##
## Licensed to the Apache Software Foundation (ASF) under one
## or more contributor license agreements.  See the NOTICE file
## distributed with this work for additional information
## regarding copyright ownership.  The ASF licenses this file
## to you under the Apache License, Version 2.0 (the
## "License"); you may not use this file except in compliance
## with the License.  You may obtain a copy of the License at
##
##   http://www.apache.org/licenses/LICENSE-2.0
##
## Unless required by applicable law or agreed to in writing,
## software distributed under the License is distributed on an
## "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
## KIND, either express or implied.  See the License for the
## specific language governing permissions and limitations
## under the License.
##

cmake_minimum_required(VERSION 2.8.12)
project(qpid-dispatch C CXX)

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
set(CMAKE_MACOSX_RPATH TRUE)
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

# Set default build type. Must use FORCE because project() sets default to ""
if (NOT CMAKE_BUILD_TYPE)
  set (CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING
    "Build type: Debug, Release, RelWithDebInfo, MinSizeRel or Coverage (default RelWithDebInfo)" FORCE)
endif(NOT CMAKE_BUILD_TYPE)
if (CMAKE_BUILD_TYPE MATCHES "Deb|Cover")
  set (has_debug_symbols " (has debug symbols)")
endif (CMAKE_BUILD_TYPE MATCHES "Deb|Cover")
message(STATUS "Build type is \"${CMAKE_BUILD_TYPE}\"${has_debug_symbols}")
# This is commonly needed so define it before we include anything else.
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)

option(QD_MEMORY_STATS "Track memory pool usage statistics" ON)

if(uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
    option(QD_ENABLE_ASSERTIONS "Enable assertions" ON)
else()
    option(QD_ENABLE_ASSERTIONS "Enable assertions" OFF)
endif()

file(STRINGS "${CMAKE_SOURCE_DIR}/VERSION.txt" QPID_DISPATCH_VERSION)

include(CheckLibraryExists)
include(CheckSymbolExists)
include(CheckFunctionExists)
include(CheckIncludeFiles)
include(CMakeDependentOption)

##
## Find dependencies
##
if (NOT APPLE)
  find_library(rt_lib rt)
else (NOT APPLE)
  set(rt "")
endif (NOT APPLE)

find_package(PythonInterp REQUIRED)
find_package(PythonLibs REQUIRED)
find_package(Threads REQUIRED)
find_package(Proton 0.33.0 REQUIRED COMPONENTS Core Proactor)
message(STATUS "Found Proton: ${Proton_LIBRARIES} (found version \"${Proton_VERSION}\")" )
##
## Optional dependencies
##

# http2 support is optional
find_package(libnghttp2 1.33.0)
CMAKE_DEPENDENT_OPTION(USE_LIBNGHTTP2 "Use libnghttp2 for HTTP/2 support" ON
                         "libnghttp2_FOUND" OFF)

# Web Sockets
find_package(LibWebSockets 2.4.2)
CMAKE_DEPENDENT_OPTION(USE_LIBWEBSOCKETS "Use libwebsockets for WebSocket support" ON
                         "LIBWEBSOCKETS_FOUND" OFF)

set(SKIP_DELETE_HTTP_LISTENER "True")
if (LIBWEBSOCKETS_FOUND AND LIBWEBSOCKETS_VERSION_STRING)
  # This is a fix for DISPATCH-1513. libwebsockets versions 3.2.0 introduces a new flag called LWS_SERVER_OPTION_ALLOW_HTTP_ON_HTTPS_LISTENER
  # The new flag allows (as the flag says) HTTP pver HTTPS listeners. Since this flag is not available before lws 3.2.0 we need
  # to selectively comment out a test.
  set(TEST_OPTION_ALLOW_HTTP_ON_HTTPS_LISTENER "#")
  set(LWS_VERSION_WITH_SSL_FIX "3.2.0")
  if ((LIBWEBSOCKETS_VERSION_STRING STREQUAL LWS_VERSION_WITH_SSL_FIX) OR (LIBWEBSOCKETS_VERSION_STRING STRGREATER  LWS_VERSION_WITH_SSL_FIX))
    set(TEST_OPTION_ALLOW_HTTP_ON_HTTPS_LISTENER "")
  endif()
  # The listener delete functionality worked in all versions of LibWebSockets
  # starting from v2.4.2 thru v3.2.3. It stopped working in v4.0.0 and beyond
  if ( (LIBWEBSOCKETS_VERSION_STRING STREQUAL "2.4.2") OR (  (LIBWEBSOCKETS_VERSION_STRING STRGREATER_EQUAL  "3.0.0") AND (LIBWEBSOCKETS_VERSION_STRING STRLESS  "4.0.0") )  )
    # Do not skip the tests (in system_tests_http.py) that specifically
    # test deletion of http:yes listeners.
    set(SKIP_DELETE_HTTP_LISTENER "False")
  endif()

