Based on slack discussion, pass arguments from launcher to started application

https://swift-project.slack.com/archives/C04J6J76N/p1504449711000040

* utility functions in CApplication and CNetworkVatlib for cmd args
* a.addVatlibOptions() in launcher
* function CSwiftLauncher::startDetached to unify startup and simplify debugging

src/swiftlauncher/main.cpp

@@ -34,6 +34,7 @@ int main(int argc, char *argv[])
     QApplication qa(argc, argv); // needed
     Q_UNUSED(qa);
     CGuiApplication a(CApplicationInfo::swiftLauncher(), CApplicationInfo::Laucher, CIcons::swiftLauncher1024());
+    a.addVatlibOptions(); // so it can be passed to started applications
     a.addParserOption({{"i", "installer"}, QCoreApplication::translate("main", "Installer setup.") });
     if (!a.parseAndStartupCheck()) { return EXIT_FAILURE; }
     a.useWebDataServices(BlackCore::CWebReaderFlags::AllSwiftDbReaders, CDatabaseReaderConfigList::forLauncher());
@@ -49,12 +50,6 @@ int main(int argc, char *argv[])
     CGuiApplication::registerAsRunning(); // needed because own exec is called
     if (launcher.exec() == QDialog::Rejected) { return EXIT_SUCCESS; }
     launcher.close();
-
-    const QString exe(launcher.getExecutable());
-    const QStringList exeArgs(launcher.getExecutableArgs());
-    Q_ASSERT_X(!exe.isEmpty(), Q_FUNC_INFO, "Missing executable");
-    CLogMessage(QCoreApplication::instance()).info(launcher.getCmdLine());
-    QProcess::startDetached(exe, exeArgs);
-
-    return EXIT_SUCCESS;
+    const bool s = launcher.startDetached();
+    return s ? EXIT_SUCCESS : EXIT_FAILURE;
 }

src/swiftlauncher/swiftlauncher.cpp

@@ -81,7 +81,15 @@ CSwiftLauncher::~CSwiftLauncher()
 
 QString CSwiftLauncher::getCmdLine() const
 {
-    return toCmdLine(m_executable, m_executableArgs);
+    return this->toCmdLine(m_executable, m_executableArgs);
+}
+
+bool CSwiftLauncher::startDetached()
+{
+    if (m_executable.isEmpty()) { return false; }
+    const QString cmd = this->getCmdLine();
+    CLogMessage(this).info(cmd);
+    return QProcess::startDetached(m_executable, m_executableArgs);
 }
 
 CEnableForFramelessWindow::WindowMode CSwiftLauncher::getWindowMode() const
@@ -267,26 +275,20 @@ void CSwiftLauncher::startSwiftCore()
         args.append("--coreaudio");
     }
 
-    // I set this for debug purpose only
+    args.append(sGui->inheritedArguments(true));
     m_executableArgs = args;
-    m_executable.clear();
     m_executable = CDirectoryUtils::executableFilePath(CBuildConfig::swiftCoreExecutableName());
-    CLogMessage(this).info(this->getCmdLine());
-
-    // start
-    QProcess::startDetached(m_executable, m_executableArgs);
+    this->startDetached();
 }
 
 void CSwiftLauncher::setSwiftDataExecutable()
 {
-    m_executable.clear();
     m_executable = CDirectoryUtils::executableFilePath(CBuildConfig::swiftDataExecutableName());
-    m_executableArgs.clear();
+    m_executableArgs = sGui->inheritedArguments(false);
 }
 
 bool CSwiftLauncher::setSwiftGuiExecutable()
 {
-    m_executable.clear();
     m_executable = CDirectoryUtils::executableFilePath(CBuildConfig::swiftGuiExecutableName());
 
     QStringList args
@@ -315,6 +317,7 @@ bool CSwiftLauncher::setSwiftGuiExecutable()
             return false;
         }
     }
+    args.append(sGui->inheritedArguments(true));
     m_executableArgs = args;
     return true;
 }
@@ -399,11 +402,8 @@ bool CSwiftLauncher::warnAboutOtherSwiftApplications()
 QString CSwiftLauncher::toCmdLine(const QString &exe, const QStringList &exeArgs)
 {
     if (exeArgs.isEmpty()) { return exe; }
-    QString cmd(exe);
-    for (const QString &a : exeArgs)
-    {
-        cmd = cmd.append(" ").append(a);
-    }
+    const QString exeArgsString = exeArgs.join(' ');
+    const QString cmd(exe + " " + exeArgsString);
     return cmd;
 }
 

src/swiftlauncher/swiftlauncher.h

@@ -67,6 +67,10 @@ public:
     //! Current command line
     QString getCmdLine() const;
 
+    //! Start currently set application detached
+    //! \remark simplifies debugging
+    bool startDetached();
+
 protected:
     //! \copydoc QDialog::mousePressEvent
     virtual void mousePressEvent(QMouseEvent *event) override;