Tests/CXXModules: test transitive modules usage

Tests/RunCMake/CXXModules/RunCMakeTest.cmake

@@ -263,6 +263,8 @@ if ("export_bmi" IN_LIST CMake_TEST_MODULE_COMPILATION)
   run_cxx_module_test(export-usage-build)
   run_cxx_module_test(export-bmi-and-interface-build)
   run_cxx_module_test(export-transitive-targets-build)
+  run_cxx_module_test(export-transitive-modules1-build)
+  run_cxx_module_test(export-transitive-modules-build export-transitive-modules-build "-DCMAKE_PREFIX_PATH=${RunCMake_BINARY_DIR}/examples/export-transitive-modules1-build-build" )
 
   if ("collation" IN_LIST CMake_TEST_MODULE_COMPILATION AND
       "bmionly" IN_LIST CMake_TEST_MODULE_COMPILATION)
@@ -280,6 +282,9 @@ if ("export_bmi" IN_LIST CMake_TEST_MODULE_COMPILATION)
 
     set(test_suffix export-transitive-targets-build)
     run_cxx_module_test(import-modules "import-modules-${test_suffix}" "-DCMAKE_PREFIX_PATH=${RunCMake_BINARY_DIR}/examples/${test_suffix}-build" -DTRANSITIVE_TARGETS=1)
+
+    set(test_suffix export-transitive-modules-build)
+    run_cxx_module_test(import-modules "import-modules-${test_suffix}" "-DCMAKE_PREFIX_PATH=${RunCMake_BINARY_DIR}/examples/${test_suffix}-build" -DTRANSITIVE_MODULES=1)
   endif ()
 endif ()
 
@@ -298,6 +303,8 @@ if ("install_bmi" IN_LIST CMake_TEST_MODULE_COMPILATION)
     run_cxx_module_test(export-usage-install)
     run_cxx_module_test(export-bmi-and-interface-install)
     run_cxx_module_test(export-transitive-targets-install)
+    run_cxx_module_test(export-transitive-modules1-install)
+    run_cxx_module_test(export-transitive-modules-install export-transitive-modules-install "-DCMAKE_PREFIX_PATH=${RunCMake_BINARY_DIR}/examples/export-transitive-modules1-install-install" )
 
     if ("collation" IN_LIST CMake_TEST_MODULE_COMPILATION AND
         "bmionly" IN_LIST CMake_TEST_MODULE_COMPILATION)
@@ -316,6 +323,9 @@ if ("install_bmi" IN_LIST CMake_TEST_MODULE_COMPILATION)
 
       set(test_suffix export-transitive-targets-install)
       run_cxx_module_test(import-modules "import-modules-${test_suffix}" "-DCMAKE_PREFIX_PATH=${RunCMake_BINARY_DIR}/examples/${test_suffix}-install" -DTRANSITIVE_TARGETS=1)
+
+      set(test_suffix export-transitive-modules-install)
+      run_cxx_module_test(import-modules "import-modules-${test_suffix}" "-DCMAKE_PREFIX_PATH=${RunCMake_BINARY_DIR}/examples/${test_suffix}-install" -DTRANSITIVE_MODULES=1)
       set(RunCMake_CXXModules_INSTALL 1)
     endif ()
   endif ()

Tests/RunCMake/CXXModules/examples/export-transitive-modules-build/CMakeLists.txt

