Method SaveProgress

catboost/private/libs/algo/learn_context.cpp:359–372

void TLearnContext::SaveProgress(std::function<void(IOutputStream*)> onSaveSnapshot) {
    if (!OutputOptions.SaveSnapshot()) {
        return;
    }
    const auto snapshotBackup = Files.SnapshotFile + ".bak";
    TProgressHelper(ToString(ETaskType::CPU)).Write(
        snapshotBackup,
        [&](IOutputStream* out) {
            onSaveSnapshot(out);
            ::SaveMany(out, *LearnProgress, Profile.DumpProfileInfo());
        }
    );
    TFsPath(snapshotBackup).ForceRenameTo(Files.SnapshotFile);
}

bool TLearnContext::TryLoadProgress(std::function<bool(IInputStream*)> onLoadSnapshot) {
    if (!OutputOptions.SaveSnapshot() || !NFs::Exists(Files.SnapshotFile)) {