Only expose headers if used as subproject

jasujm · Dec 9, 2019 · 8b93906 · 8b93906
1 parent f4b1fc6
commit 8b93906
Showing 1 changed file with 64 additions and 57 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -4,72 +4,79 @@ project("Enhanced Enum"
   VERSION "0.1")
 
 set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake" ${CMAKE_MODULE_PATH})
-include(GNUInstallDirs)
-include(CMakePackageConfigHelpers)
 
 set(ENHANCEDENUM_LIB "EnhancedEnum")
 set(ENHANCEDENUM_INCLUDE_DIR "${PROJECT_SOURCE_DIR}/cxx/include")
 
-set(PYTHON_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/python")
-file(GLOB_RECURSE ENUMECG_SOURCE_PYS "${PYTHON_SOURCE_DIR}/enumecg/**.py")
-file(GLOB ENUMECG_SOURCE_TEMPLATES "${PYTHON_SOURCE_DIR}/enumecg/templates/*.in")
-set(ENUMECG_SOURCE_FILES ${ENUMECG_SOURCE_PYS} ${ENUMECG_SOURCE_TEMPLATES})
-
-# Building exportable C++ lib adapted from blog post:
-# http://dominikberner.ch/cmake-interface-lib/
-
 add_library(${ENHANCEDENUM_LIB} INTERFACE)
 target_include_directories(${ENHANCEDENUM_LIB} INTERFACE
   $<BUILD_INTERFACE:${ENHANCEDENUM_INCLUDE_DIR}>
   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
 )
 target_compile_features(${ENHANCEDENUM_LIB} INTERFACE cxx_std_17)
 
-set(ENHANCEDENUM_TARGETS "${ENHANCEDENUM_LIB}_Targets")
-set(ENHANCEDENUM_CONFIGVERSION "${ENHANCEDENUM_LIB}ConfigVersion.cmake")
-set(ENHANCEDENUM_CONFIG "${PROJECT_BINARY_DIR}/${ENHANCEDENUM_LIB}Config.cmake")
-
-install(TARGETS ${ENHANCEDENUM_LIB}
-  EXPORT ${ENHANCEDENUM_TARGETS}
-  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-
-write_basic_package_version_file(${ENHANCEDENUM_CONFIGVERSION}
-  VERSION ${PROJECT_VERSION}
-  COMPATIBILITY SameMajorVersion)
-
-configure_package_config_file(
-  "${PROJECT_SOURCE_DIR}/cmake/${ENHANCEDENUM_LIB}Config.cmake.in"
-  ${ENHANCEDENUM_CONFIG}
-  INSTALL_DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${ENHANCEDENUM_LIB}/cmake)
-
-install(EXPORT ${ENHANCEDENUM_TARGETS}
-  FILE ${ENHANCEDENUM_LIB}Targets.cmake
-  NAMESPACE ${ENHANCEDENUM_LIB}::
-  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${ENHANCEDENUM_LIB}/cmake)
-
-install(FILES ${ENHANCEDENUM_CONFIG}
-  "${PROJECT_BINARY_DIR}/${ENHANCEDENUM_CONFIGVERSION}"
-  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${ENHANCEDENUM_LIB}/cmake)
-
-install(DIRECTORY ${ENHANCEDENUM_INCLUDE_DIR}/ DESTINATION include)
-
-set(ENHANCEDENUM_BUILD_TESTS OFF CACHE BOOL "Build tests")
-if(ENHANCEDENUM_BUILD_TESTS)
-  enable_testing()
-endif()
-
-set(ENHANCEDENUM_BUILD_DOCS OFF CACHE BOOL "Build documentation")
-if(ENHANCEDENUM_BUILD_DOCS)
-  add_subdirectory(docs)
-endif()
-
-if(ENHANCEDENUM_BUILD_TESTS)
-  add_subdirectory(cxx/tests)
-endif()
-
-set(ENHANCEDENUM_BUILD_PYTHON OFF CACHE BOOL "Build python modules")
-if(ENHANCEDENUM_BUILD_PYTHON)
-  add_subdirectory(python)
+# Only expose headers if this is a subproject of another project
+# Otherwise proceed with install targets, tests etc.
+
+get_directory_property(IS_SUBPROJECT PARENT_DIRECTORY)
+if(NOT IS_SUBPROJECT)
+  include(GNUInstallDirs)
+  include(CMakePackageConfigHelpers)
+
+  set(PYTHON_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/python")
+  file(GLOB_RECURSE ENUMECG_SOURCE_PYS "${PYTHON_SOURCE_DIR}/enumecg/**.py")
+  file(GLOB ENUMECG_SOURCE_TEMPLATES "${PYTHON_SOURCE_DIR}/enumecg/templates/*.in")
+  set(ENUMECG_SOURCE_FILES ${ENUMECG_SOURCE_PYS} ${ENUMECG_SOURCE_TEMPLATES})
+
+  # Building exportable C++ lib adapted from blog post:
+  # http://dominikberner.ch/cmake-interface-lib/
+
+  set(ENHANCEDENUM_TARGETS "${ENHANCEDENUM_LIB}_Targets")
+  set(ENHANCEDENUM_CONFIGVERSION "${ENHANCEDENUM_LIB}ConfigVersion.cmake")
+  set(ENHANCEDENUM_CONFIG "${PROJECT_BINARY_DIR}/${ENHANCEDENUM_LIB}Config.cmake")
+
+  install(TARGETS ${ENHANCEDENUM_LIB}
+    EXPORT ${ENHANCEDENUM_TARGETS}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+
+  write_basic_package_version_file(${ENHANCEDENUM_CONFIGVERSION}
+    VERSION ${PROJECT_VERSION}
+    COMPATIBILITY SameMajorVersion)
+
+  configure_package_config_file(
+    "${PROJECT_SOURCE_DIR}/cmake/${ENHANCEDENUM_LIB}Config.cmake.in"
+    ${ENHANCEDENUM_CONFIG}
+    INSTALL_DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${ENHANCEDENUM_LIB}/cmake)
+
+  install(EXPORT ${ENHANCEDENUM_TARGETS}
+    FILE ${ENHANCEDENUM_LIB}Targets.cmake
+    NAMESPACE ${ENHANCEDENUM_LIB}::
+    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${ENHANCEDENUM_LIB}/cmake)
+
+  install(FILES ${ENHANCEDENUM_CONFIG}
+    "${PROJECT_BINARY_DIR}/${ENHANCEDENUM_CONFIGVERSION}"
+    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/${ENHANCEDENUM_LIB}/cmake)
+
+  install(DIRECTORY ${ENHANCEDENUM_INCLUDE_DIR}/ DESTINATION include)
+
+  set(ENHANCEDENUM_BUILD_TESTS OFF CACHE BOOL "Build tests")
+  if(ENHANCEDENUM_BUILD_TESTS)
+    enable_testing()
+  endif()
+
+  set(ENHANCEDENUM_BUILD_DOCS OFF CACHE BOOL "Build documentation")
+  if(ENHANCEDENUM_BUILD_DOCS)
+    add_subdirectory(docs)
+  endif()
+
+  if(ENHANCEDENUM_BUILD_TESTS)
+    add_subdirectory(cxx/tests)
+  endif()
+
+  set(ENHANCEDENUM_BUILD_PYTHON OFF CACHE BOOL "Build python modules")
+  if(ENHANCEDENUM_BUILD_PYTHON)
+    add_subdirectory(python)
+  endif()
 endif()