cli: drop GValue transformation of GBytes to string and implement bytes getter via _get_fcn_gobject_impl()

The g_value_register_transform_func() for handling GBytes was not actually used.
All properties of type G_TYPE_BYTES have their explit handler how to convert bytes
to string. That is good, because the implementation there was very bad (it did not
honor pretty/parsable get-type).

Also, merge _get_fcn_gobject_bytes() into _get_fcn_gobject_impl(). We
already have a generic handler that handles properties solely based on
the GObject type: _get_fcn_gobject_impl(). Just let it also handle
bytes. It's better to have fewer handlers, if they don't need special
context.

clients/cli/nmcli.c

@@ -938,34 +938,6 @@ nmc_convert_string_hash_to_string (const GValue *src_value, GValue *dest_value)
 	g_value_take_string (dest_value, g_string_free (string, FALSE));
 }
 
-static void
-nmc_convert_bytes_to_string (const GValue *src_value, GValue *dest_value)
-{
-	GBytes *bytes;
-	const guint8 *array;
-	gsize length;
-	GString *printable;
-	guint i = 0;
-
-	bytes = g_value_get_boxed (src_value);
-
-	printable = g_string_new ("[");
-
-	if (bytes) {
-		array = g_bytes_get_data (bytes, &length);
-		while (i < MIN (length, 35)) {
-			if (i > 0)
-				g_string_append_c (printable, ' ');
-			g_string_append_printf (printable, "0x%02X", array[i++]);
-		}
-		if (i < length)
-			g_string_append (printable, " ... ");
-	}
-	g_string_append_c (printable, ']');
-
-	g_value_take_string (dest_value, g_string_free (printable, FALSE));
-}
-
 static void
 nmc_value_transforms_register (void)
 {
@@ -975,10 +947,6 @@ nmc_value_transforms_register (void)
 	g_value_register_transform_func (G_TYPE_HASH_TABLE,
 	                                 G_TYPE_STRING,
 	                                 nmc_convert_string_hash_to_string);
-
-	g_value_register_transform_func (G_TYPE_BYTES,
-	                                 G_TYPE_STRING,
-	                                 nmc_convert_bytes_to_string);
 }
 
 void

clients/common/nm-meta-setting-desc.c

@@ -77,6 +77,25 @@ _gtype_property_get_gtype (GType gtype, const char *property_name)
 
 /*****************************************************************************/
 
+static char *
+bytes_to_string (GBytes *bytes)
+{
+	const guint8 *data;
+	gsize len;
+
+	if (!bytes)
+		return NULL;
+
+	data = g_bytes_get_data (bytes, &len);
+	return nm_utils_bin2hexstr_full (data,
+	                                 len,
+	                                 '\0',
+	                                 TRUE,
+	                                 NULL);
+}
+
+/*****************************************************************************/
+
 static int
 _int64_cmp_desc (gconstpointer a,
                  gconstpointer b,
@@ -836,13 +855,14 @@ _get_fcn_gobject_impl (const NMMetaPropertyInfo *property_info,
 	gtype_prop = _gobject_property_get_gtype (G_OBJECT (setting), property_info->property_name);
 
 	glib_handles_str_transform = !NM_IN_SET (gtype_prop, G_TYPE_BOOLEAN,
-	                                                     G_TYPE_STRV);
+	                                                     G_TYPE_STRV,
+	                                                     G_TYPE_BYTES);
 
 	if (glib_handles_str_transform) {
 		/* We rely on the type convertion of the gobject property to string.
 		 *
 		 * Note that we register some transformations via nmc_value_transforms_register()
-		 * to make that working for G_TYPE_HASH_TABLE, and G_TYPE_BYTES.
+		 * to make that working for G_TYPE_HASH_TABLE.
 		 *
 		 * FIXME: that is particularly ugly because it's non-obvious which code relies
 		 * on nmc_value_transforms_register(). Also, nmc_value_transforms_register() is
@@ -894,6 +914,14 @@ _get_fcn_gobject_impl (const NMMetaPropertyInfo *property_info,
 		return "";
 	}
 
+	if (gtype_prop == G_TYPE_BYTES) {
+		char *str;
+
+		str = bytes_to_string (g_value_get_boxed (&val));
+		NM_SET_OUT (out_is_default, !str || !str[0]);
+		RETURN_STR_TO_FREE (str);
+	}
+
 	nm_assert_not_reached ();
 	return NULL;
 }
@@ -1652,23 +1680,6 @@ wep_key_type_to_string (NMWepKeyType type)
 	}
 }
 
-static char *
-bytes_to_string (GBytes *bytes)
-{
-	const guint8 *data;
-	gsize len;
-
-	if (!bytes)
-		return NULL;
-
-	data = g_bytes_get_data (bytes, &len);
-	return nm_utils_bin2hexstr_full (data,
-	                                 len,
-	                                 '\0',
-	                                 TRUE,
-	                                 NULL);
-}
-
 static char *
 vlan_flags_to_string (guint32 flags, NMMetaAccessorGetType get_type)
 {
@@ -2257,21 +2268,6 @@ _set_fcn_cert_8021x (ARGS_SET_FCN)
 	}
 }
 
-static gconstpointer
-_get_fcn_gobject_bytes (ARGS_GET_FCN)
-{
-	gs_unref_bytes GBytes *bytes = NULL;
-	char *str;
-
-	RETURN_UNSUPPORTED_GET_TYPE ();
-
-	g_object_get (setting, property_info->property_name, &bytes, NULL);
-
-	str = bytes_to_string (bytes);
-	NM_SET_OUT (out_is_default, !str || !str[0]);
-	RETURN_STR_TO_FREE (str);
-}
-
 static gconstpointer
 _get_fcn_bond_options (ARGS_GET_FCN)
 {
@@ -4370,7 +4366,7 @@ static const NMMetaPropertyType _pt_gobject_mtu = {
 };
 
 static const NMMetaPropertyType _pt_gobject_bytes = {
-	.get_fcn =                     _get_fcn_gobject_bytes,
+	.get_fcn =                     _get_fcn_gobject,
 	.set_fcn =                     _set_fcn_gobject_bytes,
 };