsBranchesList = self.allTagsBranchesList
            else:
                self.tagsList = []
                allTagsBranchesList = None
            self.tagbranchList.start(tags, self.tagsList, allTagsBranchesList)
        else:
            if not self.showedBranches:
                self.showedBranches = True
                allTagsBranchesList = self.allTagsBranchesList
            else:
                self.branchesList = []
                allTagsBranchesList = None
            self.tagbranchList.start(tags, self.branchesList, self.allTagsBranchesList)

    def hgAnnotate(self, name, skiplist=""):
        """
        Public method to show the output of the hg annotate command.

        @param name file name to show the annotations for
        @type str
        @param skiplist name of a skip list file
        @type str
        """
        from .HgAnnotateDialog import HgAnnotateDialog

        if self.annotate is None:
            self.annotate = HgAnnotateDialog(self)
        self.annotate.show()
        self.annotate.raise_()
        self.annotate.start(name, skiplist=skiplist)

    def hgExtendedDiff(self, name):
        """
        Public method used to view the difference of a file/directory to the
        Mercurial repository.

        If name is a directory and is the project directory, all project files
        are saved first. If name is a file (or list of files), which is/are
        being edited and has unsaved modification, they can be saved or the
        operation may be aborted.

        This method gives the chance to enter the revisions to be compared.

        @param name file/directory name to be diffed
        @type str
        """
        from .HgDiffDialog import HgDiffDialog
        from .HgRevisionsSelectionDialog import HgRevisionsSelectionDialog

        names = name[:] if isinstance(name, list) else [name]
        for nam in names:
            if os.path.isfile(nam):
                editor = ericApp().getObject("ViewManager").getOpenEditor(nam)
                if editor and not editor.checkDirty():
                    return
            else:
                project = ericApp().getObject("Project")
                if nam == project.ppath and not project.saveAllScripts():
                    return

        dlg = HgRevisionsSelectionDialog(
            self.hgGetTagsList(),
            self.hgGetBranchesList(),
            bookmarksList=self.hgGetBookmarksList(),
            parent=self.__ui,
        )
        if dlg.exec() == QDialog.DialogCode.Accepted:
            revisions = dlg.getRevisions()
            if self.diff is None:
                self.diff = HgDiffDialog(self)
            self.diff.show()
            self.diff.raise_()
            self.diff.start(name, revisions)

    def __hgGetFileForRevision(self, name, rev=""):
        """
        Private method to get a file for a specific revision from the
        repository.

        @param name file name to get from the repository
        @type str
        @param rev revision to retrieve
        @type str
        @return contents of the file (string) and an error message
        @rtype str
        """
        args = self.initCommand("cat")
        if rev:
            args.append("--rev")
            args.append(rev)
        args.append(name)

        output, error = self.__client.runcommand(args)

        # return file contents with 'universal newlines'
        return output.replace("\r\n", "\n").replace("\r", "\n"), error

    def vcsSbsDiff(self, name, extended=False, revisions=None):
        """
        Public method used to view the difference of a file to the Mercurial
        repository side-by-side.

        @param name file name to be diffed
        @type str
        @param extended flag indicating the extended variant
        @type bool
        @param revisions tuple of two revisions
        @type tuple of (str, str)
        @exception ValueError raised to indicate an invalid name parameter
        """
        from eric7.UI.CompareDialog import CompareDialog

        from .HgRevisionsSelectionDialog import HgRevisionsSelectionDialog

        if isinstance(name, list):
            raise ValueError("Wrong parameter type")

        if extended:
            dlg = HgRevisionsSelectionDialog(
                self.hgGetTagsList(),
                self.hgGetBranchesList(),
                bookmarksList=self.hgGetBookmarksList(),
                parent=self.__ui,
            )
            if dlg.exec() == QDialog.DialogCode.Accepted:
                rev1, rev2 = dlg.getRevisions()
            else:
                return
        elif revisions:
            rev1, rev2 = revisions[0], revisions[1]
        else:
            rev1, rev2 = "", ""

        output1, error = self.__hgGetFileForRevision(name, rev=rev1)
        if error:
            EricMessageBox.critical(
                self.__ui, self.tr("Mercurial Side-by-Side Difference"), error
            )
            return
        name1 = "{0} (rev. {1})".format(name, rev1 and rev1 or ".")

        if rev2:
            output2, error = self.__hgGetFileForRevision(name, rev=rev2)
            if error:
                EricMessageBox.critical(
                    self.__ui, self.tr("Mercurial Side-by-Side Difference"), error
                )
                return
            name2 = "{0} (rev. {1})".format(name, rev2)
        else:
            try:
                with open(name, "r", encoding="utf-8") as f1:
                    output2 = f1.read()
                name2 = "{0} (Work)".format(name)
            except OSError:
                EricMessageBox.critical(
                    self.__ui,
                    self.tr("Mercurial Side-by-Side Difference"),
                    self.tr("""<p>The file <b>{0}</b> could not be read.</p>""").format(
                        name
                    ),
                )
                return

        if self.sbsDiff is None:
            self.sbsDiff = CompareDialog()
        self.sbsDiff.show()
        self.sbsDiff.raise_()
        self.sbsDiff.compare(output1, output2, name1, name2)

    def vcsLogBrowser(self, name=None, isFile=False):
        """
        Public method used to browse the log of a file/directory from the
        Mercurial repository.

        @param name file/directory name to show the log of
        @type str
        @param isFile flag indicating log for a file is to be shown
        @type bool
        """
        from .HgLogBrowserDialog import HgLogBrowserDialog

        if name == self.getClient().getRepository():
            name = None

        if self.logBrowser is None:
            self.logBrowser = HgLogBrowserDialog(self)
        self.logBrowser.show()
        self.logBrowser.raise_()
        self.logBrowser.start(name=name, isFile=isFile)

    def hgIncoming(self):
        """
        Public method used to view the log of incoming changes from the
        Mercurial repository.
        """
        from .HgLogBrowserDialog import HgLogBrowserDialog

        if self.logBrowserIncoming is None:
            self.logBrowserIncoming = HgLogBrowserDialog(self, mode="incoming")
        self.logBrowserIncoming.show()
        self.logBrowserIncoming.raise_()
        self.logBrowserIncoming.start()

    def hgOutgoing(self):
        """
        Public method used to view the log of outgoing changes from the
        Mercurial repository.
        """
        from .HgLogBrowserDialog import HgLogBrowserDialog

        if self.logBrowserOutgoing is None:
            self.logBrowserOutgoing = HgLogBrowserDialog(self, mode="outgoing")
        self.logBrowserOutgoing.show()
        self.logBrowserOutgoing.raise_()
        self.logBrowserOutgoing.start()

    def hgPull(self, revisions=None):
        """
        Public method used to pull changes from a remote Mercurial repository.

