CxFreeze/CxfreezeExecDialog.py

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

# Copyright (c) 2010 - 2021 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog to show the output of the packager process.
"""

import shutil
import errno
import fnmatch
import os.path

from PyQt5.QtCore import pyqtSlot, QProcess, QTimer, QThread, pyqtSignal
from PyQt5.QtWidgets import QDialog, QDialogButtonBox, QAbstractButton

from E5Gui import E5MessageBox

from .Ui_CxfreezeExecDialog import Ui_CxfreezeExecDialog

import Preferences


class CxfreezeExecDialog(QDialog, Ui_CxfreezeExecDialog):
    """
    Class implementing a dialog to show the output of the cxfreeze process.
    
    This class starts a QProcess and displays a dialog that
    shows the output of the packager command process.
    """
    def __init__(self, cmdname, parent=None):
        """
        Constructor
        
        @param cmdname name of the packager (string)
        @param parent parent widget of this dialog (QWidget)
        """
        QDialog.__init__(self, parent)
        self.setupUi(self)
        
        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True)
        
        self.process = None
        self.copyProcess = None
        self.cmdname = cmdname
    
    def start(self, args, parms, ppath, mainscript):
        """
        Public slot to start the packager command.
        
        @param args commandline arguments for packager program (list of
            strings)
        @param parms parameters got from the config dialog (dict)
        @param ppath project path (string)
        @param mainscript main script name to be processed by by the packager
            (string)
        @return flag indicating the successful start of the process
        """
        self.errorGroup.hide()
        script = os.path.join(ppath, mainscript)
        dname = os.path.dirname(script)
        script = os.path.basename(script)
        
        self.ppath = ppath
        self.additionalFiles = parms.get('additionalFiles', [])
        self.targetDirectory = os.path.join(
            parms.get('targetDirectory', 'dist'))
        
        self.contents.clear()
        self.errors.clear()
        
        args.append(script)
        
        self.process = QProcess()
        self.process.setWorkingDirectory(dname)
        
        self.process.readyReadStandardOutput.connect(self.__readStdout)
        self.process.readyReadStandardError.connect(self.__readStderr)
        self.process.finished.connect(self.__finishedFreeze)
            
        self.setWindowTitle(self.tr('{0} - {1}').format(
            self.cmdname, script))
        self.contents.insertPlainText(' '.join(args) + '\n\n')
        self.contents.ensureCursorVisible()
        
        program = args.pop(0)
        self.process.start(program, args)
        procStarted = self.process.waitForStarted()
        if not procStarted:
            E5MessageBox.critical(
                self,
                self.tr('Process Generation Error'),
                self.tr(
                    'The process {0} could not be started. '
                    'Ensure, that it is in the search path.'
                ).format(program))
        return procStarted
    
    @pyqtSlot(QAbstractButton)
    def on_buttonBox_clicked(self, button):
        """
        Private slot called by a button of the button box clicked.
        
        @param button button that was clicked (QAbstractButton)
        """
        if button == self.buttonBox.button(QDialogButtonBox.Close):
            self.accept()
        elif button == self.buttonBox.button(QDialogButtonBox.Cancel):
            self.additionalFiles = []   # Skip copying additional files
            self.__finish()
    
    def __finish(self):
        """
        Private slot called when the process finished.
        
        It is called when the process finished or
        the user pressed the cancel button.
        """
        if self.process is not None:
            self.process.disconnect(self.__finishedFreeze)
            self.process.terminate()
            QTimer.singleShot(2000, self.process.kill)
            self.process.waitForFinished(3000)
        self.process = None
        
        if self.copyProcess is not None:
            self.copyProcess.terminate()
        self.copyProcess = None
        
        self.contents.insertPlainText(
            self.tr('\n{0} aborted.\n').format(self.cmdname))
        
        self.__enableButtons()
    
    def __finishedFreeze(self):
        """
        Private slot called when the process finished.
        
        It is called when the process finished or
        the user pressed the cancel button.
        """
        self.process = None

        self.contents.insertPlainText(
            self.tr('\n{0} finished.\n').format(self.cmdname))
        
        self.copyProcess = CopyAdditionalFiles(self)
        self.copyProcess.insertPlainText.connect(self.contents.insertPlainText)
        self.copyProcess.finished.connect(self.__enableButtons)
        self.copyProcess.start()
    
    def __enableButtons(self):
        """
        Private slot called when all processes finished.
        
        It is called when the process finished or
        the user pressed the cancel button.
        """
        self.copyProcess = None
        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(True)
        self.buttonBox.button(QDialogButtonBox.Cancel).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.Close).setDefault(True)
        self.contents.ensureCursorVisible()

    def __readStdout(self):
        """
        Private slot to handle the readyReadStandardOutput signal.
        
