Disable opt. dependencies dynamically

This lifts the requirement of needing to disable the dependencies by
hand if you don't have them installed.
It also enables us to have a single package, that works for all.

README.md

@@ -4,7 +4,7 @@ My personal blazingly fast and efficient status bar + widgets, in case anyone fi
 *gBar: **G**TK **Bar***
 
 ## Prerequisites 
-*If you don't have the optional dependencies, some features are not available and you must manually disable them.*
+*If you don't have the optional dependencies, some features are not available.*
 - wayland
 - Hyprland(Optional -> For workspaces widget)
 - nvidia-utils(Optional -> For GPU status)
@@ -23,7 +23,7 @@ My personal blazingly fast and efficient status bar + widgets, in case anyone fi
     ```
     *All optional dependencies are disabled*
     ```
-    meson build --buildtype=release -DHasHyprland=false -DHasNvidia=false -DHasBlueZ=false
+    meson build --buildtype=release -DWithHyprland=false -DWithNvidia=false -DWithBlueZ=false
     ```
 4. Build and install
     ```

meson.build

@@ -17,19 +17,19 @@ headers = [
   'src/Config.h'
 ]
 
-if get_option('HasHyprland')
+if get_option('WithHyprland')
-  add_global_arguments('-DHAS_HYPRLAND', language: 'cpp')
+  add_global_arguments('-DWITH_HYPRLAND', language: 'cpp')
   headers += 'src/Hyprland.h'
 endif
-if get_option('HasNvidia')
+if get_option('WithNvidia')
-  add_global_arguments('-DHAS_NVIDIA', language: 'cpp')
+  add_global_arguments('-DWITH_NVIDIA', language: 'cpp')
   headers += 'src/NvidiaGPU.h'
 endif
-if get_option('HasBlueZ')
+if get_option('WithBlueZ')
-  add_global_arguments('-DHAS_BLUEZ', language: 'cpp')
+  add_global_arguments('-DWITH_BLUEZ', language: 'cpp')
 endif
-if get_option('HasSys')
+if get_option('WithSys')
-  add_global_arguments('-DHAS_SYS', language: 'cpp')
+  add_global_arguments('-DWITH_SYS', language: 'cpp')
 endif
 
 pulse = dependency('libpulse')

meson_options.txt

@@ -1,6 +1,6 @@
-option('HasHyprland', type: 'boolean', value : true)
+option('WithHyprland', type: 'boolean', value : true)
-option('HasNvidia', type: 'boolean', value : true)
+option('WithNvidia', type: 'boolean', value : true)
-option('HasBlueZ', type: 'boolean', value : true)
+option('WithBlueZ', type: 'boolean', value : true)
 
 # You shouldn't enable this, unless you know what you are doing!
-option('HasSys', type: 'boolean', value : false)
+option('WithSys', type: 'boolean', value : false)

src/Bar.cpp

@@ -52,7 +52,7 @@ namespace Bar
             return TimerResult::Ok;
         }
 
-#ifdef HAS_NVIDIA
+#ifdef WITH_NVIDIA
         static Text* gpuText;
         static TimerResult UpdateGPU(CairoSensor& sensor)
         {
@@ -87,7 +87,7 @@ namespace Bar
             return TimerResult::Ok;
         }
 
-#ifdef HAS_BLUEZ
+#ifdef WITH_BLUEZ
         static Button* btIconText;
         static Text* btDevText;
         static TimerResult UpdateBluetooth(Box&)
@@ -161,7 +161,7 @@ namespace Bar
             return TimerResult::Ok;
         }
 
