Add log file

Plus refactoring out the logging.

meson.build

@@ -10,6 +10,7 @@ gtk_layer_shell = dependency('gtk-layer-shell-0')
 
 headers = [
   'src/Common.h',
+  'src/Log.h',
   'src/System.h',
   'src/PulseAudio.h',
   'src/Widget.h',
@@ -37,6 +38,8 @@ if get_option('WithSys')
   add_global_arguments('-DWITH_SYS', language: 'cpp')
 endif
 
+add_global_arguments('-DUSE_LOGFILE', language: 'cpp')
+
 pulse = dependency('libpulse')
 
 libgBar = library('gBar', 
@@ -48,7 +51,8 @@ libgBar = library('gBar',
    'src/BluetoothDevices.cpp',
    'src/Plugin.cpp',
    'src/Config.cpp',
-   'src/CSS.cpp'
+   'src/CSS.cpp',
+   'src/Log.cpp'
   ],
   dependencies: [gtk, gtk_layer_shell, pulse],
   install: true)

src/Common.h

@@ -3,14 +3,9 @@
 #include <unistd.h>
 #include <string>
 
+#include "Log.h"
+
 #define UNUSED [[maybe_unused]]
-#define LOG(x) std::cout << x << '\n'
-#define ASSERT(x, log)                                  \
-    if (!(x))                                           \
-    {                                                   \
-        LOG(log << "\n[Exiting due to assert failed]"); \
-        exit(-1);                                       \
-    }
 
 // Flag helper macros
 #define BIT(x) (1 << (x))

src/Log.cpp

@@ -0,0 +1,29 @@
+#include "Log.h"
+#include "Common.h"
+
+#include <fstream>
+
+namespace Logging
+{
+    static std::ofstream logFile;
+
+    void Init()
+    {
+        logFile = std::ofstream("/tmp/gBar.log");
+        if (!logFile.is_open())
+        {
+            LOG("Cannot open logfile(/tmp/gBar.log)");
+        }
+    }
+
+    void Log(const std::string& str)
+    {
+        if (logFile.is_open())
+            logFile << str << std::endl;
+    }
+
+    void Shutdown()
+    {
+        logFile.close();
+    }
+}

src/Log.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <sstream>
+
+#ifdef USE_LOGFILE
+#define LOG(x)                   \
+    std::cout << x << '\n';      \
+    {                            \
+        std::stringstream str;   \
+        str << x;                \
+        Logging::Log(str.str()); \
+    }
+#else
+#define LOG(x) std::cout << x << '\n'
+#endif
+#define ASSERT(x, log)                                  \
+    if (!(x))                                           \
+    {                                                   \
+        LOG(log << "\n[Exiting due to assert failed]"); \
+        exit(-1);                                       \
+    }
+namespace Logging
+{
+    void Init();
+
+    void Log(const std::string& str);
+
+    void Shutdown();
+}

src/System.cpp

@@ -562,6 +562,8 @@ namespace System
 
     void Init()
     {
+        Logging::Init();
+
         Config::Load();
 
 #ifdef WITH_NVIDIA
@@ -594,5 +596,6 @@ namespace System
 #ifdef WITH_BLUEZ
         StopBTScan();
 #endif
+        Logging::Shutdown();
     }
 }