workspace('rive')

newoption({
    trigger = 'config',
    description = 'one-and-only config (for multiple configs, target a new --out directory)',
    allowed = { { 'debug' }, { 'release' }, { nil } },
    default = nil,
})
newoption({ trigger = 'release', description = 'shortcut for \'--config=release\'' })
if _OPTIONS['release'] then
    if _OPTIONS['config'] then
        error('use either \'--release\' or \'--config=release/debug\' (not both)')
    end
    _OPTIONS['config'] = 'release'
    _OPTIONS['release'] = nil
elseif not _OPTIONS['config'] then
    _OPTIONS['config'] = 'debug'
end
RIVE_BUILD_CONFIG = _OPTIONS['config']

newoption({
    trigger = 'out',
    description = 'Directory to generate build files',
    default = nil,
})
RIVE_BUILD_OUT = _OPTIONS['out'] or ('out/' .. RIVE_BUILD_CONFIG)

newoption({
    trigger = 'toolset',
    value = 'type',
    description = 'Choose which toolchain to build with',
    allowed = {
        { 'clang', 'Build with Clang' },
        { 'msc', 'Build with the Microsoft C/C++ compiler' },
    },
    default = 'clang',
})

newoption({
    trigger = 'arch',
    value = 'ABI',
    description = 'The ABI with the right toolchain for this build, generally with Android',
    allowed = {
        { 'host' },
        { 'x86' },
        { 'x64' },
        { 'arm' },
        { 'arm64' },
        { 'universal', '"fat" library on apple platforms' },
        { 'wasm', 'emscripten targeting web assembly' },
        { 'js', 'emscripten targeting javascript' },
    },
    default = 'host',
})

newoption({
    trigger = 'variant',
    value = 'type',
    description = 'Choose a particular variant to build',
    allowed = {
        { 'system', 'Builds the static library for the provided system' },
        { 'emulator', 'Builds for a simulator for the provided system' },
    },
    default = 'system',
})

newoption({
    trigger = 'with-rtti',
    description = 'don\'t disable rtti (nonstandard for Rive)',
})

newoption({
    trigger = 'with-exceptions',
    description = 'don\'t disable exceptions (nonstandard for Rive)',
})

newoption({
    trigger = 'no-wasm-simd',
    description = 'disable simd for wasm builds',
})

newoption({
    trigger = 'wasm_single',
    description = 'Embed wasm directly into the js, instead of side-loading it.',
})

newoption({
    trigger = 'no-lto',
    description = 'Don\'t build with link time optimizations.',
})

location(_WORKING_DIR .. '/' .. RIVE_BUILD_OUT)
targetdir(_WORKING_DIR .. '/' .. RIVE_BUILD_OUT)
objdir(_WORKING_DIR .. '/' .. RIVE_BUILD_OUT .. '/obj')
toolset(_OPTIONS['toolset'] or 'clang')
language('C++')
cppdialect('C++17')
configurations({ 'default' })
filter({ 'options:not with-rtti' })
rtti('Off')
filter({ 'options:with-rtti' })
rtti('On')
filter({ 'options:not with-exceptions' })
exceptionhandling('Off')
filter({ 'options:with-exceptions' })
exceptionhandling('On')

filter('options:config=debug')
do
    defines({ 'DEBUG' })
    symbols('On')
end

filter('options:config=release')
do
    defines({ 'RELEASE' })
    defines({ 'NDEBUG' })
    optimize('On')
end

filter({ 'options:config=release', 'options:not no-lto', 'system:not macosx', 'system:not ios' })
do
    flags({ 'LinkTimeOptimization' })
end

filter({ 'options:config=release', 'options:not no-lto', 'system:macosx or ios' })
do
    -- The 'LinkTimeOptimization' flag attempts to use llvm-ar, which doesn't always exist on macos.
    buildoptions({ '-flto=full' })
    linkoptions({ '-flto=full' })
end

filter('system:windows')
do
    staticruntime('on') -- Match Skia's /MT flag for link compatibility
    runtime('Release') -- Use /MT even in debug (/MTd is incompatible with Skia)
    architecture('x64')
    defines({ '_USE_MATH_DEFINES', 'NOMINMAX' })
end

filter({ 'system:windows', 'options:toolset=clang' })
do
    buildoptions({
        '-Wno-c++98-compat',
        '-Wno-c++20-compat',
        '-Wno-c++98-compat-pedantic',
        '-Wno-c99-extensions',
        '-Wno-ctad-maybe-unsupported',
        '-Wno-deprecated-copy-with-user-provided-dtor',
        '-Wno-deprecated-declarations',
        '-Wno-documentation',
        '-Wno-documentation-pedantic',
        '-Wno-documentation-unknown-command',
        '-Wno-double-promotion',
        '-Wno-exit-time-destructors',
        '-Wno-float-equal',
        '-Wno-global-constructors',
        '-Wno-implicit-float-conversion',
        '-Wno-newline-eof',
        '-Wno-old-style-cast',
        '-Wno-reserved-identifier',
        '-Wno-shadow',
        '-Wno-sign-compare',
        '-Wno-sign-conversion',
        '-Wno-unused-macros',
        '-Wno-unused-parameter',
        '-Wno-four-char-constants',
        '-Wno-unreachable-code',
        '-Wno-switch-enum',
        '-Wno-missing-field-initializers',
        '-Wno-unsafe-buffer-usage',
    })
end

filter({ 'system:windows', 'options:toolset=msc' })
do
    defines({ '_CRT_SECURE_NO_WARNINGS' })