        @param revisions list of revisions to be pulled
        @type list of str
        @return flag indicating, that the update contained an add
            or delete
        @rtype bool
        """
        if (
            self.getPlugin().getPreferences("PreferUnbundle")
            and self.bundleFile
            and os.path.exists(self.bundleFile)
            and revisions is None
        ):
            command = "unbundle"
            title = self.tr("Apply changegroups")
        else:
            command = "pull"
            title = self.tr("Pulling from a remote Mercurial repository")

        args = self.initCommand(command)
        args.append("-v")
        if self.getPlugin().getPreferences("PullUpdate"):
            args.append("--update")
        if command == "unbundle":
            args.append(self.bundleFile)
        if revisions:
            for rev in revisions:
                args.append("--rev")
                args.append(rev)

        dia = HgDialog(title, hg=self, parent=self.__ui)
        res = dia.startProcess(args)
        if res:
            dia.exec()
            res = dia.hasAddOrDelete()
        if self.bundleFile and os.path.exists(self.bundleFile):
            os.remove(self.bundleFile)
            self.bundleFile = None
        self.checkVCSStatus()
        return res

    def hgPush(self, force=False, newBranch=False, rev=None):
        """
        Public method used to push changes to a remote Mercurial repository.

        @param force flag indicating a forced push
        @type bool
        @param newBranch flag indicating to push a new branch
        @type bool
        @param rev revision to be pushed (including all ancestors)
        @type str
        """
        args = self.initCommand("push")
        args.append("-v")
        if force:
            args.append("-f")
        if newBranch:
            args.append("--new-branch")
        if rev:
            args.append("--rev")
            args.append(rev)

        dia = HgDialog(
            self.tr("Pushing to a remote Mercurial repository"),
            hg=self,
            parent=self.__ui,
        )
        res = dia.startProcess(args)
        if res:
            dia.exec()
        self.checkVCSStatus()

    def hgInfo(self, mode="heads"):
        """
        Public method to show information about the heads of the repository.

        @param mode mode of the operation (one of 'heads', 'parents', 'tip')
        @type str
        """
        if mode not in ("heads", "parents", "tip"):
            mode = "heads"

        info = []

        args = self.initCommand(mode)
        args.append("--template")
        args.append(
            "{rev}:{node|short}@@@{tags}@@@{author|xmlescape}@@@"
            "{date|isodate}@@@{branches}@@@{parents}@@@{bookmarks}\n"
        )

        output, error = self.__client.runcommand(args)

        if output:
            for index, line in enumerate(output.splitlines(), start=1):
                (
                    changeset,
                    tags,
                    author,
                    date,
                    branches,
                    parents,
                    bookmarks,
                ) = line.split("@@@")
                cdate, ctime = date.split()[:2]
                info.append("""<p><table>""")
                if mode == "heads":
                    info.append(
                        QCoreApplication.translate(
                            "mercurial",
                            """<tr><td><b>Head #{0}</b></td><td></td></tr>\n""",
                        ).format(index)
                    )
                elif mode == "parents":
                    info.append(
                        QCoreApplication.translate(
                            "mercurial",
                            """<tr><td><b>Parent #{0}</b></td><td></td></tr>\n""",
                        ).format(index)
                    )
                elif mode == "tip":
                    info.append(
                        QCoreApplication.translate(
                            "mercurial", """<tr><td><b>Tip</b></td><td></td></tr>\n"""
                        )
                    )
                info.append(
                    QCoreApplication.translate(
                        "mercurial",
                        """<tr><td><b>Changeset</b></td><td>{0}</td></tr>""",
                    ).format(changeset)
                )
                if tags:
                    info.append(
                        QCoreApplication.translate(
                            "mercurial", """<tr><td><b>Tags</b></td><td>{0}</td></tr>"""
                        ).format("<br/>".join(tags.split()))
                    )
                if bookmarks:
                    info.append(
                        QCoreApplication.translate(
                            "mercurial",
                            """<tr><td><b>Bookmarks</b></td><td>{0}</td></tr>""",
                        ).format("<br/>".join(bookmarks.split()))
                    )
                if branches:
                    info.append(
                        QCoreApplication.translate(
                            "mercurial",
                            """<tr><td><b>Branches</b></td><td>{0}</td></tr>""",
                        ).format("<br/>".join(branches.split()))
                    )
                if parents:
                    info.append(
                        QCoreApplication.translate(
                            "mercurial",
                            """<tr><td><b>Parents</b></td><td>{0}</td></tr>""",
                        ).format("<br/>".join(parents.split()))
                    )
                info.append(
                    QCoreApplication.translate(
                        "mercurial",
                        """<tr><td><b>Last author</b></td><td>{0}</td></tr>\n"""
                        """<tr><td><b>Committed date</b></td><td>{1}</td></tr>\n"""
                        """<tr><td><b>Committed time</b></td><td>{2}</td></tr>\n"""
                        """</table></p>""",
                    ).format(author, cdate, ctime)
                )

            dlg = VcsRepositoryInfoDialog(self.__ui, "\n".join(info))
            dlg.exec()

    def hgConflicts(self):
        """
        Public method used to show a list of files containing conflicts.
        """
        from .HgConflictsListDialog import HgConflictsListDialog

        if self.conflictsDlg is None:
            self.conflictsDlg = HgConflictsListDialog(self)
        self.conflictsDlg.show()
        self.conflictsDlg.raise_()
        self.conflictsDlg.start()

    def vcsResolved(self, name, unresolve=False):
        """
        Public method used to resolve conflicts of a file/directory.

        @param name file/directory name to be resolved
        @type str
        @param unresolve flag indicating to mark the file/directory as
            unresolved
        @type bool
        """
        args = self.initCommand("resolve")
        if unresolve:
            args.append("--unmark")
        else:
            args.append("--mark")

        if isinstance(name, list):
            self.addArguments(args, name)
        else:
            args.append(name)

        title = (
            self.tr("Marking as 'unresolved'")
            if unresolve
            else self.tr("Marking as 'resolved'")
        )
        dia = HgDialog(title, hg=self, parent=self.__ui)
        res = dia.startProcess(args)
        if res:
            dia.exec()
        self.checkVCSStatus()

    def hgAbortMerge(self):
        """
        Public method to abort an uncommitted merge.

        @return flag indicating, that the abortion contained an add or delete
        @rtype bool
        """
        if self.version >= (4, 5, 0):
            args = self.initCommand("merge")
            args.append("--abort")
        else:
            args = self.initCommand("update")
            args.append("--clean")

        dia = HgDialog(self.tr("Aborting uncommitted merge"), hg=self, parent=self.__ui)
        res = dia.startProcess(args, showArgs=False)
        if res:
            dia.exec()
            res = dia.hasAddOrDelete()
        self.checkVCSStatus()
        return res

    def hgBranch(self):
        """
        Public method used to create a branch in the Mercurial repository.
        """
        from .HgBranchInputDialog import HgBranchInputDialog

        dlg = HgBranchInputDialog(self.hgGetBranchesList(), parent=self.__ui)
        if dlg.exec() == QDialog.DialogCode.Accepted:
            name, commit, force = dlg.getData()
            name = name.strip().replace(" ", "_")
            args = self.initCommand("branch")
            if force:
                args.append("--force")
            args.append(name)

            dia = HgDialog(
                self.tr("Creating branch in the Mercurial repository"),
                hg=self,
                parent=self.__ui,
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()
                if commit:
                    project = ericApp().getObject("Project")
                    self.vcsCommit(
                        project.getProjectPath(),
                        self.tr("Created new branch <{0}>.").format(name),
                    )

    def hgShowBranch(self):
        """
        Public method used to show the current branch of the working directory.
        """
        args = self.initCommand("branch")

        dia = HgDialog(self.tr("Showing current branch"), hg=self, parent=self.__ui)
        res = dia.startProcess(args, showArgs=False)
        if res:
            dia.exec()

    def hgGetCurrentBranch(self):
        """
        Public method to get the current branch of the working directory.

