PyInstaller/PyInstallerExecDialog.py

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

# Copyright (c) 2018 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a dialog to show the output of the pyinstaller/pyi-makespec
process.
"""

from __future__ import unicode_literals
try:
    str = unicode
except NameError:
    pass

import os

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

from E5Gui import E5MessageBox

from .Ui_PyInstallerExecDialog import Ui_PyInstallerExecDialog

import Preferences


class PyInstallerExecDialog(QDialog, Ui_PyInstallerExecDialog):
    """
    Class implementing a dialog to show the output of the
    pyinstaller/pyi-makespec 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
        @type str
        @param parent reference to the parent widget
        @type QWidget
        """
        super(PyInstallerExecDialog, self).__init__(parent)
        self.setupUi(self)
        
        self.buttonBox.button(QDialogButtonBox.Close).setEnabled(False)
        self.buttonBox.button(QDialogButtonBox.Cancel).setDefault(True)
        
        self.__process = None
        self.__cmdname = cmdname    # used for several outputs
    
    def start(self, args, parms, project, script):
        """
        Public slot to start the packager command.
        
        @param args command line arguments for packager program
        @type list of str
        @param parms parameters got from the config dialog
        @type dict
        @param project reference to the project object
        @type Project
        @param script script or spec file name to be processed by by the
            packager
        @type str
        @return flag indicating the successful start of the process
        @rtype bool
        """
        self.__project = project
        
        if not os.path.isabs(script):
            # assume relative paths are relative to the project directory
            script = os.path.join(self.__project.getProjectPath(), script)
        dname = os.path.dirname(script)
        self.__script = os.path.basename(script)
        
        self.contents.clear()
        
        args.append(self.__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.__finishedProcess)
            
        self.setWindowTitle(self.tr('{0} - {1}').format(
            self.__cmdname, script))
        self.contents.insertPlainText("{0} {1}\n\n".format(
            ' '.join(args), os.path.join(dname, self.__script)))
        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
        @type QAbstractButton
        """
        if button == self.buttonBox.button(QDialogButtonBox.Close):
            self.accept()
        elif button == self.buttonBox.button(QDialogButtonBox.Cancel):
            self.__finish()
    
    def __finish(self):
        """
        Private slot called when the process was canceled by the user.
        
        It is called when the process finished or
        the user pressed the cancel button.
        """
        if self.__process is not None:
            self.__process.disconnect(self.__finishedProcess)
            self.__process.terminate()
            QTimer.singleShot(2000, self.__process.kill)
            self.__process.waitForFinished(3000)
        self.__process = None
        
        self.contents.insertPlainText(
            self.tr('\n{0} aborted.\n').format(self.__cmdname))
        
        self.__enableButtons()
    
    def __finishedProcess(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.exitStatus() == QProcess.NormalExit:
            # add the spec file to the project
            self.__project.addToOthers(
                os.path.splitext(self.__script)[0] + ".spec")
        
        self.__process = None

        self.contents.insertPlainText(
            self.tr('\n{0} finished.\n').format(self.__cmdname))
        
        self.__enableButtons()
    
    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.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():
            s = str(self.__process.readAllStandardError(),
                    Preferences.getSystem("IOEncoding"),
                    'replace')
            self.contents.insertPlainText(s)
            self.contents.ensureCursorVisible()