Releasing the former Stadia file transfer tools

The tools allow efficient and fast synchronization of large directory
trees from a Windows workstation to a Linux target machine.

cdc_rsync* support efficient copy of files by using content-defined
chunking (CDC) to identify chunks within files that can be reused.

asset_stream_manager + cdc_fuse_fs support efficient streaming of a
local directory to a remote virtual file system based on FUSE. It also
employs CDC to identify and reuse unchanged data chunks.

cdc_rsync_cli/params.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef CDC_RSYNC_CLI_PARAMS_H_
+#define CDC_RSYNC_CLI_PARAMS_H_
+
+#include <string>
+#include <vector>
+
+#include "cdc_rsync/cdc_rsync.h"
+
+namespace cdc_ft {
+namespace params {
+
+// All cdc_rsync command line parameters.
+struct Parameters {
+  // Copy of cdc_ft::FilterRule with std::string instead of const char*.
+  struct FilterRule {
+    using Type = ::cdc_ft::FilterRule::Type;
+    FilterRule(Type type, std::string pattern)
+        : type(type), pattern(std::move(pattern)) {}
+    Type type;
+    std::string pattern;
+  };
+
+  Options options;
+  std::vector<FilterRule> filter_rules;
+  std::vector<std::string> sources;
+  std::string destination;
+  const char* files_from = nullptr;
+  std::string sources_dir;  // Base directory for files loaded for --files-from.
+};
+
+// Parses sources, destination and options from the command line args.
+// Prints a help text if not enough arguments were given or -h/--help was given.
+bool Parse(int argc, const char* const* argv, Parameters* parameters);
+
+}  // namespace params
+}  // namespace cdc_ft
+
+#endif  // CDC_RSYNC_CLI_PARAMS_H_