-#ifdef HAS_HYPRLAND
+#ifdef WITH_HYPRLAND
         static std::array<Button*, 9> workspaces;
         TimerResult UpdateWorkspaces(Box&)
         {
@@ -169,21 +169,11 @@ namespace Bar
             {
                 switch (System::GetWorkspaceStatus((uint32_t)monitorID, i + 1))
                 {
-                case System::WorkspaceStatus::Dead:
+                case System::WorkspaceStatus::Dead: workspaces[i]->SetClass("ws-dead"); break;
-                    workspaces[i]->SetClass("ws-dead");
+                case System::WorkspaceStatus::Inactive: workspaces[i]->SetClass("ws-inactive"); break;
-                    break;
+                case System::WorkspaceStatus::Visible: workspaces[i]->SetClass("ws-visible"); break;
-                case System::WorkspaceStatus::Inactive:
+                case System::WorkspaceStatus::Current: workspaces[i]->SetClass("ws-current"); break;
-                    workspaces[i]->SetClass("ws-inactive");
+                case System::WorkspaceStatus::Active: workspaces[i]->SetClass("ws-active"); break;
-                    break;
-                case System::WorkspaceStatus::Visible:
-                    workspaces[i]->SetClass("ws-visible");
-                    break;
-                case System::WorkspaceStatus::Current:
-                    workspaces[i]->SetClass("ws-current");
-                    break;
-                case System::WorkspaceStatus::Active:
-                    workspaces[i]->SetClass("ws-active");
-                    break;
                 }
                 workspaces[i]->SetText(System::GetWorkspaceSymbol(i));
             }
@@ -256,7 +246,7 @@ namespace Bar
         parent.AddChild(std::move(box));
     }
 
-#ifdef HAS_BLUEZ
+#ifdef WITH_BLUEZ
     void WidgetBluetooth(Widget& parent)
     {
         auto box = Widget::Create<Box>();
@@ -282,14 +272,18 @@ namespace Bar
     void WidgetSensors(Widget& parent)
     {
         Sensor(parent, DynCtx::UpdateDisk, "disk-util-progress", "disk-data-text", DynCtx::diskText);
-#ifdef HAS_NVIDIA
+#ifdef WITH_NVIDIA
-        Sensor(parent, DynCtx::UpdateVRAM, "vram-util-progress", "vram-data-text", DynCtx::vramText);
+        if (RuntimeConfig::Get().hasNvidia)
-        Sensor(parent, DynCtx::UpdateGPU, "gpu-util-progress", "gpu-data-text", DynCtx::gpuText);
+        {
+            Sensor(parent, DynCtx::UpdateVRAM, "vram-util-progress", "vram-data-text", DynCtx::vramText);
+            Sensor(parent, DynCtx::UpdateGPU, "gpu-util-progress", "gpu-data-text", DynCtx::gpuText);
+        }
 #endif
         Sensor(parent, DynCtx::UpdateRAM, "ram-util-progress", "ram-data-text", DynCtx::ramText);
         Sensor(parent, DynCtx::UpdateCPU, "cpu-util-progress", "cpu-data-text", DynCtx::cpuText);
         // Only show battery percentage if battery folder is set and exists
-        if (System::GetBatteryPercentage() >= 0) {
+        if (System::GetBatteryPercentage() >= 0)
+        {
             Sensor(parent, DynCtx::UpdateBattery, "battery-util-progress", "battery-data-text", DynCtx::batteryText);
         }
     }
@@ -376,7 +370,7 @@ namespace Bar
         parent.AddChild(std::move(eventBox));
     }
 
-#ifdef HAS_HYPRLAND
+#ifdef WITH_HYPRLAND
     void WidgetWorkspaces(Widget& parent)
     {
         auto margin = Widget::Create<Box>();
@@ -413,15 +407,14 @@ namespace Bar
         mainWidget->SetSpacing({0, Config::Get().centerTime});
         mainWidget->SetClass("bar");
         {
-#ifdef HAS_HYPRLAND
-            auto left = Widget::Create<Box>();
-            left->SetSpacing({0, false});
-            left->SetHorizontalTransform({-1, true, Alignment::Left});
-            WidgetWorkspaces(*left);
-#else
             auto left = Widget::Create<Box>();
             left->SetSpacing({0, false});
             left->SetHorizontalTransform({-1, true, Alignment::Left});
+#ifdef WITH_HYPRLAND
+            if (RuntimeConfig::Get().hasHyprland)
+            {
+                WidgetWorkspaces(*left);
+            }
 #endif
 
             auto time = Widget::Create<Text>();
@@ -437,8 +430,9 @@ namespace Bar
             {
                 WidgetAudio(*right);
 
