[parser] Forgot to add shuffle.h/.c

src/shuffle.c

@@ -0,0 +1,24 @@
+#include "shuffle.h"
+
+#include <config.h>
+#include "string_utils.h"
+
+bool shuffle_file(char *filename) {
+    char *shuffle_command = NULL;
+
+    #if defined(HAVE_SHUF)
+    shuffle_command = "shuf";
+    #else
+    return false;
+    #endif
+
+    char_array *command = char_array_new();
+
+    char_array_cat_printf(command, "%s -o %s %s", shuffle_command, filename, filename);
+
+    int ret = system(char_array_get_string(command));
+
+    char_array_destroy(command);
+
+    return ret == EXIT_SUCCESS;
+}