restore libosrm interface for corech, fallback to ch

include/contractor/contract_excludable_graph.hpp

@@ -12,8 +12,7 @@ namespace osrm
 namespace contractor
 {
 
-using GraphFilterAndCore =
-    std::tuple<QueryGraph, std::vector<std::vector<bool>>>;
+using GraphFilterAndCore = std::tuple<QueryGraph, std::vector<std::vector<bool>>>;
 
 inline auto contractExcludableGraph(ContractorGraph contractor_graph_,
                                     std::vector<EdgeWeight> node_weights,
@@ -38,10 +37,8 @@ inline auto contractExcludableGraph(ContractorGraph contractor_graph_,
         // a very dense core. This increases the overall graph sizes a little bit
         // but increases the final CH quality and contraction speed.
         constexpr float BASE_CORE = 0.9;
-        is_shared_core = contractGraph(contractor_graph,
-                                       std::move(always_allowed),
-                                       node_weights,
-                                       BASE_CORE);
+        is_shared_core =
+            contractGraph(contractor_graph, std::move(always_allowed), node_weights, BASE_CORE);
 
         // Add all non-core edges to container
         {

include/contractor/contractor_config.hpp

@@ -61,6 +61,7 @@ struct ContractorConfig final : storage::IOConfig
 
     updater::UpdaterConfig updater_config;
 
+    // DEPRECATED to be removed in v6.0
     bool use_cached_priority;
 
     unsigned requested_num_threads;

include/engine/engine_config.hpp

@@ -57,16 +57,14 @@ namespace engine
  *
  * You can chose between three algorithms:
  *  - Algorithm::CH
- *    Contraction Hierarchies, extremely fast queries but slow pre-processing. The default right
+ *      Contraction Hierarchies, extremely fast queries but slow pre-processing. The default right
  * now.
  *  - Algorithm::CoreCH
- *    Contractoin Hierachies with partial contraction for faster pre-processing but slower queries.
+ *      Deprecated, to be removed in v6.0
+ *      Contraction Hierachies with partial contraction for faster pre-processing but slower
+ * queries.
  *  - Algorithm::MLD
- *    Multi Level Dijkstra which is experimental and moderately fast in both pre-processing and
- * query.
- *
- * Algorithm::CH is specified we will automatically upgrade to CoreCH if we find the data for it.
- * If Algorithm::CoreCH is specified and we don't find the speedup data, we fail hard.
+ *      Multi Level Dijkstra, moderately fast in both pre-processing and query.
  *
  * \see OSRM, StorageConfig
  */
@@ -76,8 +74,8 @@ struct EngineConfig final
 
     enum class Algorithm
     {
-        CH,     // will upgrade to CoreCH if it finds core data
-        CoreCH, // will fail hard if there is no core data
+        CH,
+        CoreCH, // Deprecated, will be removed in v6.0
         MLD
     };
 

src/osrm/osrm.cpp

@@ -43,8 +43,14 @@ OSRM::OSRM(engine::EngineConfig &config)
     // Now, check that the algorithm requested can be used with the data
     // that's available.
 
-    if (config.algorithm == EngineConfig::Algorithm::CH)
+    if (config.algorithm == EngineConfig::Algorithm::CH ||
+        config.algorithm == EngineConfig::Algorithm::CoreCH)
     {
+        if (config.algorithm == EngineConfig::Algorithm::CoreCH)
+        {
+            util::Log(logWARNING) << "Using CoreCH is deprecated. Falling back to CH";
+            config.algorithm = EngineConfig::Algorithm::CH;
+        }
         bool ch_compatible = engine::Engine<CH>::CheckCompatibility(config);
 
