# === This file is part of Calamares - <https://github.com/calamares> ===
#
#   Calamares is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   Calamares is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
#
#   SPDX-License-Identifier: GPL-3.0+
#   License-Filename: LICENSE
#
###
#
# Generally, this CMakeLists.txt will find all the dependencies for Calamares
# and complain appropriately. See below (later in this file) for CMake-level
# options. There are some "secret" options as well:
#
#   SKIP_MODULES    : a space or semicolon-separated list of directory names
#                     under src/modules that should not be built.
#   USE_<foo>       : fills in SKIP_MODULES for modules called <foo>-<something>
#   BUILD_<foo>     : choose additional things to build
#   DEBUG_<foo>     : special developer flags for debugging
#
# Example usage:
#
#   cmake . -DSKIP_MODULES="partition luksbootkeycfg"
#
# One special target is "show-version", which can be built
# to obtain the version number from here.

cmake_minimum_required( VERSION 3.2 FATAL_ERROR )
project( CALAMARES
    VERSION 3.2.6
    LANGUAGES C CXX )

set( CALAMARES_VERSION_RC 1 )  # Set to 0 during release cycle, 1 during development

### OPTIONS
#
option( INSTALL_CONFIG "Install configuration files" OFF )
option( INSTALL_POLKIT "Install Polkit configuration" ON )
option( BUILD_TESTING "Build the testing tree." ON )
option( WITH_PYTHON "Enable Python modules API (requires Boost.Python)." ON )
option( WITH_PYTHONQT "Enable next generation Python modules API (experimental, requires PythonQt)." ON )
option( WITH_KF5Crash "Enable crash reporting with KCrash." ON )


### USE_*
#
# By convention, when there are multiple modules that implement similar
# functionality, and it only makes sense to have **at most one** of them
# enabled at any time, those modules are named <foo>-<implementation>.
# For example, services-systemd and services-openrc.
#
# Setting up SKIP_MODULES to ignore "the ones you don't want" can be
# annoying and error-prone (e.g. if a new module shows up). The USE_*
# modules provide a way to do automatic selection. To pick exactly
# one of the implementations from group <foo>, set USE_<foo> to the
# name of the implementation. If USE_<foo> is unset, or empty, then
# all the implementations are enabled (this just means they are
# **available** to `settings.conf`, not that they are used).
#
# Currently, only USE_services is in use (to pick only one of the two
# modules, systemd or openrc).
set( USE_services "" CACHE STRING "Select the services module to use" )

### Calamares application info
#
set( CALAMARES_ORGANIZATION_NAME "Calamares" )
set( CALAMARES_ORGANIZATION_DOMAIN "github.com/calamares" )
set( CALAMARES_APPLICATION_NAME  "Calamares" )
set( CALAMARES_DESCRIPTION_SUMMARY
    "The distribution-independent installer framework" )

### Transifex (languages) info
#
# complete = 100% translated,
# good = nearly complete (use own judgement, right now >= 75%)
# ok = incomplete (more than 25% untranslated, at least 5% translated),
# bad = 0% translated, placeholder in tx; these are not included.
#
# Language en (source language) is added later. It isn't listed in
# Transifex either. Get the list of languages and their status
# from https://transifex.com/calamares/calamares/ , or (preferably)
# use ci/txstats.py to automatically check.
#
# When adding a new language, take care that it is properly loaded
# by the translation framework. Languages with alternate scripts
# (sr@latin in particular) may need special handling in CalamaresUtils.cpp.
#
# TODO: drop the es_ES translation from Transifex
# TODO: move eo (Esperanto) to _ok once Qt can actually create a
#       locale for it.
#
# NOTE: when updating the list from Transifex, copy these four lines
#       and prefix each variable name with "p", so that the automatic
#       checks for new languages and misspelled ones are done (that is,
#       copy these four lines to four backup lines, add "p", and then update
#       the original four lines with the current translations).
set( _tx_complete ast ca cs_CZ da de fr hr ja lt pl pt_BR pt_PT
    tr_TR zh_TW )
set( _tx_good bg en_GB es es_MX et gl he hi hu id it_IT ro ru sk sq
    zh_CN )
set( _tx_ok ar el es_PR eu fi_FI is ko mr nb nl sl sr
    sr@latin sv th uk )
set( _tx_bad be eo fa fr_CH gu kk kn lo mk ne_NP ur uz )


### Required versions
#
# See DEPENDENCIES section below.
set( QT_VERSION 5.10.0 )
set( YAMLCPP_VERSION 0.5.1 )
set( ECM_VERSION 5.18 )
set( PYTHONLIBS_VERSION 3.3 )
set( BOOSTPYTHON_VERSION 1.55.0 )