-#ifdef HAS_BLUEZ
+#ifdef WITH_BLUEZ
-                WidgetBluetooth(*right);
+                if (RuntimeConfig::Get().hasBlueZ)
+                    WidgetBluetooth(*right);
 #endif
 
                 WidgetSensors(*right);

src/BluetoothDevices.cpp

@@ -5,7 +5,7 @@
 #include <string>
 #include <algorithm>
 
-#ifdef HAS_BLUEZ
+#ifdef WITH_BLUEZ
 namespace BluetoothDevices
 {
     namespace DynCtx

src/Config.cpp

@@ -138,3 +138,9 @@ void Config::Load()
         }
     }
 }
+
+RuntimeConfig& RuntimeConfig::Get()
+{
+    static RuntimeConfig config;
+    return config;
+}

src/Config.h

@@ -18,3 +18,28 @@ public:
     static void Load();
     static const Config& Get();
 };
+
+// Configs, that rely on specific files to be available(e.g. Hyprland running)
+class RuntimeConfig
+{
+public:
+#ifdef WITH_NVIDIA
+    bool hasNvidia = true;
+#else
+    bool hasNvidia = false;
+#endif
+
+#ifdef WITH_HYPRLAND
+    bool hasHyprland = true;
+#else
+    bool hasHyprland = false;
+#endif
+
+#ifdef WITH_BLUEZ
+    bool hasBlueZ = true;
+#else
+    bool hasBlueZ = false;
+#endif
+
+    static RuntimeConfig& Get();
+};

src/Hyprland.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "Common.h"
 #include "System.h"
+#include "Config.h"
 
 #include <cstdint>
 #include <string>
@@ -10,9 +11,19 @@
 #include <sys/un.h>
 #include <unistd.h>
 
-#ifdef HAS_HYPRLAND
+#ifdef WITH_HYPRLAND
 namespace Hyprland
 {
+    inline void Init()
+    {
+        if (!getenv("HYPRLAND_INSTANCE_SIGNATURE"))
+        {
+            LOG("Hyprland not running, disabling workspaces");
+            // Not available
+            RuntimeConfig::Get().hasHyprland = false;
+        }
+    }
+
     inline std::string DispatchIPC(const std::string& arg)
     {
         int hyprSocket = socket(AF_UNIX, SOCK_STREAM, 0);
@@ -46,6 +57,12 @@ namespace Hyprland
 
     inline System::WorkspaceStatus GetStatus(uint32_t monitorID, uint32_t workspaceId)
     {
+        if (RuntimeConfig::Get().hasHyprland == false)
+        {
+            LOG("Error: Queried for workspace status, but Hyprland isn't open!");
+            return System::WorkspaceStatus::Dead;
+        }
+
         std::string workspaces = DispatchIPC("/workspaces");
         if (workspaces.find("workspace ID " + std::to_string(workspaceId)) == std::string::npos)
         {
@@ -87,8 +104,15 @@ namespace Hyprland
             return System::WorkspaceStatus::Inactive;
         }
     }
+
     inline void Goto(uint32_t workspace)
     {
+        if (RuntimeConfig::Get().hasHyprland == false)
+        {
+            LOG("Error: Called Go to workspace, but Hyprland isn't open!");
+            return;
+        }
+
         system(("hyprctl dispatch workspace " + std::to_string(workspace)).c_str());
     }
 }

src/NvidiaGPU.h

@@ -1,8 +1,10 @@
 #pragma once
 #include "Common.h"
+#include "Config.h"
+
 #include <dlfcn.h>
 
