cmake_minimum_required(VERSION 3.0.0)
project(awesome C)

# Require an out-of-source build. We generate an awesomerc.lua in the build dir
# from the one in the source dir and this does not work otherwise.
if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
    message(SEND_ERROR "\
You appear to be doing an in-source build, which means that the binaries are \
generated in the same directory where the source code is. This is currently not \
supported. Instead, do, for example, the following:\n\
   mkdir build && cd build && cmake ..\n\
Beware that CMake likely already generated a CMakeCache.txt in the source \
directory which you first have to delete. \
")
    message(FATAL_ERROR "In-source builds are not supported")
endif()

set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS  TRUE)

if(COMMAND cmake_policy)
    cmake_policy(VERSION 2.6)
endif()

set(SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(BUILD_DIR ${CMAKE_CURRENT_BINARY_DIR})

if(NOT EXISTS ${SOURCE_DIR}/awesomeConfig.cmake)
    message(FATAL_ERROR "Please provide awesomeConfig.cmake")
endif()

# Define many variables

include(awesomeConfig.cmake)

include_directories(
    ${BUILD_DIR}
    ${AWESOME_COMMON_REQUIRED_INCLUDE_DIRS}
    ${AWESOME_REQUIRED_INCLUDE_DIRS}
    ${AWESOME_OPTIONAL_INCLUDE_DIRS})

set(AWE_ICON_DIR ${SOURCE_DIR}/icons)
set(AWE_THEMES_DIR ${SOURCE_DIR}/themes)

set(AWE_DOC_DIR ${BUILD_DIR}/docs)

set(AWE_DOC_FILES
    ${AWE_DOC_DIR}/00-authors.md
    ${AWE_DOC_DIR}/01-readme.md
    ${AWE_DOC_DIR}/02-contributing.md
    ${SOURCE_DIR}/LICENSE)

set(AWE_SRCS
    ${BUILD_DIR}/awesome.c
    ${BUILD_DIR}/banning.c
    ${BUILD_DIR}/color.c
    ${BUILD_DIR}/dbus.c
    ${BUILD_DIR}/draw.c
    ${BUILD_DIR}/event.c
    ${BUILD_DIR}/ewmh.c
    ${BUILD_DIR}/keygrabber.c
    ${BUILD_DIR}/luaa.c
    ${BUILD_DIR}/mouse.c
    ${BUILD_DIR}/mousegrabber.c
    ${BUILD_DIR}/property.c
    ${BUILD_DIR}/root.c
    ${BUILD_DIR}/selection.c
    ${BUILD_DIR}/spawn.c
    ${BUILD_DIR}/stack.c
    ${BUILD_DIR}/strut.c
    ${BUILD_DIR}/systray.c
    ${BUILD_DIR}/xwindow.c
    ${BUILD_DIR}/xkb.c
    ${BUILD_DIR}/xrdb.c
    ${BUILD_DIR}/common/atoms.c
    ${BUILD_DIR}/common/backtrace.c
    ${BUILD_DIR}/common/buffer.c
    ${BUILD_DIR}/common/luaclass.c
    ${BUILD_DIR}/common/lualib.c
    ${BUILD_DIR}/common/luaobject.c
    ${BUILD_DIR}/common/util.c
    ${BUILD_DIR}/common/version.c
    ${BUILD_DIR}/common/xcursor.c
    ${BUILD_DIR}/common/xembed.c
    ${BUILD_DIR}/common/xutil.c
    ${BUILD_DIR}/objects/button.c
    ${BUILD_DIR}/objects/client.c
    ${BUILD_DIR}/objects/drawable.c
    ${BUILD_DIR}/objects/drawin.c
    ${BUILD_DIR}/objects/key.c
    ${BUILD_DIR}/objects/screen.c
    ${BUILD_DIR}/objects/selection_watcher.c
    ${BUILD_DIR}/objects/tag.c
    ${BUILD_DIR}/objects/window.c)

set(AWE_MAN_SRCS
    ${SOURCE_DIR}/manpages/awesome.1.txt
    ${SOURCE_DIR}/manpages/awesome-client.1.txt
    ${SOURCE_DIR}/manpages/awesomerc.5.txt)
set(AWE_MAN_LANGS it es fr de ru)

