feat(linter): add error and warning statistics (#18313)

e2e/angular-core/src/ng-add.test.ts

@@ -411,14 +411,14 @@ describe('convert Angular CLI workspace to an Nx workspace', () => {
 
     let output = runCLI(`lint ${project}`);
     expect(output).toContain(`> nx run ${project}:lint`);
-    expect(output).toContain('All files pass linting.');
+    expect(output).toContain('All files pass linting');
     expect(output).toContain(
       `Successfully ran target lint for project ${project}`
     );
 
     output = runCLI(`lint ${project}`);
     expect(output).toContain(`> nx run ${project}:lint  [local cache]`);
-    expect(output).toContain('All files pass linting.');
+    expect(output).toContain('All files pass linting');
     expect(output).toContain(
       `Successfully ran target lint for project ${project}`
     );

e2e/expo/src/expo.test.ts

@@ -61,10 +61,10 @@ describe('expo', () => {
     expectTestsPass(await runCLIAsync(`test ${libName}`));
 
     const appLintResults = await runCLIAsync(`lint ${appName}`);
-    expect(appLintResults.combinedOutput).toContain('All files pass linting.');
+    expect(appLintResults.combinedOutput).toContain('All files pass linting');
 
     const libLintResults = await runCLIAsync(`lint ${libName}`);
-    expect(libLintResults.combinedOutput).toContain('All files pass linting.');
+    expect(libLintResults.combinedOutput).toContain('All files pass linting');
   });
 
   it('should serve with metro', async () => {

e2e/js/src/js-generators.ts

@@ -54,7 +54,7 @@ describe('js e2e', () => {
     const result = runCLI(`lint ${dirName}-${libName}`);
 
     expect(result).toContain(`Linting "${dirName}-${libName}"...`);
-    expect(result).toContain('All files pass linting.');
+    expect(result).toContain('All files pass linting');
 
     // Test
     const testResult = await runCLIAsync(`test ${dirName}-${libName}`);

e2e/next-core/src/utils.ts

@@ -21,7 +21,7 @@ export async function checkApp(
 
   if (opts.checkLint) {
     const lintResults = runCLI(`lint ${appName}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
   }
 
   if (opts.checkUnitTest) {

e2e/next-extensions/src/utils.ts

@@ -21,7 +21,7 @@ export async function checkApp(
 
   if (opts.checkLint) {
     const lintResults = runCLI(`lint ${appName}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
   }
 
   if (opts.checkUnitTest) {

e2e/node/src/node.test.ts

@@ -65,7 +65,7 @@ describe('Node Applications', () => {
     setMaxWorkers(join('apps', nodeapp, 'project.json'));
 
     const lintResults = runCLI(`lint ${nodeapp}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     updateFile(`apps/${nodeapp}/src/main.ts`, `console.log('Hello World!');`);
     await runCLIAsync(`build ${nodeapp}`);
@@ -100,7 +100,7 @@ describe('Node Applications', () => {
     setMaxWorkers(join('apps', nodeapp, 'project.json'));
 
     const lintResults = runCLI(`lint ${nodeapp}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     updateJson(join('apps', nodeapp, 'project.json'), (config) => {
       config.targets.build.options.additionalEntryPoints = [
@@ -194,7 +194,7 @@ describe('Node Applications', () => {
     runCLI(`generate @nx/express:app ${nodeapp} --linter=eslint`);
     setMaxWorkers(join('apps', nodeapp, 'project.json'));
     const lintResults = runCLI(`lint ${nodeapp}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     updateFile(
       `apps/${nodeapp}/src/app/test.spec.ts`,
@@ -237,7 +237,7 @@ describe('Node Applications', () => {
     setMaxWorkers(join('apps', nestapp, 'project.json'));
 
     const lintResults = runCLI(`lint ${nestapp}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     updateFile(`apps/${nestapp}/src/assets/file.txt`, ``);
     const jestResult = await runCLIAsync(`test ${nestapp}`);
@@ -590,7 +590,7 @@ ${jslib}();
       runCLI(`generate @nx/nest:lib ${nestlib}`);
 
       const lintResults = runCLI(`lint ${nestlib}`);
-      expect(lintResults).toContain('All files pass linting.');
+      expect(lintResults).toContain('All files pass linting');
 
