Files
wasm-instrument/cli/prune/main.rs
T
Alexander Theißen a0b548b37d Add rustfmt.toml from substrate repo (#161)
* Add rustfmt.toml from substrate repo

* Apply rustfmt to code base

* Fix formatting

* Move rustfmt job to the top
2021-07-27 14:46:28 +02:00

43 lines
1.2 KiB
Rust

use clap::{App, Arg};
use pwasm_utils::{self as utils, logger};
fn main() {
logger::init();
let target_runtime = utils::TargetRuntime::pwasm();
let matches = App::new("wasm-prune")
.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"))
.arg(
Arg::with_name("exports")
.long("exports")
.short("e")
.takes_value(true)
.value_name("functions")
.help(&format!(
"Comma-separated list of exported functions to keep. Default: '{}'",
target_runtime.symbols().call
)),
)
.get_matches();
let exports = matches
.value_of("exports")
.unwrap_or(target_runtime.symbols().call)
.split(',')
.collect();
let input = matches.value_of("input").expect("is required; qed");
let output = matches.value_of("output").expect("is required; qed");
let mut module = parity_wasm::deserialize_file(&input).unwrap();
// Invoke optimizer
// Contract is supposed to have only these functions as public api
// All other symbols not usable by this list is optimized away
utils::optimize(&mut module, exports).expect("Optimizer failed");
parity_wasm::serialize_to_file(&output, module).expect("Serialization failed");
}