commands: require set variable to start with $

sway/commands/set.c

@@ -25,23 +25,13 @@ void free_sway_variable(struct sway_variable *var) {
 }
 
 struct cmd_results *cmd_set(int argc, char **argv) {
-	char *tmp;
 	struct cmd_results *error = NULL;
 	if ((error = checkarg(argc, "set", EXPECTED_AT_LEAST, 2))) {
 		return error;
 	}
 
 	if (argv[0][0] != '$') {
-		wlr_log(WLR_INFO, "Warning: variable '%s' doesn't start with $", argv[0]);
-
-		size_t size = snprintf(NULL, 0, "$%s", argv[0]);
-		tmp = malloc(size + 1);
-		if (!tmp) {
-			return cmd_results_new(CMD_FAILURE, "set", "Not possible to create variable $'%s'", argv[0]);
-		}
-		snprintf(tmp, size+1, "$%s", argv[0]);
-
-		argv[0] = tmp;
+		return cmd_results_new(CMD_INVALID, "set", "variable '%s' must start with $", argv[0]);
 	}
 
 	struct sway_variable *var = NULL;

sway/sway.5.scd

@@ -51,7 +51,7 @@ The following commands may only be used in the configuration file.
 	*wordexp*(3) for details). The same include file can only be included once;
 	subsequent attempts will be ignored.
 
-*set* <name> <value>
+*set* $<name> <value>
 	Sets variable $_name_ to _value_. You can use the new variable in the
 	arguments of future commands.