cmake_minimum_required(VERSION 2.4)
if(COMMAND cmake_policy)
    if(POLICY CMP0026)
        cmake_policy(SET CMP0026 OLD)
    endif()
endif()
project(postsrsd C)
include(CheckIncludeFile)

option(GENERATE_SRS_SECRET "Generate a random SRS secret if none exists during install" ON)
option(USE_APPARMOR "Enable AppArmor profile" OFF)
option(USE_SELINUX "Enable SELinux policy module" OFF)

set(CHROOT_DIR "${CMAKE_INSTALL_PREFIX}/lib/${PROJECT_NAME}" CACHE PATH "Chroot jail for daemon")
set(SYSCONF_DIR "/etc" CACHE PATH "Global system configuration folder")
set(SYSD_UNIT_DIR "${SYSCONF_DIR}/systemd/system" CACHE PATH "Systemd unit file folder")
set(CONFIG_DIR "${SYSCONF_DIR}/default" CACHE PATH "Location of startup configuration file")
set(DOC_DIR "share/doc/${PROJECT_NAME}" CACHE PATH "Path for documentation files")
mark_as_advanced(CHROOT_DIR SYSCONF_DIR SYSD_UNIT_DIR CONFIG_DIR DOC_DIR)

find_program(HELP2MAN help2man DOC "path to help2man executable")
find_program(DD dd DOC "path to dd executable")
find_program(BASE64 base64 DOC "path to base64 executable")
find_program(OPENSSL openssl DOC "path to OpenSSL executable")
find_program(INSSERV insserv DOC "path to insserv executable")
find_program(CHKCONFIG chkconfig DOC "path to chkconfig executable")
find_library(LIBSOCKET socket)
find_library(LIBNSL nsl)

if(BASE64)
    set(BASE64_ENCODE "${BASE64}")
elseif(OPENSSL)
    set(BASE64_ENCODE "${OPENSSL} base64 -e")
else()
    set(BASE64_ENCODE "")
endif()

check_include_file(sys/wait.h HAVE_SYS_WAIT_H)
if(HAVE_SYS_WAIT_H)
    add_definitions(-DHAVE_SYS_WAIT_H)
endif()
check_include_file(wait.h HAVE_WAIT_H)
if(HAVE_WAIT_H)
    add_definitions(-DHAVE_WAIT_H)
endif()
check_include_file(sys/time.h HAVE_SYS_TIME_H)
if(HAVE_SYS_TIME_H)
    add_definitions(-DHAVE_SYS_TIME_H)
endif()
check_include_file(time.h HAVE_TIME_H)
if(HAVE_TIME_H)
    add_definitions(-DHAVE_TIME_H)
endif()
check_include_file(alloca.h HAVE_ALLOCA_H)
if(HAVE_ALLOCA_H)
    add_definitions(-DHAVE_ALLOCA_H)
endif()
check_include_file(sys/types.h HAVE_SYS_TYPES_H)
if(HAVE_SYS_TYPES_H)
    add_definitions(-DHAVE_SYS_TYPES_H)
endif()

if(NOT DEFINED INIT_FLAVOR)
	if(IS_DIRECTORY "${SYSD_UNIT_DIR}" AND EXISTS "/usr/lib/systemd/systemd")
        message(STATUS "Detected init flavor: systemd")
        set(INIT_FLAVOR "systemd" CACHE STRING "Init daemon of this system")
    elseif(IS_DIRECTORY "${SYSCONF_DIR}/init" AND EXISTS "/lib/init/upstart-job")
        message(STATUS "Detected init flavor: upstart")
        set(INIT_FLAVOR "upstart" CACHE STRING "Init daemon of this system")
    elseif(IS_DIRECTORY "${SYSCONF_DIR}/init.d" AND EXISTS "${SYSCONF_DIR}/init.d/functions")
        message(STATUS "Detected init flavor: sysv-redhat")
        set(INIT_FLAVOR "sysv-redhat" CACHE STRING "Init daemon of this system")
    elseif(IS_DIRECTORY "${SYSCONF_DIR}/init.d" AND EXISTS "/lib/lsb/init-functions")
        message(STATUS "Detected init flavor: sysv-lsb")
        set(INIT_FLAVOR "sysv-lsb" CACHE STRING "Init daemon of this system")
    else()
        message(STATUS "Detected init flavor: none")
        message(STATUS "System startup files will not be installed")
        set(INIT_FLAVOR "" CACHE STRING "Init daemon of this system")
    endif()
endif()

add_executable(${PROJECT_NAME} postsrsd.c sha1.c srs2.c)

if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
    target_link_libraries(${PROJECT_NAME} ${LIBSOCKET} ${LIBNSL})
endif()

get_target_property(POSTSRSD ${PROJECT_NAME} LOCATION)
get_filename_component(POSTSRSD ${POSTSRSD} NAME_WE)
set(APPARMOR_PROFILE "${CMAKE_INSTALL_PREFIX}/sbin/${POSTSRSD}")
string(REGEX REPLACE "^/+" "" APPARMOR_PROFILE "${APPARMOR_PROFILE}")
string(REPLACE "/" "." APPARMOR_PROFILE "${APPARMOR_PROFILE}")

configure_file(init/${PROJECT_NAME}.sysv-lsb.in ${PROJECT_NAME}.sysv-lsb @ONLY)
configure_file(init/${PROJECT_NAME}.sysv-redhat.in ${PROJECT_NAME}.sysv-redhat @ONLY)
configure_file(init/${PROJECT_NAME}.upstart.in ${PROJECT_NAME}.upstart @ONLY)
configure_file(init/${PROJECT_NAME}.apparmor.in ${PROJECT_NAME}.apparmor @ONLY)
configure_file(init/${PROJECT_NAME}.systemd.in ${PROJECT_NAME}.systemd @ONLY)
configure_file(init/${PROJECT_NAME}.default.in ${PROJECT_NAME}.default @ONLY)

configure_file(postinstall.cmake.in postinstall.cmake @ONLY)

if(HELP2MAN)
add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
	COMMAND ${HELP2MAN} ARGS -s8 -o${PROJECT_NAME}.8 -n "Postfix Sender Rewriting Scheme daemon" -N -h-h -v-v ${CMAKE_CURRENT_BINARY_DIR}/${POSTSRSD}
	VERBATIM
)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.8 DESTINATION "share/man/man8")
endif()

if(USE_APPARMOR)
	install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.apparmor DESTINATION "${SYSCONF_DIR}/apparmor.d" RENAME "${APPARMOR_PROFILE}")
endif()

if(USE_SELINUX)
	file(COPY selinux/${PROJECT_NAME}.te selinux/${PROJECT_NAME}.fc DESTINATION selinux)
	add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
		WORKING_DIRECTORY selinux
		COMMAND make -f /usr/share/selinux/devel/Makefile)
	install(FILES ${CMAKE_CURRENT_BINARY_DIR}/selinux/${PROJECT_NAME}.pp
		DESTINATION /usr/share/selinux/packages/${PROJECT_NAME})
endif()

install(TARGETS ${PROJECT_NAME} DESTINATION "sbin")
install(FILES README.md README_UPGRADE.md main.cf.ex DESTINATION "${DOC_DIR}")
install(SCRIPT "${CMAKE_CURRENT_BINARY_DIR}/postinstall.cmake")