Add output stream overload for file_order_mode

CMakeLists.txt

@@ -100,6 +100,7 @@ list(
   src/dwarfs/metadata.cpp
   src/dwarfs/metadata_writer.cpp
   src/dwarfs/mmap.cpp
+  src/dwarfs/options.cpp
   src/dwarfs/os_access_posix.cpp
   src/dwarfs/progress.cpp
   src/dwarfs/scanner.cpp

include/dwarfs/options.h

@@ -21,6 +21,8 @@
 
 #pragma once
 
+#include <ostream>
+
 namespace dwarfs {
 
 struct block_cache_options {
@@ -31,6 +33,8 @@ struct block_cache_options {
 
 enum class file_order_mode { NONE, PATH, SCRIPT, SIMILARITY };
 
+std::ostream& operator<<(std::ostream& os, file_order_mode mode);
+
 struct scanner_options {
   file_order_mode file_order;
 };

src/dwarfs/options.cpp

@@ -0,0 +1,49 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/**
+ * \author     Marcus Holland-Moritz (github@mhxnet.de)
+ * \copyright  Copyright (c) Marcus Holland-Moritz
+ *
+ * This file is part of dwarfs.
+ *
+ * dwarfs is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * dwarfs is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with dwarfs.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "dwarfs/options.h"
+
+namespace dwarfs {
+
+std::ostream& operator<<(std::ostream& os, file_order_mode mode) {
+  std::string modestr{"unknown"};
+
+  switch (mode) {
+  case file_order_mode::NONE:
+    modestr = "none";
+    break;
+  case file_order_mode::PATH:
+    modestr = "path";
+    break;
+  case file_order_mode::SCRIPT:
+    modestr = "script";
+    break;
+  case file_order_mode::SIMILARITY:
+    modestr = "similarity";
+    break;
+  default:
+    break;
+  }
+
+  return os << modestr;
+}
+
+} // namespace dwarfs