First pass at port settings

scripts/get_triplet_environment.cmake

@@ -1,4 +1,7 @@
 include(${CMAKE_TRIPLET_FILE})
+if (DEFINED CMAKE_PORTFILE_SETTINGS)
+    include(${CMAKE_PORTFILE_SETTINGS} OPTIONAL)
+endif()
 
 # GUID used as a flag - "cut here line"
 message("c35112b6-d1ba-415b-aa5d-81de856ef8eb")

toolsrc/include/vcpkg/build.h

@@ -140,29 +140,6 @@ namespace vcpkg::Build
        {"VCPKG_ENV_PASSTHROUGH", VcpkgTripletVar::ENV_PASSTHROUGH},
    };
 
-    /// <summary>
-    /// Settings from the triplet file which impact the build environment and post-build checks
-    /// </summary>
-    struct PreBuildInfo
-    {
-        /// <summary>
-        /// Runs the triplet file in a "capture" mode to create a PreBuildInfo
-        /// </summary>
-        static PreBuildInfo from_triplet_file(const VcpkgPaths& paths, const Triplet& triplet);
-
-        std::string triplet_abi_tag;
-        std::string target_architecture;
-        std::string cmake_system_name;
-        std::string cmake_system_version;
-        Optional<std::string> platform_toolset;
-        Optional<fs::path> visual_studio_path;
-        Optional<std::string> external_toolchain_file;
-        Optional<ConfigurationType> build_type;
-        std::vector<std::string> passthrough_env_vars;
-    };
-
-    std::string make_build_env_cmd(const PreBuildInfo& pre_build_info, const Toolset& toolset);
-
     struct ExtendedBuildResult
     {
         ExtendedBuildResult(BuildResult code);
@@ -200,6 +177,31 @@ namespace vcpkg::Build
                                       const BuildPackageConfig& config,
                                       const StatusParagraphs& status_db);
 
+    /// <summary>
+    /// Settings from the triplet file which impact the build environment and post-build checks
+    /// </summary>
+    struct PreBuildInfo
+    {
+        /// <summary>
+        /// Runs the triplet file in a "capture" mode to create a PreBuildInfo
+        /// </summary>
+        static PreBuildInfo from_triplet_file(const VcpkgPaths& paths,
+                const Triplet& triplet,
+                Optional<const std::string&> port = nullopt);
+
+        std::string triplet_abi_tag;
+        std::string target_architecture;
+        std::string cmake_system_name;
+        std::string cmake_system_version;
+        Optional<std::string> platform_toolset;
+        Optional<fs::path> visual_studio_path;
+        Optional<std::string> external_toolchain_file;
+        Optional<ConfigurationType> build_type;
+        std::vector<std::string> passthrough_env_vars;
+    };
+
+    std::string make_build_env_cmd(const PreBuildInfo& pre_build_info, const Toolset& toolset);
+
     enum class BuildPolicy
     {
         EMPTY_PACKAGE,

toolsrc/src/vcpkg/build.cpp

@@ -782,7 +782,8 @@ namespace vcpkg::Build
                 AbiEntry{status_it->get()->package.spec.name(), status_it->get()->package.abi});
         }
 
-        const auto pre_build_info = PreBuildInfo::from_triplet_file(paths, triplet);
+        const auto pre_build_info =
+            PreBuildInfo::from_triplet_file(paths, triplet, config.scf.core_paragraph->name);
 
         auto maybe_abi_tag_and_file = compute_abi_tag(paths, config, pre_build_info, dependency_abis);
 
@@ -997,7 +998,9 @@ namespace vcpkg::Build
         return inner_create_buildinfo(*pghs.get());
     }
 
-    PreBuildInfo PreBuildInfo::from_triplet_file(const VcpkgPaths& paths, const Triplet& triplet)
+    PreBuildInfo PreBuildInfo::from_triplet_file(const VcpkgPaths& paths,
+                                                 const Triplet& triplet,
+                                                 Optional<const std::string&> port)
     {
         static constexpr CStringView FLAG_GUID = "c35112b6-d1ba-415b-aa5d-81de856ef8eb";
 
@@ -1005,11 +1008,19 @@ namespace vcpkg::Build
         const fs::path ports_cmake_script_path = paths.scripts / "get_triplet_environment.cmake";
         const fs::path triplet_file_path = paths.get_triplet_file_path(triplet);
 
+        std::vector<System::CMakeVariable> args{{"CMAKE_TRIPLET_FILE", triplet_file_path}};
+
+        if (port)
+        {
+            args.emplace_back(
+                    "CMAKE_PORT_SETTINGS",
+                    paths.ports / port.value_or_exit(VCPKG_LINE_INFO) / "port_settings.cmake");
+        }
+
         const auto cmd_launch_cmake = System::make_cmake_cmd(cmake_exe_path,
                                                              ports_cmake_script_path,
-                                                             {
+                                                             args);
-                                                                 {"CMAKE_TRIPLET_FILE", triplet_file_path},
+
-                                                             });
         const auto ec_data = System::cmd_execute_and_capture_output(cmd_launch_cmake);
         Checks::check_exit(VCPKG_LINE_INFO, ec_data.exit_code == 0, ec_data.output);
 

toolsrc/src/vcpkg/commands.ci.cpp

@@ -254,7 +254,14 @@ namespace vcpkg::Commands::CI
                                 return {spec.name(), it->second};
                         });
                     const auto& pre_build_info = pre_build_info_cache.get_lazy(
-                        triplet, [&]() { return Build::PreBuildInfo::from_triplet_file(paths, triplet); });
+                        triplet,
+                        [&]() {
+                            return Build::PreBuildInfo::from_triplet_file(
+                                    paths,
+                                    triplet,
+                                    scfl->source_control_file->core_paragraph->name);
+                        }
+                    );
 
                     auto maybe_tag_and_file =
                         Build::compute_abi_tag(paths, build_config, pre_build_info, dependency_abis);