### CMAKE SETUP
#
set( CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/CMakeModules" )

# CMake 3.9, 3.10 compatibility
if( POLICY CMP0071 )
    cmake_policy( SET CMP0071 NEW )
endif()
if(NOT CMAKE_VERSION VERSION_LESS "3.10.0")
    list(APPEND CMAKE_AUTOMOC_MACRO_NAMES
        "K_PLUGIN_FACTORY_WITH_JSON"
        "K_EXPORT_PLASMA_DATAENGINE_WITH_JSON"
        "K_EXPORT_PLASMA_RUNNER"
    )
endif()


### C++ SETUP
#
set( CMAKE_CXX_STANDARD 14 )
set( CMAKE_CXX_STANDARD_REQUIRED ON )
set( CMAKE_C_STANDARD 99 )
set( CMAKE_C_STANDARD_REQUIRED ON )

# Debugging flags
#
# Possible debugging flags are:
#  - DEBUG_TIMEZONES draws latitude and longitude lines on the timezone
#    widget and enables chatty debug logging, for dealing with the timezone
#    location database.
#  - DEBUG_FILESYSTEMS does extra logging and checking when looking at
#    partition configuration. Lists known KPMCore FS types.
#
# The flags listed here are enabled in Debug builds. By default, none
# are **actually** listed, because they're for such specific scenarios.
set( _enable_debug_flags
    # DEBUG_TIMEZONES
    # DEBUG_FILESYSTEMS
)
# Add those flags to the CXX flags in a suitable format.
foreach( _edf ${_enable_debug_flags} )
    string( APPEND CMAKE_CXX_FLAGS_DEBUG " -D${_edf}" )
endforeach()

set( CMAKE_C_FLAGS                  "${CMAKE_C_FLAGS} -Wall" )
if( CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
    message( STATUS "Found Clang ${CMAKE_CXX_COMPILER_VERSION}, setting up Clang-specific compiler flags." )
    set( CMAKE_C_FLAGS                  "${CMAKE_C_FLAGS} -Wall" )
    set( CMAKE_C_FLAGS_DEBUG            "-g" )
    set( CMAKE_C_FLAGS_MINSIZEREL       "-Os -DNDEBUG" )
    set( CMAKE_C_FLAGS_RELEASE          "-O4 -DNDEBUG" )
    set( CMAKE_C_FLAGS_RELWITHDEBINFO   "-O2 -g" )

    # Clang warnings: doing *everything* is counter-productive, since it warns
    # about things which we can't fix (e.g. C++98 incompatibilities, but
    # Calamares is C++14).
    foreach( CLANG_WARNINGS
        -Weverything
        -Wno-c++98-compat
        -Wno-c++98-compat-pedantic
        -Wno-padded
        -Wno-undefined-reinterpret-cast
        -Wno-global-constructors
        -Wno-exit-time-destructors
        -Wno-missing-prototypes
        -Wno-documentation-unknown-command
    )
        string( APPEND CMAKE_CXX_FLAGS " ${CLANG_WARNINGS}" )
    endforeach()

    # Third-party code where we don't care so much about compiler warnings
    # (because it's uncomfortable to patch) get different flags; use
    #       mark_thirdparty_code( <file> [<file>...] )
    # to switch off warnings for those sources.
    set( SUPPRESS_3RDPARTY_WARNINGS "-Wno-everything" )
    set( SUPPRESS_BOOST_WARNINGS " -Wno-zero-as-null-pointer-constant -Wno-disabled-macro-expansion" )

    set( CMAKE_CXX_FLAGS_DEBUG          "-g ${CMAKE_CXX_FLAGS_DEBUG}" )
    set( CMAKE_CXX_FLAGS_MINSIZEREL     "-Os -DNDEBUG" )
    set( CMAKE_CXX_FLAGS_RELEASE        "-O4 -DNDEBUG" )
    set( CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g" )

    set( CMAKE_TOOLCHAIN_PREFIX "llvm-" )

    set( CMAKE_SHARED_LINKER_FLAGS "-Wl,--no-undefined" )
else()
    set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--no-undefined" )
    set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--fatal-warnings -Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type" )

    set( SUPPRESS_3RDPARTY_WARNINGS "" )
    set( SUPPRESS_BOOST_WARNINGS "" )
endif()

