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115 lines
3.1 KiB
Rust
115 lines
3.1 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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//! This module provides file formating utilities using
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//! [`deno_lint`](https://github.com/denoland/deno_lint).
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//!
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//! At the moment it is only consumed using CLI but in
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//! the future it can be easily extended to provide
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//! the same functions as ops available in JS runtime.
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use crate::colors;
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use crate::file_fetcher::map_file_extension;
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use crate::fmt::collect_files;
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use crate::fmt::run_parallelized;
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use crate::fmt_errors;
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use crate::swc_util;
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use deno_core::ErrBox;
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use deno_lint::diagnostic::LintDiagnostic;
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use deno_lint::linter::Linter;
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use deno_lint::rules;
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use std::fs;
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use std::path::PathBuf;
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use std::sync::atomic::{AtomicUsize, Ordering};
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use std::sync::{Arc, Mutex};
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pub async fn lint_files(args: Vec<String>) -> Result<(), ErrBox> {
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let target_files = collect_files(args)?;
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debug!("Found {} files", target_files.len());
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let error_count = Arc::new(AtomicUsize::new(0));
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// prevent threads outputting at the same time
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let output_lock = Arc::new(Mutex::new(0));
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run_parallelized(target_files, {
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let error_count = error_count.clone();
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move |file_path| {
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let r = lint_file(file_path.clone());
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match r {
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Ok(file_diagnostics) => {
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error_count.fetch_add(file_diagnostics.len(), Ordering::SeqCst);
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let _g = output_lock.lock().unwrap();
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for d in file_diagnostics.iter() {
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let fmt_diagnostic = format_diagnostic(d);
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eprintln!("{}\n", fmt_diagnostic);
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}
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}
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Err(err) => {
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eprintln!("Error linting: {}", file_path.to_string_lossy());
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eprintln!(" {}", err);
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}
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}
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Ok(())
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}
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})
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.await?;
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let error_count = error_count.load(Ordering::SeqCst);
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if error_count > 0 {
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eprintln!("Found {} problems", error_count);
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std::process::exit(1);
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}
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Ok(())
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}
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fn create_linter() -> Linter {
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Linter::new(
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"deno-lint-ignore-file".to_string(),
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vec![
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"deno-lint-ignore".to_string(),
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"eslint-disable-next-line".to_string(),
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],
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// TODO(bartlomieju): switch to true, once
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// https://github.com/denoland/deno_lint/issues/156 is fixed
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false,
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)
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}
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fn lint_file(file_path: PathBuf) -> Result<Vec<LintDiagnostic>, ErrBox> {
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let file_name = file_path.to_string_lossy().to_string();
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let source_code = fs::read_to_string(&file_path)?;
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let media_type = map_file_extension(&file_path);
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let syntax = swc_util::get_syntax_for_media_type(media_type);
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let mut linter = create_linter();
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let lint_rules = rules::get_recommended_rules();
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let file_diagnostics =
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linter.lint(file_name, source_code, syntax, lint_rules)?;
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Ok(file_diagnostics)
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}
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fn format_diagnostic(d: &LintDiagnostic) -> String {
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let pretty_message = format!(
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"({}) {}",
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colors::gray(d.code.to_string()),
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d.message.clone()
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);
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fmt_errors::format_stack(
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true,
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pretty_message,
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Some(d.line_src.clone()),
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Some(d.location.col as i64),
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Some((d.location.col + d.snippet_length) as i64),
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&[fmt_errors::format_location(
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d.location.filename.clone(),
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d.location.line as i64,
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d.location.col as i64,
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)],
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0,
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)
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}
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