added package.cmake for creating .deb file

CMakeLists.txt

@@ -31,7 +31,7 @@ endfunction()
 
 if(${ADD_DEMO})
   find_package(Python3 COMPONENTS NumPy REQUIRED)
-  find_package(xtensor REQUIRED)
+  find_package(xtensor 0.24.0 REQUIRED)
   set(CMAKE_CXX_STANDARD 17)
   set(CMAKE_CXX_FLAGS "-Wall -g -DUSE_GUI=${USE_GUI}")
   add_subdirectory(gallery/lines_bars_and_markers)
@@ -97,6 +97,8 @@ install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/${PROJECT_NAME}
   DESTINATION include
   )
 set(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/LICENSE")
+# create .deb
+include("${PROJECT_SOURCE_DIR}/cmake/package.cmake")
 
 # uninstall target
 ## actually it's just `xargs rm < install_manifest.txt`

cmake/package.cmake

+# https://decovar.dev/blog/2021/09/23/cmake-cpack-package-deb-apt/
+set(CPACK_PACKAGE_NAME ${PROJECT_NAME})
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY ${CMAKE_PROJECT_DESCRIPTION})
+set(CPACK_VERBATIM_VARIABLES YES)
+set(CPACK_PACKAGE_INSTALL_DIRECTORY ${CPACK_PACKAGE_NAME})
+SET(CPACK_OUTPUT_FILE_PREFIX "${PROJECT_BINARY_DIR}/")
+set(CPACK_PACKAGING_INSTALL_PREFIX ${CMAKE_INSTALL_PREFIX})
+set(CPACK_PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
+set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
+set(CPACK_PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
+set(CPACK_PACKAGE_CONTACT "example@example.com")
+set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Deb Example")
+set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE")
+set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/README.md")
+# package name for deb
+set(CPACK_DEBIAN_FILE_NAME DEB-DEFAULT)
+set(CPACK_COMPONENTS_GROUPING ALL_COMPONENTS_IN_ONE)
+# without this you won't be able to pack only specified component
+set(CPACK_DEB_COMPONENT_INSTALL YES)
+
+include(CPack)
+
+# run cpack -G DEB to create .deb