# Use mark_thirdparty_code() to reduce warnings from the compiler
# on code that we're not going to fix. Call this with a list of files.
macro(mark_thirdparty_code)
    set_source_files_properties( ${ARGV}
        PROPERTIES
            COMPILE_FLAGS "${SUPPRESS_3RDPARTY_WARNINGS}"
            COMPILE_DEFINITIONS "THIRDPARTY"
    )
endmacro()

if( CMAKE_COMPILER_IS_GNUCXX )
    if( CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.9 OR
        CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 4.9 )
        message( STATUS "Found GNU g++ ${CMAKE_CXX_COMPILER_VERSION}, enabling colorized error messages." )
        set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fdiagnostics-color=auto" )
    endif()
endif()

include( FeatureSummary )
include( CMakeColors )


### DEPENDENCIES
#
find_package( Qt5 ${QT_VERSION} CONFIG REQUIRED Concurrent Core Gui Widgets LinguistTools Svg Quick QuickWidgets )
find_package( YAMLCPP ${YAMLCPP_VERSION} REQUIRED )
if( INSTALL_POLKIT )
    find_package( PolkitQt5-1 REQUIRED )
else()
    # Find it anyway, for dependencies-reporting
    find_package( PolkitQt5-1 )
endif()
set_package_properties(
    PolkitQt5-1 PROPERTIES
    DESCRIPTION "Qt5 support for Polkit"
    URL "https://cgit.kde.org/polkit-qt-1.git"
    PURPOSE "PolkitQt5-1 helps with installing Polkit configuration"
)

# Find ECM once, and add it to the module search path; Calamares
# modules that need ECM can do
#   find_package(ECM ${ECM_VERSION} REQUIRED NO_MODULE),
# no need to mess with the module path after.
find_package(ECM ${ECM_VERSION} NO_MODULE)
if( ECM_FOUND )
    set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${CMAKE_MODULE_PATH})
    if ( BUILD_TESTING )
        # ECM implies that we can build the tests, too
        find_package( Qt5 COMPONENTS Test REQUIRED )
        include( ECMAddTests )
    endif()
endif()

find_package( KF5 COMPONENTS CoreAddons Crash )
if( NOT KF5Crash_FOUND )
    set( WITH_KF5Crash OFF )
endif()

if( BUILD_TESTING )
    enable_testing()
endif ()

find_package( PythonLibs ${PYTHONLIBS_VERSION} )
set_package_properties(
    PythonLibs PROPERTIES
    DESCRIPTION "C interface libraries for the Python 3 interpreter."
    URL "http://python.org"
    PURPOSE "Python 3 is used for Python job modules."
)

if ( PYTHONLIBS_FOUND )
    include( BoostPython3 )
    find_boost_python3( ${BOOSTPYTHON_VERSION} ${PYTHONLIBS_VERSION_STRING} CALAMARES_BOOST_PYTHON3_FOUND )
    set_package_properties(
        Boost PROPERTIES
        PURPOSE "Boost.Python is used for Python job modules."
    )

    find_package( PythonQt )
    set_package_properties( PythonQt PROPERTIES
        DESCRIPTION "A Python embedding solution for Qt applications."
        URL "http://pythonqt.sourceforge.net"
        PURPOSE "PythonQt is used for Python view modules."
    )
endif()

if( NOT PYTHONLIBS_FOUND OR NOT CALAMARES_BOOST_PYTHON3_FOUND )
    message(STATUS "Disabling Boost::Python modules")
    set( WITH_PYTHON OFF )
endif()
if( NOT PYTHONLIBS_FOUND OR NOT PYTHONQT_FOUND )
    message(STATUS "Disabling PythonQt modules")
    set( WITH_PYTHONQT OFF )
endif()

### Transifex Translation status
#
# Construct language lists for use. If there are p_tx* variables,
# then run an extra cmake-time check for consistency of the old
# (p_tx*) and new (_tx*) lists.
#
set( prev_tx ${p_tx_complete} ${p_tx_good} ${p_tx_ok} ${p_tx_bad} )
set( curr_tx ${_tx_complete} ${_tx_good} ${_tx_ok} ${_tx_bad} )
set( tx_errors OFF )
if ( prev_tx )
    # Gone in new list
    foreach( l ${prev_tx} )
        list( FIND curr_tx ${l} p_l )
        if( p_l EQUAL -1 )
            message(WARNING "Language ${l} was present in previous translations and is now absent.")
            set( tx_errors ON )
        endif()
    endforeach()

