Setup ESLint

.eslintrc

@@ -0,0 +1,40 @@
+{
+    "root": true,
+    "parser": "@typescript-eslint/parser",
+    "plugins": ["@typescript-eslint"],
+    "env": {
+      "node": true
+    },
+    "extends": [
+      "eslint:recommended",
+      "plugin:@typescript-eslint/recommended"
+    ],
+    "rules": {
+      "arrow-body-style": ["error", "as-needed"],
+      "complexity": ["warn", { "max": 20 }],
+      "curly": ["error", "multi-line", "consistent"],
+      "eqeqeq": ["error", "smart"],
+      "no-constant-condition": ["error", { "checkLoops": false }],
+      "no-empty": ["error", { "allowEmptyCatch": true }],
+      "no-lonely-if": "error",
+      "no-var": "error",
+      "object-shorthand": "error",
+      "one-var": ["error", { "var": "never", "let": "never" }],
+      "prefer-arrow-callback": "error",
+      "prefer-const": ["error", { "destructuring": "all" }],
+      "prefer-object-spread": "error",
+      "prefer-rest-params": "warn",
+      "prefer-spread": "warn",
+      "quote-props": ["error", "consistent-as-needed"],
+      "quotes": "error",
+      "spaced-comment": ["error", "always", { "markers": ["/"] }],
+      "yoda": ["error", "never", { "exceptRange": true }],
+      "@typescript-eslint/no-empty-function": ["error", { "allow": ["arrowFunctions"] }],
+      "@typescript-eslint/no-namespace": "off",
+      "@typescript-eslint/no-explicit-any": "off",
+      "@typescript-eslint/no-unused-vars": ["error", {
+        "varsIgnorePattern": "^_",
+        "argsIgnorePattern": "^_"
+      }]
+    }
+  }

package.json

@@ -5,6 +5,7 @@
   "main": "src/index.ts",
   "scripts": {
     "build": "ncc build --source-map --license license.txt",
+    "test:lint": "eslint src/** && eslint test/**",
   },
   "repository": {
     "type": "git",
@@ -25,7 +26,10 @@
   "homepage": "https://github.com/Kir-Antipov/mc-publish#readme",
   "devDependencies": {
     "@types/node": "^16.10.1",
+    "@typescript-eslint/eslint-plugin": "^4.31.2",
+    "@typescript-eslint/parser": "^4.31.2",
     "@vercel/ncc": "^0.31.1",
+    "eslint": "^7.32.0",
     "typescript": "^4.4.3"
   },
   "dependencies": {}