        @return name of the current branch
        @rtype str
        """
        args = self.initCommand("branch")

        output, error = self.__client.runcommand(args)

        return output.strip()

    def hgEditUserConfig(self):
        """
        Public method used to edit the user configuration file.
        """
        from .HgUserConfigDialog import HgUserConfigDialog

        dlg = HgUserConfigDialog(version=self.version, parent=self.__ui)
        dlg.exec()

    def hgEditConfig(self, repoName=None, withLargefiles=True, largefilesData=None):
        """
        Public method used to edit the repository configuration file.

        @param repoName directory name containing the repository
        @type str
        @param withLargefiles flag indicating to configure the largefiles
            section
        @type bool
        @param largefilesData dictionary with data for the largefiles
            section of the data dialog
        @type dict
        """
        from .HgRepoConfigDataDialog import HgRepoConfigDataDialog

        if repoName is None:
            repoName = self.getClient().getRepository()

        cfgFile = os.path.join(repoName, self.adminDir, "hgrc")
        if not os.path.exists(cfgFile):
            # open dialog to enter the initial data
            withLargefiles = self.isExtensionActive("largefiles") and withLargefiles
            dlg = HgRepoConfigDataDialog(
                withLargefiles=withLargefiles,
                largefilesData=largefilesData,
                parent=self.__ui,
            )
            if dlg.exec() == QDialog.DialogCode.Accepted:
                createContents = True
                defaultUrl, defaultPushUrl = dlg.getData()
                if withLargefiles:
                    lfMinSize, lfPattern = dlg.getLargefilesData()
            else:
                createContents = False
            with contextlib.suppress(OSError):
                with open(cfgFile, "w") as cfg:
                    if createContents:
                        # write the data entered
                        cfg.write("[paths]\n")
                        if defaultUrl:
                            cfg.write("default = {0}\n".format(defaultUrl))
                        if defaultPushUrl:
                            cfg.write("default-push = {0}\n".format(defaultPushUrl))
                        if withLargefiles and (lfMinSize, lfPattern) != (None, None):
                            cfg.write("\n[largefiles]\n")
                            if lfMinSize is not None:
                                cfg.write("minsize = {0}\n".format(lfMinSize))
                            if lfPattern is not None:
                                cfg.write("patterns =\n")
                                cfg.write("  {0}\n".format("\n  ".join(lfPattern)))
                self.__monitorRepoConfigFiles(repoName)
                self.__iniFileChanged(cfgFile)
        self.repoEditor = MiniEditor(cfgFile, "Properties")
        self.repoEditor.show()

    def hgVerify(self):
        """
        Public method to verify the integrity of the repository.
        """
        args = self.initCommand("verify")

        dia = HgDialog(
            self.tr("Verifying the integrity of the Mercurial repository"),
            hg=self,
            parent=self.__ui,
        )
        res = dia.startProcess(args)
        if res:
            dia.exec()

    def hgShowConfig(self):
        """
        Public method to show the combined configuration.
        """
        args = self.initCommand("showconfig")
        args.append("--untrusted")

        dia = HgDialog(
            self.tr("Showing the combined configuration settings"),
            hg=self,
            parent=self.__ui,
        )
        res = dia.startProcess(args, showArgs=False)
        if res:
            dia.exec()

    def hgShowPaths(self):
        """
        Public method to show the path aliases for remote repositories.
        """
        args = self.initCommand("paths")

        dia = HgDialog(
            self.tr("Showing aliases for remote repositories"),
            hg=self,
            parent=self.__ui,
        )
        res = dia.startProcess(args, showArgs=False)
        if res:
            dia.exec()

    def hgRecover(self):
        """
        Public method to recover an interrupted transaction.
        """
        args = self.initCommand("recover")

        dia = HgDialog(
            self.tr("Recovering from interrupted transaction"),
            hg=self,
            parent=self.__ui,
        )
        res = dia.startProcess(args, showArgs=False)
        if res:
            dia.exec()

    def hgIdentify(self):
        """
        Public method to identify the current working directory.
        """
        args = self.initCommand("identify")

        dia = HgDialog(
            self.tr("Identifying project directory"), hg=self, parent=self.__ui
        )
        res = dia.startProcess(args, showArgs=False)
        if res:
            dia.exec()

    def hgCreateIgnoreFile(self, name, autoAdd=False):
        """
        Public method to create the ignore file.

        @param name directory name to create the ignore file in
        @type str
        @param autoAdd flag indicating to add it automatically
        @type bool
        @return flag indicating success
        @rtype bool
        """
        status = False
        ignorePatterns = [
            "glob:.eric6project",
            "glob:.eric7project",
            "glob:.ropeproject",
            "glob:.jedi",
            "glob:.directory",
            "glob:**.pyc",
            "glob:**.pyo",
            "glob:**.orig",
            "glob:**.bak",
            "glob:**.rej",
            "glob:**~",
            "glob:cur",
            "glob:tmp",
            "glob:__pycache__",
            "glob:__pypackages__",
            "glob:**.DS_Store",
            "glob:.pytest_cache",
            "glob:venv",
            "glob:.venv",
            "glob:env",
            "glob:.env",
        ]

        ignoreName = os.path.join(name, Hg.IgnoreFileName)
        res = (
            EricMessageBox.yesNo(
                self.__ui,
                self.tr("Create .hgignore file"),
                self.tr(
                    """<p>The file <b>{0}</b> exists already."""
                    """ Overwrite it?</p>"""
                ).format(ignoreName),
                icon=EricMessageBox.Warning,
            )
            if os.path.exists(ignoreName)
            else True
        )
        if res:
            try:
                # create a .hgignore file
                with open(ignoreName, "w") as ignore:
                    ignore.write("\n".join(ignorePatterns))
                    ignore.write("\n")
                self.__monitorRepoConfigFiles(name)
                status = True
            except OSError:
                status = False

            if status and autoAdd:
                self.vcsAdd(ignoreName, noDialog=True)
                project = ericApp().getObject("Project")
                project.appendFile(ignoreName)

        return status

    def hgBundle(self, bundleData=None):
        """
        Public method to create a changegroup file.

