test: utilize new flat ESLint configuration (#294)

* test: utilize new flat ESLint configuration

* test: add TypeScript support to new flat ESLint config

* test: fix `@typescript-eslint/consistent-indexed-object-style` lint issue

.eslintrc.json

@@ -1,10 +0,0 @@
-{
-  "root": true,
-  "extends": ["eslint:recommended"],
-  "overrides": [
-    {
-      "files": ["**/*.ts"],
-      "extends": ["plugin:@typescript-eslint/recommended"]
-    }
-  ]
-}

.gitignore

@@ -1,6 +1,5 @@
 .*
 !.env.yarn
-!.eslint*
 !.git*
 
 node_modules/

eslint.config.js

@@ -0,0 +1,11 @@
+import eslint from "@eslint/js";
+import tseslint from "typescript-eslint";
+
+export default [
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  ...tseslint.configs.stylistic,
+  {
+    ignores: [".*", "dist"],
+  },
+];

package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "build": "ncc build src/index.ts",
     "format": "prettier --write --cache . !dist !README.md",
-    "lint": "eslint src",
+    "lint": "eslint .",
     "test": "jest"
   },
   "dependencies": {
@@ -13,17 +13,17 @@
     "@actions/exec": "^1.1.1"
   },
   "devDependencies": {
+    "@eslint/js": "^9.0.0",
     "@jest/globals": "^29.7.0",
     "@types/jest": "^29.5.12",
     "@types/node": "^20.11.30",
-    "@typescript-eslint/eslint-plugin": "^7.6.0",
-    "@typescript-eslint/parser": "^7.6.0",
     "@vercel/ncc": "^0.38.1",
     "eslint": "^8.57.0",
     "jest": "^29.7.0",
     "prettier": "^3.2.5",
     "ts-jest": "^29.1.2",
-    "typescript": "^5.4.5"
+    "typescript": "^5.4.5",
+    "typescript-eslint": "^7.6.0"
   },
   "packageManager": "yarn@4.1.1"
 }

src/inputs.test.ts

@@ -11,9 +11,9 @@ jest.unstable_mockModule("@actions/core", () => ({
 describe("get action inputs", () => {
   interface TestCase {
     name: string;
-    booleanInputs?: { [key: string]: boolean };
-    stringInputs?: { [key: string]: string };
-    multilineInputs?: { [key: string]: string[] };
+    booleanInputs?: Record<string, boolean>;
+    stringInputs?: Record<string, string>;
+    multilineInputs?: Record<string, string[]>;
     expectedInputs?: Partial<Inputs>;
   }
 

yarn.lock

@@ -493,6 +493,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@eslint/js@npm:^9.0.0":
+  version: 9.0.0
+  resolution: "@eslint/js@npm:9.0.0"
+  checksum: 10c0/ec3242a60a2525d2785d96d1e95b8060235f47f3b953aa81626968591ef8c1eb4f7f8b3647db2c97fdfa524eace949a5695be50521f64b8dcc4ed3b493ee409e
+  languageName: node
+  linkType: hard
+
 "@fastify/busboy@npm:^2.0.0":
   version: 2.1.0
   resolution: "@fastify/busboy@npm:2.1.0"
@@ -1052,7 +1059,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@typescript-eslint/eslint-plugin@npm:^7.6.0":
+"@typescript-eslint/eslint-plugin@npm:7.6.0":
   version: 7.6.0
   resolution: "@typescript-eslint/eslint-plugin@npm:7.6.0"
   dependencies:
@@ -1077,7 +1084,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@typescript-eslint/parser@npm:^7.6.0":
+"@typescript-eslint/parser@npm:7.6.0":
   version: 7.6.0
   resolution: "@typescript-eslint/parser@npm:7.6.0"
   dependencies:
@@ -3866,17 +3873,17 @@ __metadata:
   dependencies:
     "@actions/core": "npm:^1.10.1"
     "@actions/exec": "npm:^1.1.1"
+    "@eslint/js": "npm:^9.0.0"
     "@jest/globals": "npm:^29.7.0"
     "@types/jest": "npm:^29.5.12"
     "@types/node": "npm:^20.11.30"
-    "@typescript-eslint/eslint-plugin": "npm:^7.6.0"
-    "@typescript-eslint/parser": "npm:^7.6.0"
     "@vercel/ncc": "npm:^0.38.1"
     eslint: "npm:^8.57.0"
     jest: "npm:^29.7.0"
     prettier: "npm:^3.2.5"
     ts-jest: "npm:^29.1.2"
     typescript: "npm:^5.4.5"
+    typescript-eslint: "npm:^7.6.0"
   languageName: unknown
   linkType: soft
 
@@ -4276,6 +4283,22 @@ __metadata:
   languageName: node
   linkType: hard
 
+"typescript-eslint@npm:^7.6.0":
+  version: 7.6.0
+  resolution: "typescript-eslint@npm:7.6.0"
+  dependencies:
+    "@typescript-eslint/eslint-plugin": "npm:7.6.0"
+    "@typescript-eslint/parser": "npm:7.6.0"
+    "@typescript-eslint/utils": "npm:7.6.0"
+  peerDependencies:
+    eslint: ^8.56.0
+  peerDependenciesMeta:
+    typescript:
+      optional: true
+  checksum: 10c0/1950ae59069860cc802de9c1c4f15013099b677b47cabc8dc24200dbe9a4a5a3db5ff9b88e6813658b089e16294d75835b6c17d13a445cf29c954a71eb27ff6f
+  languageName: node
+  linkType: hard
+
 "typescript@npm:^5.4.5":
   version: 5.4.5
   resolution: "typescript@npm:5.4.5"