@@ -0,0 +1,54 @@
+cmake_minimum_required(VERSION 3.24...3.28)
+project(cxx_modules_export_transitive_modules CXX)
+
+include("${CMAKE_SOURCE_DIR}/../cxx-modules-rules.cmake")
+
+find_package(export_transitive_modules1 REQUIRED)
+
+add_library(export_transitive_modules STATIC)
+target_sources(export_transitive_modules
+  PUBLIC
+    FILE_SET modules TYPE CXX_MODULES
+      BASE_DIRS
+        "${CMAKE_CURRENT_SOURCE_DIR}"
+      FILES
+        importable.cxx
+  )
+target_compile_features(export_transitive_modules PUBLIC cxx_std_20)
+target_link_libraries(export_transitive_modules PRIVATE CXXModules::export_transitive_modules1)
+
+install(TARGETS export_transitive_modules
+  EXPORT CXXModules
+  FILE_SET modules DESTINATION "lib/cxx/miu")
+export(EXPORT CXXModules
+  NAMESPACE CXXModules::
+  FILE "${CMAKE_CURRENT_BINARY_DIR}/export_transitive_modules-targets.cmake"
+  CXX_MODULES_DIRECTORY "export_transitive_modules-cxx-modules")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/export_transitive_modules-config.cmake"
+  "include(CMakeFindDependencyMacro)
+set(export_transitive_modules1_DIR \"${export_transitive_modules1_DIR}\")
+find_dependency(export_transitive_modules1)
+include(\"\${CMAKE_CURRENT_LIST_DIR}/export_transitive_modules-targets.cmake\")
+set(\${CMAKE_FIND_PACKAGE_NAME}_FOUND 1)
+")
+
+set(generator
+  -G "${CMAKE_GENERATOR}")
+if (CMAKE_GENERATOR_TOOLSET)
+  list(APPEND generator
+    -T "${CMAKE_GENERATOR_TOOLSET}")
+endif ()
+if (CMAKE_GENERATOR_PLATFORM)
+  list(APPEND generator
+    -A "${CMAKE_GENERATOR_PLATFORM}")
+endif ()
+
+add_test(NAME export_transitive_modules_build
+  COMMAND
+    "${CMAKE_COMMAND}"
+    "-Dexpected_source_dir=${CMAKE_CURRENT_SOURCE_DIR}"
+    "-Dexpected_binary_dir=${CMAKE_CURRENT_BINARY_DIR}"
+    "-Dexport_transitive_modules_DIR=${CMAKE_CURRENT_BINARY_DIR}"
+    ${generator}
+    -S "${CMAKE_CURRENT_SOURCE_DIR}/test"
+    -B "${CMAKE_CURRENT_BINARY_DIR}/test")

Tests/RunCMake/CXXModules/examples/export-transitive-modules-build/importable.cxx

@@ -0,0 +1,7 @@
+export module importable;
+import module1;
+
+export int from_import()
+{
+  return from_inner_import();
+}

Tests/RunCMake/CXXModules/examples/export-transitive-modules-build/test/CMakeLists.txt

@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.28)
+project(cxx_modules_library NONE)
+
+find_package(export_transitive_modules REQUIRED)
+
+if (NOT TARGET CXXModules::export_transitive_modules1)
+  message(FATAL_ERROR
+    "Missing transitive imported target")
+endif ()
+
+if (NOT TARGET CXXModules::export_transitive_modules)
+  message(FATAL_ERROR
+    "Missing imported target")
+endif ()

Tests/RunCMake/CXXModules/examples/export-transitive-modules-install/CMakeLists.txt

@@ -0,0 +1,57 @@
+cmake_minimum_required(VERSION 3.24...3.28)
+project(cxx_modules_export_transitive_modules CXX)
+
+include("${CMAKE_SOURCE_DIR}/../cxx-modules-rules.cmake")
+
+find_package(export_transitive_modules1 REQUIRED)
+
+add_library(export_transitive_modules STATIC)
+target_sources(export_transitive_modules
+  PUBLIC
+    FILE_SET modules TYPE CXX_MODULES
+      BASE_DIRS
+        "${CMAKE_CURRENT_SOURCE_DIR}"
+      FILES
+        importable.cxx
+  )
+target_compile_features(export_transitive_modules PUBLIC cxx_std_20)
+target_link_libraries(export_transitive_modules PRIVATE CXXModules::export_transitive_modules1)
+
+install(TARGETS export_transitive_modules
+  EXPORT CXXModules
+  FILE_SET modules DESTINATION "lib/cxx/miu")
+install(EXPORT CXXModules
+  NAMESPACE CXXModules::
+  DESTINATION "lib/cmake/export_transitive_modules"
+  FILE "export_transitive_modules-targets.cmake"
+  CXX_MODULES_DIRECTORY "export_transitive_modules-cxx-modules")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/export_transitive_modules-config.cmake"
+  "include(CMakeFindDependencyMacro)
+set(export_transitive_modules1_DIR \"${export_transitive_modules1_DIR}\")
+find_dependency(export_transitive_modules1)
+include(\"\${CMAKE_CURRENT_LIST_DIR}/export_transitive_modules-targets.cmake\")
+set(\${CMAKE_FIND_PACKAGE_NAME}_FOUND 1)
+")
+install(FILES "${CMAKE_CURRENT_BINARY_DIR}/export_transitive_modules-config.cmake"
+  DESTINATION "lib/cmake/export_transitive_modules")
+
+set(generator
+  -G "${CMAKE_GENERATOR}")
+if (CMAKE_GENERATOR_TOOLSET)
+  list(APPEND generator
+    -T "${CMAKE_GENERATOR_TOOLSET}")
+endif ()
+if (CMAKE_GENERATOR_PLATFORM)
+  list(APPEND generator
+    -A "${CMAKE_GENERATOR_PLATFORM}")
+endif ()
+
+add_test(NAME export_transitive_modules_build
+  COMMAND
+    "${CMAKE_COMMAND}"
+    "-Dexpected_source_dir=${CMAKE_INSTALL_PREFIX}/lib/cxx/miu"
+    "-Dexpected_binary_dir=${CMAKE_INSTALL_PREFIX}/lib/cxx/bmi"
+    "-Dexport_transitive_modules_DIR=${CMAKE_INSTALL_PREFIX}/lib/cmake/export_transitive_modules"
+    ${generator}
+    -S "${CMAKE_CURRENT_SOURCE_DIR}/test"
+    -B "${CMAKE_CURRENT_BINARY_DIR}/test")