        @param bundleData dictionary containing the bundle creation information
        @type dict
        """
        from .HgBundleDialog import HgBundleDialog

        if bundleData is None:
            dlg = HgBundleDialog(
                self.hgGetTagsList(),
                self.hgGetBranchesList(),
                self.hgGetBookmarksList(),
                version=self.version,
                parent=self.__ui,
            )
            if dlg.exec() != QDialog.DialogCode.Accepted:
                return

            revs, baseRevs, compression, bundleAll = dlg.getParameters()
        else:
            revs = bundleData["revs"]
            if bundleData["base"]:
                baseRevs = [bundleData["base"]]
            else:
                baseRevs = []
            compression = ""
            bundleAll = bundleData["all"]

        fname, selectedFilter = EricFileDialog.getSaveFileNameAndFilter(
            None,
            self.tr("Create changegroup"),
            self.__lastChangeGroupPath,
            self.tr("Mercurial Changegroup Files (*.hg)"),
            None,
            EricFileDialog.DontConfirmOverwrite,
        )

        if not fname:
            return  # user aborted

        fpath = pathlib.Path(fname)
        if not fpath.suffix:
            ex = selectedFilter.split("(*")[1].split(")")[0]
            if ex:
                fpath = fpath.with_suffix(ex)
        if fpath.exists():
            res = EricMessageBox.yesNo(
                self.__ui,
                self.tr("Create changegroup"),
                self.tr(
                    "<p>The Mercurial changegroup file <b>{0}</b> "
                    "already exists. Overwrite it?</p>"
                ).format(fpath),
                icon=EricMessageBox.Warning,
            )
            if not res:
                return

        self.__lastChangeGroupPath = str(fpath.parent)

        args = self.initCommand("bundle")
        if bundleAll:
            args.append("--all")
        for rev in revs:
            args.append("--rev")
            args.append(rev)
        for baseRev in baseRevs:
            args.append("--base")
            args.append(baseRev)
        if compression:
            args.append("--type")
            args.append(compression)
        args.append(str(fpath))

        dia = HgDialog(self.tr("Create changegroup"), hg=self, parent=self.__ui)
        res = dia.startProcess(args)
        if res:
            dia.exec()

    def hgPreviewBundle(self):
        """
        Public method used to view the log of incoming changes from a
        changegroup file.
        """
        from .HgLogBrowserDialog import HgLogBrowserDialog

        file = EricFileDialog.getOpenFileName(
            None,
            self.tr("Preview changegroup"),
            self.__lastChangeGroupPath,
            self.tr("Mercurial Changegroup Files (*.hg);;All Files (*)"),
        )
        if file:
            self.__lastChangeGroupPath = os.path.dirname(file)

            if self.logBrowserIncoming is None:
                self.logBrowserIncoming = HgLogBrowserDialog(self, mode="incoming")
            self.logBrowserIncoming.show()
            self.logBrowserIncoming.raise_()
            self.logBrowserIncoming.start(bundle=file)

    def hgUnbundle(self, files=None):
        """
        Public method to apply changegroup files.

        @param files list of bundle files to be applied
        @type list of str
        @return flag indicating, that the update contained an add
            or delete
        @rtype bool
        """
        res = False
        if not files:
            files = EricFileDialog.getOpenFileNames(
                None,
                self.tr("Apply changegroups"),
                self.__lastChangeGroupPath,
                self.tr("Mercurial Changegroup Files (*.hg);;All Files (*)"),
            )

        if files:
            self.__lastChangeGroupPath = os.path.dirname(files[0])

            update = EricMessageBox.yesNo(
                self.__ui,
                self.tr("Apply changegroups"),
                self.tr("""Shall the working directory be updated?"""),
                yesDefault=True,
            )

            args = self.initCommand("unbundle")
            if update:
                args.append("--update")
                args.append("--verbose")
            args.extend(files)

            dia = HgDialog(self.tr("Apply changegroups"), hg=self, parent=self.__ui)
            res = dia.startProcess(args)
            if res:
                dia.exec()
                res = dia.hasAddOrDelete()
            self.checkVCSStatus()

        return res

    def hgBisect(self, subcommand):
        """
        Public method to perform bisect commands.

        @param subcommand name of the subcommand (one of 'good', 'bad',
            'skip' or 'reset')
        @type str
        @exception ValueError raised to indicate an invalid bisect subcommand
        """
        from .HgRevisionSelectionDialog import HgRevisionSelectionDialog

        if subcommand not in ("good", "bad", "skip", "reset"):
            raise ValueError(
                self.tr("Bisect subcommand ({0}) invalid.").format(subcommand)
            )

        rev = ""
        if subcommand in ("good", "bad", "skip"):
            dlg = HgRevisionSelectionDialog(
                self.hgGetTagsList(),
                self.hgGetBranchesList(),
                bookmarksList=self.hgGetBookmarksList(),
                parent=self.__ui,
            )
            if dlg.exec() == QDialog.DialogCode.Accepted:
                rev = dlg.getRevision()
            else:
                return

        args = self.initCommand("bisect")
        args.append("--{0}".format(subcommand))
        if rev:
            args.append(rev)

        dia = HgDialog(
            self.tr("Mercurial Bisect ({0})").format(subcommand),
            hg=self,
            parent=self.__ui,
        )
        res = dia.startProcess(args)
        if res:
            dia.exec()

    def vcsForget(self, name):
        """
        Public method used to remove a file from the Mercurial repository.

        This will not remove the file from the project directory.

        @param name file/directory name to be removed
        @type str or list of str
        """
        args = self.initCommand("forget")
        args.append("-v")

        if isinstance(name, list):
            self.addArguments(args, name)
        else:
            args.append(name)

        dia = HgDialog(
            self.tr("Removing files from the Mercurial repository only"),
            hg=self,
            parent=self.__ui,
        )
        res = dia.startProcess(args)
        if res:
            dia.exec()
            if isinstance(name, list):
                self.__forgotNames.extend(name)
            else:
                self.__forgotNames.append(name)

    def hgBackout(self):
        """
        Public method used to backout an earlier changeset from the Mercurial
        repository.
        """
        from .HgBackoutDialog import HgBackoutDialog

        dlg = HgBackoutDialog(
            self.hgGetTagsList(),
            self.hgGetBranchesList(),
            self.hgGetBookmarksList(),
            parent=self.__ui,
        )
        if dlg.exec() == QDialog.DialogCode.Accepted:
            rev, merge, date, user, message = dlg.getParameters()
            if not rev:
                EricMessageBox.warning(
                    self.__ui,
                    self.tr("Backing out changeset"),
                    self.tr("""No revision given. Aborting..."""),
                )
                return

            args = self.initCommand("backout")
            args.append("-v")
            if merge:
                args.append("--merge")
            if date:
                args.append("--date")
                args.append(date)
            if user:
                args.append("--user")
                args.append(user)
            args.append("--message")
            args.append(message)
            args.append(rev)

            dia = HgDialog(self.tr("Backing out changeset"), hg=self, parent=self.__ui)
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def hgRollback(self):
        """
        Public method used to rollback the last transaction.
        """
        res = EricMessageBox.yesNo(
            None,
            self.tr("Rollback last transaction"),
            self.tr("""Are you sure you want to rollback the last transaction?"""),
            icon=EricMessageBox.Warning,
        )
        if res:
            dia = HgDialog(
                self.tr("Rollback last transaction"), hg=self, parent=self.__ui
            )
            res = dia.startProcess(["rollback"])
            if res:
                dia.exec()

    def hgServe(self, repoPath):
        """
        Public method used to serve the project.

