Remove interface libraries

CMakeLists.txt

@@ -173,16 +173,8 @@ option(GRIDDYN_ENABLE_FMI_EXPORT "Enable construction of a binary fmi shared lib
        OFF
 )
 
-option(GRIDDYN_BUILD_PYTHON_INTERFACE "Build Python extension" OFF)
-
 option(GRIDDYN_BUILD_PYTHON_LIBRARY "Build nanobind Python library" OFF)
 
-option(GRIDDYN_BUILD_MATLAB_INTERFACE "Build Matlab Extension" OFF)
-
-option(GRIDDYN_BUILD_OCTAVE_INTERFACE "Build Octave extension (very experimental)" OFF)
-
-option(GRIDDYN_BUILD_JAVA_INTERFACE "Build Java extension" OFF)
-
 option(GRIDDYN_ENABLE_CODE_COVERAGE_TEST "Build a target for testing code coverage" OFF)
 
 set(GRIDDYN_ENABLE_OPENMP AUTO CACHE STRING "Enable OpenMP support")
@@ -266,40 +258,15 @@ if(NOT DEFINED BUILD_SHARED_LIBS)
 endif()
 
 if(BUILD_SHARED_LIBS)
-    set(GRIDDYN_BUILD_C_SHARED_LIBRARY ON)
     set(GRIDDYN_BUILD_CXX_SHARED_LIBRARY ON)
     set(old_build_shared ON)
     # we need this to prevent submodules from building shared libs
     set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
 else()
-    option(GRIDDYN_BUILD_C_SHARED_LIBRARY OFF
-           "Enable construction of GridDyn binary C based shared library"
-    )
     option(GRIDDYN_BUILD_CXX_SHARED_LIBRARY OFF "Build the GridDyn C++ shared library")
 endif()
 
-if(GRIDDYN_BUILD_PYTHON_INTERFACE
-   OR GRIDDYN_BUILD_MATLAB_INTERFACE
-   OR GRIDDYN_BUILD_JAVA_INTERFACE
-   OR GRIDDYN_BUILD_OCTAVE_INTERFACE
-)
-    set(INTERFACE_BUILD ON)
-    hide_variable(BUILD_GRIDDYN_C_SHARED_LIBRARY)
-    show_variable(
-        DISABLE_SWIG BOOL "Disable the use of swig to generate interface code and use repo code"
-        OFF
-    )
-else()
-    set(INTERFACE_BUILD OFF)
-    hide_variable(DISABLE_SWIG)
-endif()
-
-if(INTERFACE_BUILD
-   OR GRIDDYN_BUILD_CXX_SHARED_LIBRARY
-   OR GRIDDYN_BUILD_C_SHARED_LIBRARY
-   OR GRIDDYN_ENABLE_FMI_EXPORT
-   OR GRIDDYN_BUILD_PYTHON_LIBRARY
-)
+if(GRIDDYN_BUILD_CXX_SHARED_LIBRARY OR GRIDDYN_ENABLE_FMI_EXPORT OR GRIDDYN_BUILD_PYTHON_LIBRARY)
     set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 endif()
 
@@ -735,9 +702,6 @@ endif(GRIDDYN_ENABLE_CLANG_TOOLS)
 if(GRIDDYN_BUILD_TESTS AND BUILD_TESTING)
     # message(STATUS "otcf:${optional_component_test_files}")
     add_subdirectory(test)
-    if(GRIDDYN_BUILD_C_SHARED_LIBRARY)
-        add_subdirectory(test/testSharedLibrary)
-    endif()
     enable_testing()
     # add_test(NAME gridDynTest COMMAND testCore)
 endif()
@@ -783,20 +747,6 @@ if(GRIDDYN_BUILD_TESTS AND BUILD_TESTING)
     )
     set_property(TEST Example179BusDynamicTest PROPERTY LABELS Quick Continuous Nightly)
 
