2766ebc8d3
### What? There is a race condition in the `pull-build-cache` script. When the remote cache entry was removed between the dry run and the real run, it will run the command and caches whatever is in the native folder. Seems like there are some very old leftover files there which lead to an broken publish. This changes the command to fail when there are no files and empties the folder before running the script. This should lead to pull-build-cache to failing instead. Closes PACK-2957 Fixes #64468 |
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.. | ||
crates | ||
native | ||
package.json | ||
README.md |
@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 | Win32 |
---|---|---|---|---|
ia32 | a,b,d,e | |||
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
, - d:
rustls-tls
, - 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 bidnings (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 useVisitMut
instead ofFold
for the performance reasons. - Implements a new
CustomTransformer
underpackages/next-swc/crates/next-core/src/next_shared/transforms
to make Turbopack's ecma transform plugin, then adjust corresponding rules inpackages/next-swc/crates/next-core/src/(next_client|next_server)/context.rs
.