leo/compiler/parser/examples/input_parser.rs
2023-08-17 17:22:56 -04:00

71 lines
2.3 KiB
Rust

// Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the Leo library.
// The Leo library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// The Leo library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
#![forbid(unsafe_code)]
use leo_ast::NodeBuilder;
use leo_errors::{emitter::Handler, Result};
use leo_span::symbol::create_session_if_not_set_then;
use clap::Parser;
use std::{
fs,
path::{Path, PathBuf},
};
#[derive(Debug, Parser)]
#[clap(name = "input parser", about = "Parse an Input file and save its JSON representation")]
struct Opt {
/// Path to the input file.
input_path: PathBuf,
/// Optional path to the output directory.
out_dir_path: Option<PathBuf>,
/// Whether to print result to STDOUT.
#[clap(short, long)]
print_stdout: bool,
}
fn main() -> Result<(), String> {
let opt = Opt::parse();
let input_tree = create_session_if_not_set_then(|s| {
let input_string = s.source_map.load_file(&opt.input_path).expect("failed to open an input file");
Handler::with(|handler| {
let node_builder = NodeBuilder::default();
let input =
leo_parser::parse_program_inputs(handler, &node_builder, &input_string.src, input_string.start_pos)?;
input.to_json_string()
})
.map_err(|e| e.to_string())
})?;
if opt.print_stdout {
println!("{input_tree}");
}
let out_path = if let Some(out_dir) = opt.out_dir_path {
format!("{}/{}.json", out_dir.as_path().display(), opt.input_path.file_stem().unwrap().to_str().unwrap())
} else {
format!("./{}.json", opt.input_path.file_stem().unwrap().to_str().unwrap())
};
fs::write(Path::new(&out_path), input_tree).expect("failed to write output");
Ok(())
}