-#ifdef HAS_NVIDIA
+#ifdef WITH_NVIDIA
 namespace NvidiaGPU
 {
     static void* nvmldl;
@@ -11,9 +13,18 @@ namespace NvidiaGPU
 
     inline void Init()
     {
-        if (nvmldl) return;
+        if (nvmldl || !RuntimeConfig::Get().hasNvidia)
+            return;
+
         nvmldl = dlopen("libnvidia-ml.so", RTLD_NOW);
-        ASSERT(nvmldl, "Cannot open libnvidia-ml.so");
+        // nvmldl not found. Nvidia probably not installed
+        if (!nvmldl)
+        {
+            LOG("NVML not found, disabling Nvidia GPU");
+            RuntimeConfig::Get().hasNvidia = false;
+            return;
+        }
+
         typedef int (*PFN_nvmlInit)();
         auto nvmlInit = (PFN_nvmlInit)dlsym(nvmldl, "nvmlInit");
         int res = nvmlInit();
@@ -28,7 +39,8 @@ namespace NvidiaGPU
 
     inline void Shutdown()
     {
-        dlclose(nvmldl);
+        if (nvmldl)
+            dlclose(nvmldl);
     }
 
     struct GPUUtilization
@@ -45,6 +57,12 @@ namespace NvidiaGPU
 
     inline GPUUtilization GetUtilization()
     {
+        if (!RuntimeConfig::Get().hasNvidia)
+        {
+            LOG("Error: Called Nvidia GetUtilization, but nvml wasn't found!");
+            return {};
+        }
+
         GPUUtilization util;
         typedef int (*PFN_nvmlDeviceGetUtilizationRates)(void*, GPUUtilization*);
         auto nvmlDeviceGetUtilizationRates = (PFN_nvmlDeviceGetUtilizationRates)dlsym(nvmldl, "nvmlDeviceGetUtilizationRates");
@@ -56,6 +74,12 @@ namespace NvidiaGPU
 
     inline uint32_t GetTemperature()
     {
+        if (!RuntimeConfig::Get().hasNvidia)
+        {
+            LOG("Error: Called Nvidia GetTemperature, but nvml wasn't found!");
+            return {};
+        }
+
         typedef int (*PFN_nvmlDeviceGetTemperature)(void*, uint32_t, uint32_t*);
         auto nvmlDeviceGetTemperature = (PFN_nvmlDeviceGetTemperature)dlsym(nvmldl, "nvmlDeviceGetTemperature");
         uint32_t temp;
@@ -66,6 +90,12 @@ namespace NvidiaGPU
 
     inline VRAM GetVRAM()
     {
+        if (!RuntimeConfig::Get().hasNvidia)
+        {
+            LOG("Error: Called Nvidia GetVRAM, but nvml wasn't found!");
+            return {};
+        }
+
         typedef int (*PFN_nvmlDeviceGetMemoryInfo)(void*, VRAM*);
         auto nvmlDeviceGetMemoryInfo = (PFN_nvmlDeviceGetMemoryInfo)dlsym(nvmldl, "nvmlDeviceGetMemoryInfo");
         VRAM mem;

src/System.cpp

@@ -133,7 +133,7 @@ namespace System
         return out;
     }
 
-#ifdef HAS_NVIDIA
+#ifdef WITH_NVIDIA
     GPUInfo GetGPUInfo()
     {
         NvidiaGPU::GPUUtilization util = NvidiaGPU::GetUtilization();
@@ -165,10 +165,33 @@ namespace System
         return out;
     }
 