Tests/RunCMake/CXXModules/examples/export-transitive-modules-install/importable.cxx

@@ -0,0 +1,7 @@
+export module importable;
+import module1;
+
+export int from_import()
+{
+  return from_inner_import();
+}

Tests/RunCMake/CXXModules/examples/export-transitive-modules-install/test/CMakeLists.txt

@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.28)
+project(cxx_modules_library NONE)
+
+find_package(export_transitive_modules REQUIRED)
+
+if (NOT TARGET CXXModules::export_transitive_modules1)
+  message(FATAL_ERROR
+    "Missing transitive imported target")
+endif ()
+
+if (NOT TARGET CXXModules::export_transitive_modules)
+  message(FATAL_ERROR
+    "Missing imported target")
+endif ()

Tests/RunCMake/CXXModules/examples/export-transitive-modules1-build/CMakeLists.txt

@@ -0,0 +1,48 @@
+cmake_minimum_required(VERSION 3.24...3.28)
+project(cxx_modules_export_transitive_modules1 CXX)
+
+include("${CMAKE_SOURCE_DIR}/../cxx-modules-rules.cmake")
+
+add_library(export_transitive_modules1 STATIC)
+target_sources(export_transitive_modules1
+  PUBLIC
+    FILE_SET modules TYPE CXX_MODULES
+      BASE_DIRS
+        "${CMAKE_CURRENT_SOURCE_DIR}"
+      FILES
+        importable.cxx
+  )
+target_compile_features(export_transitive_modules1 PUBLIC cxx_std_20)
+
+install(TARGETS export_transitive_modules1
+  EXPORT CXXModules
+  FILE_SET modules DESTINATION "lib/cxx/miu")
+export(EXPORT CXXModules
+  NAMESPACE CXXModules::
+  FILE "${CMAKE_CURRENT_BINARY_DIR}/export_transitive_modules1-targets.cmake"
+  CXX_MODULES_DIRECTORY "export_transitive_modules1-cxx-modules")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/export_transitive_modules1-config.cmake"
+  "include(\"\${CMAKE_CURRENT_LIST_DIR}/export_transitive_modules1-targets.cmake\")
+set(\${CMAKE_FIND_PACKAGE_NAME}_FOUND 1)
+")
+
+set(generator
+  -G "${CMAKE_GENERATOR}")
+if (CMAKE_GENERATOR_TOOLSET)
+  list(APPEND generator
+    -T "${CMAKE_GENERATOR_TOOLSET}")
+endif ()
+if (CMAKE_GENERATOR_PLATFORM)
+  list(APPEND generator
+    -A "${CMAKE_GENERATOR_PLATFORM}")
+endif ()
+
+add_test(NAME export_transitive_modules1_build
+  COMMAND
+    "${CMAKE_COMMAND}"
+    "-Dexpected_source_dir=${CMAKE_CURRENT_SOURCE_DIR}"
+    "-Dexpected_binary_dir=${CMAKE_CURRENT_BINARY_DIR}"
+    "-Dexport_transitive_modules1_DIR=${CMAKE_CURRENT_BINARY_DIR}"
+    ${generator}
+    -S "${CMAKE_CURRENT_SOURCE_DIR}/test"
+    -B "${CMAKE_CURRENT_BINARY_DIR}/test")

