Gear WASM Builder

This is a helper crate that can be used in build scripts for building Gear programs.

Usage

1. Add the gear-wasm-buider crate as a build dependency to the Cargo.toml:

```toml

...

[build-dependencies] gear-wasm-builder = "0.1.2"

...

```

1. Create a build.rs file and place it at the directory with Cargo.toml:

rust fn main() { gear_wasm_builder::build(); }

1. Use cargo as usually:

bash cargo clean cargo build cargo build --release cargo test cargo test --release

1. Find the built WASM binaries in target/wasm32-unknown-unknown/<profile> directory:

• .wasm — original WASM built from the source files
• .opt.wasm — optimised WASM binary to be submitted to the blockchain
• .meta.wasm — metadata providing WASM binary for auxiliary purposes

1. Also, you can include a generated wasm_binary.rs source file to use the WASM code while e.g. writing tests.

```rust mod code { include!(concat!(env!("OUTDIR"), "/wasmbinary.rs")); }

[test]

fn debugwasm() { asserteq!( std::fs::read("target/wasm32-unknown-unknown/debug/testprogram.wasm").unwrap(), code::WASMBINARY, ); asserteq!( std::fs::read("target/wasm32-unknown-unknown/debug/testprogram.opt.wasm").unwrap(), code::WASMBINARYOPT, ); asserteq!( std::fs::read("target/wasm32-unknown-unknown/debug/testprogram.meta.wasm").unwrap(), code::WASMBINARYMETA, ); } ```

License

Source code is licensed under GPL-3.0-or-later WITH Classpath-exception-2.0.