4 files changed, 47 insertions, 3 deletions
diff --git a/src/other_tools/just_mr/TARGETS b/src/other_tools/just_mr/TARGETS
index a3ed87c9..d98d2e60 100644
--- a/src/other_tools/just_mr/TARGETS
+++ b/src/other_tools/just_mr/TARGETS
@@ -66,11 +66,11 @@
     , ["src/buildtool/common", "clidefaults"]
     , ["src/buildtool/common", "user_structs"]
     , ["src/buildtool/execution_api/local", "config"]
-    , ["src/other_tools/just_mr", "utils"]
     , ["src/buildtool/logging", "log_level"]
+    , "mirrors"
+    , "utils"
     ]
   , "stage": ["src", "other_tools", "just_mr"]
-  , "private-deps": [["src/buildtool/logging", "logging"]]
   }
 , "setup_utils":
   { "type": ["@", "rules", "CC", "library"]
@@ -186,4 +186,11 @@
     , "setup_utils"
     ]
   }
+, "mirrors":
+  { "type": ["@", "rules", "CC", "library"]
+  , "name": ["mirrors"]
+  , "hdrs": ["mirrors.hpp"]
+  , "deps": [["@", "json", "", "json"]]
+  , "stage": ["src", "other_tools", "just_mr"]
+  }
 }
diff --git a/src/other_tools/just_mr/cli.hpp b/src/other_tools/just_mr/cli.hpp
index adc72578..0031cd4e 100644
--- a/src/other_tools/just_mr/cli.hpp
+++ b/src/other_tools/just_mr/cli.hpp
@@ -29,6 +29,7 @@
 #include "src/buildtool/common/user_structs.hpp"
 #include "src/buildtool/execution_api/local/config.hpp"
 #include "src/buildtool/logging/log_level.hpp"
+#include "src/other_tools/just_mr/mirrors.hpp"
 #include "src/other_tools/just_mr/utils.hpp"
 
 /// \brief Arguments common to all just-mr subcommands
@@ -38,6 +39,7 @@ struct MultiRepoCommonArguments {
     std::optional<std::filesystem::path> checkout_locations_file{std::nullopt};
     std::vector<std::string> explicit_distdirs{};
     LocalPathsPtr just_mr_paths = std::make_shared<LocalPaths>();
+    MirrorsPtr alternative_mirrors = std::make_shared<Mirrors>();
     std::optional<std::vector<std::string>> local_launcher{std::nullopt};
     CAInfoPtr ca_info = std::make_shared<CAInfo>();
     std::optional<std::filesystem::path> just_path{std::nullopt};
diff --git a/src/other_tools/just_mr/main.cpp b/src/other_tools/just_mr/main.cpp
index 1e8905d6..47ec2633 100644
--- a/src/other_tools/just_mr/main.cpp
+++ b/src/other_tools/just_mr/main.cpp
@@ -676,7 +676,7 @@ auto main(int argc, char* argv[]) -> int {
                 kDefaultDistdirs);
         }
 
-        // read checkout locations
+        // read checkout locations and alternative mirrors
         if (arguments.common.checkout_locations_file) {
             try {
                 std::ifstream ifs(*arguments.common.checkout_locations_file);
@@ -685,6 +685,12 @@ auto main(int argc, char* argv[]) -> int {
                     checkout_locations_json
                         .value("checkouts", nlohmann::json::object())
                         .value("git", nlohmann::json::object());
+                arguments.common.alternative_mirrors->local_mirrors =
+                    checkout_locations_json.value("local mirrors",
+                                                  nlohmann::json::object());
+                arguments.common.alternative_mirrors->preferred_hostnames =
+                    checkout_locations_json.value("preferred hostnames",
+                                                  nlohmann::json::array());
             } catch (std::exception const& e) {
                 Logger::Log(
                     LogLevel::Error,
diff --git a/src/other_tools/just_mr/mirrors.hpp b/src/other_tools/just_mr/mirrors.hpp
new file mode 100644
index 00000000..d59300c5
--- /dev/null
+++ b/src/other_tools/just_mr/mirrors.hpp
@@ -0,0 +1,29 @@
+// Copyright 2023 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_OTHER_TOOLS_JUST_MR_MIRRORS_HPP
+#define INCLUDED_SRC_OTHER_TOOLS_JUST_MR_MIRRORS_HPP
+
+#include <memory>
+
+#include "nlohmann/json.hpp"
+
+struct Mirrors {
+    nlohmann::json local_mirrors{};        // maps URLs to list of local mirrors
+    nlohmann::json preferred_hostnames{};  // list of mirror hostnames
+};
+
+using MirrorsPtr = std::shared_ptr<Mirrors>;
+
+#endif  // INCLUDED_SRC_OTHER_TOOLS_JUST_MR_MIRRORS_HPP