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2.8 KiB
2.8 KiB
@next/swc
This package is responsible for swc compilation customized for next.js
Development
Run tests
cargo test
# Update snapshots and fixtures for tests
UPDATE=1 cargo test
Format code before submitting code
cargo fmt
Build the binary to integrate with next.js
pnpm build-native
Build wasm bindings to integrate with next.js
pnpm build-wasm
napi bindings feature matrix
Due to platform differences napi bindings selectively enables supported features. See below tables for the currently enabled features.
| arch\platform | Linux(gnu) | Linux(musl) | Darwin | Windows |
|---|---|---|---|---|
| x64 | a,b,d,e,f | a,b,d,e,f | a,b,d,e,f | a,b,d,e,f |
| aarch64 | a,d,e,f | a,d,e,f | a,b,d,e,f | a,b,c,e |
- a:
turbo_tasks_malloc - b:
turbo_tasks_malloc_custom_allocator - c:
native-tls(viaturbo-tasks-fetch) - d:
rustls-tls(viaturbo-tasks-fetch) - e:
image-extended(webp) - f:
plugin
Package hierarchies
@next/swc consist of multiple rust packages to enable features. See below for the high level hierarchies.
flowchart TD
C(next-custom-transforms) --> A(napi)
C(next-custom-transforms) --> B(wasm)
D(next-core) --> A(napi)
E(next-build) --> A(napi)
F(next-api) --> A(napi)
C(next-custom-transforms) --> D
D(next-core) --> F(next-api)
D(next-core) --> E(next-build)
next-custom-transforms: provides next-swc specific SWC transform visitors. Turbopack, and the plain next-swc bindings (transform) use these transforms. Since this is a bottom package can be imported in any place (turbopack / next-swc / wasm), it is important package do not contain specific dependencies. For example, using Turbopack's VC in this package will cause build failures to wasm bindings.next-core: Implements Turbopack features for the next.js core functionality. This is also the place where Turbopack-specific transform providers (implementingCustomTransformer) lives, which wraps swc's transformer in thenext-custom-transforms.next-api: Binding interface to the next.js provides a proper next.js functionality usingnext-core.napi/wasm: The actual binding interfaces, napi for the node.js and wasm for the wasm. Note wasm bindings cannot import packages using turbopack's feature.
To add new swc transforms
- Implements a new visitor in
next-custom-transforms. It is highly encouraged to useVisitMutinstead ofFoldfor the performance reasons. - Implements a new
CustomTransformerundercrates/next-core/src/next_shared/transformsto make Turbopack's ecma transform plugin, then adjust corresponding rules incrates/next-core/src/(next_client|next_server)/context.rs.