endif(LIBWEBSOCKETS_FOUND AND LIBWEBSOCKETS_VERSION_STRING)

# Python
if (PYTHON_VERSION_MAJOR STREQUAL 3)
    set(PY_STRING "python3")
elseif(PYTHON_VERSION_MAJOR STREQUAL 2)
    set(PY_STRING "python")
endif()

enable_testing()

# python unittest
# For versions < 2.7 the developer needs to install the unittest2
# module (available via 'yum install python-unittest2' or 'pip install unittest2'
#
if(PYTHON_VERSION_MAJOR EQUAL 2 AND PYTHON_VERSION_MINOR LESS 7)
  set(PYTHON_TEST_COMMAND "unit2")
  execute_process(COMMAND "${PYTHON_EXECUTABLE}" "-c" "import unittest2"
                  RESULT_VARIABLE UNITTEST_MISSING
                  ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
  if(UNITTEST_MISSING)
    message(WARNING "python-unittest2 is not installed. ***unit tests cannot be run***\ntry 'pip install python-unittest2' to install python-unittest2")
    # add bogus test for folk who may have missed the cmake warning
    add_test(WARNING_python_unittest2_module_NOT_INSTALLED false)
  endif(UNITTEST_MISSING)
else(PYTHON_VERSION_MAJOR EQUAL 2 AND PYTHON_VERSION_MINOR LESS 7)
  set(PYTHON_TEST_COMMAND "-m" "unittest")
endif(PYTHON_VERSION_MAJOR EQUAL 2 AND PYTHON_VERSION_MINOR LESS 7)

if(NOT UNITTEST_MISSING)
  if (NOT DEFINED DISPATCH_TEST_TIMEOUT)
    set(DISPATCH_TEST_TIMEOUT "600")
  endif (NOT DEFINED DISPATCH_TEST_TIMEOUT)
  SET(DART_TESTING_TIMEOUT ${DISPATCH_TEST_TIMEOUT} CACHE STRING "Default CTest timeout in seconds")
  include (CTest)
endif(NOT UNITTEST_MISSING)

set (SO_VERSION_MAJOR 2)
set (SO_VERSION_MINOR 0)
set (SO_VERSION "${SO_VERSION_MAJOR}.${SO_VERSION_MINOR}")

if (NOT DEFINED LIB_SUFFIX)
    get_property(LIB64 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS)
    if ("${LIB64}" STREQUAL "TRUE" AND ${CMAKE_SIZEOF_VOID_P} STREQUAL "8")
        set(LIB_SUFFIX 64)
    else()
        set(LIB_SUFFIX "")
    endif()
endif()

set(INCLUDE_INSTALL_DIR include CACHE PATH "Include file directory")
set(QPID_DISPATCH_HOME "lib/qpid-dispatch" CACHE PATH "Private Dispatch library directory")
set(LIB_INSTALL_DIR "lib${LIB_SUFFIX}" CACHE PATH "Library object file directory")
set(SHARE_INSTALL_DIR share CACHE PATH "Shared read only data directory")
set(DOC_INSTALL_DIR ${SHARE_INSTALL_DIR}/doc CACHE PATH "Documentation directory")
set(QD_DOC_INSTALL_DIR ${SHARE_INSTALL_DIR}/doc/qpid-dispatch CACHE PATH "Qpid Dispatch documentation directory")
set(MAN_INSTALL_DIR share/man CACHE PATH "Manpage directory")
set(QPID_DISPATCH_HOME_INSTALLED ${CMAKE_INSTALL_PREFIX}/${QPID_DISPATCH_HOME})

set(CONSOLE_BASE_INSTALL_DIR "share/qpid-dispatch/console")
set(CONSOLE_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${CONSOLE_BASE_INSTALL_DIR}")
set(CONSOLE_STAND_ALONE_INSTALL_DIR "${CONSOLE_INSTALL_DIR}")

set(RUN ${PYTHON_EXECUTABLE} ${CMAKE_BINARY_DIR}/run.py)