# Don't strip RPATH if compiling on Solaris
if (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
    set(CMAKE_SKIP_BUILD_RPATH FALSE)
    set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
    set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
endif()

add_executable(${PROJECT_AWE_NAME}
    ${AWE_SRCS})

# CFLAGS
set(AWESOME_C_FLAGS
    -O1 -std=gnu99 -ggdb3 -fno-strict-aliasing -Wall -Wextra
    -Wchar-subscripts -Wundef -Wshadow -Wcast-align -Wwrite-strings
    -Wsign-compare -Wunused -Wno-unused-parameter -Wuninitialized -Winit-self
    -Wpointer-arith -Wformat-nonliteral
    -Wno-format-zero-length -Wmissing-format-attribute -Wmissing-prototypes
    -Wstrict-prototypes
    CACHE STRING "CFLAGS used to compile ${PROJECT_AWE_NAME}")
mark_as_advanced(AWESOME_C_FLAGS)
target_compile_options(${PROJECT_AWE_NAME} PRIVATE ${AWESOME_C_FLAGS})

# Make sure awesomerc.lua is generated
add_dependencies(${PROJECT_AWE_NAME} generate_awesomerc)

# Linux w/ GCC requires -rdynamic to get backtrace to fully work.
#
# For "historical reasons", CMake adds the option to the linker flags
# unnoticeably for Linux w/ GCC through its modules Linux-GNU.cmake
# and Linux-GNU-C.cmake.  Our build system has counted on that.  But
# just in case CMake should do away with the convention suddenly...
if(DEFINED CMAKE_SHARED_LIBRARY_LINK_C_FLAGS AND
        NOT CMAKE_SHARED_LIBRARY_LINK_C_FLAGS MATCHES "-rdynamic")
    target_link_libraries(${PROJECT_AWE_NAME}
        $<$<AND:$<PLATFORM_ID:Linux>,$<C_COMPILER_ID:GNU>>:-rdynamic>)
endif()

# FreeBSD requires dynamic linking
if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
    set_target_properties(${PROJECT_AWE_NAME}
        PROPERTIES
        LINK_FLAGS -export-dynamic)
endif()

target_link_libraries(${PROJECT_AWE_NAME}
    ${AWESOME_COMMON_REQUIRED_LDFLAGS}
    ${AWESOME_REQUIRED_LDFLAGS}
    ${AWESOME_OPTIONAL_LDFLAGS})

# {{{ Generated sources
# atoms
file(MAKE_DIRECTORY ${BUILD_DIR}/common)
add_custom_command(
    COMMAND ${SOURCE_DIR}/build-utils/atoms-ext.sh ${SOURCE_DIR}/common/atoms.list
    ARGS    > ${BUILD_DIR}/common/atoms-extern.h
    OUTPUT  ${BUILD_DIR}/common/atoms-extern.h
    WORKING_DIRECTORY ${SOURCE_DIR}
    DEPENDS ${SOURCE_DIR}/common/atoms.list
    COMMENT "Generating atoms-extern.h"
    VERBATIM)

add_custom_command(
    COMMAND ${SOURCE_DIR}/build-utils/atoms-int.sh ${SOURCE_DIR}/common/atoms.list
    ARGS    > ${BUILD_DIR}/common/atoms-intern.h
    OUTPUT  ${BUILD_DIR}/common/atoms-intern.h
    WORKING_DIRECTORY ${SOURCE_DIR}
    DEPENDS ${SOURCE_DIR}/common/atoms.list
    COMMENT "Generating atoms-intern.h"
    VERBATIM)

add_custom_target(generated_sources
    DEPENDS ${BUILD_DIR}/common/atoms-intern.h
            ${BUILD_DIR}/common/atoms-extern.h)

# Default theme directory
file(MAKE_DIRECTORY ${BUILD_DIR}/themes/default)
file(MAKE_DIRECTORY ${BUILD_DIR}/themes/sky)
file(MAKE_DIRECTORY ${BUILD_DIR}/themes/zenburn)
file(MAKE_DIRECTORY ${BUILD_DIR}/themes/xresources)
add_dependencies(${PROJECT_AWE_NAME} generated_sources)
# }}}

