update eslint, migrate to flat config, fix #28

eslint.config.mjs

@@ -0,0 +1,128 @@
+import stylisticTs from "@stylistic/eslint-plugin-ts";
+import tseslint from "typescript-eslint";
+
+export default tseslint.config(
+  {
+    files: ["**/*.ts"],
+    plugins: {
+      "@stylistic": stylisticTs,
+      "@typescript-eslint": tseslint.plugin
+    },
+    languageOptions: {
+      parser: tseslint.parser,
+      ecmaVersion: "latest",
+      sourceType: "commonjs",
+    }
+  },
+  { // Base rules
+    rules: {
+      "@typescript-eslint/explicit-function-return-type": ["warn", {
+        allowExpressions: true,
+      }],
+      "@typescript-eslint/explicit-member-accessibility": "warn",
+      "@typescript-eslint/member-ordering": ["warn", {
+        classes: [
+          "public-static-field",
+          "protected-static-field",
+          "private-static-field",
+          "#private-static-field",
+          "public-instance-field",
+          "protected-instance-field",
+          "private-instance-field",
+          "#private-instance-field",
+          "public-abstract-field",
+          "protected-abstract-field",
+          "public-constructor",
+          "protected-constructor",
+          "private-constructor",
+          ["public-static-get", "public-static-set"],
+          ["protected-static-get", "protected-static-set"],
+          ["private-static-get", "private-static-set"],
+          ["#private-static-get", "#private-static-set"],
+          "public-static-method",
+          "protected-static-method",
+          "private-static-method",
+          "#private-static-method",
+          ["public-instance-get", "public-instance-set"],
+          ["protected-instance-get", "protected-instance-set"],
+          ["private-instance-get", "private-instance-set"],
+          ["#private-instance-get", "#private-instance-set"],
+          "public-instance-method",
+          "protected-instance-method",
+          "private-instance-method",
+          "#private-instance-method",
+          "public-abstract-method",
+          "protected-abstract-method",
+        ],
+      }],
+      "@typescript-eslint/naming-convention": ["warn",
+        {
+          selector: ["classProperty", "classMethod", "accessor"],
+          format: ["camelCase"],
+        }, {
+          selector: ["classProperty", "classMethod"],
+          modifiers: ["static"],
+          format: ["camelCase", "UPPER_CASE"],
+        }, {
+          selector: ["variable", "function"],
+          format: ["camelCase", "UPPER_CASE"],
+        }, {
+          selector: "parameter",
+          format: ["camelCase"],
+
+          filter: {
+            regex: "^this$",
+            match: false,
+          },
+
+          leadingUnderscore: "require",
+        }, {
+          selector: ["enum", "enumMember"],
+          format: ["UPPER_CASE"],
+        }, {
+          selector: ["interface", "class"],
+          format: ["PascalCase"],
+        }
+      ],
+      "@typescript-eslint/no-empty-function": "warn",
+      "@typescript-eslint/no-explicit-any": "warn",
+      "@typescript-eslint/no-unused-expressions": "warn",
+      "@typescript-eslint/typedef": ["warn", {
+        parameter: true,
+        propertyDeclaration: true,
+        variableDeclaration: true,
+        variableDeclarationIgnoreFunction: true,
+        memberVariableDeclaration: true,
+      }],
+      "no-cond-assign": "warn",
+      "no-empty": "warn",
+      "no-eval": "warn",
+      "no-new-wrappers": "warn",
+      "no-unused-labels": "warn",
+    }
+  },
+  { // Stylistic rules
+    rules: {
+      "@stylistic/brace-style": ["warn", "1tbs", { allowSingleLine: true, }],
+      "@stylistic/comma-dangle": "warn",
+      "@stylistic/indent": ["warn", 2, {
+        SwitchCase: 1,
+
+        CallExpression: {
+          arguments: "first",
+        },
+
+        FunctionDeclaration: {
+          parameters: "first",
+        },
+
+        FunctionExpression: {
+          parameters: "first",
+        },
+      }],
+      "@stylistic/member-delimiter-style": "warn",
+      "@stylistic/semi": "warn",
+      "@stylistic/type-annotation-spacing": "warn",
+    }
+  }
+);