Migrated EsLint to new format

eslint.config.mjs

@@ -0,0 +1,102 @@
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import globals from "globals";
+import tsParser from "@typescript-eslint/parser";
+import parser from "svelte-eslint-parser";
+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 [{
+    ignores: [
+        "**/.DS_Store",
+        "**/node_modules",
+        "build",
+        ".svelte-kit",
+        "package",
+        "**/.env",
+        "**/.env.*",
+        "!**/.env.example",
+        ".vscode",
+        "src/translations/paraglide",
+        "**/pnpm-lock.yaml",
+        "**/package-lock.json",
+        "**/yarn.lock",
+    ],
+}, ...compat.extends(
+    "eslint:recommended",
+    "plugin:eslint-comments/recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:@typescript-eslint/stylistic",
+    "plugin:svelte/recommended",
+    "plugin:svelte/prettier",
+    "prettier",
+), {
+    plugins: {
+        "@typescript-eslint": typescriptEslint,
+    },
+
+    linterOptions: {
+        reportUnusedDisableDirectives: true,
+    },
+
+    languageOptions: {
+        globals: {
+            ...globals.browser,
+            ...globals.node,
+        },
+
+        parser: tsParser,
+        ecmaVersion: 2020,
+        sourceType: "module",
+
+        parserOptions: {
+            extraFileExtensions: [".svelte"],
+        },
+    },
+
+    rules: {
+        "eslint-comments/require-description": "warn",
+
+        "no-restricted-imports": ["warn", {
+            patterns: [{
+                group: ["../**/*[a-zA-Z0-9_-]*/*"],
+                message: "\nIt looks like you're importing from a different subtree. Consider whether the imported code should really be shared. Suggestions:\n1) Write new code specific to your usage.\n2) Move the imported code to a shared location, e.g. a parent folder.\n3) Verify that you're using the correct path alias, e.g. $lib.",
+            }, {
+                importNamePattern: "^(goto|redirect)",
+                group: ["$app/navigation", "sveltekit-flash-message/server", "@sveltejs/kit"],
+                message: "Use the goto and redirect wrappers from $lib/utils/redirect instead",
+            }, {
+                importNamePattern: "^(superForm)",
+                group: ["sveltekit-superforms", "sveltekit-superforms/client"],
+                message: "Use the superForm from $lib/utils/client/superForms instead",
+            }],
+        }],
+
+        "@typescript-eslint/consistent-type-definitions": "off",
+
+        "@typescript-eslint/array-type": ["error", {
+            default: "array-simple",
+        }],
+    },
+}, {
+    files: ["**/*.svelte"],
+
+    languageOptions: {
+        parser: parser,
+        ecmaVersion: 5,
+        sourceType: "script",
+
+        parserOptions: {
+            parser: "@typescript-eslint/parser",
+        },
+    },
+}];

package.json

@@ -39,6 +39,8 @@
   },
   "devDependencies": {
     "@clack/prompts": "^0.7.0",
+    "@eslint/eslintrc": "^3.2.0",
+    "@eslint/js": "^9.15.0",
     "@event-calendar/core": "^3.6.2",
     "@event-calendar/resource-timeline": "^3.6.2",
     "@faker-js/faker": "^9.2.0",
@@ -69,6 +71,7 @@
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-eslint-comments": "^3.2.0",
     "eslint-plugin-svelte": "^2.46.0",
+    "globals": "^15.12.0",
     "husky": "^9.1.6",
     "postcss": "^8.4.47",
     "postcss-import": "^16.1.0",