fix: migrate .eslintrc file

Signed-off-by: dhmlau <dhmlau@ca.ibm.com>

.eslintignore

@@ -1 +0,0 @@
-**/node_modules/

.eslintrc

@@ -1,13 +0,0 @@
-{
-   "extends": "loopback",
-   "rules": {
-     "max-len": ["error", 120, 4, {
-       "ignoreComments": true,
-       "ignoreUrls": true,
-       "ignorePattern": "^\\s*var\\s.=\\s*(require\\s*\\()|(/)"
-     }],
-     "camelcase": 0,
-     "one-var": "off",
-     "no-unused-expressions": "off"
-   }
- }

eslint.config.mjs

@@ -0,0 +1,29 @@
+import { defineConfig, globalIgnores } from "eslint/config";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended,
+    allConfig: js.configs.all
+});
+
+export default defineConfig([globalIgnores(["**/node_modules/"]), {
+    extends: compat.extends("loopback"),
+
+    rules: {
+        "max-len": ["error", 120, 4, {
+            ignoreComments: true,
+            ignoreUrls: true,
+            ignorePattern: "^\\s*var\\s.=\\s*(require\\s*\\()|(/)",
+        }],
+
+        camelcase: 0,
+        "one-var": "off",
+        "no-unused-expressions": "off",
+    },
+}]);

package-lock.json

@@ -20,6 +20,8 @@
       },
       "devDependencies": {
         "@commitlint/config-conventional": "^19.8.0",
+        "@eslint/eslintrc": "^3.3.0",
+        "@eslint/js": "^9.22.0",
         "eslint": "^9.22.0",
         "eslint-config-loopback": "^13.1.0",
         "loopback-datasource-juggler": "^5.1.6",
@@ -149,7 +151,6 @@
       "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-3.3.0.tgz",
       "integrity": "sha512-yaVPAiNAalnCZedKLdR21GOGILMLKPyqSLWaAjQFvYA2i/ciDi8ArYVr69Anohb6cH2Ukhqti4aFnYyPm8wdwQ==",
       "dev": true,
-      "license": "MIT",
       "dependencies": {
         "ajv": "^6.12.4",
         "debug": "^4.3.2",
@@ -173,7 +174,6 @@
       "resolved": "https://registry.npmjs.org/@eslint/js/-/js-9.22.0.tgz",
       "integrity": "sha512-vLFajx9o8d1/oL2ZkpMYbkLv8nDB6yaIwFNt7nI4+I80U/z03SxmfOMsLbvWr3p7C+Wnoh//aOu2pQW8cS0HCQ==",
       "dev": true,
-      "license": "MIT",
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }

package.json

@@ -31,6 +31,8 @@
   },
   "devDependencies": {
     "@commitlint/config-conventional": "^19.8.0",
+    "@eslint/eslintrc": "^3.3.0",
+    "@eslint/js": "^9.22.0",
     "eslint": "^9.22.0",
     "eslint-config-loopback": "^13.1.0",
     "loopback-datasource-juggler": "^5.1.6",