       const testResults = runCLI(`test ${nestlib}`);
       expect(testResults).toContain(
@@ -604,7 +604,7 @@ ${jslib}();
       runCLI(`generate @nx/nest:lib ${nestlib} --service`);
 
       const lintResults = runCLI(`lint ${nestlib}`);
-      expect(lintResults).toContain('All files pass linting.');
+      expect(lintResults).toContain('All files pass linting');
 
       const jestResult = await runCLIAsync(`test ${nestlib}`);
       expect(jestResult.combinedOutput).toContain(
@@ -618,7 +618,7 @@ ${jslib}();
       runCLI(`generate @nx/nest:lib ${nestlib} --controller`);
 
       const lintResults = runCLI(`lint ${nestlib}`);
-      expect(lintResults).toContain('All files pass linting.');
+      expect(lintResults).toContain('All files pass linting');
 
       const jestResult = await runCLIAsync(`test ${nestlib}`);
       expect(jestResult.combinedOutput).toContain(
@@ -632,7 +632,7 @@ ${jslib}();
       runCLI(`generate @nx/nest:lib ${nestlib} --controller --service`);
 
       const lintResults = runCLI(`lint ${nestlib}`);
-      expect(lintResults).toContain('All files pass linting.');
+      expect(lintResults).toContain('All files pass linting');
 
       const jestResult = await runCLIAsync(`test ${nestlib}`);
       expect(jestResult.combinedOutput).toContain(

e2e/plugin/src/nx-plugin.test.ts

@@ -38,7 +38,7 @@ describe('Nx Plugin', () => {
       `generate @nx/plugin:plugin ${plugin} --linter=eslint --e2eTestRunner=jest --publishable`
     );
     const lintResults = runCLI(`lint ${plugin}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     const buildResults = runCLI(`build ${plugin}`);
     expect(buildResults).toContain('Done compiling TypeScript files');
@@ -63,7 +63,7 @@ describe('Nx Plugin', () => {
     );
 
     const lintResults = runCLI(`lint ${plugin}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     expectTestsPass(await runCLIAsync(`test ${plugin}`));
 
@@ -93,7 +93,7 @@ describe('Nx Plugin', () => {
     runCLI(`generate @nx/plugin:generator ${generator} --project=${plugin}`);
 
     const lintResults = runCLI(`lint ${plugin}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     expectTestsPass(await runCLIAsync(`test ${plugin}`));
 
@@ -130,7 +130,7 @@ describe('Nx Plugin', () => {
     );
 
     const lintResults = runCLI(`lint ${plugin}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     expectTestsPass(await runCLIAsync(`test ${plugin}`));
 

e2e/react-core/src/react.test.ts

@@ -218,14 +218,14 @@ describe('React Applications', () => {
     runCLI(`g @nx/react:redux orange --project=${libName} --skipFormat`);
 
     let lintResults = runCLI(`lint ${appName}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
     const appTestResults = await runCLIAsync(`test ${appName}`);
     expect(appTestResults.combinedOutput).toContain(
       'Test Suites: 2 passed, 2 total'
     );
 
     lintResults = runCLI(`lint ${libName}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
     const libTestResults = await runCLIAsync(`test ${libName}`);
     expect(libTestResults.combinedOutput).toContain(
       'Test Suites: 2 passed, 2 total'
@@ -443,7 +443,7 @@ async function testGeneratedApp(
 ) {
   if (opts.checkLinter) {
     const lintResults = runCLI(`lint ${appName}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
   }
 
   runCLI(

e2e/react-native/src/react-native.test.ts

@@ -65,10 +65,10 @@ describe('react native', () => {
     expectTestsPass(await runCLIAsync(`test ${libName}`));
 
     const appLintResults = await runCLIAsync(`lint ${appName}`);
-    expect(appLintResults.combinedOutput).toContain('All files pass linting.');
+    expect(appLintResults.combinedOutput).toContain('All files pass linting');
 
     const libLintResults = await runCLIAsync(`lint ${libName}`);
-    expect(libLintResults.combinedOutput).toContain('All files pass linting.');
+    expect(libLintResults.combinedOutput).toContain('All files pass linting');
   });
 
   it('should run e2e for cypress', async () => {

e2e/web/src/web-vite.test.ts

@@ -24,7 +24,7 @@ describe('Web Components Applications with bundler set as vite', () => {
     setMaxWorkers(join('apps', appName, 'project.json'));
 
     const lintResults = runCLI(`lint ${appName}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     runCLI(`build ${appName}`);
     checkFilesExist(`dist/apps/${appName}/index.html`);
@@ -35,7 +35,7 @@ describe('Web Components Applications with bundler set as vite', () => {
 
     const lintE2eResults = runCLI(`lint ${appName}-e2e`);
 