    # New in list
    foreach( l ${curr_tx} )
        list( FIND prev_tx ${l} p_l )
        if( p_l EQUAL -1 )
            message(WARNING "Language ${l} is new.")
            set( tx_errors ON )
        endif()
        set( p_l "lang/calamares_${l}.ts" )
        if( NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${p_l} )
            message(WARNING "Language ${l} has no .ts file yet.")
            set( tx_errors ON )
        endif()
    endforeach()

    unset( p_l )
    unset( l )
endif()
unset( prev_tx )
unset( curr_tx )
if( tx_errors )
    message( FATAL_ERROR "Translation warnings, see above." )
endif()

set( CALAMARES_TRANSLATION_LANGUAGES en ${_tx_complete} ${_tx_good} ${_tx_ok} )
list( SORT CALAMARES_TRANSLATION_LANGUAGES )

add_subdirectory( lang )  # i18n tools


### Example Distro
#
# For testing purposes Calamares includes a very, very, limited sample
# distro called "Generic". The root filesystem of "Generic" lives in
# data/example-root and can be squashed up as part of the build, so
# that a pure-upstream run of ./calamares -d from the build directory
# (with all the default settings and configurations) can actually
# do an complete example run.
#
# Some binaries from the build host (e.g. /bin and /lib) are also
# squashed into the example filesystem.
#
# To build the example distro (for use by the default, example,
# unsquashfs module), build the target 'example-distro', eg.:
#
#   make example-distro
#
find_program( mksquashfs_PROGRAM mksquashfs )
if( mksquashfs_PROGRAM )
    set( mksquashfs_FOUND ON )
    set( src_fs ${CMAKE_SOURCE_DIR}/data/example-root/ )
    set( dst_fs ${CMAKE_BINARY_DIR}/example.sqfs )
    if( EXISTS ${src_fs} )
        # based on the build host. If /lib64 exists, assume it is needed.
        # Collect directories needed for a minimal binary distro,
        # Note that the last path component is added to the root, so
        # if you add /usr/sbin here, it will be put into /sbin_1.
        # Add such paths to /etc/profile under ${src_fs}.
        set( candidate_fs /sbin /bin /lib /lib64 )
        set( host_fs "" )
        foreach( c_fs ${candidate_fs} )
            if( EXISTS ${c_fs} )
                list( APPEND host_fs ${c_fs} )
            endif()
        endforeach()
        add_custom_command(
            OUTPUT ${dst_fs}
            COMMAND ${mksquashfs_PROGRAM} ${src_fs} ${dst_fs} -all-root
            COMMAND ${mksquashfs_PROGRAM} ${host_fs} ${dst_fs} -all-root
        )
        add_custom_target(example-distro DEPENDS ${dst_fs})
    endif()
else()
    set( mksquashfs_FOUND OFF )
endif()
# Doesn't list mksquashfs as an optional dep, though, because it
# hasn't been sent through the find_package() scheme.
#
# "http://tldp.org/HOWTO/SquashFS-HOWTO/creatingandusing.html"
add_feature_info( ExampleDistro ${mksquashfs_FOUND} "Create example-distro target.")


### CALAMARES PROPER
#
set( CALAMARES_VERSION ${CALAMARES_VERSION_MAJOR}.${CALAMARES_VERSION_MINOR}.${CALAMARES_VERSION_PATCH} )
set( CALAMARES_VERSION_SHORT "${CALAMARES_VERSION}" )
if( CALAMARES_VERSION_RC )
    set( CALAMARES_VERSION ${CALAMARES_VERSION}rc${CALAMARES_VERSION_RC} )
endif()

# additional info for non-release builds
if( NOT BUILD_RELEASE AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git/" )
    include( CMakeDateStamp )
    set( CALAMARES_VERSION_DATE "${CMAKE_DATESTAMP_YEAR}${CMAKE_DATESTAMP_MONTH}${CMAKE_DATESTAMP_DAY}" )
    if( CALAMARES_VERSION_DATE GREATER 0 )
        set( CALAMARES_VERSION ${CALAMARES_VERSION}.${CALAMARES_VERSION_DATE} )
    endif()

    include( CMakeVersionSource )
    if( CMAKE_VERSION_SOURCE )
        set( CALAMARES_VERSION ${CALAMARES_VERSION}-${CMAKE_VERSION_SOURCE} )
    endif()
endif()

# Special target for not-RC (e.g. might-be-release) builds.
# This is used by the release script to get the version.
if ( CALAMARES_VERSION_RC EQUAL 0 )
    add_custom_target(show-version
        ${CMAKE_COMMAND} -E echo CALAMARES_VERSION=${CALAMARES_VERSION_SHORT}
        USES_TERMINAL
    )
endif()

# enforce using constBegin, constEnd for const-iterators
add_definitions( "-DQT_STRICT_ITERATORS" )

# set paths
set( CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}" )
set( CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}" )
set( CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}" )

