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parse_folder.rs
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149 lines (134 loc) · 4.25 KB
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/// This an example usage of the rustpython_parser crate.
/// This program crawls over a directory of python files and
/// tries to parse them into an abstract syntax tree (AST)
///
/// example usage:
/// $ RUST_LOG=info cargo run --release parse_folder /usr/lib/python3.7
#[macro_use]
extern crate clap;
extern crate env_logger;
#[macro_use]
extern crate log;
use clap::{App, Arg};
use rustpython_parser::{ast, parser};
use std::path::Path;
use std::time::{Duration, Instant};
fn main() {
env_logger::init();
let app = App::new("parse_folders")
.version(crate_version!())
.author(crate_authors!())
.about("Walks over all .py files in a folder, and parses them.")
.arg(
Arg::with_name("folder")
.help("Folder to scan")
.required(true),
);
let matches = app.get_matches();
let folder = Path::new(matches.value_of("folder").unwrap());
if folder.exists() && folder.is_dir() {
println!("Parsing folder of python code: {:?}", folder);
let t1 = Instant::now();
let parsed_files = parse_folder(&folder).unwrap();
let t2 = Instant::now();
let results = ScanResult {
t1,
t2,
parsed_files,
};
statistics(results);
} else {
println!("{:?} is not a folder.", folder);
}
}
fn parse_folder(path: &Path) -> std::io::Result<Vec<ParsedFile>> {
let mut res = vec![];
info!("Parsing folder of python code: {:?}", path);
for entry in path.read_dir()? {
debug!("Entry: {:?}", entry);
let entry = entry?;
let metadata = entry.metadata()?;
let path = entry.path();
if metadata.is_dir() {
res.extend(parse_folder(&path)?);
}
if metadata.is_file() && path.extension().and_then(|s| s.to_str()) == Some("py") {
let parsed_file = parse_python_file(&path);
match &parsed_file.result {
Ok(_) => {}
Err(y) => error!("Erreur in file {:?} {:?}", path, y),
}
res.push(parsed_file);
}
}
Ok(res)
}
fn parse_python_file(filename: &Path) -> ParsedFile {
info!("Parsing file {:?}", filename);
match std::fs::read_to_string(filename) {
Err(e) => ParsedFile {
// filename: Box::new(filename.to_path_buf()),
// code: "".to_string(),
num_lines: 0,
result: Err(e.to_string()),
},
Ok(source) => {
let num_lines = source.to_string().lines().count();
let result = parser::parse_program(&source).map_err(|e| e.to_string());
ParsedFile {
// filename: Box::new(filename.to_path_buf()),
// code: source.to_string(),
num_lines,
result,
}
}
}
}
fn statistics(results: ScanResult) {
// println!("Processed {:?} files", res.len());
println!("Scanned a total of {} files", results.parsed_files.len());
let total: usize = results.parsed_files.len();
let total_lines: usize = results.parsed_files.iter().map(|p| p.num_lines).sum();
let failed = results
.parsed_files
.iter()
.filter(|p| p.result.is_err())
.count();
let passed = results
.parsed_files
.iter()
.filter(|p| p.result.is_ok())
.count();
println!("Passed: {} Failed: {} Total: {}", passed, failed, total);
println!(
"That is {} % success rate.",
(passed as f64 * 100.0) / total as f64
);
let duration = results.t2 - results.t1;
println!("Total time spend: {:?}", duration);
println!(
"Processed {} files. That's {} files/second",
total,
rate(total, duration)
);
println!(
"Processed {} lines of python code. That's {} lines/second",
total_lines,
rate(total_lines, duration)
);
}
fn rate(counter: usize, duration: Duration) -> f64 {
(counter * 1_000_000) as f64 / duration.as_micros() as f64
}
struct ScanResult {
t1: Instant,
t2: Instant,
parsed_files: Vec<ParsedFile>,
}
struct ParsedFile {
// filename: Box<PathBuf>,
// code: String,
num_lines: usize,
result: ParseResult,
}
type ParseResult = Result<ast::Program, String>;