-    expect(lintE2eResults).toContain('All files pass linting.');
+    expect(lintE2eResults).toContain('All files pass linting');
 
     if (isNotWindows() && runE2ETests()) {
       const e2eResults = runCLI(`e2e ${appName}-e2e --no-watch`);

e2e/web/src/web.test.ts

@@ -33,7 +33,7 @@ describe('Web Components Applications', () => {
     setMaxWorkers(join('apps', appName, 'project.json'));
 
     const lintResults = runCLI(`lint ${appName}`);
-    expect(lintResults).toContain('All files pass linting.');
+    expect(lintResults).toContain('All files pass linting');
 
     const testResults = await runCLIAsync(`test ${appName}`);
 
@@ -42,7 +42,7 @@ describe('Web Components Applications', () => {
     );
     const lintE2eResults = runCLI(`lint ${appName}-e2e`);
 
-    expect(lintE2eResults).toContain('All files pass linting.');
+    expect(lintE2eResults).toContain('All files pass linting');
 
     if (isNotWindows() && runE2ETests()) {
       const e2eResults = runCLI(`e2e ${appName}-e2e --no-watch`);
@@ -110,7 +110,7 @@ describe('Web Components Applications', () => {
 
     const lintE2eResults = runCLI(`lint ${appName}-e2e`);
 
-    expect(lintE2eResults).toContain('All files pass linting.');
+    expect(lintE2eResults).toContain('All files pass linting');
 
     if (isNotWindows() && runE2ETests()) {
       ensurePlaywrightBrowsersInstallation();

packages/eslint/src/executors/lint/lint.impl.spec.ts

@@ -316,11 +316,45 @@ describe('Linter Builder', () => {
         }),
         mockContext
       );
-      expect(console.error).toHaveBeenCalledWith(
-        'Lint errors found in the listed files.\n'
+      expect(console.info).toHaveBeenCalledWith(
+        '✖ 14 problems (4 errors, 10 warnings)\n'
       );
-      expect(console.warn).toHaveBeenCalledWith(
-        'Lint warnings found in the listed files.\n'
+    });
+
+    it('should log fixable errors or warnings', async () => {
+      mockReports = [
+        {
+          errorCount: 2,
+          warningCount: 4,
+          fixableErrorCount: 1,
+          fixableWarningCount: 2,
+          results: [],
+          usedDeprecatedRules: [],
+        },
+        {
+          errorCount: 3,
+          warningCount: 6,
+          fixableErrorCount: 2,
+          fixableWarningCount: 4,
+          results: [],
+          usedDeprecatedRules: [],
+        },
+      ];
+      setupMocks();
+      await lintExecutor(
+        createValidRunBuilderOptions({
+          eslintConfig: './.eslintrc.json',
+          lintFilePatterns: ['includedFile1'],
+          format: 'json',
+          silent: false,
+        }),
+        mockContext
+      );
+      expect(console.info).toHaveBeenCalledWith(
+        '✖ 15 problems (5 errors, 10 warnings)\n'
+      );
+      expect(console.info).toHaveBeenCalledWith(
+        '  3 errors and 6 warnings are potentially fixable with the `--fix` option.\n'
       );
     });
 
@@ -375,13 +409,13 @@ Please see https://nx.dev/guides/eslint for full guidance on how to resolve this
         }),
         mockContext
       );
-      expect(console.error).not.toHaveBeenCalledWith(
-        'Lint errors found in the listed files.\n'
+      expect(console.info).not.toHaveBeenCalledWith(
+        '✖ 0 problems (0 errors, 0 warnings)\n'
       );
-      expect(console.warn).not.toHaveBeenCalledWith(
-        'Lint warnings found in the listed files.\n'
+      expect(console.info).not.toHaveBeenCalledWith(
+        '  0 errors and 0 warnings are potentially fixable with the `--fix` option.\n'
       );
-      expect(console.info).toHaveBeenCalledWith('All files pass linting.\n');
+      expect(console.info).toHaveBeenCalledWith('✔ All files pass linting\n');
     });
 