# {{{ Version stamp
if(BUILD_FROM_GIT)
    add_custom_target(version_stamp ALL
        COMMAND ${SOURCE_DIR}/build-utils/git-version-stamp.sh
                ${VERSION_STAMP_FILE}
                ${BUILD_DIR}/awesome-version-internal.h
        WORKING_DIRECTORY ${SOURCE_DIR})

    add_dependencies(${PROJECT_AWE_NAME} version_stamp)
endif()
# }}}

# {{{ Manpages
if(GENERATE_MANPAGES)
    if(NOT BUILD_DIR STREQUAL SOURCE_DIR)
        file(MAKE_DIRECTORY ${BUILD_DIR}/manpages)
    endif()

    # add the default translation to the list of languages
    set(AWE_MAN_LANGS default ${AWE_MAN_LANGS})

    foreach(lang ${AWE_MAN_LANGS})

        foreach(txtfile ${AWE_MAN_SRCS})
            # figure the base name of the file (ie "awesome.1")
            GET_FILENAME_COMPONENT(tmpname ${txtfile} NAME)
            string(REGEX REPLACE ".txt\$" "" basename ${tmpname})

            # figure the relative path of the file
            GET_FILENAME_COMPONENT(tmppath ${txtfile} PATH)
            string(REPLACE ${SOURCE_DIR}/ "" relpath ${tmppath})

            # figure the manpage section to install to from filename
            string(REGEX REPLACE "^.*\\.([0-9])$" "\\1" section ${basename})

            # construct the language specific versions of the basename and path
            if (lang STREQUAL default)
                set(basename2 ${basename})
                set(relpath2 ${relpath}/man${section})
            else()
                set(basename2 ${basename}.${lang})
                set(relpath2 ${relpath}/${lang}/man${section})
            endif()

            # create the build directory (if it does not exist)
            file(MAKE_DIRECTORY ${BUILD_DIR}/${relpath2})

            # set the final filenames
            set(txtfile ${SOURCE_DIR}/${relpath}/${basename2}.txt)
            set(gzfile  ${BUILD_DIR}/${relpath2}/${basename}.gz)
            set(manfile ${BUILD_DIR}/${relpath2}/${basename})

            if (lang STREQUAL default)
                set(asciilang en)
            else()
                set(asciilang ${lang})
            endif()
            add_custom_command(
                COMMAND ${ASCIIDOCTOR_EXECUTABLE} -a lang=${asciilang} -d manpage -b manpage -o ${manfile} ${txtfile}
                WORKING_DIRECTORY ${BUILD_DIR}/${relpath2}
                OUTPUT  ${manfile}
                DEPENDS ${txtfile}
                VERBATIM)

            if(COMPRESS_MANPAGES)
                add_custom_command(
                    COMMAND ${GZIP_EXECUTABLE} < ${manfile} > ${gzfile}
                    OUTPUT  ${gzfile}
                    WORKING_DIRECTORY ${BUILD_DIR}/${relpath2}
                    DEPENDS ${manfile}
                    VERBATIM)

                set(MAN_FILES ${MAN_FILES} ${gzfile})
            else()
                set(MAN_FILES ${MAN_FILES} ${manfile})
            endif()
        endforeach()

    endforeach()

    add_custom_target(man ALL DEPENDS ${MAN_FILES})
endif()
# }}}

# {{{ Lua API Documentation
if(GENERATE_DOC)
    if(NOT BUILD_DIR STREQUAL SOURCE_DIR)
        file(MAKE_DIRECTORY ${BUILD_DIR}/lib)
        file(MAKE_DIRECTORY ${BUILD_DIR}/doc)
    endif()

    file(GLOB_RECURSE AWE_LUA_FILES ${BUILD_DIR}/lib/*.lua)
    file(GLOB_RECURSE AWE_MD_FILES ${AWE_DOC_DIR}/*.md)
    file(GLOB_RECURSE AWE_MD_LUA_FILES RELATIVE "${SOURCE_DIR}/docs" docs/*.md.lua)
    foreach(file ${AWE_MD_LUA_FILES})
        # Remove .lua file extensions
        string(REPLACE ".lua" "" file ${file})
        list(APPEND AWE_MD_FILES "${AWE_DOC_DIR}/${file}")
    endforeach()