# define the configuration directory based on whether or not the install prefix is defined
if(NOT DEFINED SYSCONF_INSTALL_DIR)
    if(CMAKE_INSTALL_PREFIX STREQUAL "/usr")
        set(SYSCONF_INSTALL_DIR "/etc")
    else()
        set(SYSCONF_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/etc")
    endif()
endif()

set(QPID_DISPATCH_CONFDIR ${SYSCONF_INSTALL_DIR}/qpid-dispatch)

if (NOT COMMAND add_compile_options)
  macro (add_compile_options option)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${option}")
  endmacro (add_compile_options)
endif (NOT COMMAND add_compile_options)

# Set up runtime checks (valgrind, sanitizers etc.)
include(cmake/RuntimeChecks.cmake)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${SANITIZE_FLAGS}")

##
## Include directories used by all sub-directories.
##
include_directories(
    ${CMAKE_CURRENT_SOURCE_DIR}/include
    ${CMAKE_CURRENT_BINARY_DIR}/include
    ${Proton_Proactor_INCLUDE_DIRS}
    ${Proton_Core_INCLUDE_DIRS}
    ${PYTHON_INCLUDE_PATH}
    )

# Originally from the LLVM project, https://opensource.apple.com/source/llvmCore/llvmCore-2358.3/CMakeLists.txt.auto.html
if(QD_ENABLE_ASSERTIONS)
    # MSVC doesn't like _DEBUG on release builds.
    if(NOT MSVC)
        add_definitions(-D_DEBUG)
    endif()
    # On non-Debug builds cmake automatically defines NDEBUG, so we explicitly undefine it:
    if(NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
        # NOTE: use `add_compile_options` rather than `add_definitions` since
        # `add_definitions` does not support generator expressions.
        add_compile_options($<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:-UNDEBUG>)

        # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
        foreach (flags_var_to_scrub
                CMAKE_CXX_FLAGS_RELEASE
                CMAKE_CXX_FLAGS_RELWITHDEBINFO
                CMAKE_CXX_FLAGS_MINSIZEREL
                CMAKE_C_FLAGS_RELEASE
                CMAKE_C_FLAGS_RELWITHDEBINFO
                CMAKE_C_FLAGS_MINSIZEREL)
            string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
                    "${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
        endforeach()
    endif()
endif()

if (NOT CMAKE_SYSTEM_NAME STREQUAL SunOS)
 add_compile_options(-Werror)
 add_compile_options(-Wall)
 include(CheckCCompilerFlag)
 check_c_compiler_flag(-Wpedantic HAS_PEDANTIC_FLAG)
 if (HAS_PEDANTIC_FLAG)
    add_compile_options(-Wpedantic)
 endif(HAS_PEDANTIC_FLAG)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
 if (CMAKE_BUILD_TYPE MATCHES "Coverage")
   set (CMAKE_C_FLAGS_COVERAGE "-g -O0 --coverage")
   set (CMAKE_EXE_LINKER_FLAGS_COVERAGE "--coverage")
   set (CMAKE_MODULE_LINKER_FLAGS_COVERAGE "--coverage")
   set (CMAKE_SHARED_LINKER_FLAGS_COVERAGE "--coverage")
   mark_as_advanced(
     CMAKE_C_FLAGS_COVERAGE
     CMAKE_EXE_LINKER_FLAGS_COVERAGE
     CMAKE_MODULE_LINKER_FLAGS_COVERAGE
     CMAKE_SHARED_LINKER_FLAGS_COVERAGE)
   make_directory(${CMAKE_BINARY_DIR}/coverage_results)
   add_custom_target(coverage
     WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/coverage_results
     COMMAND ${CMAKE_SOURCE_DIR}/bin/record-coverage.sh ${CMAKE_SOURCE_DIR} ${CMAKE_BINARY_DIR})
 endif(CMAKE_BUILD_TYPE MATCHES "Coverage")
else (NOT CMAKE_SYSTEM_NAME STREQUAL SunOS)
 add_compile_options(-xc99)
 add_compile_options(-errwarn=%all)
endif (NOT CMAKE_SYSTEM_NAME STREQUAL SunOS)

