From 7571f74dbc53e9b4fe3b9000662ca686960db78e Mon Sep 17 00:00:00 2001
From: Paul Cristian Sarbu <paul.cristian.sarbu@huawei.com>
Date: Mon, 23 Sep 2024 12:09:44 +0200
Subject: StorageUtils: Add generation-aware rehashing ID file map

Such a file could be used to store mappings of digests from CAS or
Git cache to digests of different hash type that represent same
content.
---
 src/buildtool/crypto/hash_function.hpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/buildtool/crypto/hash_function.hpp')

diff --git a/src/buildtool/crypto/hash_function.hpp b/src/buildtool/crypto/hash_function.hpp
index 9e5a9c0b..530e0b2b 100644
--- a/src/buildtool/crypto/hash_function.hpp
+++ b/src/buildtool/crypto/hash_function.hpp
@@ -95,4 +95,15 @@ class HashFunction {
         -> std::optional<std::pair<Hasher::HashDigest, std::uintmax_t>>;
 };
 
+[[nodiscard]] constexpr auto ToString(HashFunction::Type type) noexcept -> const
+    char* {
+    switch (type) {
+        case HashFunction::Type::GitSHA1:
+            return "git-SHA1";
+        case HashFunction::Type::PlainSHA256:
+            return "plain-SHA256";
+    }
+    Ensures(false);  // unreachable
+}
+
 #endif  // INCLUDED_SRC_BUILDTOOL_CRYPTO_HASH_FUNCTION_HPP
-- 
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