     it('should not log warnings if the quiet flag was passed', async () => {
@@ -486,11 +520,8 @@ Please see https://nx.dev/guides/eslint for full guidance on how to resolve this
         }),
         mockContext
       );
-      expect(console.error).toHaveBeenCalledWith(
-        'Lint errors found in the listed files.\n'
-      );
-      expect(console.warn).not.toHaveBeenCalledWith(
-        'Lint warnings found in the listed files.\n'
+      expect(console.info).toHaveBeenCalledWith(
+        '✖ 4 problems (4 errors, 0 warnings)\n'
       );
     });
     it('should not log if the silent flag was passed', async () => {
@@ -518,11 +549,8 @@ Please see https://nx.dev/guides/eslint for full guidance on how to resolve this
         }),
         mockContext
       );
-      expect(console.error).not.toHaveBeenCalledWith(
-        'Lint errors found in the listed files.\n'
-      );
-      expect(console.warn).not.toHaveBeenCalledWith(
-        'Lint warnings found in the listed files.\n'
+      expect(console.info).not.toHaveBeenCalledWith(
+        '✖ 14 problems (4 errors, 10 warnings)\n'
       );
     });
   });

packages/eslint/src/executors/lint/lint.impl.ts

@@ -174,16 +174,6 @@ Please see https://nx.dev/guides/eslint for full guidance on how to resolve this
 
   const formatter = await eslint.loadFormatter(normalizedOptions.format);
 
-  let totalErrors = 0;
-  let totalWarnings = 0;
-
-  for (const result of lintResults) {
-    if (result.errorCount || result.warningCount) {
-      totalErrors += result.errorCount;
-      totalWarnings += result.warningCount;
-    }
-  }
-
   const formattedResults = await formatter.format(lintResults);
 
   if (normalizedOptions.outputFile) {
@@ -197,23 +187,71 @@ Please see https://nx.dev/guides/eslint for full guidance on how to resolve this
     console.info(formattedResults);
   }
 
-  if (totalWarnings > 0 && printInfo) {
-    console.warn('Lint warnings found in the listed files.\n');
-  }
+  const totals = getTotals(lintResults);
 
-  if (totalErrors > 0 && printInfo) {
-    console.error('Lint errors found in the listed files.\n');
-  }
-
-  if (totalWarnings === 0 && totalErrors === 0 && printInfo) {
-    console.info('All files pass linting.\n');
+  if (printInfo) {
+    outputPrintInfo(totals);
   }
 
   return {
     success:
       normalizedOptions.force ||
-      (totalErrors === 0 &&
+      (totals.errors === 0 &&
         (normalizedOptions.maxWarnings === -1 ||
-          totalWarnings <= normalizedOptions.maxWarnings)),
+          totals.warnings <= normalizedOptions.maxWarnings)),
   };
 }
+
+function getTotals(lintResults: ESLint.LintResult[]) {
+  let errors = 0;
+  let warnings = 0;
+  let fixableErrors = 0;
+  let fixableWarnings = 0;
+
+  for (const result of lintResults) {
+    errors += result.errorCount || 0;
+    warnings += result.warningCount || 0;
+    fixableErrors += result.fixableErrorCount || 0;
+    fixableWarnings += result.fixableWarningCount || 0;
+  }
+
+  return {
+    errors,
+    warnings,
+    fixableErrors,
+    fixableWarnings,
+  };
+}
+
+function pluralizedOutput(word: string, count: number) {
+  return `${count} ${word}${count === 1 ? '' : 's'}`;
+}
+
+function outputPrintInfo({
+  errors,
+  warnings,
+  fixableErrors,
+  fixableWarnings,
+}: ReturnType<typeof getTotals>) {
+  const total = warnings + errors;
+  const totalFixable = fixableErrors + fixableWarnings;
+
+  if (total <= 0) {
+    console.info('\u2714 All files pass linting\n');
+    return;
+  }
+
+  console.info(
+    `\u2716 ${pluralizedOutput('problem', total)} (${pluralizedOutput(
+      'error',
+      errors
+    )}, ${pluralizedOutput('warning', warnings)})\n`
+  );
+  if (totalFixable <= 0) return;
+  console.info(
+    `  ${pluralizedOutput('error', fixableErrors)} and ${pluralizedOutput(
+      'warning',
+      fixableWarnings
+    )} are potentially fixable with the \`--fix\` option.\n`
+  );
+}