CMakeLists.txt

cmake_minimum_required(VERSION 3.20)
project(Clew VERSION 0.7.0 LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 23)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# ============================================================
# Version: derived from `git describe --tags --always --dirty`.
# Examples:
#   Clean release tag:    v0.7.1       -> 0.7.1
#   Commits past a tag:   v0.7.1-3-gab -> 0.7.1-3-gab
#   Dirty working tree:   ...dirty     -> ...dirty
#   No git / no tag:      fallback     -> 0.7.0-unknown
# Re-run `cmake --preset ...` after tagging or switching branches to refresh.
# ============================================================
find_package(Git QUIET)
set(CLEW_VERSION_RAW "")
if(Git_FOUND AND EXISTS "${CMAKE_SOURCE_DIR}/.git")
    execute_process(
        COMMAND ${GIT_EXECUTABLE} describe --tags --always --dirty
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
        OUTPUT_VARIABLE CLEW_VERSION_RAW
        OUTPUT_STRIP_TRAILING_WHITESPACE
        ERROR_QUIET
    )
endif()
if(NOT CLEW_VERSION_RAW)
    set(CLEW_VERSION_RAW "${PROJECT_VERSION}-unknown")
endif()
# Strip leading "v" so "v0.7.1" becomes "0.7.1"
string(REGEX REPLACE "^v" "" CLEW_VERSION "${CLEW_VERSION_RAW}")
message(STATUS "Clew version (from git): ${CLEW_VERSION}")

# Generate C++ header and frontend TS constant.
file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/generated/core")
file(WRITE "${CMAKE_BINARY_DIR}/generated/core/version.hpp"
"// Auto-generated by CMake from git describe. Do not edit.\n"
"#pragma once\n"
"#define CLEW_VERSION \"${CLEW_VERSION}\"\n"
)
file(WRITE "${CMAKE_SOURCE_DIR}/frontend/src/version.ts"
"// Auto-generated by CMake from git describe. Do not edit.\n"
"export const CLEW_VERSION = '${CLEW_VERSION}'\n"
)

# Windows-specific settings
if(WIN32)
    add_definitions(-DWIN32_LEAN_AND_MEAN -DNOMINMAX -D_WIN32_WINNT=0x0A00)
endif()

# MSVC-specific settings
if(MSVC)
    add_compile_options(/utf-8)
endif()

# Option to enable WebView2 GUI support
option(CLEW_ENABLE_WEBVIEW2 "Enable WebView2 GUI support" OFF)

# Optional 100ms refresh-coalesce window in process_projection.
# Default OFF — the strand cost of refresh-per-event at typical loads
# (a few hundred to a few thousand processes, low ETW churn) is
# negligible, and instant pushes feel snappier. Enable only if you
# have a real workload where ETW bursts (e.g. parallel build kicks
# off thousands of children at once) saturate the strand.
option(CLEW_PROJECTION_COALESCE "Enable projection coalesce window (100ms)" OFF)

# ============================================================
# Dependencies (vcpkg)
# ============================================================
find_package(quill CONFIG REQUIRED)
find_package(nlohmann_json CONFIG REQUIRED)
find_package(httplib CONFIG REQUIRED)
find_package(asio CONFIG REQUIRED)

# ============================================================
# Clew main executable
# ============================================================

# Include directories
include_directories(
    ${CMAKE_SOURCE_DIR}/src
    ${CMAKE_BINARY_DIR}/generated
    ${CMAKE_SOURCE_DIR}/WinDivert-2.2.2-A/include
)

# Link directories
link_directories(
    ${CMAKE_SOURCE_DIR}/WinDivert-2.2.2-A/x64
)

# Source files. Historically header-only, but the three-layer refactor
# (see refactor_docs/DESIGN.md) progressively introduces hpp/cpp-split
# translation units. The legacy http_api_server.cpp remains until Stage 4
# retires it in favour of src/transport/*.
set(CLEW_SOURCES
    src/main.cpp
    src/app.cpp
    src/common/api_exception.cpp
    src/config/config_store.cpp
    src/domain/process_tree_manager.cpp
    src/services/autostart_service.cpp
    src/services/config_service.cpp
    src/services/connection_service.cpp
    src/services/group_service.cpp
    src/services/icon_service.cpp
    src/services/process_tree_service.cpp
    src/services/rule_service.cpp
    src/services/shell_service.cpp
    src/services/stats_service.cpp
    src/projection/process_projection.cpp
    src/projection/config_sse_bridge.cpp
    src/transport/response_utils.cpp
    src/transport/middleware.cpp
    src/transport/route_registry.cpp
    src/transport/http_api_server.cpp
    src/transport/handlers/autostart_handlers.cpp
    src/transport/handlers/config_handlers.cpp
    src/transport/handlers/connection_handlers.cpp
    src/transport/handlers/group_handlers.cpp
    src/transport/handlers/icon_handlers.cpp
    src/transport/handlers/process_handlers.cpp
    src/transport/handlers/rule_handlers.cpp
    src/transport/handlers/shell_handlers.cpp
    src/transport/handlers/stats_handlers.cpp
)

