Struct ZWasmConfig 

pub struct ZWasmConfig {
    pub target: String,
    pub optimize: bool,
    pub opt_level: Option<String>,
    pub language: Option<String>,
    pub wit: Option<String>,
    pub world: Option<String>,
    pub output: Option<String>,
    pub features: Vec<String>,
    pub build_args: HashMap<String, String>,
    pub pre_build: Vec<ZCommand>,
    pub post_build: Vec<ZCommand>,
    pub adapter: Option<String>,
}

WebAssembly build configuration for WASM mode.

YAML Example

wasm:
  target: "preview2"
  optimize: true
  opt_level: "Oz"
  language: "rust"
  world: "zlayer-http-handler"
  wit: "./wit"
  output: "./output.wasm"
  features: [json, metrics]
  build_args:
    CARGO_PROFILE_RELEASE_LTO: "true"
  pre_build:
    - "wit-bindgen tiny-go --world zlayer-http-handler --out-dir bindings/"
  post_build:
    - "wasm-tools component embed --world zlayer-http-handler wit/ output.wasm -o output.wasm"
  adapter: "./wasi_snapshot_preview1.reactor.wasm"

Fields

target: String

WASI target version: “preview1” or “preview2” (default: “preview2”)

optimize: bool

Whether to run wasm-opt on the output

opt_level: Option<String>

Optimization level for wasm-opt: “O”, “Os”, “Oz”, “O2”, “O3” (default: “Oz”)

language: Option<String>

Source language (auto-detected if omitted): rust, go, python, typescript, assemblyscript, c, zig

wit: Option<String>

Path to WIT definitions (default: “./wit”)

world: Option<String>

Target WIT world name (e.g., “zlayer-http-handler”, “zlayer-plugin”, “zlayer-transformer”, “zlayer-authenticator”, “zlayer-rate-limiter”, “zlayer-middleware”, “zlayer-router”)

output: Option<String>

Output path for the compiled WASM file

features: Vec<String>

Language-specific features to enable during build

build_args: HashMap<String, String>

Additional build arguments (language-specific, e.g. CARGO_PROFILE_RELEASE_LTO)

pre_build: Vec<ZCommand>

Pre-build commands to run before compilation (e.g., WIT binding generation for Go)

post_build: Vec<ZCommand>

Post-build commands to run after compilation (before optimization)

adapter: Option<String>

Component adapter path for WASI preview1 -> preview2 lifting

Trait Implementations

impl Clone for ZWasmConfig

fn clone(&self) -> ZWasmConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ZWasmConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ZWasmConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ZWasmConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.