mirror of
https://github.com/denoland/deno.git
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574 lines
15 KiB
Rust
574 lines
15 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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//! This module provides file linting 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::args::CliOptions;
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use crate::args::FilesConfig;
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use crate::args::LintOptions;
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use crate::args::LintReporterKind;
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use crate::args::LintRulesConfig;
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use crate::colors;
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use crate::tools::fmt::run_parallelized;
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use crate::util::file_watcher;
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use crate::util::file_watcher::ResolutionResult;
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use crate::util::fs::FileCollector;
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use crate::util::path::is_supported_ext;
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use deno_ast::MediaType;
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use deno_core::anyhow::bail;
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use deno_core::error::generic_error;
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use deno_core::error::AnyError;
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use deno_core::error::JsStackFrame;
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use deno_core::serde_json;
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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::linter::LinterBuilder;
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use deno_lint::rules;
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use deno_lint::rules::LintRule;
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use deno_runtime::fmt_errors::format_location;
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use log::debug;
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use log::info;
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use serde::Serialize;
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use std::fs;
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use std::io::stdin;
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use std::io::Read;
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use std::path::PathBuf;
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use std::sync::atomic::AtomicBool;
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use std::sync::atomic::Ordering;
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use std::sync::Arc;
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use std::sync::Mutex;
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use crate::cache::IncrementalCache;
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static STDIN_FILE_NAME: &str = "_stdin.ts";
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fn create_reporter(kind: LintReporterKind) -> Box<dyn LintReporter + Send> {
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match kind {
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LintReporterKind::Pretty => Box::new(PrettyLintReporter::new()),
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LintReporterKind::Json => Box::new(JsonLintReporter::new()),
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LintReporterKind::Compact => Box::new(CompactLintReporter::new()),
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}
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}
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pub async fn lint(
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cli_options: CliOptions,
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lint_options: LintOptions,
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) -> Result<(), AnyError> {
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// Try to get lint rules. If none were set use recommended rules.
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let lint_rules = get_configured_rules(lint_options.rules);
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if lint_rules.is_empty() {
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bail!("No rules have been configured")
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}
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let files = lint_options.files;
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let reporter_kind = lint_options.reporter_kind;
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let resolver = |changed: Option<Vec<PathBuf>>| {
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let files_changed = changed.is_some();
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let result = collect_lint_files(&files).map(|files| {
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if let Some(paths) = changed {
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files
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.iter()
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.any(|path| paths.contains(path))
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.then_some(files)
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.unwrap_or_else(|| [].to_vec())
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} else {
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files
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}
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});
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let paths_to_watch = files.include.clone();
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async move {
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if files_changed && matches!(result, Ok(ref files) if files.is_empty()) {
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ResolutionResult::Ignore
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} else {
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ResolutionResult::Restart {
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paths_to_watch,
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result,
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}
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}
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}
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};
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let has_error = Arc::new(AtomicBool::new(false));
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let deno_dir = cli_options.resolve_deno_dir()?;
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let operation = |paths: Vec<PathBuf>| async {
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let incremental_cache = Arc::new(IncrementalCache::new(
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&deno_dir.lint_incremental_cache_db_file_path(),
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// use a hash of the rule names in order to bust the cache
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&{
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// ensure this is stable by sorting it
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let mut names = lint_rules.iter().map(|r| r.code()).collect::<Vec<_>>();
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names.sort_unstable();
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names
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},
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&paths,
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));
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let target_files_len = paths.len();
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let reporter_lock =
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Arc::new(Mutex::new(create_reporter(reporter_kind.clone())));
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run_parallelized(paths, {
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let has_error = has_error.clone();
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let lint_rules = lint_rules.clone();
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let reporter_lock = reporter_lock.clone();
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let incremental_cache = incremental_cache.clone();
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move |file_path| {
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let file_text = fs::read_to_string(&file_path)?;
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// don't bother rechecking this file if it didn't have any diagnostics before
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if incremental_cache.is_file_same(&file_path, &file_text) {
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return Ok(());
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}
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let r = lint_file(&file_path, file_text, lint_rules);
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if let Ok((file_diagnostics, file_text)) = &r {
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if file_diagnostics.is_empty() {
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// update the incremental cache if there were no diagnostics
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incremental_cache.update_file(&file_path, file_text)
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}
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}
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handle_lint_result(
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&file_path.to_string_lossy(),
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r,
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reporter_lock.clone(),
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has_error,
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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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incremental_cache.wait_completion().await;
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reporter_lock.lock().unwrap().close(target_files_len);
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Ok(())
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};
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if cli_options.watch_paths().is_some() {
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if lint_options.is_stdin {
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return Err(generic_error(
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"Lint watch on standard input is not supported.",
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));
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}
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file_watcher::watch_func(
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resolver,
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operation,
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file_watcher::PrintConfig {
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job_name: "Lint".to_string(),
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clear_screen: !cli_options.no_clear_screen(),
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},
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)
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.await?;
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} else {
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if lint_options.is_stdin {
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let reporter_lock = Arc::new(Mutex::new(create_reporter(reporter_kind)));
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let r = lint_stdin(lint_rules);
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handle_lint_result(
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STDIN_FILE_NAME,
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r,
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reporter_lock.clone(),
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has_error.clone(),
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);
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reporter_lock.lock().unwrap().close(1);
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} else {
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let target_files = collect_lint_files(&files).and_then(|files| {
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if files.is_empty() {
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Err(generic_error("No target files found."))
