Add CMake package config

CMakeLists.txt

@@ -1,15 +1,51 @@
 cmake_minimum_required(VERSION 3.10)
-project(recycle)
+
+project(recycle
+  VERSION 6.0.0
+  DESCRIPTION "Simple resource pool for recycling resources in C++"
+  LANGUAGES CXX)
 
 # Define library
 add_library(recycle INTERFACE)
 target_compile_features(recycle INTERFACE cxx_std_14)
-target_include_directories(recycle INTERFACE src/)
+target_include_directories(recycle INTERFACE $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/src> $<INSTALL_INTERFACE:include>)
 add_library(steinwurf::recycle ALIAS recycle)
 
+include(GNUInstallDirs)
+set(RECYCLE_CONFIG_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/recycle" CACHE PATH "recycle config directory")
+
 # Install headers
 install(
   DIRECTORY ./src/recycle
-  DESTINATION ${CMAKE_INSTALL_PREFIX}/include
+  DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
   FILES_MATCHING
   PATTERN *.hpp)
+
+# Install targets
+install(TARGETS recycle EXPORT recycle-targets)
+install(
+  EXPORT recycle-targets
+  DESTINATION ${RECYCLE_CONFIG_DIR}
+  NAMESPACE steinwurf::)
+
+# Install package config
+include(CMakePackageConfigHelpers)
+
+configure_package_config_file(
+  cmake/recycle-config.cmake.in
+  "${CMAKE_CURRENT_BINARY_DIR}/recycle-config.cmake"
+  INSTALL_DESTINATION ${RECYCLE_CONFIG_DIR}
+  NO_CHECK_REQUIRED_COMPONENTS_MACRO)
+
+write_basic_package_version_file(
+  "${CMAKE_CURRENT_BINARY_DIR}/recycle-config-version.cmake"
+  VERSION ${PROJECT_VERSION}
+  COMPATIBILITY SameMajorVersion
+)
+
+install(
+  FILES
+    "${CMAKE_CURRENT_BINARY_DIR}/recycle-config.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/recycle-config-version.cmake"
+  DESTINATION
+    ${RECYCLE_CONFIG_DIR})

cmake/recycle-config.cmake.in

@@ -0,0 +1,6 @@
+@PACKAGE_INIT@
+
+if(NOT TARGET steinwurf::recycle)
+  set_and_check(RECYCLE_INCLUDE_DIR "${PACKAGE_PREFIX_DIR}/@CMAKE_INSTALL_INCLUDEDIR@")
+  include("${CMAKE_CURRENT_LIST_DIR}/recycle-targets.cmake")
+endif()