    # Copy the images to the build directory
    file(COPY ${SOURCE_DIR}/docs/images DESTINATION ${BUILD_DIR}/doc)

    # Copy the aliases to the build directory
    file(COPY ${SOURCE_DIR}/docs/aliases DESTINATION ${BUILD_DIR}/docs)

    # Copy ldoc files.
    configure_file(${SOURCE_DIR}/docs/ldoc.css ${BUILD_DIR}/docs COPYONLY)
    configure_file(${SOURCE_DIR}/docs/ldoc.ltp ${BUILD_DIR}/docs COPYONLY)

    add_custom_target(ldoc ALL
        DEPENDS ${BUILD_DIR}/doc/index.html
    )

    if (STRICT_TESTS)
        set(ldoc_args --fatalwarnings .)
        set(ldoc_desc_suffix " (fatal warnings)")
    else()
        set(ldoc_args .)
    endif()
    add_custom_command(
        OUTPUT  ${BUILD_DIR}/doc/index.html
        COMMAND ${LDOC_EXECUTABLE} ${ldoc_args}
        WORKING_DIRECTORY ${AWE_DOC_DIR}
        DEPENDS
            ${AWE_SRCS}
            ${AWE_LUA_FILES}
            ${AWE_MD_FILES}
            ${BUILD_DIR}/docs/config.ld
            ${BUILD_DIR}/docs/ldoc.css
            ${BUILD_DIR}/docs/ldoc.ltp
            generate_awesomerc
            generate-examples
        COMMENT "Generating API documentation${ldoc_desc_suffix}")
endif()
# }}}

# {{{ Theme icons
file(GLOB_RECURSE icon_sources RELATIVE ${SOURCE_DIR} ${SOURCE_DIR}/themes/*.png)

foreach(icon ${icon_sources})
    # Copy all icons to the build dir to simplify the following code.
    # Source paths are interpreted relative to ${SOURCE_DIR}, target paths
    # relative to ${BUILD_DIR}.
    get_filename_component(icon_path ${icon} PATH)
    get_filename_component(icon_name ${icon} NAME)
    file(COPY ${icon} DESTINATION ${icon_path})
    set(ALL_ICONS ${ALL_ICONS} "${icon_path}/${icon_name}")
endforeach()

macro(a_icon_convert match replacement input)
    string(REPLACE ${match} ${replacement} output ${input})

    if(NOT ${input} STREQUAL ${output} AND NOT ";${ALL_ICONS};" MATCHES ";${output};")
        set(ALL_ICONS ${ALL_ICONS} ${output})

        add_custom_command(
            COMMAND ${CONVERT_EXECUTABLE} ${input} -strip ${ARGN} ${output}
            OUTPUT  ${output}
            DEPENDS ${input}
            VERBATIM)
    endif()
endmacro()

foreach(icon ${ALL_ICONS})
    # Make unfocused icons translucent
    a_icon_convert("_focus" "_normal" ${icon}
        -colorspace rgb -gamma 0.6 -channel A -evaluate Multiply 0.4)
endforeach()

foreach(icon ${ALL_ICONS})
    # Make inactive icons grayscale
    a_icon_convert("_active" "_inactive" ${icon}
        -colorspace Gray)
endforeach()

add_custom_target(generated_icons ALL DEPENDS ${ALL_ICONS})
# }}}

# {{{ Dist tarball
if(BUILD_FROM_GIT)
    add_custom_target(dist
        COMMAND ${SOURCE_DIR}/build-utils/dist.sh ${VERSION}
        WORKING_DIRECTORY ${SOURCE_DIR})
endif()
# }}}