if (CMAKE_C_COMPILER_ID MATCHES "Clang")
  add_compile_options(-Wno-gnu-statement-expression)
endif()

##
## Header file installation
##
file(GLOB headers "include/qpid/dispatch/*.h")
install(FILES ${headers} DESTINATION ${INCLUDE_INSTALL_DIR}/qpid/dispatch)
install(FILES include/qpid/dispatch.h DESTINATION ${INCLUDE_INSTALL_DIR}/qpid)
install(FILES etc/qdrouterd.conf DESTINATION ${SYSCONF_INSTALL_DIR}/qpid-dispatch)
install(FILES etc/sasl2/qdrouterd.conf DESTINATION ${SYSCONF_INSTALL_DIR}/sasl2)

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tools/qdstat.in ${CMAKE_CURRENT_SOURCE_DIR}/tools/qdstat)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tools/qdmanage.in ${CMAKE_CURRENT_SOURCE_DIR}/tools/qdmanage)


# Tools
install(PROGRAMS
    ${CMAKE_CURRENT_SOURCE_DIR}/tools/qdstat
    ${CMAKE_CURRENT_SOURCE_DIR}/tools/qdmanage
    DESTINATION bin)

# Doc files
install(FILES
  LICENSE
  README
  DESTINATION ${QD_DOC_INSTALL_DIR})

add_subdirectory(src) # Build src first so other subdirs can use QPID_DISPATCH_LIB

# run.py environment runner script - needs QPID_DISPATCH_LIB
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/run.py.in ${CMAKE_CURRENT_BINARY_DIR}/run.py)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/run.py.in ${CMAKE_CURRENT_BINARY_DIR}/tests/run.py)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tests/authservice.py.in ${CMAKE_CURRENT_SOURCE_DIR}/tests/authservice.py)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tests/failoverserver.py.in ${CMAKE_CURRENT_SOURCE_DIR}/tests/failoverserver.py)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tests/system_tests_authz_service_plugin.py.in ${CMAKE_CURRENT_SOURCE_DIR}/tests/system_tests_authz_service_plugin.py)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tests/system_tests_handle_failover.py.in ${CMAKE_CURRENT_SOURCE_DIR}/tests/system_tests_handle_failover.py)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tests/system_tests_http.py.in ${CMAKE_CURRENT_SOURCE_DIR}/tests/system_tests_http.py)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/tests/system_tests_topology_disposition.py.in ${CMAKE_CURRENT_SOURCE_DIR}/tests/system_tests_topology_disposition.py)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/python/qpid_dispatch_internal/management/agent.py.in ${CMAKE_CURRENT_SOURCE_DIR}/python/qpid_dispatch_internal/management/agent.py)
execute_process(COMMAND ${RUN} --sh OUTPUT_FILE config.sh)

if (NOT UNITTEST_MISSING)
  file(GLOB SCRAPER_SRC ${CMAKE_CURRENT_SOURCE_DIR}/tools/scraper/*.py)
  file(COPY ${SCRAPER_SRC} DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/tests/scraper/)
  add_subdirectory(tests)
endif(NOT UNITTEST_MISSING)
add_subdirectory(python)
add_subdirectory(router)
add_subdirectory(docs)
add_subdirectory(console)

# reconfigure.in is a workaround to force cmake re-configuration. For example,
# we use GLOB to collect .h files for install and apidoc, so if you _remove_ a
# .h file it won't trigger automatic re-configure and everybody's builds will
# fail till they run cmake manually.
#
# If you do check in such a change, increase the number in this file by 1.
# That will force automatic re-configure and everybody will be happy.
#
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/reconfigure.in ${CMAKE_CURRENT_BINARY_DIR}/reconfigure)