First attempt

2026-05-08 17:48:16 +02:00
commit 5e77dc836b
36 changed files with 4806 additions and 0 deletions
@@ -0,0 +1,71 @@
+cmake_minimum_required(VERSION 3.21)
+project(kpnpp VERSION 0.1.0 LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+option(KPN_BUILD_TESTS    "Build tests"                              ON)
+option(KPN_BUILD_PYTHON   "Build Python bindings (requires nanobind)" ON)
+option(KPN_BUILD_EXAMPLES "Build examples"                            ON)
+option(KPN_WEB_DEBUG      "Enable web debug UI (cpp-httplib)"         OFF)
+
+# ── Core library (header-only) ────────────────────────────────────────────────
+add_library(kpn INTERFACE)
+target_include_directories(kpn INTERFACE
+    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
+    $<INSTALL_INTERFACE:include>
+)
+target_compile_features(kpn INTERFACE cxx_std_20)
+
+# Threads required by node/channel implementation
+find_package(Threads REQUIRED)
+target_link_libraries(kpn INTERFACE Threads::Threads)
+
+# ── Web debug UI (optional) ───────────────────────────────────────────────────
+if(KPN_WEB_DEBUG)
+    include(FetchContent)
+    FetchContent_Declare(
+        cpp-httplib
+        GIT_REPOSITORY https://github.com/yhirose/cpp-httplib.git
+        GIT_TAG        v0.18.0
+    )
+    FetchContent_MakeAvailable(cpp-httplib)
+    # httplib made available but NOT forced onto kpn interface — targets opt in
+    # by defining KPN_WEB_DEBUG=1 and linking httplib::httplib themselves.
+    # This prevents tests and other examples from pulling in the HTTP server.
+endif()
+
+# Convenience function for targets that want web debug
+function(kpn_target_enable_web_debug target)
+    target_compile_definitions(${target} PRIVATE KPN_WEB_DEBUG=1)
+    target_link_libraries(${target} PRIVATE httplib::httplib)
+endfunction()
+
+# ── Tests ─────────────────────────────────────────────────────────────────────
+if(KPN_BUILD_TESTS)
+    enable_testing()
+    add_subdirectory(tests)
+endif()
+
+# ── Python bindings ───────────────────────────────────────────────────────────
+if(KPN_BUILD_PYTHON)
+    find_package(Python 3.8 COMPONENTS Interpreter Development.Module REQUIRED)
+    find_package(nanobind CONFIG QUIET)
+    if(NOT nanobind_FOUND)
+        # Fall back to FetchContent if nanobind not installed system-wide
+        include(FetchContent)
+        FetchContent_Declare(
+            nanobind
+            GIT_REPOSITORY https://github.com/wjakob/nanobind.git
+            GIT_TAG        v2.12.0
+        )
+        FetchContent_MakeAvailable(nanobind)
+    endif()
+    add_subdirectory(python)
+endif()
+
+# ── Examples ──────────────────────────────────────────────────────────────────
+if(KPN_BUILD_EXAMPLES)
+    add_subdirectory(examples)
+endif()