    -- We currently suppress several warnings for the MSVC build, some serious. Once this build
    -- is fully integrated into GitHub actions, we will definitely want to address these.
    disablewarnings({
        '4061', -- enumerator 'identifier' in switch of enum 'enumeration' is not explicitly
        -- handled by a case label
        '4100', -- 'identifier': unreferenced formal parameter
        '4201', -- nonstandard extension used: nameless struct/union
        '4244', -- 'conversion_type': conversion from 'type1' to 'type2', possible loss of data
        '4245', -- 'conversion_type': conversion from 'type1' to 'type2', signed/unsigned
        --  mismatch
        '4267', -- 'variable': conversion from 'size_t' to 'type', possible loss of data
        '4355', -- 'this': used in base member initializer list
        '4365', -- 'expression': conversion from 'type1' to 'type2', signed/unsigned mismatch
        '4388', -- 'expression': signed/unsigned mismatch
        '4389', -- 'operator': signed/unsigned mismatch
        '4458', -- declaration of 'identifier' hides class member
        '4514', -- 'function': unreferenced inline function has been removed
        '4583', -- 'Catch::clara::detail::ResultValueBase<T>::m_value': destructor is not
        -- implicitly called
        '4623', -- 'Catch::AssertionInfo': default constructor was implicitly defined as deleted
        '4625', -- 'derived class': copy constructor was implicitly defined as deleted because a
        -- base class copy constructor is inaccessible or deleted
        '4626', -- 'derived class': assignment operator was implicitly defined as deleted
        --  because a base class assignment operator is inaccessible or deleted
        '4820', -- 'bytes' bytes padding added after construct 'member_name'
        '4868', -- (catch.hpp) compiler may not enforce left-to-right evaluation order in braced
        -- initializer list
        '5026', -- 'type': move constructor was implicitly defined as deleted
        '5027', -- 'type': move assignment operator was implicitly defined as deleted
        '5039', -- (catch.hpp) 'AddVectoredExceptionHandler': pointer or reference to
        -- potentially throwing function passed to 'extern "C"' function under -EHc.
        -- Undefined behavior may occur if this function throws an exception.
        '5045', -- Compiler will insert Spectre mitigation for memory load if /Qspectre switch
        -- specified
        '5204', -- 'Catch::Matchers::Impl::MatcherMethod<T>': class has virtual functions, but
        -- its trivial destructor is not virtual; instances of objects derived from this
        -- class may not be destructed correctly
        '5219', -- implicit conversion from 'type-1' to 'type-2', possible loss of data
        '5262', -- MSVC\14.34.31933\include\atomic(917,9): implicit fall-through occurs here;
        -- are you missing a break statement?
        '5264', -- 'rive::math::PI': 'const' variable is not used
        '4647', -- behavior change: __is_pod(rive::Vec2D) has different value in previous versions
    })
end

filter({})

-- Don't use filter() here because we don't want to generate the "android_ndk" toolset if not
-- building for android.
if _OPTIONS['os'] == 'android' then
    pic('on') -- Position-independent code is required for NDK libraries.

    local ndk = os.getenv('NDK_PATH')
    if not ndk or ndk == '' then
        error('export $NDK_PATH')
    end

    local ndk_toolchain = ndk .. '/toolchains/llvm/prebuilt'
    if os.host() == 'windows' then
        ndk_toolchain = ndk_toolchain .. '/windows-x86_64'
    elseif os.host() == 'macosx' then
        ndk_toolchain = ndk_toolchain .. '/darwin-x86_64'
    else
        ndk_toolchain = ndk_toolchain .. '/linux-x86_64'
    end

    -- clone the clang toolset into a custom one called "android_ndk".
    premake.tools.android_ndk = {}
    for k, v in pairs(premake.tools.clang) do
        premake.tools.android_ndk[k] = v
    end

