Added 'MPRIS' module

This commit adds the ability to display status information for MPRIS
compatible music players.

Closes #53

modules/dbus.h

@@ -0,0 +1,13 @@
+#pragma once
+
+// This header provides an generic interface for different versions of
+// systemd-sdbus.
+
+#if defined(HAVE_LIBSYSTEMD)
+#include <systemd/sd-bus.h>
+#elif defined(HAVE_LIBELOGIND)
+#include <elogind/sd-bus.h>
+#elif defined(HAVE_BASU)
+#include <basu/sd-bus.h>
+#endif
+

modules/meson.build

@@ -22,6 +22,9 @@ plugin_mem_enabled = get_option('plugin-mem').allowed()
 mpd = dependency('libmpdclient', required: get_option('plugin-mpd'))
 plugin_mpd_enabled = mpd.found()
 
+mpris = sdbus
+plugin_mpris_enabled = sdbus.found()
+
 json_i3 = dependency('json-c', required: get_option('plugin-i3'))
 plugin_i3_enabled = json_i3.found()
 
@@ -95,6 +98,10 @@ if plugin_mpd_enabled
   mod_data += {'mpd': [[], [mpd]]}
 endif
 
+if plugin_mpris_enabled
+  mod_data += {'mpris': [[], [mpris]]}
+endif
+
 if plugin_i3_enabled
   mod_data += {'i3': [['i3-common.c', 'i3-common.h'], [dynlist, json_i3]]}
 endif