neovim/cmake.deps/cmake/BuildWasmtime.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

# wasmtime is a chungus -- optimize _extra hard_ to keep nvim svelte
get_externalproject_options(wasmtime ${DEPS_IGNORE_SHA})
ExternalProject_Add(wasmtime
DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/wasmtime
SOURCE_SUBDIR crates/c-api
CMAKE_ARGS ${DEPS_CMAKE_ARGS}
-D WASMTIME_FASTEST_RUNTIME=ON # build with full LTO
-D WASMTIME_DISABLE_ALL_FEATURES=ON # don't need all that crap...
-D WASMTIME_FEATURE_CRANELIFT=ON # ...except this one (compiles wasm to platform code)
USES_TERMINAL_BUILD TRUE
${EXTERNALPROJECT_OPTIONS})