    -- update the android_ndk toolset to use the appropriate binaries.
    local android_ndk_tools = {
        cc = ndk_toolchain .. '/bin/clang',
        cxx = ndk_toolchain .. '/bin/clang++',
        ar = ndk_toolchain .. '/bin/llvm-ar',
    }
    function premake.tools.android_ndk.gettoolname(cfg, tool)
        return android_ndk_tools[tool]
    end

    toolset('android_ndk')

    buildoptions({
        '--sysroot=' .. ndk_toolchain .. '/sysroot',
        '-fdata-sections',
        '-ffunction-sections',
        '-funwind-tables',
        '-fstack-protector-strong',
        '-no-canonical-prefixes',
    })

    linkoptions({
        '--sysroot=' .. ndk_toolchain .. '/sysroot',
        '-fdata-sections',
        '-ffunction-sections',
        '-funwind-tables',
        '-fstack-protector-strong',
        '-no-canonical-prefixes',
        '-Wl,--fatal-warnings',
        '-Wl,--gc-sections',
        '-Wl,--no-rosegment',
        '-Wl,--no-undefined',
        '-static-libstdc++',
    })

    filter('options:arch=x86')
    do
        architecture('x86')
        buildoptions({ '--target=i686-none-linux-android21' })
        linkoptions({ '--target=i686-none-linux-android21' })
    end
    filter('options:arch=x64')
    do
        architecture('x64')
        buildoptions({ '--target=x86_64-none-linux-android21' })
        linkoptions({ '--target=x86_64-none-linux-android21' })
    end
    filter('options:arch=arm')
    do
        architecture('arm')
        buildoptions({ '--target=armv7a-none-linux-android21' })
        linkoptions({ '--target=armv7a-none-linux-android21' })
    end
    filter('options:arch=arm64')
    do
        architecture('arm64')
        buildoptions({ '--target=aarch64-none-linux-android21' })
        linkoptions({ '--target=aarch64-none-linux-android21' })
    end

    filter({})
end

if os.host() == 'macosx' then
    iphoneos_sysroot = os.outputof('xcrun --sdk iphoneos --show-sdk-path')
    iphonesimulator_sysroot = os.outputof('xcrun --sdk iphonesimulator --show-sdk-path')

    filter('system:ios')
    do
        buildoptions({ '-fembed-bitcode ' })
    end

    filter({ 'system:ios', 'options:variant=system' })
    do
        buildoptions({
            '--target=arm64-apple-ios13.0.0',
            '-mios-version-min=13.0.0',
            '-isysroot ' .. iphoneos_sysroot,
        })
    end

    filter({ 'system:ios', 'options:variant=emulator' })
    do
        buildoptions({
            '--target=arm64-apple-ios13.0.0-simulator',
            '-mios-version-min=13.0.0',
            '-isysroot ' .. iphonesimulator_sysroot,
        })
    end

    filter('system:macosx or system:ios')
    do
        buildoptions({ '-fobjc-arc' })
    end

    filter({ 'system:macosx', 'options:arch=arm64 or arch=universal' })
    do
        buildoptions({ '-arch arm64' })
        linkoptions({ '-arch arm64' })
    end

    filter({ 'system:macosx', 'options:arch=x64 or arch=universal' })
    do
        buildoptions({ '-arch x86_64' })
        linkoptions({ '-arch x86_64' })
    end

    filter({
        'system:ios',
        'options:variant=system',
        'options:arch=arm64 or arch=universal',
    })
    do
        buildoptions({ '-arch arm64' })
    end

    filter({
        'system:ios',
        'options:variant=emulator',
        'options:arch=x64 or arch=universal',
    })
    do
        buildoptions({ '-arch x86_64' })
    end

    filter({
        'system:ios',
        'options:variant=emulator',
        'options:arch=arm64 or arch=universal',
    })
    do
        buildoptions({ '-arch arm64' })
    end

    filter({})
end

if _OPTIONS['arch'] == 'wasm' or _OPTIONS['arch'] == 'js' then
    -- make a new system called "emscripten" so we don't try including host-os-specific files in the
    -- web build.
    premake.api.addAllowed('system', 'emscripten')

    -- clone the clang toolset into a custom one called "emsdk".
    premake.tools.emsdk = {}
    for k, v in pairs(premake.tools.clang) do
        premake.tools.emsdk[k] = v
    end

    -- update the emsdk toolset to use the appropriate binaries.
    local emsdk_tools = {
        cc = 'emcc',
        cxx = 'em++',
        ar = 'emar',
    }
    function premake.tools.emsdk.gettoolname(cfg, tool)
        return emsdk_tools[tool]
    end

    system('emscripten')
    toolset('emsdk')

    linkoptions({ '-sALLOW_MEMORY_GROWTH=1', '-sDYNAMIC_EXECUTION=0' })

    filter('options:arch=wasm')
    do
        linkoptions({ '-sWASM=1' })
    end

    filter({ 'options:arch=wasm', 'options:not no-wasm-simd' })
    do
        buildoptions({ '-msimd128' })
    end

    filter({ 'options:arch=wasm', 'options:config=debug' })
    do
        buildoptions({
            '-fsanitize=address',
            '-g2',
        })
        linkoptions({
            '-fsanitize=address',
            '-g2',
        })
    end

    filter('options:arch=js')
    do
        linkoptions({ '-sWASM=0' })
    end

    filter('options:wasm_single')
    do
        linkoptions({ '-sSINGLE_FILE=1' })
    end

    filter('options:config=release')
    do
        buildoptions({ '-Oz' })
    end

    filter({})
end

filter({})