Meson: Simplify settings setup a bit

Also some surrounding code.

Change-Id: I9f537a4357ab76295b7cb4f6a69749a0a6b55392
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/mesonprojectmanager/mesonbuildsystem.cpp

@@ -192,7 +192,7 @@ void MesonBuildSystem::init()
 bool MesonBuildSystem::parseProject()
 {
     QTC_ASSERT(buildConfiguration(), return false);
-    if (!isSetup(buildConfiguration()->buildDirectory()) && Settings::instance()->autorunMeson.value())
+    if (!isSetup(buildConfiguration()->buildDirectory()) && settings().autorunMeson())
         return configure();
     LEAVE_IF_BUSY();
     LOCK();

src/plugins/mesonprojectmanager/mesonpluginconstants.h

@@ -18,7 +18,6 @@ const char PARAMETERS_KEY[] = "MesonProjectManager.BuildConfig.Parameters";
 
 // Settings page
 namespace SettingsPage {
-const char GENERAL_ID[] = "A.MesonProjectManager.SettingsPage.General";
 const char TOOLS_ID[] = "Z.MesonProjectManager.SettingsPage.Tools";
 const char CATEGORY[] = "Z.Meson";
 } // namespace SettingsPage

src/plugins/mesonprojectmanager/mesonprojectplugin.cpp

@@ -45,7 +45,7 @@ public:
     ~MesonProjectPluginPrivate() {}
 
 private:
-    GeneralSettingsPage m_generalSettingsPage;
+    Settings m_settings;
     ToolsSettingsPage m_toolslSettingsPage;
     ToolsSettingsAccessor m_toolsSettings;
     MesonToolKitAspect m_mesonKitAspect;
@@ -60,7 +60,6 @@ private:
     void saveAll()
     {
         m_toolsSettings.saveMesonTools(MesonTools::tools(), ICore::dialogParent());
-        Settings::instance()->writeSettings(ICore::settings());
     }
 };
 
@@ -76,7 +75,6 @@ void MesonProjectPlugin::initialize()
     ProjectManager::registerProjectType<MesonProject>(Constants::Project::MIMETYPE);
     FileIconProvider::registerIconOverlayForFilename(Constants::Icons::MESON, "meson.build");
     FileIconProvider::registerIconOverlayForFilename(Constants::Icons::MESON, "meson_options.txt");
-    Settings::instance()->readSettings(ICore::settings());
 }
 
 } // MesonProjectManager::Internal

src/plugins/mesonprojectmanager/ninjabuildstep.cpp

@@ -44,7 +44,7 @@ NinjaBuildStep::NinjaBuildStep(BuildStepList *bsl, Id id)
     setUseEnglishOutput();
 
     connect(target(), &ProjectExplorer::Target::parsingFinished, this, &NinjaBuildStep::update);
-    connect(&Settings::instance()->verboseNinja, &BaseAspect::changed,
+    connect(&settings().verboseNinja, &BaseAspect::changed,
             this, &NinjaBuildStep::commandChanged);
 }
 
@@ -119,17 +119,15 @@ QWidget *NinjaBuildStep::createConfigWidget()
 // --verbose is only supported since
 // https://github.com/ninja-build/ninja/commit/bf7517505ad1def03e13bec2b4131399331bc5c4
 // TODO check when to switch back to --verbose
-Utils::CommandLine NinjaBuildStep::command()
+CommandLine NinjaBuildStep::command()
 {
-    Utils::CommandLine cmd = [this] {
-        auto tool = NinjaToolKitAspect::ninjaTool(kit());
-        if (tool)
-            return Utils::CommandLine{tool->exe()};
-        return Utils::CommandLine{};
-    }();
+    CommandLine cmd;
+    if (auto tool = NinjaToolKitAspect::ninjaTool(kit()))
+        cmd.setExecutable(tool->exe());
+
     if (!m_commandArgs.isEmpty())
-        cmd.addArgs(m_commandArgs, Utils::CommandLine::RawType::Raw);
-    if (Settings::instance()->verboseNinja.value())
+        cmd.addArgs(m_commandArgs, CommandLine::RawType::Raw);
+    if (settings().verboseNinja())
         cmd.addArg("-v");
     cmd.addArg(m_targetName);
     return cmd;

src/plugins/mesonprojectmanager/settings.cpp

@@ -8,13 +8,26 @@
 
 #include <utils/layoutbuilder.h>
 
-namespace MesonProjectManager {
-namespace Internal {
+namespace MesonProjectManager::Internal {
+
+static Settings *s_instance;
+
+Settings &settings()
+{
+    return *s_instance;
+}
 
 Settings::Settings()
 {
+    s_instance = this;
+
     setSettingsGroup("MesonProjectManager");
-    setAutoApply(false);
+
+    setId("A.MesonProjectManager.SettingsPage.General");
+    setDisplayName(Tr::tr("General"));
+    setDisplayCategory("Meson");
+    setCategory(Constants::SettingsPage::CATEGORY);
+    setCategoryIconPath(Constants::Icons::MESON_BW);
 
     autorunMeson.setSettingsKey("meson.autorun");
     autorunMeson.setLabelText(Tr::tr("Autorun Meson"));
@@ -24,36 +37,16 @@ Settings::Settings()
     verboseNinja.setLabelText(Tr::tr("Ninja verbose mode"));
     verboseNinja.setToolTip(Tr::tr("Enables verbose mode by default when invoking Ninja."));
 
-    registerAspect(&autorunMeson);
-    registerAspect(&verboseNinja);
-}
-
-Settings *Settings::instance()
-{
-    static Settings m_settings;
-    return &m_settings;
-}
-
-GeneralSettingsPage::GeneralSettingsPage()
-{
-    setId(Constants::SettingsPage::GENERAL_ID);
-    setDisplayName(Tr::tr("General"));
-    setDisplayCategory("Meson");
-    setCategory(Constants::SettingsPage::CATEGORY);
-    setCategoryIconPath(Constants::Icons::MESON_BW);
-    setSettings(Settings::instance());
-
-    setLayouter([](QWidget *widget) {
-        Settings &s = *Settings::instance();
+    setLayouter([this] {
         using namespace Layouting;
-
-        Column {
-            s.autorunMeson,
-            s.verboseNinja,
+        return Column {
+            autorunMeson,
+            verboseNinja,
             st,
-        }.attachTo(widget);
+        };
     });
+
+    readSettings();
 }
 
-} // namespace Internal
-} // namespace MesonProjectManager
+} // MesonProjectManager::Internal

src/plugins/mesonprojectmanager/settings.h

@@ -7,25 +7,17 @@
 
 #include <utils/aspects.h>
 
-namespace MesonProjectManager {
-namespace Internal {
+namespace MesonProjectManager::Internal {
 
-class Settings : public Utils::AspectContainer
+class Settings : public Core::PagedSettings
 {
 public:
     Settings();
 
-    static Settings *instance();
-
-    Utils::BoolAspect autorunMeson;
-    Utils::BoolAspect verboseNinja;
+    Utils::BoolAspect autorunMeson{this};
+    Utils::BoolAspect verboseNinja{this};
 };
 
-class GeneralSettingsPage final : public Core::IOptionsPage
-{
-public:
-    GeneralSettingsPage();
-};
+Settings &settings();
 
-} // namespace Internal
-} // namespace MesonProjectManager
+} // MesonProjectManager::Internal