main: add --version flag to show current version

Fixes #317

lib/wp/wp.c

@@ -67,6 +67,26 @@ wp_init (WpInitFlags flags)
   g_type_ensure (WP_TYPE_FACTORY);
 }
 
+/*!
+ * \brief Gets the WirePlumber library version
+ * \returns WirePlumber library version
+ */
+const char *
+wp_get_library_version (void)
+{
+  return WIREPLUMBER_VERSION;
+}
+
+/*!
+ * \brief Gets the WirePlumber library API version
+ * \returns WirePlumber library API version
+ */
+const char *
+wp_get_library_api_version (void)
+{
+  return WIREPLUMBER_API_VERSION;
+}
+
 /*!
  * \brief Gets the WirePlumber module directory
  * \returns WirePlumber's module directory

lib/wp/wp.h

@@ -66,6 +66,12 @@ typedef enum {
 WP_API
 void wp_init (WpInitFlags flags);
 
+WP_API
+const char * wp_get_library_version (void);
+
+WP_API
+const char * wp_get_library_api_version (void);
+
 WP_API
 const gchar * wp_get_module_dir (void);
 

src/main.c

@@ -24,10 +24,13 @@ enum WpExitCode
   WP_EXIT_CONFIG = 78,      /* configuration error */
 };
 
+static gboolean show_version = FALSE;
 static gchar * config_file = NULL;
 
 static GOptionEntry entries[] =
 {
+  { "version", 'v', G_OPTION_FLAG_NONE, G_OPTION_ARG_NONE, &show_version,
+    "Show version", NULL },
   { "config-file", 'c', G_OPTION_FLAG_NONE, G_OPTION_ARG_STRING, &config_file,
     "The context configuration file", NULL },
   { NULL }
@@ -427,6 +430,16 @@ main (gint argc, gchar **argv)
     return WP_EXIT_USAGE;
   }
 
+  if (show_version) {
+    g_print ("%s\n"
+        "Compiled with libwireplumber %s\n"
+        "Linked with libwireplumber %s\n",
+        argv[0],
+        WIREPLUMBER_VERSION,
+        wp_get_library_version());
+    return WP_EXIT_OK;
+  }
+
   if (!config_file)
     config_file = "wireplumber.conf";