meson: make ‘alsa’ plugin compile time optional

meson.build

@@ -132,10 +132,11 @@ yambar = executable(
   dependencies: [bar, libepoll, libinotify,  pixman, yaml, threads, dl, tllist, fcft] +
                 decorations + particles + modules,
   c_args: [
-    plugin_mpd_enabled? '-DPLUGIN_ENABLED_MPD':[],
+    plugin_alsa_enabled ? '-DPLUGIN_ENABLED_ALSA' : [],
-    plugin_pulse_enabled? '-DPLUGIN_ENABLED_PULSE':[],
+    plugin_dwl_enabled ? '-DPLUGIN_ENABLED_DWL' : [],
-    plugin_pipewire_enabled? '-DPLUGIN_ENABLED_PIPEWIRE':[],
+    plugin_mpd_enabled ? '-DPLUGIN_ENABLED_MPD' : [],
-    plugin_dwl_enabled? '-DPLUGIN_ENABLED_DWL':[],
+    plugin_pipewire_enabled ? '-DPLUGIN_ENABLED_PIPEWIRE' : [],
+    plugin_pulse_enabled ? '-DPLUGIN_ENABLED_PULSE' : [],
   ],
   build_rpath: '$ORIGIN/modules:$ORIGIN/decorations:$ORIGIN/particles',
   export_dynamic: true,
@@ -174,6 +175,7 @@ summary(
 
 summary(
   {
+    'ALSA': plugin_alsa_enabled,
     'DWL (dwm for Wayland)': plugin_dwl_enabled,
     'Music Player Daemon (MPD)': plugin_mpd_enabled,
     'Pipewire': plugin_pipewire_enabled,

meson_options.txt

@@ -6,6 +6,7 @@ option(
   'core-plugins-as-shared-libraries', type: 'boolean', value: false,
   description: 'Compiles modules, particles and decorations as shared libraries, which are loaded on-demand')
 
+option('plugin-alsa', type: 'feature', value: 'auto', description: 'ALSA')
 option('plugin-dwl', type: 'feature', value: 'auto',
        description: 'DWL (dwm for wayland) support')
 option('plugin-mpd', type: 'feature', value: 'auto',

modules/meson.build

@@ -2,14 +2,17 @@ module_sdk = declare_dependency(dependencies: [pixman, threads, tllist, fcft])
 
 modules = []
 
-alsa = dependency('alsa')
 udev = dependency('libudev')
 json = dependency('json-c')
 xcb_xkb = dependency('xcb-xkb', required: get_option('backend-x11'))
 
 # Optional deps
+alsa = dependency('alsa', required: get_option('plugin-alsa'))
+plugin_alsa_enabled = alsa.found()
+
 mpd = dependency('libmpdclient', required: get_option('plugin-mpd'))
 plugin_mpd_enabled = mpd.found()
+
 pipewire = dependency('libpipewire-0.3', required: get_option('plugin-pipewire'))
 plugin_pipewire_enabled = pipewire.found()
 
@@ -20,7 +23,6 @@ plugin_dwl_enabled = get_option('plugin-dwl').allowed()
 
 # Module name -> (source-list, dep-list)
 mod_data = {
-  'alsa': [[], [m, alsa]],
   'backlight': [[], [m, udev]],
   'battery': [[], [udev]],
   'clock': [[], []],
@@ -35,6 +37,10 @@ mod_data = {
   'sway-xkb': [['i3-common.c', 'i3-common.h'], [dynlist, json]],
 }
 
+if plugin_alsa_enabled
+  mod_data += {'alsa': [[], [m, alsa]]}
+endif
+
 if plugin_dwl_enabled
   mod_data += {'dwl': [[], [dynlist]]}
 endif

plugin.c

@@ -32,7 +32,9 @@
         keychain_t *chain, const struct yml_node *node);                \
     extern struct deco *plug_name##_from_conf(const struct yml_node *node);
 
+#if defined(PLUGIN_ENABLED_ALSA)
 EXTERN_MODULE(alsa);
+#endif
 EXTERN_MODULE(backlight);
 EXTERN_MODULE(battery);
 EXTERN_MODULE(clock);
@@ -124,7 +126,9 @@ init(void)
         tll_back(plugins).decoration = &deco_##func_prefix##_iface;     \
     } while (0)
 
+#if defined(PLUGIN_ENABLED_ALSA)
     REGISTER_CORE_MODULE(alsa, alsa);
+#endif
     REGISTER_CORE_MODULE(backlight, backlight);
     REGISTER_CORE_MODULE(battery, battery);
     REGISTER_CORE_MODULE(clock, clock);