battery: limit to Linux due to /sys/class/power_supply

../include/modules/battery.hpp:9:10: fatal error: 'sys/inotify.h' file not found
 #include <sys/inotify.h>
          ^~~~~~~~~~~~~~~

include/factory.hpp

@@ -7,7 +7,7 @@
 #include "modules/sway/window.hpp"
 #include "modules/sway/workspaces.hpp"
 #endif
-#ifndef NO_FILESYSTEM
+#if defined(__linux__) && !defined(NO_FILESYSTEM)
 #include "modules/battery.hpp"
 #endif
 #include "modules/cpu.hpp"

meson.build

@@ -114,7 +114,6 @@ src_files = files(
     'src/AModule.cpp',
     'src/ALabel.cpp',
     'src/modules/memory.cpp',
-    'src/modules/battery.cpp',
     'src/modules/bluetooth.cpp',
     'src/modules/clock.cpp',
     'src/modules/custom.cpp',
@@ -128,6 +127,12 @@ src_files = files(
     'src/util/rfkill.cpp'
 )
 
+if is_linux
+    src_files += files(
+        'src/modules/battery.cpp',
+    )
+endif
+
 if true # find_program('sway', required : false).found()
     add_project_arguments('-DHAVE_SWAY', language: 'cpp')
     src_files += [

src/factory.cpp

@@ -7,7 +7,7 @@ waybar::AModule* waybar::Factory::makeModule(const std::string& name) const {
     auto hash_pos = name.find('#');
     auto ref = name.substr(0, hash_pos);
     auto id = hash_pos != std::string::npos ? name.substr(hash_pos + 1) : "";
-#ifndef NO_FILESYSTEM
+#if defined(__linux__) && !defined(NO_FILESYSTEM)
     if (ref == "battery") {
       return new waybar::modules::Battery(id, config_[name]);
     }