Test That Failed Vendor Loads Are Not Kept and the Library Base Is Reused

Cover the two cache paths the first test left open: a vendor tree that fails to load is retried on the next resolution instead of being served from the cache, and a type-probed filament resolved through resolve_preset_config_type reuses the OrcaFilamentLibrary base already loaded for a sibling.

src/OrcaSlicer.cpp

@@ -2010,19 +2010,21 @@ int CLI::run(int argc, char **argv)
         }
     };
 
-    auto resolve_preset = [&ensure_cli_preset_bundle](const std::string &file, DynamicPrintConfig &config,
+    // One resolver for the whole run, so presets from the same vendor tree share its load.
+    std::unique_ptr<PresetBundle> system_preset_resolver;
+    auto resolve_preset = [&ensure_cli_preset_bundle, &system_preset_resolver](const std::string &file, DynamicPrintConfig &config,
                                                                                std::string &config_type, const std::string &config_from,
                                                                                bool probe_type, std::string &error) {
         const auto *inherits = config.option<ConfigOptionString>(BBL_JSON_KEY_INHERITS);
         if (!probe_type && (inherits == nullptr || inherits->value.empty()))
             return true;
 
-        std::unique_ptr<PresetBundle> source_bundle;
         PresetBundle                 *bundle = nullptr;
         bool                          allow_source_manifest = false;
         if (config_from == "system") {
-            source_bundle         = std::make_unique<PresetBundle>();
+            if (!system_preset_resolver)
-            bundle                = source_bundle.get();
+                system_preset_resolver = std::make_unique<PresetBundle>();
+            bundle                = system_preset_resolver.get();
             allow_source_manifest = true;
         } else {
             bundle = ensure_cli_preset_bundle(error);

src/libslic3r/PresetBundle.cpp

@@ -549,30 +549,11 @@ bool PresetBundle::resolve_preset_config(DynamicPrintConfig &config, Preset::Typ
             continue;
 
         try {
-            PresetBundle library_bundle;
+            const SourceManifestBundles *loaded = load_source_manifest(root_dir, vendor_id, compatibility_rule, error);
-            const PresetBundle *base_bundle = nullptr;
+            if (loaded == nullptr)
-            if (vendor_id != ORCA_FILAMENT_LIBRARY &&
-                boost::filesystem::is_regular_file(root_dir / (std::string(ORCA_FILAMENT_LIBRARY) + ".json"))) {
-                library_bundle.m_preserve_vendor_source_paths = true;
-                library_bundle.load_vendor_configs_from_json(root_dir.string(), ORCA_FILAMENT_LIBRARY, LoadSystem,
-                                                             compatibility_rule, nullptr, false);
-                if (library_bundle.error_count() != 0) {
-                    error = "OrcaFilamentLibrary contains invalid presets";
-                    return false;
-                }
-                base_bundle = &library_bundle;
-            }
-
-            PresetBundle source_bundle;
-            source_bundle.m_preserve_vendor_source_paths = true;
-            source_bundle.load_vendor_configs_from_json(root_dir.string(), vendor_id, LoadSystem,
-                                                        compatibility_rule, base_bundle, false);
-            if (source_bundle.error_count() != 0) {
-                error = "Vendor bundle contains invalid presets";
                 return false;
-            }
 
-            const Preset *resolved = find_loaded(source_bundle);
+            const Preset *resolved = find_loaded(*loaded->vendor);
             if (resolved == nullptr) {
                 if (error.empty())
                     error = "Source file is not an instantiated preset in its vendor manifest";
@@ -591,6 +572,39 @@ bool PresetBundle::resolve_preset_config(DynamicPrintConfig &config, Preset::Typ
     return false;
 }
 
+const PresetBundle::SourceManifestBundles *PresetBundle::load_source_manifest(const boost::filesystem::path &root_dir,
+                                                                            const std::string &vendor_id,
+                                                                            ForwardCompatibilitySubstitutionRule compatibility_rule,
+                                                                            std::string &error)
+{
+    auto key = std::make_tuple(root_dir.string(), vendor_id, static_cast<int>(compatibility_rule));
+    if (auto it = m_source_manifest_bundles.find(key); it != m_source_manifest_bundles.end())
+        return &it->second;
+
+    SourceManifestBundles loaded;
+    if (vendor_id != ORCA_FILAMENT_LIBRARY &&
+        boost::filesystem::is_regular_file(root_dir / (std::string(ORCA_FILAMENT_LIBRARY) + ".json"))) {
+        loaded.library = std::make_unique<PresetBundle>();
+        loaded.library->m_preserve_vendor_source_paths = true;
+        loaded.library->load_vendor_configs_from_json(root_dir.string(), ORCA_FILAMENT_LIBRARY, LoadSystem,
+                                                      compatibility_rule, nullptr, false);
+        if (loaded.library->error_count() != 0) {
+            error = "OrcaFilamentLibrary contains invalid presets";
+            return nullptr;
+        }
+    }
+
+    loaded.vendor = std::make_unique<PresetBundle>();
+    loaded.vendor->m_preserve_vendor_source_paths = true;
+    loaded.vendor->load_vendor_configs_from_json(root_dir.string(), vendor_id, LoadSystem,
+                                                 compatibility_rule, loaded.library.get(), false);
+    if (loaded.vendor->error_count() != 0) {
+        error = "Vendor bundle contains invalid presets";
+        return nullptr;
+    }
+    return &m_source_manifest_bundles.emplace(std::move(key), std::move(loaded)).first->second;
+}
+
 bool PresetBundle::resolve_preset_config_type(DynamicPrintConfig &config, Preset::Type &type,
                                               const std::string &source_file,
                                               ForwardCompatibilitySubstitutionRule compatibility_rule,

