feat(build): merge multiple build recipes

ecsact/cli/commands/build.cc

@@ -29,7 +29,7 @@ constexpr auto USAGE = R"docopt(Ecsact Build Command
 
 Usage:
   ecsact build (-h | --help)
-  ecsact build <files>... --recipe=<name> --output=<path> [--format=<type>] [--temp_dir=<path>] [--compiler_config=<path>] [--report_filter=<filter>]
+  ecsact build <files>... --recipe=<name>... --output=<path> [--allow-unresolved-imports] [--format=<type>] [--temp_dir=<path>] [--compiler_config=<path>] [--report_filter=<filter>]
 
 Options:
   <files>                   Ecsact files used to build Ecsact Runtime
@@ -86,8 +86,57 @@ auto ecsact::cli::detail::build_command( //
 
 	auto output_path = fs::path{args.at("--output").asString()};
 
-	auto recipe_path = fs::path{args.at("--recipe").asString()};
-	auto recipe = build_recipe::from_yaml_file(recipe_path);
+	auto recipe_composite = std::optional<build_recipe>{};
+	auto recipe_paths = args.at("--recipe").asStringList();
+	for(auto recipe_path : args.at("--recipe").asStringList()) {
+		auto recipe_result = build_recipe::from_yaml_file(recipe_path);
+
+		if(std::holds_alternative<build_recipe_parse_error>(recipe_result)) {
+			auto recipe_error = std::get<build_recipe_parse_error>(recipe_result);
+			ecsact::cli::report_error(
+				"Recipe Error {}",
+				magic_enum::enum_name(recipe_error)
+			);
+			return 1;
+		}
+
+		auto recipe = std::move(std::get<build_recipe>(recipe_result));
+		if(!recipe_composite) {
+			recipe_composite.emplace(std::move(recipe));
+		} else {
+			auto merge_result = build_recipe::merge(*recipe_composite, recipe);
+			if(std::holds_alternative<build_recipe_merge_error>(merge_result)) {
+				auto merge_error = std::get<build_recipe_merge_error>(merge_result);
+				ecsact::cli::report_error(
+					"Recipe Merge Error {}",
+					magic_enum::enum_name(merge_error)
+				);
+				return 1;
+			}
+
+			recipe_composite.emplace(std::get<build_recipe>(std::move(merge_result)));
+		}
+	}
+
+	if(!recipe_composite) {
+		ecsact::cli::report_error("No recipe");
+		return 1;
+	}
+
+	if(!args["--allow-unresolved-imports"].asBool()) {
+		if(!recipe_composite->imports().empty()) {
+			for(auto imp : recipe_composite->imports()) {
+				ecsact::cli::report_error("Unresolved import {}", imp);
+			}
+			ecsact::cli::report_error(
+				"Build recipes do not resolve all imports. Make sure all imported "
+				"functions in provided recipes are also exported by another recipe. If "
+				"you would like to allow unresolved imports you may provide the "
+				"--allow-unresolved-imports flag to suppress this error."
+			);
+			return 1;
+		}
+	}
 
 	auto temp_dir = args["--temp_dir"].isString() //
 		? fs::path{args["--temp_dir"].asString()}
@@ -114,15 +163,6 @@ auto ecsact::cli::detail::build_command( //
 		file_paths.emplace_back(file);
 	}
 
-	if(std::holds_alternative<build_recipe_parse_error>(recipe)) {
-		auto recipe_error = std::get<build_recipe_parse_error>(recipe);
-		ecsact::cli::report_error(
-			"Recipe Error {}",
-			magic_enum::enum_name(recipe_error)
-		);
-		return 1;
-	}
-
 	auto eval_errors = ecsact::eval_files(file_paths);
 
 	if(!eval_errors.empty()) {
@@ -172,26 +212,29 @@ auto ecsact::cli::detail::build_command( //
 		compiler->compiler_version
 	);
 
+	auto additional_plugin_dirs = std::vector<fs::path>{};
+	for(fs::path recipe_path : recipe_paths) {
+		if(recipe_path.has_parent_path()) {
+			additional_plugin_dirs.emplace_back(recipe_path.parent_path());
+		}
+	}
+
 	auto cook_options = cook_recipe_options{
 		.files = file_paths,
 		.work_dir = work_dir,
 		.output_path = output_path,
-		.additional_plugin_dirs = {recipe_path.parent_path()},
+		.additional_plugin_dirs = additional_plugin_dirs,
 	};
-	auto runtime_output_path = cook_recipe(
-		argv[0],
-		std::get<build_recipe>(recipe),
-		*compiler,
-		cook_options
-	);
+	auto runtime_output_path =
+		cook_recipe(argv[0], *recipe_composite, *compiler, cook_options);
 