        @param repoPath directory containing the repository
        @type str
        """
        from .HgServeDialog import HgServeDialog

        self.serveDlg = HgServeDialog(self, repoPath)
        self.serveDlg.show()

    def hgImport(self):
        """
        Public method to import a patch file.

        @return flag indicating, that the import contained an add, a delete
            or a change to the project file
        @rtype bool
        """
        from .HgImportDialog import HgImportDialog

        dlg = HgImportDialog(self, parent=self.__ui)
        if dlg.exec() == QDialog.DialogCode.Accepted:
            (
                patchFile,
                noCommit,
                message,
                date,
                user,
                withSecret,
                stripCount,
                force,
            ) = dlg.getParameters()

            args = self.initCommand("import")
            args.append("--verbose")
            if noCommit:
                args.append("--no-commit")
            else:
                if message:
                    args.append("--message")
                    args.append(message)
                if date:
                    args.append("--date")
                    args.append(date)
                if user:
                    args.append("--user")
                    args.append(user)
            if stripCount != 1:
                args.append("--strip")
                args.append(str(stripCount))
            if force:
                args.append("--force")
            if withSecret:
                args.append("--secret")
            args.append(patchFile)

            dia = HgDialog(self.tr("Import Patch"), hg=self, parent=self.__ui)
            res = dia.startProcess(args)
            if res:
                dia.exec()
                res = dia.hasAddOrDelete()
            self.checkVCSStatus()
        else:
            res = False

        return res

    def hgExport(self):
        """
        Public method to export patches to files.
        """
        from .HgExportDialog import HgExportDialog

        dlg = HgExportDialog(
            self.hgGetBookmarksList(), self.version >= (4, 7, 0), parent=self.__ui
        )
        if dlg.exec() == QDialog.DialogCode.Accepted:
            (
                filePattern,
                revisions,
                bookmark,
                switchParent,
                allText,
                noDates,
                git,
            ) = dlg.getParameters()

            args = self.initCommand("export")
            args.append("--output")
            args.append(filePattern)
            args.append("--verbose")
            if switchParent:
                args.append("--switch-parent")
            if allText:
                args.append("--text")
            if noDates:
                args.append("--nodates")
            if git:
                args.append("--git")
            if bookmark:
                args.append("--bookmark")
                args.append(bookmark)
            else:
                for rev in revisions:
                    args.append(rev)

            dia = HgDialog(self.tr("Export Patches"), hg=self, parent=self.__ui)
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def hgPhase(self, data=None):
        """
        Public method to change the phase of revisions.

        @param data tuple giving phase data (list of revisions, phase, flag
            indicating a forced operation)
        @type tuple of (list of str, str, bool)
        @return flag indicating success
        @rtype bool
        @exception ValueError raised to indicate an invalid phase
        """
        from .HgPhaseDialog import HgPhaseDialog

        if data is None:
            dlg = HgPhaseDialog(parent=self.__ui)
            if dlg.exec() == QDialog.DialogCode.Accepted:
                data = dlg.getData()

        if data:
            revs, phase, force = data

            if phase not in ("p", "d", "s"):
                raise ValueError("Invalid phase given.")

            args = self.initCommand("phase")
            if phase == "p":
                args.append("--public")
            elif phase == "d":
                args.append("--draft")
            else:
                args.append("--secret")

            if force:
                args.append("--force")
            for rev in revs:
                args.append(rev)

            dia = HgDialog(self.tr("Change Phase"), hg=self, parent=self.__ui)
            res = dia.startProcess(args)
            if res:
                dia.exec()
                res = dia.normalExitWithoutErrors()
        else:
            res = False

        return res

    def hgGraft(self, revs=None):
        """
        Public method to copy changesets from another branch.

        @param revs list of revisions to show in the revisions pane
        @type list of str
        @return flag indicating that the project should be reread
        @rtype bool
        """
        from .HgGraftDialog import HgGraftDialog

        res = False
        dlg = HgGraftDialog(self, revs, parent=self.__ui)
        if dlg.exec() == QDialog.DialogCode.Accepted:
            (
                revs,
                (userData, currentUser, userName),
                (dateData, currentDate, dateStr),
                log,
                dryrun,
                noCommit,
            ) = dlg.getData()

            args = self.initCommand("graft")
            args.append("--verbose")
            if userData:
                if currentUser:
                    args.append("--currentuser")
                else:
                    args.append("--user")
                    args.append(userName)
            if dateData:
                if currentDate:
                    args.append("--currentdate")
                else:
                    args.append("--date")
                    args.append(dateStr)
            if log:
                args.append("--log")
            if dryrun:
                args.append("--dry-run")
            if noCommit:
                args.append("--no-commit")
            args.extend(revs)

            dia = HgDialog(self.tr("Copy Changesets"), hg=self, parent=self.__ui)
            res = dia.startProcess(args)
            if res:
                dia.exec()
                res = dia.hasAddOrDelete()
                self.checkVCSStatus()
        return res

    def __hgGraftSubCommand(self, subcommand, title):
        """
        Private method to perform a Mercurial graft subcommand.

        @param subcommand subcommand flag
        @type str
        @param title tirle of the dialog
        @type str
        @return flag indicating that the project should be reread
        @rtype bool
        """
        args = self.initCommand("graft")
        args.append(subcommand)
        args.append("--verbose")

        dia = HgDialog(title, hg=self, parent=self.__ui)
        res = dia.startProcess(args)
        if res:
            dia.exec()
            res = dia.hasAddOrDelete()
            self.checkVCSStatus()
        return res

    def hgGraftContinue(self):
        """
        Public method to continue copying changesets from another branch.

        @return flag indicating that the project should be reread
        @rtype bool
        """
        return self.__hgGraftSubCommand(
            "--continue", self.tr("Copy Changesets (Continue)")
        )

    def hgGraftStop(self):
        """
        Public method to stop an interrupted copying session.

        @return flag indicating that the project should be reread
        @rtype bool
        """
        return self.__hgGraftSubCommand("--stop", self.tr("Copy Changesets (Stop)"))

    def hgGraftAbort(self):
        """
        Public method to abort an interrupted copying session and perform
        a rollback.

