just-mr: support absent computed roots

2 files changed, 8 insertions, 1 deletions

diff --git a/src/other_tools/repo_map/repos_to_setup_map.cpp b/src/other_tools/repo_map/repos_to_setup_map.cpp
index 91a69c8b..a7cf8e1d 100644
--- a/src/other_tools/repo_map/repos_to_setup_map.cpp
+++ b/src/other_tools/repo_map/repos_to_setup_map.cpp
@@ -677,6 +677,7 @@ void PrecomputedRootCheckout(ExpressionPtr const& repo_desc,
                 ws_root.push_back(computed->target_module);
                 ws_root.push_back(computed->target_name);
                 ws_root.push_back(computed->config);
+                absent = computed->absent;
             }
             else if (auto tree_structure = result.AsTreeStructure()) {
                 ws_root.push_back(TreeStructureRoot::kMarker);
diff --git a/src/other_tools/utils/parse_precomputed_root.cpp b/src/other_tools/utils/parse_precomputed_root.cpp
index c5eebf90..df520158 100644
--- a/src/other_tools/utils/parse_precomputed_root.cpp
+++ b/src/other_tools/utils/parse_precomputed_root.cpp
@@ -81,12 +81,18 @@ namespace {
         return unexpected{fmt::format(
             "Unsupported value for key \"config\":\n{}", config->ToString())};
     }
+
+    auto absent = ParseAbsent(repository);
+    if (not absent.has_value()) {
+        return unexpected{std::move(absent).error()};
+    }
+
     return ComputedRoot{.repository = repo->String(),
                         .target_module = target_module->String(),
                         .target_name = target_module->String(),
                         .config = config.IsNotNull() ? config->ToJson()
                                                      : nlohmann::json::object(),
-                        .absent = false};
+                        .absent = *absent};
 }
 
 [[nodiscard]] auto ParseTreeStructureRoot(ExpressionPtr const& repository)