 	if(!runtime_output_path) {
 		ecsact::cli::report_error("Failed to cook recipe");
 		return 1;
 	}
 
 	auto exit_code = ecsact::cli::taste_recipe( //
-		std::get<build_recipe>(recipe),
+		*recipe_composite,
 		*runtime_output_path
 	);
 

ecsact/cli/commands/build/build_recipe.cc

@@ -3,6 +3,7 @@
 #include <fstream>
 #include <filesystem>
 #include <cassert>
+#include <ranges>
 #include <iostream>
 #include <algorithm>
 #include <ranges>
@@ -12,6 +13,15 @@
 
 namespace fs = std::filesystem;
 
+static auto range_contains(auto& r, const auto& v) -> bool {
+	for(auto& rv : r) {
+		if(rv == v) {
+			return true;
+		}
+	}
+	return false;
+}
+
 ecsact::build_recipe::build_recipe() = default;
 ecsact::build_recipe::build_recipe(build_recipe&&) = default;
 ecsact::build_recipe::~build_recipe() = default;
@@ -227,3 +237,89 @@ auto ecsact::build_recipe::from_yaml_file( //
 		return build_recipe_parse_error::bad_file;
 	}
 }
+
+auto ecsact::build_recipe::merge( //
+	const build_recipe& base,
+	const build_recipe& target
+) -> std::variant<build_recipe, build_recipe_merge_error> {
+	auto merged_build_recipe = build_recipe{};
+
+	for(auto base_export_name : base._exports) {
+		for(auto target_export_name : target._exports) {
+			if(target_export_name == base_export_name) {
+				ecsact::cli::report_error(
+					"Multiple recipes export {}",
+					target_export_name
+				);
+				return build_recipe_merge_error::conflicting_export;
+			}
+		}
+	}
+
+	merged_build_recipe._system_libs.reserve(
+		merged_build_recipe._system_libs.size() + target._system_libs.size()
+	);
+	merged_build_recipe._system_libs.insert(
+		merged_build_recipe._system_libs.end(),
+		base._system_libs.begin(),
+		base._system_libs.end()
+	);
+	merged_build_recipe._system_libs.insert(
+		merged_build_recipe._system_libs.end(),
+		target._system_libs.begin(),
+		target._system_libs.end()
+	);
+
+	merged_build_recipe._exports.reserve(
+		merged_build_recipe._exports.size() + target._exports.size()
+	);
+	merged_build_recipe._exports.insert(
+		merged_build_recipe._exports.end(),
+		base._exports.begin(),
+		base._exports.end()
+	);
+	merged_build_recipe._exports.insert(
+		merged_build_recipe._exports.end(),
+		target._exports.begin(),
+		target._exports.end()
+	);
+
+	merged_build_recipe._imports.reserve(
+		merged_build_recipe._imports.size() + target._imports.size()
+	);
+	merged_build_recipe._imports.insert(
+		merged_build_recipe._imports.end(),
+		base._imports.begin(),
+		base._imports.end()
+	);
+	merged_build_recipe._imports.insert(
+		merged_build_recipe._imports.end(),
+		target._imports.begin(),
+		target._imports.end()
+	);
+
+	for(auto itr = merged_build_recipe._imports.begin();
+			itr != merged_build_recipe._imports.end();) {
+		if(range_contains(merged_build_recipe._exports, *itr)) {
+			itr = merged_build_recipe._imports.erase(itr);
+			continue;
+		}
+		++itr;
+	}
+
+	merged_build_recipe._sources.reserve(
+		merged_build_recipe._sources.size() + target._sources.size()
+	);
+	merged_build_recipe._sources.insert(
+		merged_build_recipe._sources.end(),
+		base._sources.begin(),
+		base._sources.end()
+	);
+	merged_build_recipe._sources.insert(
+		merged_build_recipe._sources.end(),
+		target._sources.begin(),
+		target._sources.end()
+	);
+
+	return merged_build_recipe;
+}

ecsact/cli/commands/build/build_recipe.hh

@@ -19,12 +19,21 @@ enum class build_recipe_parse_error {
 	conflicting_import_export_method_modules,
 };
 
+enum class build_recipe_merge_error {
+	conflicting_export,
+};
+
 class build_recipe {
 public:
 	static auto from_yaml_file( //
 		std::filesystem::path p
 	) -> std::variant<build_recipe, build_recipe_parse_error>;
 
