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https://github.com/fluencelabs/wasm-bindgen
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Rename directories to remove "wasm-bindgen-" prefix in sub-crates
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76
crates/cli/src/bin/wasm2es6js.rs
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76
crates/cli/src/bin/wasm2es6js.rs
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#[macro_use]
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extern crate serde_derive;
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extern crate docopt;
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extern crate parity_wasm;
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extern crate wasm_bindgen_cli_support;
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use std::fs::File;
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use std::io::{Write, Read};
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use std::path::PathBuf;
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use docopt::Docopt;
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const USAGE: &'static str = "
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Converts a wasm file to an ES6 JS module
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Usage:
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wasm2es6js [options] <input>
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wasm2es6js -h | --help
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Options:
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-h --help Show this screen.
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-o --output FILE File to place output in
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--typescript Output a `*.d.ts` file next to the JS output
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--base64 Inline the wasm module using base64 encoding
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Note that this is not intended to produce a production-ready output module
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but rather is intended purely as a temporary \"hack\" until it's standard in
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bundlers for working with wasm. Use this program with care!
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";
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#[derive(Debug, Deserialize)]
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struct Args {
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flag_output: Option<PathBuf>,
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flag_typescript: bool,
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flag_base64: bool,
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arg_input: PathBuf,
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}
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fn main() {
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let args: Args = Docopt::new(USAGE)
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.and_then(|d| d.deserialize())
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.unwrap_or_else(|e| e.exit());
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if !args.flag_base64 {
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panic!("unfortunately only works right now with base64");
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}
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let mut wasm = Vec::new();
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File::open(&args.arg_input).expect("failed to open input")
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.read_to_end(&mut wasm).expect("failed to read input");
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let object = wasm_bindgen_cli_support::wasm2es6js::Config::new()
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.base64(args.flag_base64)
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.generate(&wasm)
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.expect("failed to parse wasm");
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if args.flag_typescript {
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if let Some(ref p) = args.flag_output {
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let dst = p.with_extension("d.ts");
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File::create(dst).expect("failed to create output")
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.write_all(object.typescript().as_bytes()).expect("failed to write output");
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}
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}
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let js = object.js();
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match args.flag_output {
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Some(ref p) => {
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File::create(p).expect("failed to create output")
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.write_all(js.as_bytes()).expect("failed to write output");
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}
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None => {
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println!("{}", js);
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}
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}
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}
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