        It reads the output of the process, formats it and inserts it into
        the contents pane.
        """
        self.process.setReadChannel(QProcess.StandardOutput)
        
        while self.process.canReadLine():
            s = str(self.process.readAllStandardOutput(),
                    Preferences.getSystem("IOEncoding"),
                    'replace')
            self.contents.insertPlainText(s)
            self.contents.ensureCursorVisible()
    
    def __readStderr(self):
        """
        Private slot to handle the readyReadStandardError signal.
        
        It reads the error output of the process and inserts it into the
        error pane.
        """
        self.process.setReadChannel(QProcess.StandardError)
        
        while self.process.canReadLine():
            self.errorGroup.show()
            s = str(self.process.readAllStandardError(),
                    Preferences.getSystem("IOEncoding"),
                    'replace')
            self.errors.insertPlainText(s)
            self.errors.ensureCursorVisible()


class CopyAdditionalFiles(QThread):
    """
    Thread to copy the distribution dependent files.
    
    @signal insertPlainText(text) emitted to inform user about the copy
        progress
    """
    insertPlainText = pyqtSignal(str)
    
    def __init__(self, main):
        """
        Constructor
        
        @param main self-object of the caller
        """
        super(CopyAdditionalFiles, self).__init__()
        
        self.ppath = main.ppath
        self.additionalFiles = main.additionalFiles
        self.targetDirectory = main.targetDirectory
    
    def __copytree(self, src, dst):
        """
        Private method to copy a file or folder.
       
        Wildcards allowed. Existing files are overwitten.
        
        @param src source file or folder to copy. Wildcards allowed. (str)
        @param dst destination (str)
        @exception OSError raised if there is an issue writing the package
        @exception OSError raised if the given source does not exist
        """                                             # __IGNORE_WARNING__
        def src2dst(srcname, base, dst):
            """
            Combines the relativ path of the source (srcname) with the
            destination folder.
            
            @param srcname actual file or folder to copy
            @param base basename of the source folder
            @param dst basename of the destination folder
            @return destination path
            """
            delta = srcname.split(base)[1]
            return os.path.join(dst, delta[1:])
        
        base, fileOrFolderName = os.path.split(src)
        initDone = False
        for root, dirs, files in os.walk(base):
            copied = False
            # remove all none matching directorynames, create all others
            for directory in dirs[:]:
                pathname = os.path.join(root, directory)
                if initDone or fnmatch.fnmatch(pathname, src):
                    newDir = src2dst(pathname, base, dst)
                    # avoid infinite loop
                    if fnmatch.fnmatch(newDir, src):
                        dirs.remove(directory)
                        continue
                    try:
                        copied = True
                        os.makedirs(newDir)
                    except OSError as err:
                        if err.errno != errno.EEXIST:
                            # it's ok if directory already exists
                            raise err
                else:
                    dirs.remove(directory)
            
            for file in files:
                fn = os.path.join(root, file)
                if initDone or fnmatch.fnmatch(fn, src):
                    newFile = src2dst(fn, base, dst)
                    # copy files, give errors to caller
                    shutil.copy2(fn, newFile)
                    copied = True
            
            # check if file was found and copied
            if len(files) and not copied:
                raise OSError(
                    errno.ENOENT,
                    self.tr("No such file or directory: '{0}'")
                    .format(src))
            
            initDone = True
            
    def run(self):
        """
        Public method to run the thread.
        
        QThread entry point to copy the selected additional files and folders.
        
        @exception OSError raised if there is an issue writing the package
        """     # __IGNORE_WARNING_D252__ __IGNORE_WARNING_D253__
        self.insertPlainText.emit('----\n')
        os.chdir(self.ppath)
        for fn in self.additionalFiles:
            self.insertPlainText.emit(
                self.tr('\nCopying {0}: ').format(fn))
            
            # on linux normpath doesn't replace backslashes to slashes.
            fn = fn.replace('\\', '/')
            fn = os.path.abspath(os.path.normpath(fn))
            dst = os.path.join(self.ppath, self.targetDirectory)
            if fn.startswith(os.path.normpath(self.ppath)):
                dirname = fn.split(self.ppath + os.sep)[1]
                dst = os.path.join(dst, os.path.dirname(dirname))
                try:
                    os.makedirs(dst)
                except OSError as err:
                    if err.errno != errno.EEXIST:
                        # it's ok if directory already exists
                        raise err
            
            try:
                self.__copytree(fn, dst)
                self.insertPlainText.emit(self.tr('ok'))
            except OSError as err:
                self.insertPlainText.emit(
                    self.tr('failed: {0}').format(err.strerror))