src/libslic3r/PresetBundle.hpp

@@ -11,6 +11,7 @@
 #include <map>
 #include <set>
 #include <shared_mutex>
+#include <tuple>
 #include <unordered_map>
 #include <optional>
 #include <array>
@@ -652,6 +653,19 @@ private:
     bool m_generate_vendor_caches { false };
     bool m_preserve_vendor_source_paths { false };
 
+    // Vendor trees loaded by resolve_preset_config's manifest path, so every preset
+    // resolved through this bundle shares one load per source root and vendor.
+    struct SourceManifestBundles {
+        std::unique_ptr<PresetBundle> library;
+        std::unique_ptr<PresetBundle> vendor;
+    };
+    std::map<std::tuple<std::string, std::string, int>, SourceManifestBundles> m_source_manifest_bundles;
+
+    const SourceManifestBundles *load_source_manifest(const boost::filesystem::path &root_dir,
+                                                      const std::string &vendor_id,
+                                                      ForwardCompatibilitySubstitutionRule compatibility_rule,
+                                                      std::string &error);
+
     // Orca: validation only - flag any printer with two or more compatible
     // filament presets sharing one filament_id (ambiguous AMS subtype match).
     bool check_duplicate_filament_subtypes() const;

tests/libslic3r/test_preset_bundle_loading.cpp

@@ -987,6 +987,137 @@ TEST_CASE("Resolution terminates when no vendor manifest exists", "[Preset][Bund
     CHECK(error == "Preset was not found in the loaded bundle");
 }
 
