Config: add --list-config-paths option

src/data/help.txt

@@ -4,6 +4,7 @@ Informative options:
     -h,--help:             Show this message
     -h,--help <command>:   Show help for a specific command
     -v,--version:          Show the version of fastfetch
+    --list-config-paths:   List search paths of config files
     --list-logos:          List available logos
     --list-modules:        List available modules
     --list-presets:        List presets fastfetch knows about; they can be loaded with --load-config (+)

src/fastfetch.c

@@ -538,6 +538,15 @@ static inline void listAvailablePresets(FFinstance* instance)
     ffStrbufDestroy(&folder);
 }
 
+static void listConfigPaths(FFinstance* instance)
+{
+    FF_LIST_FOR_EACH(FFstrbuf, folder, instance->state.configDirs)
+    {
+        ffStrbufAppendS(folder, "fastfetch/config.conf");
+        printf("%s%s\n", folder->chars, ffFileExists(folder->chars, S_IFREG) ? " (*)" : "");
+    }
+}
+
 static void parseOption(FFinstance* instance, FFdata* data, const char* key, const char* value);
 
 static bool parseConfigFile(FFinstance* instance, FFdata* data, const char* path)
@@ -902,6 +911,11 @@ static void parseOption(FFinstance* instance, FFdata* data, const char* key, con
             listAvailablePresets(instance);
             exit(0);
         }
+        else if(strcasecmp(subkey, "-config-paths") == 0)
+        {
+            listConfigPaths(instance);
+            exit(0);
+        }
         else if(strcasecmp(subkey, "-features") == 0)
         {
             ffListFeatures();

src/util/FFlist.h

@@ -45,6 +45,12 @@ static inline void ffListSort(FFlist* list, int(*compar)(const void*, const void
     qsort(list->data, list->length, list->elementSize, compar);
 }
 
+#define FF_LIST_FOR_EACH(itemType, itemVarName, listVar) \
+    assert(sizeof(itemType) == (listVar).elementSize); \
+    for(itemType* itemVarName = (itemType*)(listVar).data; \
+        itemVarName - (itemType*)(listVar).data < (listVar).length; \
+        ++itemVarName)
+
 #if defined(_WIN32) || defined(__APPLE__)
     #define FF_LIST_AUTO_DESTROY FFlist __attribute__((__cleanup__(ffListDestroy)))
 #endif