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} else {
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Ok(files)
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}
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})?;
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debug!("Found {} files", target_files.len());
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operation(target_files).await?;
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};
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let has_error = has_error.load(Ordering::Relaxed);
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if has_error {
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std::process::exit(1);
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}
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}
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Ok(())
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}
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fn collect_lint_files(files: &FilesConfig) -> Result<Vec<PathBuf>, AnyError> {
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FileCollector::new(is_supported_ext)
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.ignore_git_folder()
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.ignore_node_modules()
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.add_ignore_paths(&files.exclude)
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.collect_files(&files.include)
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}
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pub fn print_rules_list(json: bool) {
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let lint_rules = rules::get_recommended_rules();
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if json {
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let json_rules: Vec<serde_json::Value> = lint_rules
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.iter()
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.map(|rule| {
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serde_json::json!({
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"code": rule.code(),
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"tags": rule.tags(),
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"docs": rule.docs(),
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})
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})
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.collect();
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let json_str = serde_json::to_string_pretty(&json_rules).unwrap();
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println!("{}", json_str);
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} else {
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// The rules should still be printed even if `--quiet` option is enabled,
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// so use `println!` here instead of `info!`.
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println!("Available rules:");
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for rule in lint_rules.iter() {
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println!(" - {}", rule.code());
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println!(" help: https://lint.deno.land/#{}", rule.code());
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println!();
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}
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}
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}
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pub fn create_linter(
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media_type: MediaType,
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rules: Vec<Arc<dyn LintRule>>,
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) -> Linter {
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LinterBuilder::default()
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.ignore_file_directive("deno-lint-ignore-file")
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.ignore_diagnostic_directive("deno-lint-ignore")
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.media_type(media_type)
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.rules(rules)
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.build()
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}
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fn lint_file(
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file_path: &PathBuf,
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source_code: String,
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lint_rules: Vec<Arc<dyn LintRule>>,
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) -> Result<(Vec<LintDiagnostic>, String), AnyError> {
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let file_name = file_path.to_string_lossy().to_string();
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let media_type = MediaType::from(file_path);
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let linter = create_linter(media_type, lint_rules);
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let (_, file_diagnostics) = linter.lint(file_name, source_code.clone())?;
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Ok((file_diagnostics, source_code))
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}
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/// Lint stdin and write result to stdout.
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/// Treats input as TypeScript.
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/// Compatible with `--json` flag.