-#ifdef HAS_BLUEZ
+#ifdef WITH_BLUEZ
+    void InitBluetooth()
+    {
+        // Try connecting to d-bus and org.bluez
+        GDBusConnection* connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM, nullptr, nullptr);
+        ASSERT(connection, "Failed to connect to d-bus!");
+
+        GError* err = nullptr;
+        GVariant* objects = g_dbus_connection_call_sync(connection, "org.bluez", "/", "org.freedesktop.DBus.ObjectManager", "GetManagedObjects",
+                                                        nullptr, G_VARIANT_TYPE("(a{oa{sa{sv}}})"), G_DBUS_CALL_FLAGS_NONE, -1, nullptr, &err);
+        if (!objects)
+        {
+            LOG("Can't connect to BlueZ d-bus! Disabling Bluetooth!");
+            LOG(err->message);
+            g_error_free(err);
+            // Not found, disable bluetooth
+            RuntimeConfig::Get().hasBlueZ = false;
+        }
+    }
     BluetoothInfo GetBluetoothInfo()
     {
         BluetoothInfo out{};
+        if (!RuntimeConfig::Get().hasBlueZ)
+        {
+            LOG("Error: GetBluetoothInfo called, but bluetooth isn't available");
+            return out;
+        }
         // Init D-Bus
         GDBusConnection* connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM, nullptr, nullptr);
         ASSERT(connection, "Failed to connect to d-bus!");
@@ -381,7 +404,7 @@ namespace System
         PulseAudio::SetVolume(volume);
     }
 
-#ifdef HAS_HYPRLAND
+#ifdef WITH_HYPRLAND
     WorkspaceStatus GetWorkspaceStatus(uint32_t monitor, uint32_t workspace)
     {
         return Hyprland::GetStatus(monitor, workspace);
@@ -441,18 +464,29 @@ namespace System
     void Init()
     {
         Config::Load();
-#ifdef HAS_NVIDIA
+
+#ifdef WITH_NVIDIA
         NvidiaGPU::Init();
 #endif
+
+#ifdef WITH_HYPRLAND
+        Hyprland::Init();
+#endif
+
+#ifdef WITH_BLUEZ
+        InitBluetooth();
+#endif
+
         PulseAudio::Init();
     }
     void FreeResources()
     {
-#ifdef HAS_NVIDIA
+#ifdef WITH_NVIDIA
         NvidiaGPU::Shutdown();
 #endif
         PulseAudio::Shutdown();
-#ifdef HAS_BLUEZ
+
+#ifdef WITH_BLUEZ
         StopBTScan();
 #endif
     }

src/System.h

@@ -19,7 +19,7 @@ namespace System
     };
     RAMInfo GetRAMInfo();
 
-#ifdef HAS_NVIDIA
+#ifdef WITH_NVIDIA
     struct GPUInfo
     {
         double utilisation;
@@ -42,7 +42,7 @@ namespace System
     };
     DiskInfo GetDiskInfo();
 
-#ifdef HAS_BLUEZ
+#ifdef WITH_BLUEZ
     struct BluetoothDevice
     {
         bool connected;
@@ -79,7 +79,7 @@ namespace System
     AudioInfo GetAudioInfo();
     void SetVolume(double volume);
 
-#ifdef HAS_HYPRLAND
+#ifdef WITH_HYPRLAND
     enum class WorkspaceStatus
     {
         Dead,

src/gBar.cpp

@@ -5,6 +5,7 @@
 #include "AudioFlyin.h"
 #include "BluetoothDevices.h"
 #include "Plugin.h"
+#include "Config.h"
 
 #include <cmath>
 #include <cstdio>
@@ -43,10 +44,18 @@ int main(int argc, char** argv)
             exit(0);
         }
     }
-#ifdef HAS_BLUEZ
+#ifdef WITH_BLUEZ
     else if (strcmp(argv[1], "bluetooth") == 0)
     {
-        BluetoothDevices::Create(window, monitor);
+        if (RuntimeConfig::Get().hasBlueZ)
+        {
+            BluetoothDevices::Create(window, monitor);
+        }
+        else
+        {
+            LOG("Blutooth disabled, cannot open bluetooth widget!");
+            exit(1);
+        }
     }
 #endif
     else