From 9a987188a38cc18f6a485bd5def16aded10fe1f6 Mon Sep 17 00:00:00 2001
From: Maksim Denisov <denisov.maksim@huawei.com>
Date: Tue, 25 Feb 2025 11:00:42 +0100
Subject: ArtifactBlob: Support incremental reading

---
 src/buildtool/common/artifact_blob.hpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/buildtool/common/artifact_blob.hpp')

diff --git a/src/buildtool/common/artifact_blob.hpp b/src/buildtool/common/artifact_blob.hpp
index d75a6b01..612f851f 100644
--- a/src/buildtool/common/artifact_blob.hpp
+++ b/src/buildtool/common/artifact_blob.hpp
@@ -22,6 +22,8 @@
 #include <utility>
 
 #include "src/buildtool/common/artifact_digest.hpp"
+#include "src/utils/cpp/expected.hpp"
+#include "src/utils/cpp/incremental_reader.hpp"
 
 class ArtifactBlob final {
   public:
@@ -52,6 +54,14 @@ class ArtifactBlob final {
     [[nodiscard]] auto ReadContent() const noexcept
         -> std::shared_ptr<std::string const>;
 
+    /// \brief Create an IncrementalReader that uses this ArtifactBlob's content
+    /// source.
+    /// \param chunk_size   Size of chunk, must be greater than 0.
+    /// \return Valid IncrementalReader on success or an error message on
+    /// failure.
+    [[nodiscard]] auto ReadIncrementally(std::size_t chunk_size) const& noexcept
+        -> expected<IncrementalReader, std::string>;
+
     /// \brief Set executable permission.
     void SetExecutable(bool is_executable) noexcept {
         is_executable_ = is_executable;
-- 
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