+	static auto merge( //
+		const build_recipe& a,
+		const build_recipe& b
+	) -> std::variant<build_recipe, build_recipe_merge_error>;
+
 	struct source_path {
 		std::filesystem::path      path;
 		std::optional<std::string> outdir;

test/build_recipe/BUILD.bazel

@@ -9,7 +9,9 @@ cc_test(
     copts = copts,
     data = [
         "ecsact_build_test.cc",
+        "ecsact_build_test_merge.cc",
         "test-recipe.yml",
+        "test-merge-recipe.yml",
         "//:test.ecsact",
         "//:test_codegen_plugin",
         "@ecsact_cli",
@@ -24,12 +26,14 @@ cc_test(
         "@platforms//os:windows": {
             "TEST_ECSACT_CLI": "$(rootpath @ecsact_cli)",
             "TEST_ECSACT_BUILD_RECIPE_PATH": "$(rootpath test-recipe.yml)",
+            "TEST_ECSACT_BUILD_MERGE_RECIPE_PATH": "$(rootpath test-merge-recipe.yml)",
             "TEST_ECSACT_FILE_PATH": "$(rootpath //:test.ecsact)",
             "TEST_CODEGEN_PLUGIN_PATH": "$(rootpath //:test_codegen_plugin)",
         },
         "//conditions:default": {
             "TEST_ECSACT_CLI": "$(rootpath @ecsact_cli)",
             "TEST_ECSACT_BUILD_RECIPE_PATH": "$(rootpath test-recipe.yml)",
+            "TEST_ECSACT_BUILD_MERGE_RECIPE_PATH": "$(rootpath test-merge-recipe.yml)",
             "TEST_ECSACT_FILE_PATH": "$(rootpath //:test.ecsact)",
             "TEST_CODEGEN_PLUGIN_PATH": "$(rootpath //:test_codegen_plugin)",
             "CC": "$(rootpath @llvm_toolchain_llvm//:bin/clang)",

test/build_recipe/ecsact_build_test_merge.cc

@@ -0,0 +1,7 @@
+#include "ecsact/runtime/dynamic.h"
+
+void ecsact_system_execution_context_get(struct ecsact_system_execution_context*, ecsact_component_like_id, void*) {
+}
+
+void ecsact_system_execution_context_action(struct ecsact_system_execution_context*, void*) {
+}

test/build_recipe/test-merge-recipe.yml

@@ -0,0 +1,11 @@
+$schema: ../../schema/ecsact-build-recipe.schema.json
+
+name: Example Recipe 2
+
+sources:
+  - ecsact_build_test_merge.cc
+
+exports:
+  - ecsact_system_execution_context_get
+  - ecsact_system_execution_context_action
+

test/build_recipe/test_build_recipe.cc

@@ -17,11 +17,14 @@ TEST(Build, Success) {
 	auto test_codegen_plugin_path = std::getenv("TEST_CODEGEN_PLUGIN_PATH");
 	auto test_ecsact_file_path = std::getenv("TEST_ECSACT_FILE_PATH");
 	auto test_build_recipe_path = std::getenv("TEST_ECSACT_BUILD_RECIPE_PATH");
+	auto test_build_merge_recipe_path =
+		std::getenv("TEST_ECSACT_BUILD_MERGE_RECIPE_PATH");
 
 	ASSERT_NE(test_ecsact_cli, nullptr);
 	ASSERT_NE(test_codegen_plugin_path, nullptr);
 	ASSERT_NE(test_ecsact_file_path, nullptr);
 	ASSERT_NE(test_build_recipe_path, nullptr);
+	ASSERT_NE(test_build_merge_recipe_path, nullptr);
 
 	ASSERT_TRUE(fs::exists(test_codegen_plugin_path));
 	ASSERT_TRUE(fs::exists(test_ecsact_file_path));
@@ -30,10 +33,22 @@ TEST(Build, Success) {
 	auto exit_code = build_command(std::vector{
 		"ecsact"s,
 		"build"s,
+		"--allow-unresolved-imports"s,
 		std::string{test_ecsact_file_path},
 		std::format("--recipe={}", test_build_recipe_path),
 		std::format("--output=test_ecsact_runtime"),
 	});
 
 	ASSERT_EQ(exit_code, 0);
+
+	exit_code = build_command(std::vector{
+		"ecsact"s,
+		"build"s,
+		std::string{test_ecsact_file_path},
+		std::format("--recipe={}", test_build_recipe_path),
+		std::format("--recipe={}", test_build_merge_recipe_path),
+		std::format("--output=test_ecsact_runtime_merged"),
+	});
+
+	ASSERT_EQ(exit_code, 0);
 }