        @return flag indicating that the project should be reread
        @rtype bool
        """
        return self.__hgGraftSubCommand("--abort", self.tr("Copy Changesets (Abort)"))

    def hgArchive(self):
        """
        Public method to create an unversioned archive from the repository.
        """
        from .HgArchiveDialog import HgArchiveDialog

        dlg = HgArchiveDialog(self, parent=self.__ui)
        if dlg.exec() == QDialog.DialogCode.Accepted:
            archive, type_, prefix, subrepos = dlg.getData()

            args = self.initCommand("archive")
            if type_:
                args.append("--type")
                args.append(type_)
            if prefix:
                args.append("--prefix")
                args.append(prefix)
            if subrepos:
                args.append("--subrepos")
            args.append(archive)

            dia = HgDialog(
                self.tr("Create Unversioned Archive"), hg=self, parent=self.__ui
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def hgDeleteBackups(self):
        """
        Public method to delete all backup bundles in the backup area.
        """
        backupdir = os.path.join(
            self.getClient().getRepository(), self.adminDir, "strip-backup"
        )
        yes = EricMessageBox.yesNo(
            self.__ui,
            self.tr("Delete All Backups"),
            self.tr(
                """<p>Do you really want to delete all backup bundles"""
                """ stored in the backup area?<br/><b>{0}</b></p>"""
            ).format(backupdir),
        )
        if yes:
            shutil.rmtree(backupdir, ignore_errors=True)

    ###########################################################################
    ## Methods to deal with sub-repositories are below.
    ###########################################################################

    def getHgSubPath(self):
        """
        Public method to get the path to the .hgsub file containing the
        definitions of sub-repositories.

        @return full path of the .hgsub file
        @rtype str
        """
        ppath = self.__projectHelper.getProject().getProjectPath()
        return os.path.join(ppath, ".hgsub")

    def hasSubrepositories(self):
        """
        Public method to check, if the project might have sub-repositories.

        @return flag indicating the existence of sub-repositories
        @rtype bool
        """
        hgsub = self.getHgSubPath()
        return os.path.isfile(hgsub) and os.stat(hgsub).st_size > 0

    def hgAddSubrepository(self):
        """
        Public method to add a sub-repository.
        """
        from .HgAddSubrepositoryDialog import HgAddSubrepositoryDialog

        ppath = self.__projectHelper.getProject().getProjectPath()
        hgsub = self.getHgSubPath()
        dlg = HgAddSubrepositoryDialog(ppath, parent=self.__ui)
        if dlg.exec() == QDialog.DialogCode.Accepted:
            relPath, subrepoType, subrepoUrl = dlg.getData()
            if subrepoType == "hg":
                url = subrepoUrl
            else:
                url = "[{0}]{1}".format(subrepoType, subrepoUrl)
            entry = "{0} = {1}\n".format(relPath, url)

            contents = []
            if os.path.isfile(hgsub):
                # file exists; check, if such an entry exists already
                needsAdd = False
                try:
                    with open(hgsub, "r") as f:
                        contents = f.readlines()
                except OSError as err:
                    EricMessageBox.critical(
                        self.__ui,
                        self.tr("Add Sub-repository"),
                        self.tr(
                            """<p>The sub-repositories file .hgsub could not"""
                            """ be read.</p><p>Reason: {0}</p>"""
                        ).format(str(err)),
                    )
                    return

                if entry in contents:
                    EricMessageBox.critical(
                        self.__ui,
                        self.tr("Add Sub-repository"),
                        self.tr(
                            """<p>The sub-repositories file .hgsub already"""
                            """ contains an entry <b>{0}</b>."""
                            """ Aborting...</p>"""
                        ).format(entry),
                    )
                    return
            else:
                needsAdd = True

            if contents and not contents[-1].endswith("\n"):
                contents[-1] = contents[-1] + "\n"
            contents.append(entry)
            try:
                with open(hgsub, "w") as f:
                    f.writelines(contents)
            except OSError as err:
                EricMessageBox.critical(
                    self.__ui,
                    self.tr("Add Sub-repository"),
                    self.tr(
                        """<p>The sub-repositories file .hgsub could not"""
                        """ be written to.</p><p>Reason: {0}</p>"""
                    ).format(str(err)),
                )
                return

            if needsAdd:
                self.vcsAdd(hgsub)
                self.__projectHelper.getProject().appendFile(hgsub)

    def hgRemoveSubrepositories(self):
        """
        Public method to remove sub-repositories.
        """
        from .HgRemoveSubrepositoriesDialog import HgRemoveSubrepositoriesDialog

        hgsub = self.getHgSubPath()

        subrepositories = []
        if not os.path.isfile(hgsub):
            EricMessageBox.critical(
                self.__ui,
                self.tr("Remove Sub-repositories"),
                self.tr(
                    """<p>The sub-repositories file .hgsub does not"""
                    """ exist. Aborting...</p>"""
                ),
            )
            return

        try:
            with open(hgsub, "r") as f:
                subrepositories = [line.strip() for line in f.readlines()]
        except OSError as err:
            EricMessageBox.critical(
                self.__ui,
                self.tr("Remove Sub-repositories"),
                self.tr(
                    """<p>The sub-repositories file .hgsub could not"""
                    """ be read.</p><p>Reason: {0}</p>"""
                ).format(str(err)),
            )
            return

        dlg = HgRemoveSubrepositoriesDialog(subrepositories, parent=self.__ui)
        if dlg.exec() == QDialog.DialogCode.Accepted:
            subrepositories, removedSubrepos, deleteSubrepos = dlg.getData()
            contents = "\n".join(subrepositories) + "\n"
            try:
                with open(hgsub, "w") as f:
                    f.write(contents)
            except OSError as err:
                EricMessageBox.critical(
                    self.__ui,
                    self.tr("Remove Sub-repositories"),
                    self.tr(
                        """<p>The sub-repositories file .hgsub could not"""
                        """ be written to.</p><p>Reason: {0}</p>"""
                    ).format(str(err)),
                )
                return

            if deleteSubrepos:
                ppath = self.__projectHelper.getProject().getProjectPath()
                for removedSubrepo in removedSubrepos:
                    subrepoPath = removedSubrepo.split("=", 1)[0].strip()
                    subrepoAbsPath = os.path.join(ppath, subrepoPath)
                    shutil.rmtree(subrepoAbsPath, ignore_errors=True)

    ###########################################################################
    ## Methods to handle configuration dependent stuff are below.
    ###########################################################################

    def __checkDefaults(self):
        """
        Private method to check, if the default and default-push URLs
        have been configured.
        """
        args = self.initCommand("showconfig")
        args.append("paths")

        output, error = self.__client.runcommand(args)

        self.__defaultConfigured = False
        self.__defaultPushConfigured = False
        if output:
            for line in output.splitlines():
                line = line.strip()
                if line.startswith("paths.default=") and not line.endswith("="):
                    self.__defaultConfigured = True
                if line.startswith("paths.default-push=") and not line.endswith("="):
                    self.__defaultPushConfigured = True

    def canCommitMerge(self):
        """
        Public method to check, if the working directory is an uncommitted
        merge.

        @return flag indicating commit merge capability
        @rtype bool
        """
        args = self.initCommand("identify")

        output, error = self.__client.runcommand(args)

        return output.count("+") == 2

    def canPull(self):
        """
        Public method to check, if pull is possible.

        @return flag indicating pull capability
        @rtype bool
        """
        return self.__defaultConfigured

    def canPush(self):
        """
        Public method to check, if push is possible.

        @return flag indicating push capability
        @rtype bool
        """
        return self.__defaultPushConfigured or self.__defaultConfigured

    def __iniFileChanged(self, path):
        """
        Private slot to handle a change of the Mercurial configuration file.