-    if(GRIDDYN_BUILD_C_SHARED_LIBRARY)
-        add_test(NAME testSharedLibrary COMMAND shared_library_tests)
-        set_property(TEST testSharedLibrary PROPERTY LABELS Nightly Release)
-
-        add_test(NAME testSharedLibraryQuick COMMAND shared_library_tests --run_test=@quick)
-        set_property(TEST testSharedLibraryQuick PROPERTY LABELS Quick Continuous Valgrind)
-    endif()
-endif()
-
-# ------------------------------------------------------------
-# swig interface builds
-# ------------------------------------------------------------
-if(INTERFACE_BUILD)
-    add_subdirectory(interfaces)
 endif()
 
 if(GRIDDYN_BUILD_PYTHON_LIBRARY)

config/cmake/addlibSuiteSparse.cmake

@@ -54,8 +54,7 @@ else()
     set(klu_primary_target klu)
 endif()
 
-if(${PROJECT_NAME}_BUILD_CXX_SHARED_LIB OR NOT ${PROJECT_NAME}_DISABLE_C_SHARED_LIB)
-
+if(${PROJECT_NAME}_BUILD_CXX_SHARED_LIBRARY)
     if(NOT ${PROJECT_NAME}_USE_SUITESPARSE_STATIC_LIBRARY)
         set_target_properties(${klu_primary_target} PROPERTIES PUBLIC_HEADER "")
         #[[ if(NOT CMAKE_VERSION VERSION_LESS "3.13")
@@ -98,5 +97,4 @@ if(${PROJECT_NAME}_BUILD_CXX_SHARED_LIB OR NOT ${PROJECT_NAME}_DISABLE_C_SHARED_
         endif()
 ]]
     endif()
-
 endif()

config/cmake/addlibzmq.cmake

@@ -117,8 +117,7 @@ else()
     set(zmq_target_output "libzmq")
 endif()
 
-if(${PROJECT_NAME}_BUILD_CXX_SHARED_LIB OR NOT ${PROJECT_NAME}_DISABLE_C_SHARED_LIB)
-
+if(${PROJECT_NAME}_BUILD_CXX_SHARED_LIBRARY)
     if(NOT ${PROJECT_NAME}_USE_ZMQ_STATIC_LIBRARY AND NOT ${PROJECT_NAME}_SKIP_ZMQ_INSTALL)
         set_target_properties(${zmq_target_output} PROPERTIES PUBLIC_HEADER "")
         install(
@@ -143,5 +142,4 @@ if(${PROJECT_NAME}_BUILD_CXX_SHARED_LIB OR NOT ${PROJECT_NAME}_DISABLE_C_SHARED_
         endif()
 
     endif()
-
 endif()

docs/installation.md

@@ -48,11 +48,8 @@ GridDyn uses C++11 extensively and will make use of some C++14 features in the n
 - **ENABLE_TESTS** enable building of the testSuites
 - **ENABLE_MULTITHREADING** not used at preset but will eventually enable threaded execution in some models
 - **ENABLE_EXTRA_COMPILER_WARNINGS** enable more compiler warnings (full list in config/cmake/compiler_flags.cmake)
-- **BUILD_PYTHON_INTERFACE** enable the python swig interface
-- **BUILD_MATLAB_INTERFACE** enable the matlab swig interface
-- **BUILD_OCTAVE_INTERFACE** enable the octave swig interface
-- **BUILD_JAVA_INTERFACE** enable the java swig interface
-- **BUILD_CXX_SHARED_LIB** build `libgriddyn_shared_lib.so`, the c++ interface
+- **GRIDDYN_BUILD_PYTHON_LIBRARY** build the nanobind Python package
+- **GRIDDYN_BUILD_CXX_SHARED_LIBRARY** build the GridDyn C++ shared library
 - **ENABLE_CODE_COVERAGE_TEST** enable code coverage tools
 - **ENABLE_PLUGINS** build libpluginLibrary
 - **ENABLE_EXTRA_SOLVERS** enable additional solvers (including braid, paradae)

docs/python-nanobind-migration-plan.md

@@ -6,10 +6,10 @@ simulation API. It is intended to stay current as the work progresses.
 
 ## Summary
 
-GridDyn currently exposes Python through SWIG wrappers over the C API in
-`interfaces/python`. The new direction is to build a Pythonic interface with
+GridDyn previously exposed Python through SWIG wrappers over the C API in
+`interfaces/python`. The replacement is a Pythonic interface built with
 nanobind that calls GridDyn C++ directly. The C API and SWIG-generated wrappers
-should not be part of the new Python implementation.
+are no longer part of the maintained Python implementation.
 