         // throw error if dataset is not usable with CH

src/tools/contract.cpp

@@ -60,6 +60,12 @@ return_code parseArguments(int argc,
             &contractor_config.updater_config.turn_penalty_lookup_paths)
             ->composing(),
         "Lookup files containing from_, to_, via_nodes, and turn penalties to adjust turn weights")(
+        "level-cache,o",
+        boost::program_options::value<bool>(&contractor_config.use_cached_priority)
+            ->default_value(false),
+        "DEPRECATED: Will always be false. Use .level file to retain the contraction level for "
+        "each "
+        "node from the last run.")(
         "edge-weight-updates-over-factor",
         boost::program_options::value<double>(
             &contractor_config.updater_config.log_edge_updates_factor)

unit_tests/library/algorithm.cpp

@@ -15,6 +15,14 @@ BOOST_AUTO_TEST_CASE(test_incompatible_with_mld)
         osrm::exception);
 }
 
+BOOST_AUTO_TEST_CASE(test_compatible_with_corech_fallback)
+{
+    // Note - this tests that given the CoreCH algorithm config option, configuration falls back to
+    // CH and is compatible with CH data
+    BOOST_CHECK_NO_THROW(
+        getOSRM(OSRM_TEST_DATA_DIR "/ch/monaco.osrm", osrm::EngineConfig::Algorithm::CoreCH));
+}
+
 BOOST_AUTO_TEST_CASE(test_incompatible_with_ch)
 {
     // Can't use the CH algorithm with MLD data

unit_tests/library/tile.cpp

@@ -300,6 +300,16 @@ BOOST_AUTO_TEST_CASE(test_tile_ch)
     validate_tile(osrm);
 }
 
+BOOST_AUTO_TEST_CASE(test_tile_corech)
+{
+    // Note: this tests that given the CoreCH algorithm config option, configuration falls back to
+    // CH and is compatible with CH data
+    using namespace osrm;
+    auto osrm =
+        getOSRM(OSRM_TEST_DATA_DIR "/ch/monaco.osrm", osrm::EngineConfig::Algorithm::CoreCH);
+    validate_tile(osrm);
+}
+
 BOOST_AUTO_TEST_CASE(test_tile_mld)
 {
     using namespace osrm;
@@ -543,6 +553,17 @@ BOOST_AUTO_TEST_CASE(test_tile_turns_ch)
     test_tile_turns(osrm);
 }
 
+BOOST_AUTO_TEST_CASE(test_tile_turns_corech)
+{
+    // Note: this tests that given the CoreCH algorithm config option, configuration falls back to
+    // CH and is compatible with CH data
+    using namespace osrm;
+    auto osrm =
+        getOSRM(OSRM_TEST_DATA_DIR "/ch/monaco.osrm", osrm::EngineConfig::Algorithm::CoreCH);
+
+    test_tile_turns(osrm);
+}
+
 BOOST_AUTO_TEST_CASE(test_tile_turns_mld)
 {
     using namespace osrm;
@@ -724,6 +745,17 @@ BOOST_AUTO_TEST_CASE(test_tile_speeds_ch)
     test_tile_speeds(osrm);
 }
 
+BOOST_AUTO_TEST_CASE(test_tile_speeds_corech)
+{
+    // Note: this tests that given the CoreCH algorithm config option, configuration falls back to
+    // CH and is compatible with CH data
+    using namespace osrm;
+
+    auto osrm =
+        getOSRM(OSRM_TEST_DATA_DIR "/ch/monaco.osrm", osrm::EngineConfig::Algorithm::CoreCH);
+    test_tile_speeds(osrm);
+}
+
 BOOST_AUTO_TEST_CASE(test_tile_speeds_mld)
 {
     using namespace osrm;
@@ -820,6 +852,17 @@ BOOST_AUTO_TEST_CASE(test_tile_nodes_ch)
     test_tile_nodes(osrm);
 }
 
+BOOST_AUTO_TEST_CASE(test_tile_nodes_corech)
+{
+    // Note: this tests that given the CoreCH algorithm config option, configuration falls back to
+    // CH and is compatible with CH data
+    using namespace osrm;
+
+    auto osrm =
+        getOSRM(OSRM_TEST_DATA_DIR "/ch/monaco.osrm", osrm::EngineConfig::Algorithm::CoreCH);
+    test_tile_nodes(osrm);
+}
+
 BOOST_AUTO_TEST_CASE(test_tile_nodes_mld)
 {
     using namespace osrm;