# Better default installation paths: GNUInstallDirs defines
# CMAKE_INSTALL_FULL_SYSCONFDIR to be CMAKE_INSTALL_PREFIX/etc by default
# but we really want /etc
if( NOT DEFINED CMAKE_INSTALL_SYSCONFDIR )
    set( CMAKE_INSTALL_SYSCONFDIR "/etc" )
endif()

# make predefined install dirs available everywhere
include( GNUInstallDirs )

# make uninstall support
configure_file(
    "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
    "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
    IMMEDIATE @ONLY
)

# Early configure these files as we need them later on
set( CALAMARES_CMAKE_DIR "${CMAKE_SOURCE_DIR}/CMakeModules" )
set( CALAMARES_LIBRARIES calamares )

add_subdirectory( src )

add_feature_info(Python ${WITH_PYTHON} "Python job modules")
add_feature_info(PythonQt ${WITH_PYTHONQT} "Python view modules")
add_feature_info(Config ${INSTALL_CONFIG} "Install Calamares configuration")
add_feature_info(KCrash ${WITH_KF5Crash} "Crash dumps via KCrash")

# Add all targets to the build-tree export set
set( CMAKE_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/cmake/Calamares" CACHE PATH  "Installation directory for CMake files" )
set( CMAKE_INSTALL_FULL_CMAKEDIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_CMAKEDIR}" )
export( TARGETS calamares
    FILE "${PROJECT_BINARY_DIR}/CalamaresLibraryDepends.cmake" )

# Export the package for use from the build-tree
# (this registers the build-tree with a global CMake-registry)
export( PACKAGE Calamares )

# Create a CalamaresBuildTreeSettings.cmake file for the use from the build tree
configure_file( CalamaresBuildTreeSettings.cmake.in "${PROJECT_BINARY_DIR}/CalamaresBuildTreeSettings.cmake" @ONLY )

# Create the CalamaresConfig.cmake and CalamaresConfigVersion files
file( RELATIVE_PATH CONF_REL_INCLUDE_DIR "${CMAKE_INSTALL_FULL_CMAKEDIR}" "${CMAKE_INSTALL_FULL_INCLUDEDIR}" )

configure_file( CalamaresConfig.cmake.in "${PROJECT_BINARY_DIR}/CalamaresConfig.cmake" @ONLY )
configure_file( CalamaresConfigVersion.cmake.in "${PROJECT_BINARY_DIR}/CalamaresConfigVersion.cmake" @ONLY )
configure_file( CalamaresUse.cmake.in "${PROJECT_BINARY_DIR}/CalamaresUse.cmake" @ONLY )

# Install the cmake files
install(
    FILES
        "${PROJECT_BINARY_DIR}/CalamaresConfig.cmake"
        "${PROJECT_BINARY_DIR}/CalamaresConfigVersion.cmake"
        "${PROJECT_BINARY_DIR}/CalamaresUse.cmake"
        "CMakeModules/CalamaresAddPlugin.cmake"
        "CMakeModules/CalamaresAddModuleSubdirectory.cmake"
        "CMakeModules/CalamaresAddLibrary.cmake"
        "CMakeModules/CalamaresAddBrandingSubdirectory.cmake"
        "CMakeModules/CalamaresAddTranslations.cmake"
        "CMakeModules/CMakeColors.cmake"
    DESTINATION
        "${CMAKE_INSTALL_CMAKEDIR}"
)

# Install the export set for use with the install-tree
install(
    EXPORT
        CalamaresLibraryDepends
    DESTINATION
        "${CMAKE_INSTALL_CMAKEDIR}"
)

if( INSTALL_CONFIG )
    install(
        FILES
            settings.conf
        DESTINATION
            share/calamares
    )
endif()

if( INSTALL_POLKIT )
    install(
        FILES
            com.github.calamares.calamares.policy
        DESTINATION
          "${POLKITQT-1_POLICY_FILES_INSTALL_DIR}"
    )
endif()

install(
  FILES
      calamares.desktop
  DESTINATION
      ${CMAKE_INSTALL_DATADIR}/applications
)

install(
    FILES
        man/calamares.8
    DESTINATION
        ${CMAKE_INSTALL_MANDIR}/man8/
)

# uninstall target
configure_file(
    "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
    "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
    IMMEDIATE @ONLY
)

add_custom_target( uninstall
    COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake
)

### CMAKE SUMMARY REPORT
#
feature_summary(WHAT ALL)

get_directory_property( SKIPPED_MODULES
    DIRECTORY src/modules
    DEFINITION LIST_SKIPPED_MODULES
)
calamares_explain_skipped_modules( ${SKIPPED_MODULES} )