Command-line tool to generate a newly versioned mini_installer.exe

chrome/installer/test/alternate_version_generator.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This file exposes the public interface to the mini_installer re-versioner.
 
 #ifndef CHROME_INSTALLER_TEST_ALTERNATE_VERSION_GENERATOR_H_
 #define CHROME_INSTALLER_TEST_ALTERNATE_VERSION_GENERATOR_H_
 #pragma once
 
 #include <string>
 
 class FilePath;
 
 namespace upgrade_test {
 
+enum Direction {
+  PREVIOUS_VERSION,
+  NEXT_VERSION
+};
+
 // Generates an alternate mini_installer.exe using the one indicated by
-// |original_installer_path|, giving the new one a higher version than the
-// original and placing it in |target_path|.  Any previous file at |target_path|
-// is clobbered.  Returns true on success.
-bool GenerateNextVersion(const FilePath& original_installer_path,
-                         const FilePath& target_path);
+// |original_installer_path|, giving the new one a lower or higher version than
+// the original and placing it in |target_path|.  Any previous file at
+// |target_path| is clobbered.  Returns true on success.  |original_version| and
+// |new_version|, when non-NULL, are given the original and new version numbers
+// on success.
+bool GenerateAlternateVersion(const FilePath& original_installer_path,
+                              const FilePath& target_path,
+                              Direction direction,
+                              std::wstring* original_version,
+                              std::wstring* new_version);
 
 }  // namespace upgrade_test
 
 #endif  // CHROME_INSTALLER_TEST_ALTERNATE_VERSION_GENERATOR_H_