 The first milestone is deliberately narrow: expose the simulation object and the
 minimum surface needed to load, initialize, solve, and run a GridDyn model from
@@ -41,8 +41,8 @@ access can follow after the simulation workflow is stable.
 
 ## Current State
 
-The existing Python interface is generated from `interfaces/griddyn.i` and
-`interfaces/python/griddynPython.i`. It exposes the C API from
+The retired Python interface was generated from `interfaces/griddyn.i` and
+`interfaces/python/griddynPython.i`. It exposed the C API from
 `src/griddyn_shared/griddyn_export.h` and
 `src/griddyn_shared/griddyn_export_advanced.h`.
 
@@ -238,58 +238,26 @@ Use the `rtunits` Python package as the local model:
 - CMake-driven extension build
 - package-local compiled extension
 
-Likely CMake options:
+Python library CMake option:
 
 ```cmake
 GRIDDYN_BUILD_PYTHON_LIBRARY=ON
-GRIDDYN_BUILD_SWIG_INTERFACE=OFF
 ```
 
-The current `GRIDDYN_BUILD_PYTHON_INTERFACE` name is ambiguous because it points
-to the SWIG interface today. As the new work lands, the CMake option names
-should make the distinction clear:
-
-- `GRIDDYN_BUILD_PYTHON_LIBRARY` for the nanobind package
-- `GRIDDYN_BUILD_SWIG_INTERFACES` or similar for the legacy SWIG bindings
-
 The nanobind target should link to internal C++ targets needed by
 `GriddynRunner` and `GridDynSimulation`, not to `griddyn_shared_lib`.
 
-## SWIG Deprecation And Removal
-
-There are currently no known users relying on the SWIG bindings. That means
-SWIG can likely be removed sooner rather than carried through a long
-compatibility period.
-
-Proposed policy:
-
-1. Do not add new SWIG typemaps, generated files, or SWIG-based language
-   interfaces.
-2. Add deprecation messaging to the SWIG CMake path once the nanobind
-   `Simulation` API can load and run a model.
-3. Disable SWIG Python builds by default as soon as the nanobind package covers
-   the basic simulation workflow.
-4. Remove SWIG Python sources after a short transition period if no users
-   appear.
-5. Remove Matlab/Octave/Java SWIG paths unless a concrete user need appears.
-6. If Matlab support is needed later, prefer a command-line, file-based, or
-   purpose-built interface rather than reviving SWIG.
-
-## C API Removal Direction
-
-The nanobind migration should not depend on the C API. Once the Python package
-and any other required workflows no longer need it, the C API can be retired.
+## SWIG Removal
 
-Removal should be a separate cleanup phase because the C API currently packages
-several useful concepts:
+The SWIG-generated language interfaces have been removed. Do not add new SWIG
+typemaps, generated files, or SWIG-based language interfaces. If Matlab or
+another language needs support later, prefer a command-line, file-based, or
+purpose-built interface rather than reviving SWIG.
 
-- opaque object handles
-- centralized exception-to-error-code translation
-- shared-library export boundaries
-- raw-array math and solver access
+## C API Removal
 
-Those concepts should either disappear from the public surface or be replaced
-by clearer C++/Python mechanisms before the C API is deleted.
+The nanobind migration does not depend on the C API. The old C shared-library
+target and its export headers have been removed from the maintained build.
 
 ## Future API Phases
 
@@ -367,7 +335,7 @@ publish to TestPyPI or PyPI until the Python API is more complete.
 
 ## Working Checklist
 
-- [ ] Choose final package location.
+- [x] Choose final package location.
 - [x] Add `pyproject.toml` for scikit-build-core.
 - [x] Add nanobind CMake discovery and extension target.
 - [x] Add `griddyn` Python package directory.
@@ -378,6 +346,5 @@ publish to TestPyPI or PyPI until the Python API is more complete.
 - [x] Add CI wheel build and smoke test without package-index publishing.
 - [ ] Add load and powerflow smoke test.
 - [ ] Add documentation for the first Python API.
-- [ ] Add SWIG deprecation messaging.
-- [ ] Disable SWIG Python by default once the nanobind smoke tests pass.
-- [ ] Decide whether to remove Matlab/Octave/Java SWIG build paths.
+- [x] Remove SWIG interface sources and CMake build paths.
+- [x] Remove the C shared-library target.