From fb365b17ca339a25688ff61918280a46d64943b9 Mon Sep 17 00:00:00 2001
From: Klaus Aehlig <klaus.aehlig@huawei.com>
Date: Mon, 15 Jan 2024 10:06:48 +0100
Subject: Analysed target: keep track of implied export targets

... that are eligible for caching. In this way, we can accurately keep
track of the dependencies between target-level cache entries. Note
that it is enough to track the export targets eligible for caching,
as no target depending on an ineligible export target can be eligible.
---
 src/buildtool/build_engine/target_map/export.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/buildtool/build_engine/target_map/export.cpp')

diff --git a/src/buildtool/build_engine/target_map/export.cpp b/src/buildtool/build_engine/target_map/export.cpp
index 50238b26..a2215411 100644
--- a/src/buildtool/build_engine/target_map/export.cpp
+++ b/src/buildtool/build_engine/target_map/export.cpp
@@ -65,6 +65,13 @@ void FinalizeExport(
 
     std::unordered_set<std::string> vars_set{};
     vars_set.insert(vars.begin(), vars.end());
+    std::set<std::string> implied{};
+    if (target_cache_key) {
+        implied.insert((*value)->ImpliedExport().begin(),
+                       (*value)->ImpliedExport().end());
+        implied.insert(target_cache_key->Id().digest.hash());
+    }
+
     auto analysis_result = std::make_shared<AnalysedTarget const>(
         TargetResult{.artifact_stage = (*value)->Artifacts(),
                      .provides = provides,
@@ -74,6 +81,7 @@ void FinalizeExport(
         std::vector<Tree::Ptr>{},
         std::move(vars_set),
         std::set<std::string>{},
+        std::move(implied),
         std::move(deps_info));
     analysis_result = result_map->Add(target,
                                       effective_config,
@@ -151,6 +159,7 @@ void ExportRule(
                     std::unordered_set<std::string>{flexible_vars->begin(),
                                                     flexible_vars->end()},
                     std::set<std::string>{},
+                    entry.ToImplied(),
                     deps_info);
 
                 analysis_result = result_map->Add(key.target,
-- 
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