diff --git a/packages/typescript-eslint/src/config-helper.ts b/packages/typescript-eslint/src/config-helper.ts
index 691ffdbab4d8..dd366b70cdbf 100644
--- a/packages/typescript-eslint/src/config-helper.ts
+++ b/packages/typescript-eslint/src/config-helper.ts
@@ -91,14 +91,17 @@ export function config(
return config;
}
- if (config.files) {
- const files = config.files;
- return [
- ...extendsArr.map(conf => ({ ...conf, files: [...files] })),
- config,
- ];
- }
+ const extension = {
+ ...(config.files && { files: config.files }),
+ ...(config.ignores && { ignores: config.ignores }),
+ };
- return [...extendsArr, config];
+ return [
+ ...extendsArr.map(conf => ({
+ ...conf,
+ ...extension,
+ })),
+ config,
+ ];
});
}
diff --git a/packages/typescript-eslint/tests/configs.test.ts b/packages/typescript-eslint/tests/configs.test.ts
index 1b88f58b6e98..f66b638bf1a6 100644
--- a/packages/typescript-eslint/tests/configs.test.ts
+++ b/packages/typescript-eslint/tests/configs.test.ts
@@ -211,3 +211,61 @@ describe('stylistic-type-checked.ts', () => {
itHasBaseRulesOverriden(unfilteredConfigRules);
});
+
+describe('config helper', () => {
+ it('works without extends', () => {
+ expect(
+ plugin.config({
+ files: ['file'],
+ rules: { rule: 'error' },
+ ignores: ['ignored'],
+ }),
+ ).toEqual([
+ {
+ files: ['file'],
+ rules: { rule: 'error' },
+ ignores: ['ignored'],
+ },
+ ]);
+ });
+
+ it('flattens extended configs', () => {
+ expect(
+ plugin.config({
+ rules: { rule: 'error' },
+ extends: [{ rules: { rule1: 'error' } }, { rules: { rule2: 'error' } }],
+ }),
+ ).toEqual([
+ { rules: { rule1: 'error' } },
+ { rules: { rule2: 'error' } },
+ { rules: { rule: 'error' } },
+ ]);
+ });
+
+ it('flattens extended configs with files and ignores', () => {
+ expect(
+ plugin.config({
+ files: ['common-file'],
+ ignores: ['common-ignored'],
+ rules: { rule: 'error' },
+ extends: [{ rules: { rule1: 'error' } }, { rules: { rule2: 'error' } }],
+ }),
+ ).toEqual([
+ {
+ files: ['common-file'],
+ ignores: ['common-ignored'],
+ rules: { rule1: 'error' },
+ },
+ {
+ files: ['common-file'],
+ ignores: ['common-ignored'],
+ rules: { rule2: 'error' },
+ },
+ {
+ files: ['common-file'],
+ ignores: ['common-ignored'],
+ rules: { rule: 'error' },
+ },
+ ]);
+ });
+});
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