GN generator for GYP actions

tools/gn/filesystem_utils.h

 // Copyright (c) 2013 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.
 
 #ifndef TOOLS_GN_FILESYSTEM_UTILS_H_
 #define TOOLS_GN_FILESYSTEM_UTILS_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
@@ skipping 120 matching lines @@
 // Converts slashes to backslashes for Windows. Keeps the string unchanged
 // for other systems.
 void ConvertPathToSystem(std::string* path);
 std::string PathToSystem(const std::string& path);
 
 // Takes a source-absolute path (must begin with "//") and makes it relative
 // to the given directory, which also must be source-absolute.
 std::string RebaseSourceAbsolutePath(const std::string& input,
                                      const SourceDir& dest_dir);
 
+// Returns the given directory with no terminating slash at the end, such that
+// appending a slash and more stuff will produce a valid path.
+//
+// If the directory refers to either the source or system root, we'll append
+// a "." so this remains valid.
+std::string DirectoryWithNoLastSlash(const SourceDir& dir);
+
+// -----------------------------------------------------------------------------
+
+// These functions return the various flavors of output and gen directories.
+SourceDir GetToolchainOutputDir(const Settings* settings);
+SourceDir GetToolchainGenDir(const Settings* settings);
+SourceDir GetOutputDirForSourceDir(const Settings* settings,
+                                   const SourceDir& source_dir);
+SourceDir GetGenDirForSourceDir(const Settings* settings,
+                                const SourceDir& source_dir);
+SourceDir GetTargetOutputDir(const Target* target);
+SourceDir GetTargetGenDir(const Target* target);
+SourceDir GetCurrentOutputDir(const Scope* scope);
+SourceDir GetCurrentGenDir(const Scope* scope);
+
 #endif  // TOOLS_GN_FILESYSTEM_UTILS_H_