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fn lint_stdin(
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lint_rules: Vec<Arc<dyn LintRule>>,
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) -> Result<(Vec<LintDiagnostic>, String), AnyError> {
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let mut source_code = String::new();
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if stdin().read_to_string(&mut source_code).is_err() {
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return Err(generic_error("Failed to read from stdin"));
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}
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let linter = create_linter(MediaType::TypeScript, lint_rules);
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let (_, file_diagnostics) =
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linter.lint(STDIN_FILE_NAME.to_string(), source_code.clone())?;
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Ok((file_diagnostics, source_code))
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}
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fn handle_lint_result(
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file_path: &str,
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result: Result<(Vec<LintDiagnostic>, String), AnyError>,
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reporter_lock: Arc<Mutex<Box<dyn LintReporter + Send>>>,
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has_error: Arc<AtomicBool>,
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) {
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let mut reporter = reporter_lock.lock().unwrap();
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match result {
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Ok((mut file_diagnostics, source)) => {
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sort_diagnostics(&mut file_diagnostics);
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for d in file_diagnostics.iter() {
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has_error.store(true, Ordering::Relaxed);
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reporter.visit_diagnostic(d, source.split('\n').collect());
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}
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}
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Err(err) => {
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has_error.store(true, Ordering::Relaxed);
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reporter.visit_error(file_path, &err);
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}
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}
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}
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trait LintReporter {
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fn visit_diagnostic(&mut self, d: &LintDiagnostic, source_lines: Vec<&str>);
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fn visit_error(&mut self, file_path: &str, err: &AnyError);
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fn close(&mut self, check_count: usize);
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}
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#[derive(Serialize)]
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struct LintError {
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file_path: String,
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message: String,
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}
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struct PrettyLintReporter {
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lint_count: u32,
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}
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impl PrettyLintReporter {
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fn new() -> PrettyLintReporter {
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PrettyLintReporter { lint_count: 0 }
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}
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}
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impl LintReporter for PrettyLintReporter {
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fn visit_diagnostic(&mut self, d: &LintDiagnostic, source_lines: Vec<&str>) {
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self.lint_count += 1;
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let pretty_message = format!("({}) {}", colors::red(&d.code), &d.message);
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let message = format_diagnostic(
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&d.code,
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&pretty_message,
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&source_lines,
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&d.range,
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d.hint.as_ref(),
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&format_location(&JsStackFrame::from_location(
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Some(d.filename.clone()),
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// todo(dsherret): these should use "display positions"
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// which take into account the added column index of tab
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// indentation
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Some(d.range.start.line_index as i64 + 1),
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Some(d.range.start.column_index as i64 + 1),
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)),
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);
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eprintln!("{}\n", message);
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}
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fn visit_error(&mut self, file_path: &str, err: &AnyError) {
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eprintln!("Error linting: {}", file_path);
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eprintln!(" {}", err);
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}
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fn close(&mut self, check_count: usize) {
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match self.lint_count {
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1 => info!("Found 1 problem"),
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n if n > 1 => info!("Found {} problems", self.lint_count),
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_ => (),
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}
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match check_count {
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n if n <= 1 => info!("Checked {} file", n),
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n if n > 1 => info!("Checked {} files", n),
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_ => unreachable!(),
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}
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}
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}
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struct CompactLintReporter {
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lint_count: u32,
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}
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impl CompactLintReporter {
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fn new() -> CompactLintReporter {
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CompactLintReporter { lint_count: 0 }
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}
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}
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impl LintReporter for CompactLintReporter {
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fn visit_diagnostic(&mut self, d: &LintDiagnostic, _source_lines: Vec<&str>) {
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self.lint_count += 1;
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eprintln!(
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"{}: line {}, col {} - {} ({})",
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d.filename,
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d.range.start.line_index + 1,
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d.range.start.column_index + 1,
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d.message,
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d.code
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)
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}
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fn visit_error(&mut self, file_path: &str, err: &AnyError) {
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eprintln!("Error linting: {}", file_path);
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eprintln!(" {}", err);
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}
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fn close(&mut self, check_count: usize) {
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match self.lint_count {
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1 => info!("Found 1 problem"),
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n if n > 1 => info!("Found {} problems", self.lint_count),
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_ => (),
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}