        @param path name of the changed file
        @type str
        """
        if (
            path in (self.__cfgFile, self.__repoIniFile, self.__ignoreFile)
            and not self.__iniFileChangedFlag
        ):
            self.__iniFileChangedFlag = True
            if self.__client:
                ok, err = self.__client.restartServer()
                if not ok:
                    EricMessageBox.warning(
                        None,
                        self.tr("Mercurial Command Server"),
                        self.tr(
                            """<p>The Mercurial Command Server could not be"""
                            """ restarted.</p><p>Reason: {0}</p>"""
                        ).format(err),
                    )

            self.restartStatusMonitor(self.__projectHelper.getProject())

            self.__getExtensionsInfo()

            if self.__repoIniFile and path == self.__repoIniFile:
                self.__checkDefaults()

            self.iniFileChanged.emit()

            self.__iniFileChangedFlag = False

    def __monitorRepoConfigFiles(self, repodir):
        """
        Private slot to add some repository configuration files to the list of
        monitored files.

        @param repodir directory name of the repository
        @type str
        """
        watcher = EricFileSystemWatcher.instance()

        cfgFile = os.path.join(repodir, self.adminDir, "hgrc")
        if os.path.exists(cfgFile):
            watcher.addPath(cfgFile)
            self.__repoIniFile = cfgFile
            self.__checkDefaults()

        ignoreFile = os.path.join(repodir, Hg.IgnoreFileName)
        if os.path.exists(ignoreFile):
            watcher.addPath(ignoreFile)
            self.__ignoreFile = ignoreFile

    ###########################################################################
    ## Methods to handle extensions are below.
    ###########################################################################

    def __getExtensionsInfo(self):
        """
        Private method to get the active extensions from Mercurial.
        """
        activeExtensions = sorted(self.__activeExtensions)
        self.__activeExtensions = []

        args = self.initCommand("showconfig")
        args.append("extensions")

        output, error = self.__client.runcommand(args)

        if output:
            for line in output.splitlines():
                extensionName = line.split("=", 1)[0].strip().split(".")[-1].strip()
                self.__activeExtensions.append(extensionName)
        if self.version < (4, 8, 0) and "closehead" in self.__activeExtensions:
            self.__activeExtensions.remove["closehead"]

        if activeExtensions != sorted(self.__activeExtensions):
            self.activeExtensionsChanged.emit()

    def isExtensionActive(self, extensionName):
        """
        Public method to check, if an extension is active.

        @param extensionName name of the extension to check for
        @type str
        @return flag indicating an active extension
        @rtype bool
        """
        extensionName = extensionName.strip()
        isActive = extensionName in self.__activeExtensions

        return isActive

    def getExtensionObject(self, extensionName):
        """
        Public method to get a reference to an extension object.

        @param extensionName name of the extension
        @type str
        @return reference to the extension object
        @rtype bool
        """
        return self.__extensions[extensionName]

    ###########################################################################
    ## Methods to get the helper objects are below.
    ###########################################################################

    def vcsGetProjectBrowserHelper(self, browser, project, isTranslationsBrowser=False):
        """
        Public method to instantiate a helper object for the different
        project browsers.

        @param browser reference to the project browser object
        @type ProjectBaseBrowser
        @param project reference to the project object
        @type Project
        @param isTranslationsBrowser flag indicating, the helper is requested
            for the translations browser (this needs some special treatment)
        @type bool
        @return the project browser helper object
        @rtype HgProjectBrowserHelper
        """
        from .ProjectBrowserHelper import HgProjectBrowserHelper

        return HgProjectBrowserHelper(self, browser, project, isTranslationsBrowser)

    def vcsGetProjectHelper(self, project):
        """
        Public method to instantiate a helper object for the project.

        @param project reference to the project object
        @type Project
        @return the project helper object
        @rtype HgProjectHelper
        """
        # find the root of the repo
        repodir = project.getProjectPath()
        while repodir and not os.path.isdir(os.path.join(repodir, self.adminDir)):
            repodir = os.path.dirname(repodir)
            if not repodir or os.path.splitdrive(repodir)[1] == os.sep:
                repodir = ""
                break

        self.__projectHelper = self.__plugin.getProjectHelper()
        self.__projectHelper.setObjects(self, project)

        if repodir:
            self.__repoDir = repodir
            self.__createClient(repodir)
            self.__monitorRepoConfigFiles(repodir)

        return self.__projectHelper

    ###########################################################################
    ## Methods to handle the Mercurial command server are below.
    ###########################################################################

    def __createClient(self, repodir=""):
        """
        Private method to create a Mercurial command server client.

        @param repodir path of the local repository
        @type str
        """
        self.stopClient()

        self.__client = HgClient(repodir, "utf-8", self)
        ok, err = self.__client.startServer()
        if not ok:
            EricMessageBox.warning(
                None,
                self.tr("Mercurial Command Server"),
                self.tr(
                    """<p>The Mercurial Command Server could not be"""
                    """ started.</p><p>Reason: {0}</p>"""
                ).format(err),
            )

    def getClient(self):
        """
        Public method to get a reference to the command server interface.

        @return reference to the client
        @rtype HgClient
        """
        if self.__client is None:
            self.__createClient(self.__repoDir)

        return self.__client

    def stopClient(self):
        """
        Public method to stop the command server client.
        """
        if self.__client is not None:
            self.__client.stopServer()
            self.__client = None

    ###########################################################################
    ## Status Monitor Thread methods
    ###########################################################################

    def _createStatusMonitorThread(self, interval, project):
        """
        Protected method to create an instance of the VCS status monitor
        thread.

        @param interval check interval for the monitor thread in seconds
        @type int
        @param project reference to the project object
        @type Project
        @return reference to the monitor thread
        @rtype HgStatusMonitorThread
        """
        from .HgStatusMonitorThread import HgStatusMonitorThread

        return HgStatusMonitorThread(interval, project, self)

    ###########################################################################
    ## Bookmarks methods
    ###########################################################################

    def hgListBookmarks(self):
        """
        Public method used to list the available bookmarks.
        """
        from .HgBookmarksListDialog import HgBookmarksListDialog

        self.bookmarksList = []

        if self.bookmarksListDlg is None:
            self.bookmarksListDlg = HgBookmarksListDialog(self)
        self.bookmarksListDlg.show()
        self.bookmarksListDlg.raise_()
        self.bookmarksListDlg.start(self.bookmarksList)

    def hgGetBookmarksList(self):
        """
        Public method to get the list of bookmarks.

        @return list of bookmarks
        @rtype list of str
        """
        args = self.initCommand("bookmarks")

        client = self.getClient()
        output = client.runcommand(args)[0]

        self.bookmarksList = []
        for line in output.splitlines():
            li = line.strip().split()
            if li[-1][0] in "1234567890":
                # last element is a rev:changeset
                del li[-1]
                if li[0] == "*":
                    del li[0]
                name = " ".join(li)
                self.bookmarksList.append(name)

        return self.bookmarksList[:]

    def hgBookmarkDefine(self, revision=None, bookmark=None):
        """
        Public method to define a bookmark.

