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69 lines
2.7 KiB
Rust
69 lines
2.7 KiB
Rust
// Copyright (C) 2019-2021 Aleo Systems Inc.
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// This file is part of the Leo library.
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// The Leo library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// The Leo library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
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use leo_ast::Ast;
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use leo_parser::errors::SyntaxError;
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use std::{env, fs, path::Path};
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fn to_leo_tree(filepath: &Path) -> Result<String, SyntaxError> {
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// Loads the Leo code as a string from the given file path.
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let program_filepath = filepath.to_path_buf();
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let program_string = fs::read_to_string(&program_filepath).expect("failed to open input file");
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// Parses the Leo file and constructs an ast.
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let ast = leo_parser::parse_ast(filepath.to_str().unwrap(), &program_string)?;
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let serialized_leo_ast = Ast::to_json_string(&ast).expect("serialization failed");
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Ok(serialized_leo_ast)
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}
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fn main() -> Result<(), SyntaxError> {
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// Parse the command-line arguments as strings.
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let cli_arguments = env::args().collect::<Vec<String>>();
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// Check that the correct number of command-line arguments were passed in.
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if cli_arguments.len() < 2 || cli_arguments.len() > 3 {
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eprintln!("Warning - an invalid number of command-line arguments were provided.");
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println!(
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"\nCommand-line usage:\n\n\tleo_ast {{PATH/TO/INPUT_FILENAME}}.leo {{PATH/TO/OUTPUT_DIRECTORY (optional)}}\n"
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);
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return Ok(()); // Exit innocently
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}
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// Construct the input filepath.
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let input_filepath = Path::new(&cli_arguments[1]);
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// Construct the serialized syntax tree.
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let serialized_leo_tree = to_leo_tree(&input_filepath)?;
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println!("{}", serialized_leo_tree);
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// Determine the output directory.
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let output_directory = match cli_arguments.len() == 3 {
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true => format!(
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"{}/{}.json",
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cli_arguments[2],
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input_filepath.file_stem().unwrap().to_str().unwrap()
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),
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false => format!("./{}.json", input_filepath.file_stem().unwrap().to_str().unwrap()),
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};
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// Write the serialized syntax tree to the output directory.
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fs::write(Path::new(&output_directory), serialized_leo_tree).expect("failed to write output");
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Ok(())
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}
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