cmake_minimum_required(VERSION 3.5)
project(
  SimpleLibrary
  VERSION 1.0.0
  LANGUAGES CXX)

set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

#
# auto genrate a stamp header
#
execute_process(
  COMMAND git rev-parse --short HEAD
  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  OUTPUT_VARIABLE GIT_HASH
  OUTPUT_STRIP_TRAILING_WHITESPACE)

execute_process(
  COMMAND git rev-parse --abbrev-ref HEAD
  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  OUTPUT_VARIABLE GIT_BRANCH
  OUTPUT_STRIP_TRAILING_WHITESPACE)

set(CUSTOM_VALUE "Blah blah custom value.")

configure_file("${CMAKE_CURRENT_SOURCE_DIR}/include/version.h.in"
               "${CMAKE_CURRENT_BINARY_DIR}/include/simple/version.h")

add_custom_target(
  generate_version_h ALL
  DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/include/simple/version.h")

#
# Build
#
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wpedantic")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3 -DNDEBUG")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO
    "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -O2 -g -DNDEBUG")
set(CMAKE_BUILD_TYPE
    "Release"
    CACHE STRING "Choose the type of build." FORCE)
set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release"
                                             "RelWithDebInfo")

file(GLOB_RECURSE SOURCES "src/*.cpp")
# file(GLOB_RECURSE HEADERS "include/*.h")

# shared - set_target_properties is so that the binary is libSimpleLibrary.so
# add_depdencies so the config.h file is auto generated
add_library(SimpleLibraryShared SHARED ${SOURCES})
target_include_directories(
  SimpleLibraryShared
  PRIVATE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
  PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include/simple>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>
         $<INSTALL_INTERFACE:include/simple>)
set_target_properties(SimpleLibraryShared PROPERTIES OUTPUT_NAME
                                                     "SimpleLibrary")
add_dependencies(SimpleLibraryShared generate_version_h doc_doxygen)

# static - set_target_properties is so that the binary is libSimpleLibrary.a
# add_depdencies so the config.h file is auto generated
add_library(SimpleLibraryStatic STATIC ${SOURCES})
set_target_properties(SimpleLibraryStatic PROPERTIES OUTPUT_NAME
                                                     "SimpleLibrary")
target_include_directories(
  SimpleLibraryStatic
  PRIVATE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
  PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include/simple>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>
         $<INSTALL_INTERFACE:include/simple>)
add_dependencies(SimpleLibraryStatic generate_version_h doc_doxygen)

#
# Test
#
enable_testing()
add_subdirectory(test)

#
# doxygen
#
find_package(Doxygen REQUIRED)
set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in)
set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)

configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
add_custom_target(
  doc_doxygen # ALL otherwise it's constantly being rebuilt
  COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
  COMMENT "Generating API documentation with Doxygen"
  VERBATIM)

#
# man page
#
# look into pandoc that'll turn markdown into man pages.
add_custom_target(
  man ALL
  COMMAND ${CMAKE_COMMAND} -E copy_directory ${CMAKE_CURRENT_SOURCE_DIR}/man
          ${CMAKE_CURRENT_BINARY_DIR}/man
  COMMENT "Copying man pages")

#
# CMake find support
#
include(CMakePackageConfigHelpers)
write_basic_package_version_file(
  "${CMAKE_CURRENT_BINARY_DIR}/SimpleLibraryConfigVersion.cmake"
  VERSION ${PROJECT_VERSION}
  COMPATIBILITY AnyNewerVersion)

configure_package_config_file(
  "${CMAKE_CURRENT_SOURCE_DIR}/SimpleLibraryConfig.cmake.in"
  "${CMAKE_CURRENT_BINARY_DIR}/SimpleLibraryConfig.cmake"
  INSTALL_DESTINATION lib/cmake/SimpleLibrary)

#
# Install
#
install(
  TARGETS SimpleLibraryShared SimpleLibraryStatic
  ARCHIVE DESTINATION lib
  LIBRARY DESTINATION lib
  RUNTIME DESTINATION bin
  PUBLIC_HEADER DESTINATION include/simple)

install(DIRECTORY include/simple/ DESTINATION include/simple)

install(FILES "${CMAKE_CURRENT_BINARY_DIR}/include/simple/version.h"
        DESTINATION include/simple)

install(FILES "${CMAKE_CURRENT_BINARY_DIR}/SimpleLibraryConfig.cmake"
              "${CMAKE_CURRENT_BINARY_DIR}/SimpleLibraryConfigVersion.cmake"
        DESTINATION lib/cmake/SimpleLibrary)

install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/doc/html
        DESTINATION share/doc/SimpleLibrary)

install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/man/ DESTINATION share/man)

#
# CPack
#
set(CPACK_PACKAGE_NAME "SimpleLibrary")
set(CPACK_PACKAGE_VERSION ${PROJECT_VERSION})
set(CPACK_PACKAGE_CONTACT "RAS <sprague.a.rick@gmail.com>")
set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "A simple library example")
set(CPACK_PACKAGE_VENDOR "Your Organization")
set(CPACK_PACKAGE_LICENSE "MIT")
set(CPACK_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}")
set(CPACK_SOURCE_PACKAGE_FILE_NAME
    "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}-Source")

# Debian specific settings
set(CPACK_DEBIAN_PACKAGE_MAINTAINER "RAS <sprague.a.rick@gmail.com>")
set(CPACK_DEBIAN_PACKAGE_DEPENDS "libc6 (>= 2.27)")
set(CPACK_DEBIAN_PACKAGE_SECTION "devel")
set(CPACK_DEBIAN_ARCHITECTURE ${CMAKE_SYSTEM_PROCESSOR})

include(CPack)

cpack_add_component_group(Development)
cpack_add_component(
  Headers
  DISPLAY_NAME "C++ Headers"
  DESCRIPTION "C++ header files for SimpleLibrary"
  GROUP Development
  REQUIRED)
cpack_add_component(
  Libraries
  DISPLAY_NAME "Libraries"
  DESCRIPTION "Shared and static libraries for SimpleLibrary"
  GROUP Development
  REQUIRED)

cpack_add_component(
  Doxygen
  DISPLAY_NAME "Doxygen Documentation"
  DESCRIPTION "API documentation generated by Doxygen"
  GROUP Development
  REQUIRED)