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+1,36 @@ +extern crate structopt; + use crate::generator::Generator; +use crate::Opt::Build; use std::fs::File; use std::io::Read; use std::io::Write; +use std::path::PathBuf; +use structopt::StructOpt; mod generator; mod lexer; mod parser; mod util; +#[derive(StructOpt, Debug)] +enum Opt { + #[structopt()] + Build { + #[structopt(default_value = "./examples/playground.sb")] + in_file: PathBuf, + #[structopt(short, long, default_value = "./examples_out/playground.js")] + out_file: PathBuf, + }, +} + fn main() -> Result<(), String> { - let mut file = File::open("examples/playground.sb").expect("Could not open file"); + let opts = Opt::from_args(); + + let (in_file, out_file) = match opts { + Build { in_file, out_file } => (in_file, out_file), + }; + let mut file = File::open(in_file).expect("Could not open file"); let mut contents = String::new(); file.read_to_string(&mut contents) .expect("Could not read file"); @@ -22,7 +43,7 @@ fn main() -> Result<(), String> { dbg!(":#?", &program); let output = generator::js::JsGenerator::generate(program); - let mut file = std::fs::File::create("examples_out/out.js").expect("create failed"); + let mut file = std::fs::File::create(out_file).expect("create failed"); file.write_all(output.as_bytes()).expect("write failed"); file.flush().expect("Could not flush file"); Ok(())