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match check_count {
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n if n <= 1 => info!("Checked {} file", n),
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n if n > 1 => info!("Checked {} files", n),
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_ => unreachable!(),
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}
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}
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}
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pub fn format_diagnostic(
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diagnostic_code: &str,
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message_line: &str,
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source_lines: &[&str],
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range: &deno_lint::diagnostic::Range,
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maybe_hint: Option<&String>,
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formatted_location: &str,
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) -> String {
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let mut lines = vec![];
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for (i, line) in source_lines
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.iter()
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.enumerate()
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.take(range.end.line_index + 1)
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.skip(range.start.line_index)
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{
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lines.push(line.to_string());
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if range.start.line_index == range.end.line_index {
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lines.push(format!(
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"{}{}",
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" ".repeat(range.start.column_index),
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colors::red(
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&"^".repeat(range.end.column_index - range.start.column_index)
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)
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));
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} else {
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let line_len = line.len();
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if range.start.line_index == i {
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lines.push(format!(
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"{}{}",
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" ".repeat(range.start.column_index),
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colors::red(&"^".repeat(line_len - range.start.column_index))
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));
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} else if range.end.line_index == i {
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lines
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.push(colors::red(&"^".repeat(range.end.column_index)).to_string());
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} else if line_len != 0 {
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lines.push(colors::red(&"^".repeat(line_len)).to_string());
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}
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}
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}
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let hint = if let Some(hint) = maybe_hint {
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format!(" {} {}\n", colors::cyan("hint:"), hint)
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} else {
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"".to_string()
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};
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let help = format!(
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" {} for further information visit https://lint.deno.land/#{}",
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colors::cyan("help:"),
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diagnostic_code
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);
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format!(
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"{message_line}\n{snippets}\n at {formatted_location}\n\n{hint}{help}",
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message_line = message_line,
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snippets = lines.join("\n"),
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formatted_location = formatted_location,
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hint = hint,
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help = help
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)
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}
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#[derive(Serialize)]
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struct JsonLintReporter {
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diagnostics: Vec<LintDiagnostic>,
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errors: Vec<LintError>,
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}
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impl JsonLintReporter {
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fn new() -> JsonLintReporter {
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JsonLintReporter {
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diagnostics: Vec::new(),
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errors: Vec::new(),
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}
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}
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}
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impl LintReporter for JsonLintReporter {
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fn visit_diagnostic(&mut self, d: &LintDiagnostic, _source_lines: Vec<&str>) {
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self.diagnostics.push(d.clone());
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}
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fn visit_error(&mut self, file_path: &str, err: &AnyError) {
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self.errors.push(LintError {
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file_path: file_path.to_string(),
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message: err.to_string(),
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});
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}
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fn close(&mut self, _check_count: usize) {
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sort_diagnostics(&mut self.diagnostics);
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let json = serde_json::to_string_pretty(&self);
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println!("{}", json.unwrap());
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}
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}
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fn sort_diagnostics(diagnostics: &mut [LintDiagnostic]) {
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// Sort so that we guarantee a deterministic output which is useful for tests
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diagnostics.sort_by(|a, b| {
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use std::cmp::Ordering;
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let file_order = a.filename.cmp(&b.filename);
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match file_order {
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Ordering::Equal => {
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let line_order =
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a.range.start.line_index.cmp(&b.range.start.line_index);
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match line_order {
|
|
Ordering::Equal => {
|
|
a.range.start.column_index.cmp(&b.range.start.column_index)
|
|
}
|
|
_ => line_order,
|
|
}
|
|
}
|
|
_ => file_order,
|
|
}
|
|
});
|
|
}
|
|
|
|
pub fn get_configured_rules(rules: LintRulesConfig) -> Vec<Arc<dyn LintRule>> {
|
|
if rules.tags.is_none() && rules.include.is_none() && rules.exclude.is_none()
|
|
{
|
|
rules::get_recommended_rules()
|
|
} else {
|
|
rules::get_filtered_rules(
|
|
rules.tags.or_else(|| Some(vec!["recommended".to_string()])),
|
|
rules.exclude,
|
|
rules.include,
|
|
)
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
use deno_lint::rules::get_recommended_rules;
|
|
|
|
use super::*;
|
|
use crate::args::LintRulesConfig;
|
|
|
|
#[test]
|
|
fn recommended_rules_when_no_tags_in_config() {
|
|
let rules_config = LintRulesConfig {
|
|
exclude: Some(vec!["no-debugger".to_string()]),
|
|
include: None,
|
|
tags: None,
|
|
};
|
|
let rules = get_configured_rules(rules_config);
|
|
let mut rule_names = rules
|
|
.into_iter()
|
|
.map(|r| r.code().to_string())
|
|
.collect::<Vec<_>>();
|
|
rule_names.sort();
|
|
let mut recommended_rule_names = get_recommended_rules()
|
|
.into_iter()
|
|
.map(|r| r.code().to_string())
|
|
.filter(|n| n != "no-debugger")
|
|
.collect::<Vec<_>>();
|
|
recommended_rule_names.sort();
|
|
assert_eq!(rule_names, recommended_rule_names);
|
|
}
|
|
}
|