fix: handle absolute paths for the eslint.files option (#419)

✅ Closes: #414

src/eslint-reporter/EsLintReporterConfiguration.ts

@@ -1,4 +1,5 @@
 import webpack from 'webpack';
+import { isAbsolute, join } from 'path';
 import { EsLintReporterOptions } from './EsLintReporterOptions';
 import { CLIEngineOptions } from './types/eslint';
 
@@ -7,7 +8,6 @@ interface EsLintReporterConfiguration {
   memoryLimit: number;
   options: CLIEngineOptions;
   files: string[];
-  cwd: string;
 }
 
 function castToArray<T>(value: T | T[] | undefined): T[] {
@@ -28,8 +28,12 @@ function createEsLintReporterConfiguration(
     enabled: !!(options && options.enabled === true),
     memoryLimit: 2048,
     ...(typeof options === 'object' ? options : {}),
-    files: typeof options === 'object' ? castToArray(options.files) : [],
-    cwd: compiler.options.context || process.cwd(),
+    files: (typeof options === 'object' ? castToArray(options.files) : []).map((filesPattern) =>
+      // ensure that `filesPattern` is an absolute path
+      isAbsolute(filesPattern)
+        ? filesPattern
+        : join(compiler.options.context || process.cwd(), filesPattern)
+    ),
     options: {
       cwd: compiler.options.context || process.cwd(),
       extensions: ['.js', '.ts', '.tsx'],

src/eslint-reporter/reporter/EsLintReporter.ts

@@ -4,7 +4,6 @@ import { createIssuesFromEsLintResults } from '../issue/EsLintIssueFactory';
 import { EsLintReporterConfiguration } from '../EsLintReporterConfiguration';
 import { Reporter } from '../../reporter';
 import minimatch from 'minimatch';
-import { join } from 'path';
 
 function createEsLintReporter(configuration: EsLintReporterConfiguration): Reporter {
   // eslint-disable-next-line @typescript-eslint/no-var-requires
@@ -34,7 +33,7 @@ function createEsLintReporter(configuration: EsLintReporterConfiguration): Repor
       } else {
         const changedAndIncludedFiles = changedFiles.filter((changedFile) =>
           includedFilesPatterns.some((includedFilesPattern) =>
-            minimatch(changedFile, join(configuration.cwd, includedFilesPattern))
+            minimatch(changedFile, includedFilesPattern)
           )
         );
 

test/e2e/EsLint.spec.ts

@@ -23,11 +23,11 @@ describe('EsLint', () => {
   });
 
   it.each([
-    { async: false, webpack: '4.0.0' },
-    { async: true, webpack: '^4.0.0' },
-    { async: false, webpack: '^5.0.0-beta.16' },
-    { async: true, webpack: '^5.0.0-beta.16' },
-  ])('reports lint error for %p', async ({ async, webpack }) => {
+    { async: false, webpack: '4.0.0', absolute: false },
+    { async: true, webpack: '^4.0.0', absolute: true },
+    { async: false, webpack: '^5.0.0-beta.16', absolute: true },
+    { async: true, webpack: '^5.0.0-beta.16', absolute: false },
+  ])('reports lint error for %p', async ({ async, webpack, absolute }) => {
     await sandbox.load([
       await readFixture(join(__dirname, 'fixtures/environment/eslint-basic.fixture'), {
         FORK_TS_CHECKER_WEBPACK_PLUGIN_VERSION: JSON.stringify(
@@ -43,6 +43,15 @@ describe('EsLint', () => {
       await readFixture(join(__dirname, 'fixtures/implementation/typescript-basic.fixture')),
     ]);
 
+    if (absolute) {
+      // test case for providing absolute path to files
+      await sandbox.patch(
+        'webpack.config.js',
+        "files: './src/**/*.ts'",
+        "files: path.resolve(__dirname, './src/**/*.ts')"
+      );
+    }
+
     const driver = createWebpackDevServerDriver(sandbox.spawn('npm run webpack-dev-server'), async);
     let errors: string[];
 
@@ -92,34 +101,34 @@ describe('EsLint', () => {
 
     // add a new error
     await sandbox.patch(
-      'src/index.ts',
-      "let password = '';",
-      "let password = ''\nlet temporary: any;"
+      'src/model/User.ts',
+      ['  lastName?: string;', '}'].join('\n'),
+      ['  lastName?: string;', '}', '', 'let temporary: any;', ''].join('\n')
     );
 
     errors = await driver.waitForErrors();
     expect(errors).toEqual([
       [
-        'WARNING in src/index.ts 20:5-19',
+        'WARNING in src/model/User.ts 11:5-19',
         "@typescript-eslint/no-unused-vars: 'temporary' is defined but never used.",
-        "    18 | let email = '';",
-        "    19 | let password = ''",
-        '  > 20 | let temporary: any;',
+        '     9 | }',
+        '    10 | ',
+        '  > 11 | let temporary: any;',
         '       |     ^^^^^^^^^^^^^^',
-        '    21 | ',
-        "    22 | emailInput.addEventListener('change', event => {",
-        '    23 |   if (event.target instanceof HTMLInputElement) {',
+        '    12 | ',
+        '    13 | ',
+        '    14 | function getUserName(user: User): string {',
       ].join('\n'),
       [
-        'WARNING in src/index.ts 20:16-19',
+        'WARNING in src/model/User.ts 11:16-19',
         '@typescript-eslint/no-explicit-any: Unexpected any. Specify a different type.',
-        "    18 | let email = '';",
-        "    19 | let password = ''",
-        '  > 20 | let temporary: any;',
+        '     9 | }',
+        '    10 | ',
+        '  > 11 | let temporary: any;',
         '       |                ^^^',
-        '    21 | ',
-        "    22 | emailInput.addEventListener('change', event => {",
-        '    23 |   if (event.target instanceof HTMLInputElement) {',
+        '    12 | ',
+        '    13 | ',
+        '    14 | function getUserName(user: User): string {',
       ].join('\n'),
     ]);
   });

test/e2e/sandbox/Sandbox.ts

@@ -94,13 +94,14 @@ async function createSandbox(): Promise<Sandbox> {
         process.stdout.write(`Killing child process ${childProcess.pid}...\n`);
         await retry(
           () =>
-            new Promise((resolve, reject) =>
+            new Promise((resolve) =>
               kill(childProcess.pid, 'SIGKILL', (error) => {
                 if (error) {
-                  reject(error);
-                } else {
-                  resolve();
+                  // we don't want to reject as it's probably some OS issue
+                  // or already killed process
+                  console.error(error);
                 }
+                resolve();
               })
             )
         );