Fix issue of ESLint.calculateConfigForFile

Author: ygysn

packages/eslint-config-airbnb-base/whitespace-flat-async.js

@@ -25,7 +25,7 @@ async function onlyErrorOnRules(rulesToError, config) {
     rules: config[config.length - 1].rules || {},
   };
   const cli = new ESLint({ baseConfig: config });
-  const baseRules = (await cli.calculateConfigForFile(require.resolve('./'))).rules;
+  const baseRules = (await cli.calculateConfigForFile(require.resolve('./flat'))).rules;
 
   entries(baseRules).forEach((rule) => {
     const ruleName = rule[0];

packages/eslint-config-airbnb-base/whitespace-flat.js

@@ -5,6 +5,7 @@ const { execSync } = require('child_process');
 
 // NOTE: ESLint adds runtime statistics to the output (so it's no longer JSON) if TIMING is set
 module.exports = JSON.parse(String(execSync(path.join(__dirname, 'whitespace-flat-async.js'), {
+  cwd: __dirname, // NOTE: cwd is set to prevent ESLint.calculateConfigForFile return {}
   env: {
     ...process.env,
     TIMING: undefined,

packages/eslint-config-airbnb/whitespace-flat-async.js

@@ -25,7 +25,7 @@ async function onlyErrorOnRules(rulesToError, config) {
     rules: config.rules || {},
   };
   const cli = new ESLint({ baseConfig: config });
-  const baseRules = (await cli.calculateConfigForFile(require.resolve('./'))).rules;
+  const baseRules = (await cli.calculateConfigForFile(require.resolve('./flat'))).rules;
 
   entries(baseRules).forEach((rule) => {
     const ruleName = rule[0];

packages/eslint-config-airbnb/whitespace-flat.js

@@ -5,6 +5,7 @@ const { execSync } = require('child_process');
 
 // NOTE: ESLint adds runtime statistics to the output (so it's no longer JSON) if TIMING is set
 module.exports = JSON.parse(String(execSync(path.join(__dirname, 'whitespace-flat-async.js'), {
+  cwd: __dirname, // NOTE: cwd is set to prevent ESLint.calculateConfigForFile return {}
   env: {
     ...process.env,
     TIMING: undefined,