Command line tool - basics

PdfTool/main.cpp

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+//    Copyright (C) 2020 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "pdftoolabstractapplication.h"
+
+#include <QCoreApplication>
+#include <QCommandLineParser>
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication a(argc, argv);
+    QCoreApplication::setOrganizationName("MelkaJ");
+    QCoreApplication::setApplicationName("PdfTool");
+    QCoreApplication::setApplicationVersion("1.0.0");
+
+    QStringList arguments = QCoreApplication::arguments();
+
+    QCommandLineParser parser;
+    parser.setApplicationDescription("PdfTool - work with pdf documents via command line");
+    parser.addPositionalArgument("command", "Command to execute.");
+    parser.parse(arguments);
+
+    QStringList positionalArguments = parser.positionalArguments();
+    QString command = !positionalArguments.isEmpty() ? positionalArguments.front() : QString();
+    arguments.removeOne(command);
+
+    pdftool::PDFToolAbstractApplication* application = pdftool::PDFToolApplicationStorage::getApplicationByCommand(command);
+    if (!application)
+    {
+        application = pdftool::PDFToolApplicationStorage::getDefaultApplication();
+    }
+    else
+    {
+        parser.clearPositionalArguments();
+    }
+
+    application->initializeCommandLineParser(&parser);
+
+    parser.addHelpOption();
+    parser.addVersionOption();
+    parser.process(arguments);
+
+    return application->execute(application->getOptions(&parser));
+}