Tests/RunCMake/CXXModules/examples/export-transitive-modules1-build/importable.cxx

@@ -0,0 +1,6 @@
+export module module1;
+
+export int from_inner_import()
+{
+  return 0;
+}

Tests/RunCMake/CXXModules/examples/export-transitive-modules1-build/test/CMakeLists.txt

@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.28)
+project(cxx_modules_library NONE)
+
+find_package(export_transitive_modules1 REQUIRED)
+
+if (NOT TARGET CXXModules::export_transitive_modules1)
+  message(FATAL_ERROR
+    "Missing imported target")
+endif ()

Tests/RunCMake/CXXModules/examples/export-transitive-modules1-install/CMakeLists.txt

@@ -0,0 +1,51 @@
+cmake_minimum_required(VERSION 3.24...3.28)
+project(cxx_modules_export_transitive_modules1 CXX)
+
+include("${CMAKE_SOURCE_DIR}/../cxx-modules-rules.cmake")
+
+add_library(export_transitive_modules1 STATIC)
+target_sources(export_transitive_modules1
+  PUBLIC
+    FILE_SET modules TYPE CXX_MODULES
+      BASE_DIRS
+        "${CMAKE_CURRENT_SOURCE_DIR}"
+      FILES
+        importable.cxx
+  )
+target_compile_features(export_transitive_modules1 PUBLIC cxx_std_20)
+
+install(TARGETS export_transitive_modules1
+  EXPORT CXXModules
+  FILE_SET modules DESTINATION "lib/cxx/miu")
+install(EXPORT CXXModules
+  NAMESPACE CXXModules::
+  DESTINATION "lib/cmake/export_transitive_modules1"
+  FILE "export_transitive_modules1-targets.cmake"
+  CXX_MODULES_DIRECTORY "export_transitive_modules1-cxx-modules")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/export_transitive_modules1-config.cmake"
+  "include(\"\${CMAKE_CURRENT_LIST_DIR}/export_transitive_modules1-targets.cmake\")
+set(\${CMAKE_FIND_PACKAGE_NAME}_FOUND 1)
+")
+install(FILES "${CMAKE_CURRENT_BINARY_DIR}/export_transitive_modules1-config.cmake"
+  DESTINATION "lib/cmake/export_transitive_modules1")
+
+set(generator
+  -G "${CMAKE_GENERATOR}")
+if (CMAKE_GENERATOR_TOOLSET)
+  list(APPEND generator
+    -T "${CMAKE_GENERATOR_TOOLSET}")
+endif ()
+if (CMAKE_GENERATOR_PLATFORM)
+  list(APPEND generator
+    -A "${CMAKE_GENERATOR_PLATFORM}")
+endif ()
+
+add_test(NAME export_transitive_modules1_build
+  COMMAND
+    "${CMAKE_COMMAND}"
+    "-Dexpected_source_dir=${CMAKE_INSTALL_PREFIX}/lib/cxx/miu"
+    "-Dexpected_binary_dir=${CMAKE_INSTALL_PREFIX}/lib/cxx/bmi"
+    "-Dexport_transitive_modules1_DIR=${CMAKE_INSTALL_PREFIX}/lib/cmake/export_transitive_modules1"
+    ${generator}
+    -S "${CMAKE_CURRENT_SOURCE_DIR}/test"
+    -B "${CMAKE_CURRENT_BINARY_DIR}/test")

Tests/RunCMake/CXXModules/examples/export-transitive-modules1-install/importable.cxx

@@ -0,0 +1,6 @@
+export module module1;
+
+export int from_inner_import()
+{
+  return 0;
+}

Tests/RunCMake/CXXModules/examples/export-transitive-modules1-install/test/CMakeLists.txt

@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.28)
+project(cxx_modules_library NONE)
+
+find_package(export_transitive_modules1 REQUIRED)
+
+if (NOT TARGET CXXModules::export_transitive_modules1)
+  message(FATAL_ERROR
+    "Missing imported target")
+endif ()

Tests/RunCMake/CXXModules/examples/import-modules/CMakeLists.txt

@@ -13,6 +13,8 @@ elseif (FROM_NINJA)
   set(package_name "export_from_ninja")
 elseif (TRANSITIVE_TARGETS)
   set(package_name "export_transitive_targets")
+elseif (TRANSITIVE_MODULES)
+  set(package_name "export_transitive_modules")
 else ()
   set(package_name "export_interfaces")
 endif ()