neovim/cmake/FindWasmtime.cmake
Lewis Russell 688b961d13 feat(treesitter): add support for wasm parsers
Problem: Installing treesitter parser is hard (harder than
climbing to heaven).

Solution: Add optional support for wasm parsers with `wasmtime`.

Notes:

* Needs to be enabled by setting `ENABLE_WASMTIME` for tree-sitter and
  Neovim. Build with
  `make CMAKE_EXTRA_FLAGS=-DENABLE_WASMTIME=ON
  DEPS_CMAKE_FLAGS=-DENABLE_WASMTIME=ON`
* Adds optional Rust (obviously) and C11 dependencies.
* Wasmtime comes with a lot of features that can negatively affect
  Neovim performance due to library and symbol table size. Make sure to
  build with minimal features and full LTO.
* To reduce re-compilation times, install `sccache` and build with
  `RUSTC_WRAPPER=<path/to/sccache> make ...`
2024-08-26 16:44:03 +02:00

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CMake

find_path2(WASMTIME_INCLUDE_DIR wasmtime.h)
find_library2(WASMTIME_LIBRARY wasmtime)
if(WASMTIME_INCLUDE_DIR AND EXISTS "${WASMTIME_INCLUDE_DIR}/wasmtime.h")
file(STRINGS ${WASMTIME_INCLUDE_DIR}/wasmtime.h WASMTIME_VERSION REGEX "#define WASMTIME_VERSION")
string(REGEX MATCH "[0-9]+\.[0-9]\.[0-9]" WASMTIME_VERSION ${WASMTIME_VERSION})
endif()
find_package_handle_standard_args(Wasmtime
REQUIRED_VARS WASMTIME_INCLUDE_DIR WASMTIME_LIBRARY
VERSION_VAR WASMTIME_VERSION)
add_library(wasmtime INTERFACE)
target_include_directories(wasmtime SYSTEM BEFORE INTERFACE ${WASMTIME_INCLUDE_DIR})
target_link_libraries(wasmtime INTERFACE ${WASMTIME_LIBRARY})
if(MSVC)
target_compile_options(wasmtime INTERFACE -DWASM_API_EXTERN= -DWASI_API_EXTERN=)
target_link_libraries(wasmtime INTERFACE ws2_32 advapi32 userenv ntdll shell32 ole32 bcrypt)
endif()
mark_as_advanced(WASMTIME_INCLUDE_DIR WASMTIME_LIBRARY)