# Embed the Clew icon via a Win32 resource file.
if(WIN32)
    list(APPEND CLEW_SOURCES ${CMAKE_SOURCE_DIR}/assets/clew.rc)
endif()

# Executable
if(CLEW_ENABLE_WEBVIEW2)
    add_executable(clew WIN32 ${CLEW_SOURCES})
    target_compile_definitions(clew PRIVATE CLEW_HAS_WEBVIEW2)
else()
    add_executable(clew ${CLEW_SOURCES})
endif()

if(CLEW_PROJECTION_COALESCE)
    target_compile_definitions(clew PRIVATE CLEW_PROJECTION_COALESCE)
    message(STATUS "CLEW_PROJECTION_COALESCE=ON — projection arms a 100ms refresh-coalesce timer for batched events")
endif()

# UAC elevation: embed manifest requesting administrator privileges
# (WinDivert and SetInterfaceDnsSettings both require elevation)
if(MSVC)
    target_link_options(clew PRIVATE
        "/MANIFESTUAC:level='requireAdministrator' uiAccess='false'")

    # Parallel compilation: the Visual Studio generator parallelizes across
    # projects by default but serializes .cpp files inside a single project.
    # /MP tells cl.exe to span all cores for this target's TUs (~30 after
    # the three-layer refactor). No-op on Ninja / MSBuild batch mode.
    target_compile_options(clew PRIVATE /MP)
endif()

# Base libraries
set(CLEW_LIBRARIES
    ws2_32
    iphlpapi
    WinDivert
    quill::quill
    nlohmann_json::nlohmann_json
    httplib::httplib
    asio::asio
)

# WebView2 configuration
if(CLEW_ENABLE_WEBVIEW2)
    set(WEBVIEW2_PATH "${CMAKE_SOURCE_DIR}/src/ui/third_party/WebView2" CACHE PATH "Path to WebView2 SDK")

    if(EXISTS "${WEBVIEW2_PATH}/build/native/include/WebView2.h")
        message(STATUS "Found WebView2 SDK at ${WEBVIEW2_PATH}")
        include_directories("${WEBVIEW2_PATH}/build/native/include")

        if(CMAKE_SIZEOF_VOID_P EQUAL 8)
            set(WEBVIEW2_ARCH "x64")
        else()
            set(WEBVIEW2_ARCH "x86")
        endif()

        if(EXISTS "${WEBVIEW2_PATH}/build/native/${WEBVIEW2_ARCH}/WebView2LoaderStatic.lib")
            list(APPEND CLEW_LIBRARIES
                "${WEBVIEW2_PATH}/build/native/${WEBVIEW2_ARCH}/WebView2LoaderStatic.lib"
            )
            message(STATUS "Using WebView2LoaderStatic.lib")
        elseif(EXISTS "${WEBVIEW2_PATH}/build/native/${WEBVIEW2_ARCH}/WebView2Loader.dll.lib")
            list(APPEND CLEW_LIBRARIES
                "${WEBVIEW2_PATH}/build/native/${WEBVIEW2_ARCH}/WebView2Loader.dll.lib"
            )
            add_custom_command(TARGET clew POST_BUILD
                COMMAND ${CMAKE_COMMAND} -E copy_if_different
                "${WEBVIEW2_PATH}/build/native/${WEBVIEW2_ARCH}/WebView2Loader.dll"
                "$<TARGET_FILE_DIR:clew>"
            )
            message(STATUS "Using WebView2Loader.dll")
        else()
            message(WARNING "WebView2Loader library not found")
        endif()
    else()
        message(WARNING "WebView2 SDK not found at ${WEBVIEW2_PATH}")
    endif()
endif()

# Link libraries
target_link_libraries(clew ${CLEW_LIBRARIES})

# Copy WinDivert DLL to output directory
add_custom_command(TARGET clew POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
    "${CMAKE_SOURCE_DIR}/WinDivert-2.2.2-A/x64/WinDivert.dll"
    "$<TARGET_FILE_DIR:clew>"
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
    "${CMAKE_SOURCE_DIR}/WinDivert-2.2.2-A/x64/WinDivert64.sys"
    "$<TARGET_FILE_DIR:clew>"
)