+TEST_CASE("Manifest-backed resolution reuses the vendor tree it already loaded", "[Preset][Bundle][Regression]")
+{
+    ScopedTemporaryDir dir;
+    const fs::path      process_dir = dir.path() / "Acme" / "process";
+    fs::create_directories(process_dir);
+    std::ofstream((dir.path() / "Acme.json").string())
+        << R"({"version":"1.0.0","name":"Acme","process_list":[)"
+        << R"({"name":"fdm_process_common","sub_path":"process/base.json"},)"
+        << R"({"name":"Acme First","sub_path":"process/first.json"},)"
+        << R"({"name":"Acme Second","sub_path":"process/second.json"}]})";
+    auto write_base = [&](double travel_speed) {
+        std::ofstream((process_dir / "base.json").string())
+            << R"({"type":"process","name":"fdm_process_common","from":"system",)"
+            << R"("instantiation":"false","travel_speed":[")" << travel_speed << R"("]})";
+    };
+    auto write_child = [&](const std::string &file, const std::string &name) {
+        std::ofstream((process_dir / file).string())
+            << R"({"type":"process","name":")" << name << R"(","from":"system",)"
+            << R"("instantiation":"true","inherits":"fdm_process_common"})";
+    };
+    write_base(111.0);
+    write_child("first.json", "Acme First");
+    write_child("second.json", "Acme Second");
+
+    auto travel_speed = [&](PresetBundle &bundle, const std::string &file) {
+        DynamicPrintConfig raw;
+        raw.option<ConfigOptionString>(BBL_JSON_KEY_INHERITS, true)->value = "fdm_process_common";
+        std::string error;
+        REQUIRE(bundle.resolve_preset_config(raw, Preset::TYPE_PRINT, (process_dir / file).string(),
+                                             ForwardCompatibilitySubstitutionRule::EnableSilent, error));
+        return raw.option<ConfigOptionFloats>("travel_speed")->values.front();
+    };
+
+    PresetBundle bundle;
+    CHECK_THAT(travel_speed(bundle, "first.json"), Catch::Matchers::WithinAbs(111.0, 1e-6));
+
+    // Only a reload would see this change.
+    write_base(222.0);
+    CHECK_THAT(travel_speed(bundle, "second.json"), Catch::Matchers::WithinAbs(111.0, 1e-6));
+
+    PresetBundle fresh;
+    CHECK_THAT(travel_speed(fresh, "second.json"), Catch::Matchers::WithinAbs(222.0, 1e-6));
+}
+
+TEST_CASE("Manifest-backed resolution does not keep a vendor tree that failed to load", "[Preset][Bundle][Regression]")
+{
+    ScopedTemporaryDir dir;
+    const fs::path      child_file = dir.path() / "Acme" / "process" / "child.json";
+    auto write_manifest = [&](const std::string &leading_entry) {
+        std::ofstream((dir.path() / "Acme.json").string())
+            << R"({"version":"1.0.0","name":"Acme","process_list":[)" << leading_entry
+            << R"({"name":"Acme Process","sub_path":"process/child.json"}]})";
+    };
+    write_manifest("123,");
+    fs::create_directories(child_file.parent_path());
+    std::ofstream(child_file.string())
+        << R"({"type":"process","name":"Acme Process","from":"system",)"
+        << R"("instantiation":"true","layer_height":"0.2"})";
+
+    PresetBundle bundle;
+    auto resolve = [&](std::string &error) {
+        DynamicPrintConfig raw;
+        raw.option<ConfigOptionString>(BBL_JSON_KEY_INHERITS, true)->value = "fdm_process_common";
+        return bundle.resolve_preset_config(raw, Preset::TYPE_PRINT, child_file.string(),
+                                            ForwardCompatibilitySubstitutionRule::EnableSilent, error);
+    };
+
+    std::string error;
+    CHECK_FALSE(resolve(error));
+    CHECK_FALSE(error.empty());
+
+    write_manifest("");
+    error.clear();
+    CHECK(resolve(error));
+    CHECK(error.empty());
+}
+
+TEST_CASE("Manifest-backed resolution reuses the library base for type-probed files", "[Preset][Bundle][Regression]")
+{
+    ScopedTemporaryDir dir;
+    const fs::path      library_pet  = dir.path() / PresetBundle::ORCA_FILAMENT_LIBRARY / "filament" / "pet.json";
+    const fs::path      filament_dir = dir.path() / "Acme" / "filament";
+
+    std::ofstream((dir.path() / (std::string(PresetBundle::ORCA_FILAMENT_LIBRARY) + ".json")).string())
+        << R"({"version":"1.0.0","name":"OrcaFilamentLibrary","filament_list":[)"
+        << R"({"name":"fdm_filament_pet","sub_path":"filament/pet.json","filament_id":"GFL99"}]})";
+    fs::create_directories(library_pet.parent_path());
+    auto write_library_pet = [&](double density) {
+        std::ofstream(library_pet.string())
+            << R"({"type":"filament","name":"fdm_filament_pet","from":"system",)"
+            << R"("filament_id":"GFL99","instantiation":"false",)"
+            << R"("filament_type":["PETG"],"filament_density":[")" << density << R"("]})";
+    };
+    write_library_pet(1.27);
+
+    std::ofstream((dir.path() / "Acme.json").string())
+        << R"({"version":"1.0.0","name":"Acme","filament_list":[)"
+        << R"({"name":"Acme PETG","sub_path":"filament/petg.json","filament_id":"GFA00"},)"
+        << R"({"name":"Acme PETG Matte","sub_path":"filament/petg_matte.json","filament_id":"GFA01"}]})";
+    fs::create_directories(filament_dir);
+    auto write_child = [&](const std::string &file, const std::string &name, const std::string &filament_id) {
+        std::ofstream((filament_dir / file).string())
+            << R"({"type":"filament","name":")" << name << R"(","from":"system",)"
+            << R"("filament_id":")" << filament_id << R"(","instantiation":"true","inherits":"fdm_filament_pet"})";
+    };
+    write_child("petg.json", "Acme PETG", "GFA00");
+    write_child("petg_matte.json", "Acme PETG Matte", "GFA01");
+
+    auto density = [](const DynamicPrintConfig &config) {
+        return config.option<ConfigOptionFloats>("filament_density")->values.front();
+    };
+
+    PresetBundle       bundle;
+    DynamicPrintConfig first;
+    first.option<ConfigOptionString>(BBL_JSON_KEY_INHERITS, true)->value = "fdm_filament_pet";
+    std::string error;
+    REQUIRE(bundle.resolve_preset_config(first, Preset::TYPE_FILAMENT, (filament_dir / "petg.json").string(),
+                                         ForwardCompatibilitySubstitutionRule::EnableSilent, error));
+    CHECK_THAT(density(first), Catch::Matchers::WithinAbs(1.27, 1e-6));
+
+    // Only a reload would see this change.
+    write_library_pet(1.5);
+
+    DynamicPrintConfig second;
+    Preset::Type       type = Preset::TYPE_INVALID;
+    REQUIRE(bundle.resolve_preset_config_type(second, type, (filament_dir / "petg_matte.json").string(),
+                                              ForwardCompatibilitySubstitutionRule::EnableSilent, error));
+    CHECK(type == Preset::TYPE_FILAMENT);
+    CHECK_THAT(density(second), Catch::Matchers::WithinAbs(1.27, 1e-6));
+}
+
 // Orca: a filament in the Orca Filament Library that names its compatible printers has to hide the generic
 // library filament sharing its alias, the same way a vendor owned filament does. Otherwise both are compatible
 // with that printer and the plater combo box lists the shared alias twice.