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.
2026-09-13 01:10:44 +03:00 · 2022-10-07 10:47:04 +02:00
commit 4326e972ac
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+/*
+ * 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 COMMON_STATUS_H_
+#define COMMON_STATUS_H_
+
+#include "absl/status/status.h"
+#include "absl/strings/str_cat.h"
+#include "absl/strings/str_format.h"
+#include "common/platform.h"
+
+namespace cdc_ft {
+
+//
+// Convenience helper functions for status creation.
+//
+
+inline absl::Status MakeStatus(const char* message) {
+  return absl::InternalError(message);
+}
+
+template <typename... Args>
+absl::Status MakeStatus(const absl::FormatSpec<Args...>& format, Args... args) {
+  return absl::InternalError(absl::StrFormat(format, args...));
+}
+
+// Convenience helper for cases that may or may not have a message to wrap.
+template <typename... Args>
+absl::Status WrapStatus(absl::Status inner_status) {
+  return inner_status;
+}
+
+// Returns OK if |inner_status| is OK and a copy of |inner_status| with given
+// message + |inner_status|'s message otherwise.
+template <typename... Args>
+absl::Status WrapStatus(absl::Status inner_status,
+                        const absl::FormatSpec<Args...>& format, Args... args) {
+  if (inner_status.ok()) {
+    return inner_status;
+  }
+
+  std::string message = absl::StrFormat(format, args...);
+  absl::Status wrapped_status(
+      inner_status.code(), absl::StrCat(inner_status.message(), "; ", message));
+  inner_status.ForEachPayload(
+      [&wrapped_status](absl::string_view key, const absl::Cord& value) {
+        wrapped_status.SetPayload(key, value);
+      });
+  return wrapped_status;
+}
+
+//
+// Tags attached to absl::Status to allow more fine-grained error handling.
+//
+
+enum class Tag : uint8_t {
+  // Sending end of the socket was closed, so receiving end can no longer read.
+  kSocketEof = 0,
+
+  // Bind failed, probably because there's another instance of cdc_rsync
+  // running.
+  kAddressInUse = 1,
+
+  // The gamelet components need to be re-deployed.
+  kDeployServer = 2,
+
+  // Something asks for user input, but we're in quiet mode.
+  kInstancePickerNotAvailableInQuietMode = 3,
+
+  // Timeout while trying to connect to the gamelet component.
+  kConnectionTimeout = 4,
+
+  // MUST BE LAST.
+  kCount = 5,
+};
+
+// Tags a status. No-op if |status| is OK. Overwrites existing tags.
+absl::Status SetTag(absl::Status status, Tag tag);
+
+// Returns the associated tag. Empty if none.
+absl::optional<Tag> GetTag(const absl::Status& status);
+
+// Checks whether the status has a certain tag.
+bool HasTag(const absl::Status& status, Tag tag);
+
+}  // namespace cdc_ft
+
+#endif  // COMMON_STATUS_H_