Move retry-related CLI parts into separate libraries

... to simplify reuse.

1 files changed, 51 insertions, 0 deletions

diff --git a/src/buildtool/common/retry_cli.hpp b/src/buildtool/common/retry_cli.hpp
new file mode 100644
index 00000000..53076252
--- /dev/null
+++ b/src/buildtool/common/retry_cli.hpp
@@ -0,0 +1,51 @@
+// Copyright 2024 Huawei Cloud Computing Technology Co., Ltd.
+//
+// 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 INCLUDED_SRC_BUILDTOOL_COMMON_RETRY_CLI_HPP
+#define INCLUDED_SRC_BUILDTOOL_COMMON_RETRY_CLI_HPP
+
+#include <optional>
+
+#include "CLI/CLI.hpp"
+#include "gsl/gsl"
+
+/// \brief Arguments required for tuning the retry strategy.
+struct RetryArguments {
+    std::optional<unsigned int> max_attempts{};
+    std::optional<unsigned int> initial_backoff_seconds{};
+    std::optional<unsigned int> max_backoff_seconds{};
+};
+
+static inline void SetupRetryArguments(
+    gsl::not_null<CLI::App*> const& app,
+    gsl::not_null<RetryArguments*> const& args) {
+    app->add_option(
+        "--max-attempts",
+        args->max_attempts,
+        "Total number of attempts in case of a remote resource becomes "
+        "unavailable. Must be greater than 0. (Default: 1)");
+    app->add_option(
+        "--initial-backoff-seconds",
+        args->initial_backoff_seconds,
+        "Initial amount of time, in seconds, to wait before retrying a rpc "
+        "call. The waiting time is doubled at each attempt. Must be greater "
+        "than 0. (Default: 1)");
+    app->add_option("--max-backoff-seconds",
+                    args->max_backoff_seconds,
+                    "The backoff time cannot be bigger than this parameter. "
+                    "Note that some jitter is still added to avoid to overload "
+                    "the resources that survived the outage. (Default: 60)");
+}
+
+#endif