        @param revision revision to set bookmark for
        @type str
        @param bookmark name of the bookmark
        @type str
        """
        from .HgBookmarkDialog import HgBookmarkAction, HgBookmarkDialog

        if bool(revision) and bool(bookmark):
            ok = True
        else:
            dlg = HgBookmarkDialog(
                HgBookmarkAction.DEFINE,
                self.hgGetTagsList(),
                self.hgGetBranchesList(),
                self.hgGetBookmarksList(),
                parent=self.__ui,
            )
            if dlg.exec() == QDialog.DialogCode.Accepted:
                revision, bookmark = dlg.getData()
                ok = True
            else:
                ok = False

        if ok:
            args = self.initCommand("bookmarks")
            if revision:
                args.append("--rev")
                args.append(revision)
            args.append(bookmark)

            dia = HgDialog(self.tr("Mercurial Bookmark"), hg=self, parent=self.__ui)
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def hgBookmarkDelete(self, bookmark=None):
        """
        Public method to delete a bookmark.

        @param bookmark name of the bookmark
        @type str
        """
        if bookmark:
            ok = True
        else:
            bookmark, ok = QInputDialog.getItem(
                None,
                self.tr("Delete Bookmark"),
                self.tr("Select the bookmark to be deleted:"),
                [""] + sorted(self.hgGetBookmarksList()),
                0,
                True,
            )
        if ok and bookmark:
            args = self.initCommand("bookmarks")
            args.append("--delete")
            args.append(bookmark)

            dia = HgDialog(
                self.tr("Delete Mercurial Bookmark"), hg=self, parent=self.__ui
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def hgBookmarkRename(self, renameInfo=None):
        """
        Public method to rename a bookmark.

        @param renameInfo old and new names of the bookmark
        @type tuple of str and str
        """
        from .HgBookmarkRenameDialog import HgBookmarkRenameDialog

        if not renameInfo:
            dlg = HgBookmarkRenameDialog(self.hgGetBookmarksList(), parent=self.__ui)
            if dlg.exec() == QDialog.DialogCode.Accepted:
                renameInfo = dlg.getData()

        if renameInfo:
            args = self.initCommand("bookmarks")
            args.append("--rename")
            args.append(renameInfo[0])
            args.append(renameInfo[1])

            dia = HgDialog(
                self.tr("Rename Mercurial Bookmark"), hg=self, parent=self.__ui
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def hgBookmarkMove(self, revision=None, bookmark=None):
        """
        Public method to move a bookmark.

        @param revision revision to set bookmark for
        @type str
        @param bookmark name of the bookmark
        @type str
        """
        from .HgBookmarkDialog import HgBookmarkAction, HgBookmarkDialog

        if bool(revision) and bool(bookmark):
            ok = True
        else:
            dlg = HgBookmarkDialog(
                HgBookmarkAction.MOVE,
                self.hgGetTagsList(),
                self.hgGetBranchesList(),
                self.hgGetBookmarksList(),
                parent=self.__ui,
            )
            if dlg.exec() == QDialog.DialogCode.Accepted:
                revision, bookmark = dlg.getData()
                ok = True
            else:
                ok = False

        if ok:
            args = self.initCommand("bookmarks")
            args.append("--force")
            if revision:
                args.append("--rev")
                args.append(revision)
            args.append(bookmark)

            dia = HgDialog(
                self.tr("Move Mercurial Bookmark"), hg=self, parent=self.__ui
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def hgBookmarkIncoming(self):
        """
        Public method to show a list of incoming bookmarks.
        """
        from .HgBookmarksInOutDialog import (
            HgBookmarksInOutDialog,
            HgBookmarksInOutDialogMode,
        )

        self.bookmarksInOutDlg = HgBookmarksInOutDialog(
            self, HgBookmarksInOutDialogMode.INCOMING
        )
        self.bookmarksInOutDlg.show()
        self.bookmarksInOutDlg.start()

    def hgBookmarkOutgoing(self):
        """
        Public method to show a list of outgoing bookmarks.
        """
        from .HgBookmarksInOutDialog import (
            HgBookmarksInOutDialog,
            HgBookmarksInOutDialogMode,
        )

        self.bookmarksInOutDlg = HgBookmarksInOutDialog(
            self, HgBookmarksInOutDialogMode.OUTGOING
        )
        self.bookmarksInOutDlg.show()
        self.bookmarksInOutDlg.start()

    def __getInOutBookmarks(self, incoming):
        """
        Private method to get the list of incoming or outgoing bookmarks.

        @param incoming flag indicating to get incoming bookmarks
        @type bool
        @return list of bookmarks
        @rtype list of str
        """
        bookmarksList = []

        args = (
            self.initCommand("incoming") if incoming else self.initCommand("outgoing")
        )
        args.append("--bookmarks")

        client = self.getClient()
        output = client.runcommand(args)[0]

        for line in output.splitlines():
            if line.startswith(" "):
                li = line.strip().split()
                del li[-1]
                name = " ".join(li)
                bookmarksList.append(name)

        return bookmarksList

    def hgBookmarkPull(self, current=False, bookmark=None):
        """
        Public method to pull a bookmark from a remote repository.

        @param current flag indicating to pull the current bookmark
        @type bool
        @param bookmark name of the bookmark
        @type str
        """
        if current:
            bookmark = "."
            ok = True
        elif bookmark:
            ok = True
        else:
            bookmarks = self.__getInOutBookmarks(True)
            bookmark, ok = QInputDialog.getItem(
                None,
                self.tr("Pull Bookmark"),
                self.tr("Select the bookmark to be pulled:"),
                [""] + sorted(bookmarks),
                0,
                True,
            )

        if ok and bookmark:
            args = self.initCommand("pull")
            args.append("--bookmark")
            args.append(bookmark)

            dia = HgDialog(
                self.tr("Pulling bookmark from a remote Mercurial repository"),
                hg=self,
                parent=self.__ui,
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()

    def hgBookmarkPush(self, current=False, bookmark=None, allBookmarks=False):
        """
        Public method to push a bookmark to a remote repository.

        @param current flag indicating to push the current bookmark
        @type bool
        @param bookmark name of the bookmark
        @type str
        @param allBookmarks flag indicating to push all bookmarks
        @type bool
        """
        if current:
            bookmark = "."
            ok = True
        elif bookmark or allBookmarks:
            ok = True
        else:
            bookmarks = self.__getInOutBookmarks(False)
            bookmark, ok = QInputDialog.getItem(
                None,
                self.tr("Push Bookmark"),
                self.tr("Select the bookmark to be push:"),
                [""] + sorted(bookmarks),
                0,
                True,
            )

        if ok and (bool(bookmark) or all):
            args = self.initCommand("push")
            if allBookmarks:
                args.append("--all-bookmarks")
            else:
                args.append("--bookmark")
                args.append(bookmark)

            dia = HgDialog(
                self.tr("Pushing bookmark to a remote Mercurial repository"),
                hg=self,
                parent=self.__ui,
            )
            res = dia.startProcess(args)
            if res:
                dia.exec()