mirror of
https://github.com/denoland/deno.git
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577 lines
15 KiB
Rust
577 lines
15 KiB
Rust
// Copyright 2018-2021 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::config_file::LintConfig;
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use crate::file_watcher::ResolutionResult;
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use crate::flags::LintFlags;
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use crate::fmt_errors;
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use crate::fs_util::{collect_files, is_supported_ext, specifier_to_file_path};
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use crate::tools::fmt::run_parallelized;
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use crate::{colors, file_watcher};
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use deno_ast::MediaType;
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use deno_core::anyhow::anyhow;
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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 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, Read};
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use std::path::PathBuf;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::sync::{Arc, Mutex};
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static STDIN_FILE_NAME: &str = "_stdin.ts";
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#[derive(Clone, Debug)]
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pub enum LintReporterKind {
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Pretty,
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Json,
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}
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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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}
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}
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pub async fn lint(
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maybe_lint_config: Option<LintConfig>,
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lint_flags: LintFlags,
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watch: bool,
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) -> Result<(), AnyError> {
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let LintFlags {
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maybe_rules_tags,
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maybe_rules_include,
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maybe_rules_exclude,
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files: args,
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ignore,
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json,
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..
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} = lint_flags;
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// First, prepare final configuration.
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// Collect included and ignored files. CLI flags take precendence
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// over config file, ie. if there's `files.ignore` in config file
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// and `--ignore` CLI flag, only the flag value is taken into account.
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let mut include_files = args.clone();
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let mut exclude_files = ignore.clone();
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if let Some(lint_config) = maybe_lint_config.as_ref() {
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if include_files.is_empty() {
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include_files = lint_config
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.files
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.include
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.iter()
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.filter_map(|s| specifier_to_file_path(s).ok())
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.collect::<Vec<_>>();
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}
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if exclude_files.is_empty() {
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exclude_files = lint_config
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.files
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.exclude
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.iter()
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.filter_map(|s| specifier_to_file_path(s).ok())
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.collect::<Vec<_>>();
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}
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}
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if include_files.is_empty() {
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include_files = [std::env::current_dir()?].to_vec();
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}
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let reporter_kind = if json {
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LintReporterKind::Json
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} else {
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LintReporterKind::Pretty
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};
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let has_error = Arc::new(AtomicBool::new(false));
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// Try to get configured rules. CLI flags take precendence
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// over config file, ie. if there's `rules.include` in config file
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// and `--rules-include` CLI flag, only the flag value is taken into account.
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let lint_rules = get_configured_rules(
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maybe_lint_config.as_ref(),
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maybe_rules_tags,
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maybe_rules_include,
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maybe_rules_exclude,
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)?;
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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 =
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collect_files(&include_files, &exclude_files, is_supported_ext).map(
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|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(|| 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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);
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let paths_to_watch = include_files.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 operation = |paths: Vec<PathBuf>| async {
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let target_files_len = paths.len();
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let reporter_kind = reporter_kind.clone();
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let reporter_lock = Arc::new(Mutex::new(create_reporter(reporter_kind)));
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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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move |file_path| {
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let r = lint_file(file_path.clone(), lint_rules.clone());
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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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reporter_lock.lock().unwrap().close(target_files_len);
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Ok(())
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};
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if watch {
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if args.len() == 1 && args[0].to_string_lossy() == "-" {
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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(resolver, operation, "Lint").await?;
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} else {
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if args.len() == 1 && args[0].to_string_lossy() == "-" {
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let reporter_lock =
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Arc::new(Mutex::new(create_reporter(reporter_kind.clone())));
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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 =
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collect_files(&include_files, &exclude_files, is_supported_ext)
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.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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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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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 source_code = fs::read_to_string(&file_path)?;
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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.clone(),
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d.hint.as_ref(),
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&fmt_errors::format_location(&JsStackFrame::from_location(
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Some(d.filename.clone()),
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Some(d.range.start.line_index as i64 + 1), // 1-indexed
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// todo(#11111): make 1-indexed as well
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Some(d.range.start.column_index as i64),
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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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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 Vec<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 {
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Ordering::Equal => {
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a.range.start.column_index.cmp(&b.range.start.column_index)
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}
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_ => line_order,
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}
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}
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_ => file_order,
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}
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});
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}
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pub(crate) fn get_configured_rules(
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maybe_lint_config: Option<&LintConfig>,
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maybe_rules_tags: Option<Vec<String>>,
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maybe_rules_include: Option<Vec<String>>,
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maybe_rules_exclude: Option<Vec<String>>,
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) -> Result<Vec<Arc<dyn LintRule>>, AnyError> {
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if maybe_lint_config.is_none()
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&& maybe_rules_tags.is_none()
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&& maybe_rules_include.is_none()
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&& maybe_rules_exclude.is_none()
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{
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return Ok(rules::get_recommended_rules());
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}
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let (config_file_tags, config_file_include, config_file_exclude) =
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if let Some(lint_config) = maybe_lint_config {
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(
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lint_config.rules.tags.clone(),
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lint_config.rules.include.clone(),
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lint_config.rules.exclude.clone(),
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)
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} else {
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(None, None, None)
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};
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let maybe_configured_include = if maybe_rules_include.is_some() {
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maybe_rules_include
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} else {
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config_file_include
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};
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let maybe_configured_exclude = if maybe_rules_exclude.is_some() {
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maybe_rules_exclude
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} else {
|
|
config_file_exclude
|
|
};
|
|
|
|
let maybe_configured_tags = if maybe_rules_tags.is_some() {
|
|
maybe_rules_tags
|
|
} else {
|
|
config_file_tags
|
|
};
|
|
|
|
let configured_rules = rules::get_filtered_rules(
|
|
maybe_configured_tags.or_else(|| Some(vec!["recommended".to_string()])),
|
|
maybe_configured_exclude,
|
|
maybe_configured_include,
|
|
);
|
|
|
|
if configured_rules.is_empty() {
|
|
anyhow!("No rules have been configured");
|
|
}
|
|
|
|
Ok(configured_rules)
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
use deno_lint::rules::get_recommended_rules;
|
|
|
|
use super::*;
|
|
use crate::config_file::LintRulesConfig;
|
|
|
|
#[test]
|
|
fn recommended_rules_when_no_tags_in_config() {
|
|
let lint_config = LintConfig {
|
|
rules: LintRulesConfig {
|
|
exclude: Some(vec!["no-debugger".to_string()]),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
};
|
|
let rules =
|
|
get_configured_rules(Some(&lint_config), None, None, None).unwrap();
|
|
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);
|
|
}
|
|
}
|