wasm-utils/cli/pack/main.rs

extern crate parity_wasm;
extern crate pwasm_utils as utils;
extern crate pwasm_utils_cli as logger;
extern crate clap;

use clap::{App, Arg};

fn main() {
    logger::init_log();

    let matches = App::new("wasm-pack")
                        .arg(Arg::with_name("input")
                            .index(1)
                            .required(true)
                            .help("Input WASM file"))
                        .arg(Arg::with_name("output")
                            .index(2)
                            .required(true)
                            .help("Output WASM file"))
                        .get_matches();

    let input = matches.value_of("input").expect("is required; qed");
    let output = matches.value_of("output").expect("is required; qed");

    let module = parity_wasm::deserialize_file(&input).expect("Input module deserialization failed");
    let ctor_module = module.clone();
	let raw_module = parity_wasm::serialize(module).expect("Serialization failed");

    // Invoke packer
    let mut result_module = utils::pack_instance(raw_module, ctor_module).expect("Packing failed");
    // Optimize constructor, since it does not need everything
    utils::optimize(&mut result_module, vec![utils::CALL_SYMBOL]).expect("Optimization failed");

    parity_wasm::serialize_to_file(&output, result_module).expect("Serialization failed");
}