feat(Storybook): allow opening a given page via cmdline

- syntax: `Storybook <page name>`, e.g. `Storybook CountdownPill` opens
up the corresponding page from the file under
`storybook/pages/CountdownPillPage.qml`
- the idea: for example being able to run squish tests against Storybook
(pages)
- also adjusted Makefile, so that it's possible to do the same via
`make`, e.g. `make run-storybook ARGS=CountdownPill`; unknown
options/arguments are ignored

Makefile

@@ -365,7 +365,7 @@ storybook-build: | storybook-configure
 
 run-storybook: storybook-build
 	echo -e "\033[92mRunning:\033[39m Storybook"
-	$(STORYBOOK_BUILD_PATH)/bin/Storybook
+	$(STORYBOOK_BUILD_PATH)/bin/Storybook ${ARGS}
 
 run-storybook-tests: storybook-build
 	echo -e "\033[92mRunning:\033[39m Storybook Tests"

storybook/main.cpp

@@ -41,6 +41,13 @@ int main(int argc, char *argv[])
     QGuiApplication::setOrganizationDomain(QStringLiteral("status.im"));
     QGuiApplication::setApplicationName(QStringLiteral("Status Desktop Storybook"));
 
+    QCommandLineParser cmdParser;
+    cmdParser.addHelpOption();
+    cmdParser.addPositionalArgument(QStringLiteral("page"), QStringLiteral("Open the given page on startup"));
+    if (!cmdParser.parse(app.arguments())) {
+        qWarning() << "Error (ignored) while parsing cmd line arguments:" << cmdParser.errorText();
+    }
+
     qputenv("QT_QUICK_CONTROLS_HOVER_ENABLED", QByteArrayLiteral("1"));
     auto chromiumFlags = qgetenv("QTWEBENGINE_CHROMIUM_FLAGS");
     if(!chromiumFlags.contains("--disable-seccomp-filter-sandbox")) {
@@ -62,8 +69,8 @@ int main(int argc, char *argv[])
     for (const auto& path : additionalImportPaths)
         engine.addImportPath(path);
 
-    engine.rootContext()->setContextProperty(
+    engine.rootContext()->setContextProperty(QStringLiteral("pagesFolder"),
-                "pagesFolder", QML_IMPORT_ROOT + QStringLiteral("/pages"));
+                                             QML_IMPORT_ROOT + QStringLiteral("/pages"));
 
     qmlRegisterType<PagesModelInitialized>("Storybook", 1, 0, "PagesModel");
     qmlRegisterType<SectionsDecoratorModel>("Storybook", 1, 0, "SectionsDecoratorModel");
@@ -117,6 +124,11 @@ int main(int argc, char *argv[])
         if (!obj && url == objUrl)
             QCoreApplication::exit(-1);
     }, Qt::QueuedConnection);
+
+    const auto args = cmdParser.positionalArguments();
+    if (!args.isEmpty())
+        engine.setInitialProperties({{QStringLiteral("currentPage"), args.constFirst()}});
+
     engine.load(url);
 
     return QGuiApplication::exec();

storybook/main.qml

@@ -26,7 +26,12 @@ ApplicationWindow {
     palette.base: Theme.palette.indirectColor1
     font.pixelSize: 13
 
-    onCurrentPageChanged: testsReRunTimer.restart()
+    onCurrentPageChanged: {
+        testsReRunTimer.restart()
+        settings.setValue("currentPage", currentPage)
+    }
+
+    Component.onCompleted: currentPage = settings.value("currentPage")
 
     QtObject {
         id: d
@@ -335,7 +340,6 @@ ApplicationWindow {
     Settings {
         id: settings
 
-        property alias currentPage: root.currentPage
         property alias loadAsynchronously: settingsLayout.loadAsynchronously
         property alias runTestsAutomatically: settingsLayout.runTestsAutomatically
         property alias darkMode: darkModeCheckBox.checked