worker-build

This is a tool to be used as a custom build command for a Cloudflare Workers project.

# wrangler.toml
# ...

[build]
command = "cargo install -q worker-build && worker-build --release"

[build.upload]
dir    = "build/worker"
format = "modules"
main   = "./shim.mjs"

[[build.upload.rules]]
globs = ["**/*.wasm"]
type  = "CompiledWasm"

Environment Variables

You can override the default binary lookup/download behavior by setting these environment variables:

• WASM_BINDGEN_BIN: Path to a custom wasm-bindgen binary. When set, worker-build will use this binary instead of downloading or looking for a globally installed version.

• WASM_OPT_BIN: Path to a custom wasm-opt binary. When set, worker-build will use this binary instead of downloading one.

Example

export WASM_BINDGEN_BIN=/path/to/custom/wasm-bindgen
export WASM_OPT_BIN=/path/to/custom/wasm-opt
worker-build --release