# {{{ Installation
install(TARGETS ${PROJECT_AWE_NAME} RUNTIME DESTINATION bin)
install(FILES "utils/awesome-client" DESTINATION bin PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
install(DIRECTORY ${BUILD_DIR}/lib DESTINATION ${AWESOME_DATA_PATH}
    PATTERN "*.in" EXCLUDE)
install(FILES ${BUILD_DIR}/awesomerc.lua DESTINATION ${AWESOME_SYSCONFDIR}
        RENAME rc.lua)
if(GENERATE_MANPAGES)
    if(COMPRESS_MANPAGES)
        set(regex "\\.(xml|txt|[0-9])$")
    else()
        set(regex "\\.(xml|txt|gz)$")
    endif()
    install(DIRECTORY ${BUILD_DIR}/${relpath}/ DESTINATION ${AWESOME_MAN_PATH}
            REGEX ${regex} EXCLUDE )
endif()
install(DIRECTORY ${AWE_ICON_DIR} DESTINATION ${AWESOME_DATA_PATH})
install(DIRECTORY ${SOURCE_DIR}/themes DESTINATION ${AWESOME_DATA_PATH}
    PATTERN "*.lua" EXCLUDE)
install(DIRECTORY ${BUILD_DIR}/themes DESTINATION ${AWESOME_DATA_PATH}
    PATTERN "*.lua")
install(FILES ${AWE_DOC_FILES}  DESTINATION ${AWESOME_DOC_PATH})
install(FILES "awesome.desktop" DESTINATION ${AWESOME_XSESSION_PATH})
if(GENERATE_DOC)
    install(DIRECTORY ${BUILD_DIR}/doc DESTINATION ${AWESOME_DOC_PATH})
endif()
# }}}

# {{{ Tests
add_custom_target(check DEPENDS check-integration)

add_executable(test-gravity tests/test-gravity.c)
target_link_libraries(test-gravity
    ${AWESOME_COMMON_REQUIRED_LDFLAGS} ${AWESOME_REQUIRED_LDFLAGS})
if(DO_COVERAGE)
    set(TESTS_RUN_ENV DO_COVERAGE=1)
endif()
add_custom_target(check-integration
    ${CMAKE_COMMAND} -E env CMAKE_BINARY_DIR='${CMAKE_BINARY_DIR}' ${TESTS_RUN_ENV} ./tests/run.sh \$\${TEST_RUN_ARGS:--W}
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    COMMENT "Running integration tests"
    DEPENDS ${PROJECT_AWE_NAME}
    USES_TERMINAL)
add_dependencies(check-integration test-gravity)
add_custom_target(check-themes
    ${CMAKE_COMMAND} -E env CMAKE_BINARY_DIR='${CMAKE_BINARY_DIR}' ${TESTS_RUN_ENV} ./tests/themes/run.sh
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    COMMENT "Testing themes"
    USES_TERMINAL
    DEPENDS generated_icons generate_awesomerc ${PROJECT_AWE_NAME})
add_dependencies(check check-themes)

add_custom_target(check-requires
    lua "${CMAKE_SOURCE_DIR}/build-utils/check_for_invalid_requires.lua"
    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    COMMENT "Checking use of require()"
    USES_TERMINAL
    VERBATIM)
list(APPEND CHECK_QA_TARGETS check-requires)
a_find_program(BUSTED_EXECUTABLE busted FALSE)
if(BUSTED_EXECUTABLE)
    if(DO_COVERAGE)
        set(BUSTED_ARGS "--coverage")
    else()
        set(BUSTED_ARGS)
    endif()
    add_custom_target(check-unit
        COMMAND ${BUSTED_EXECUTABLE} ${BUSTED_ARGS}
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
        COMMENT "Running unit tests"
        VERBATIM)
else()
    add_custom_target(check-unit true
        COMMENT "Skipping check-unit, since busted was not found (during configuration)"
        VERBATIM)
endif()
add_dependencies(check check-unit)

a_find_program(LUACHECK_EXECUTABLE luacheck FALSE)
if(LUACHECK_EXECUTABLE)
    add_custom_target(luacheck
        ${LUACHECK_EXECUTABLE} lib spec tests themes awesomerc.lua
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
        COMMENT "Running Luacheck"
        VERBATIM)
    list(APPEND CHECK_QA_TARGETS luacheck)
endif()
add_custom_target(check-qa DEPENDS ${CHECK_QA_TARGETS})
add_dependencies(check check-qa check-examples)
# }}}

INCLUDE(${CMAKE_SOURCE_DIR}/Packaging.cmake)

# vim: filetype=cmake:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80:foldmethod=marker