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"use strict";
const {
isAbsolute,
join
} = require('path');
const {
isMatch
} = require('micromatch');
const {
getOptions
} = require('./options');
const linter = require('./linter');
const {
arrify,
parseFiles,
parseFoldersToGlobs
} = require('./utils');
/** @typedef {import('webpack').Compiler} Compiler */
/** @typedef {import('./options').Options} Options */
const ESLINT_PLUGIN = 'ESLintWebpackPlugin';
let counter = 0;
class ESLintWebpackPlugin {
/**
* @param {Options} options
*/
constructor(options = {}) {
this.key = ESLINT_PLUGIN;
this.options = getOptions(options);
this.run = this.run.bind(this);
}
/**
* @param {Compiler} compiler
* @returns {void}
*/
apply(compiler) {
// Generate key for each compilation,
// this differentiates one from the other when being cached.
this.key = compiler.name || `${this.key}_${counter += 1}`;
const options = { ...this.options,
exclude: parseFiles(this.options.exclude || [], this.getContext(compiler)),
extensions: arrify(this.options.extensions),
resourceQueryExclude: arrify(this.options.resourceQueryExclude || []).map(item => item instanceof RegExp ? item : new RegExp(item)),
files: parseFiles(this.options.files || '', this.getContext(compiler))
};
const wanted = parseFoldersToGlobs(options.files, options.extensions);
const exclude = parseFoldersToGlobs(this.options.exclude ? options.exclude : '**/node_modules/**', []); // If `lintDirtyModulesOnly` is disabled,
// execute the linter on the build
if (!this.options.lintDirtyModulesOnly) {
compiler.hooks.run.tapPromise(this.key, c => this.run(c, options, wanted, exclude));
}
let isFirstRun = this.options.lintDirtyModulesOnly;
compiler.hooks.watchRun.tapPromise(this.key, c => {
if (isFirstRun) {
isFirstRun = false;
return Promise.resolve();
}
return this.run(c, options, wanted, exclude);
});
}
/**
* @param {Compiler} compiler
* @param {Omit<Options, 'resourceQueryExclude'> & {resourceQueryExclude: RegExp[]}} options
* @param {string[]} wanted
* @param {string[]} exclude
*/
async run(compiler, options, wanted, exclude) {
// Do not re-hook
if ( // @ts-ignore
compiler.hooks.compilation.taps.find(({
name
}) => name === this.key)) {
return;
}
compiler.hooks.compilation.tap(this.key, compilation => {
/** @type {import('./linter').Linter} */
let lint;
/** @type {import('./linter').Reporter} */
let report;
/** @type number */
let threads;
try {
({
lint,
report,
threads
} = linter(this.key, options, compilation));
} catch (e) {
compilation.errors.push(e);
return;
}
/** @type {string[]} */
const files = []; // @ts-ignore
// Add the file to be linted
compilation.hooks.succeedModule.tap(this.key, ({
resource
}) => {
if (resource) {
const [file, query] = resource.split('?');
if (file && !files.includes(file) && isMatch(file, wanted, {
dot: true
}) && !isMatch(file, exclude, {
dot: true
}) && options.resourceQueryExclude.every(reg => !reg.test(query))) {
files.push(file);
if (threads > 1) {
lint(file);
}
}
}
}); // Lint all files added
compilation.hooks.finishModules.tap(this.key, () => {
if (files.length > 0 && threads <= 1) {
lint(files);
}
}); // await and interpret results
compilation.hooks.additionalAssets.tapPromise(this.key, processResults);
async function processResults() {
const {
errors,
warnings,
generateReportAsset
} = await report();
if (warnings && !options.failOnWarning) {
// @ts-ignore
compilation.warnings.push(warnings);
} else if (warnings && options.failOnWarning) {
// @ts-ignore
compilation.errors.push(warnings);
}
if (errors && options.failOnError) {
// @ts-ignore
compilation.errors.push(errors);
} else if (errors && !options.failOnError) {
// @ts-ignore
compilation.warnings.push(errors);
}
if (generateReportAsset) {
await generateReportAsset(compilation);
}
}
});
}
/**
*
* @param {Compiler} compiler
* @returns {string}
*/
getContext(compiler) {
if (!this.options.context) {
return String(compiler.options.context);
}
if (!isAbsolute(this.options.context)) {
return join(String(compiler.options.context), this.options.context);
}
return this.options.context;
}
}
module.exports = ESLintWebpackPlugin;