95 lines
2.9 KiB
Rust
95 lines
2.9 KiB
Rust
extern crate clap;
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#[macro_use]
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extern crate failure;
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extern crate libeditor;
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extern crate tools;
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use std::{
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fs, io::Read, path::Path,
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time::Instant
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};
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use clap::{App, Arg, SubCommand};
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use tools::collect_tests;
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use libeditor::{ast, syntax_tree, symbols};
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type Result<T> = ::std::result::Result<T, failure::Error>;
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fn main() -> Result<()> {
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let matches = App::new("libsyntax2-cli")
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.setting(clap::AppSettings::SubcommandRequiredElseHelp)
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.subcommand(
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SubCommand::with_name("render-test")
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.arg(
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Arg::with_name("line")
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.long("--line")
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.required(true)
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.takes_value(true),
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)
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.arg(
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Arg::with_name("file")
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.long("--file")
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.required(true)
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.takes_value(true),
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),
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)
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.subcommand(
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SubCommand::with_name("parse")
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.arg(Arg::with_name("no-dump").long("--no-dump"))
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)
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.subcommand(SubCommand::with_name("symbols"))
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.get_matches();
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match matches.subcommand() {
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("parse", Some(matches)) => {
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let start = Instant::now();
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let file = file()?;
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let elapsed = start.elapsed();
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if !matches.is_present("no-dump") {
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println!("{}", syntax_tree(&file));
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}
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eprintln!("parsing: {:?}", elapsed);
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::std::mem::forget(file);
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}
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("symbols", _) => {
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let file = file()?;
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for s in symbols(&file) {
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println!("{:?}", s);
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}
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}
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("render-test", Some(matches)) => {
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let file = matches.value_of("file").unwrap();
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let file = Path::new(file);
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let line: usize = matches.value_of("line").unwrap().parse()?;
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let line = line - 1;
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let (test, tree) = render_test(file, line)?;
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println!("{}\n{}", test, tree);
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}
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_ => unreachable!(),
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}
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Ok(())
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}
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fn file() -> Result<ast::File> {
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let text = read_stdin()?;
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Ok(ast::File::parse(&text))
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}
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fn read_stdin() -> Result<String> {
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let mut buff = String::new();
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::std::io::stdin().read_to_string(&mut buff)?;
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Ok(buff)
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}
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fn render_test(file: &Path, line: usize) -> Result<(String, String)> {
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let text = fs::read_to_string(file)?;
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let tests = collect_tests(&text);
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let test = tests.into_iter().find(|(start_line, t)| {
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*start_line <= line && line <= *start_line + t.text.lines().count()
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});
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let test = match test {
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None => bail!("No test found at line {} at {}", line, file.display()),
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Some((_start_line, test)) => test,
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};
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let file = ast::File::parse(&test.text);
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let tree = syntax_tree(&file);
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Ok((test.text, tree))
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}
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