Migrate from ESLint & Prettier to BiomeJs

biome.json

@@ -0,0 +1,24 @@
+{
+	"$schema": "https://biomejs.dev/schemas/1.8.3/schema.json",
+	"files": {
+		"include": ["src/**/*.ts", "test/**/*.ts"]
+	},
+	"formatter": {
+		"enabled": true
+	},
+	"linter": {
+		"enabled": true,
+		"rules": {
+			"recommended": true,
+			"suspicious": {
+				"noExplicitAny": "off"
+			}
+		}
+	},
+	"javascript": {
+		"formatter": {
+			"quoteStyle": "single",
+			"indentWidth": 2
+		}
+	}
+}

package.json

@@ -19,31 +19,28 @@
     "node": ">=14.0.0"
   },
   "devDependencies": {
+    "@biomejs/biome": "1.8.3",
     "@rollup/plugin-typescript": "^11.1.6",
     "@types/expect": "^24.3.0",
     "@types/lodash": "^4.14.144",
     "@types/node": "^18.7.14",
     "@typescript-eslint/eslint-plugin": "^7.1.1",
     "@typescript-eslint/parser": "^7.1.1",
-    "eslint": "^8.57.0",
-    "eslint-config-prettier": "^9.1.0",
-    "eslint-plugin-prettier": "^5.1.3",
     "lodash": "^4.17.15",
     "np": "^10.0.0",
-    "prettier": "^3.2.5",
     "rollup": "^4.12.1",
     "typescript": "^4.8.3",
     "vitest": "^1.6.0"
   },
   "scripts": {
     "build": "rm -rf ./{dist} && rollup --config ./rollup.config.js",
     "clean": "rm -rf ./{dist,node_modules}",
-    "fix": "npm run fix:eslint && npm run fix:prettier",
-    "fix:eslint": "npm run lint:eslint --fix",
-    "fix:prettier": "prettier '**/*.{js,json,ts}' --write",
-    "lint": "npm run lint:eslint && npm run lint:prettier",
-    "lint:eslint": "eslint '{src,test}/*.{js,ts}'",
-    "lint:prettier": "prettier '**/*.{js,json,ts}' --check",
+    "fix": "npx @biomejs/biome check --write .",
+    "fix:lint": "npx @biomejs/biome lint --write .",
+    "fix:format": "npx @biomejs/biome format --write .",
+    "lint": "npx @biomejs/biome check .",
+    "lint:lint": "npx @biomejs/biome lint .",
+    "lint:format": "npx @biomejs/biome format .",
     "release": "npm run build && npm run lint && np",
     "test": "npm run build && npm run test:types && npm run test:vitest",
     "test:types": "tsc --noEmit && tsc --project ./test/tsconfig.json --noEmit",

src/error.ts

@@ -3,15 +3,15 @@
  */
 
 export type Failure = {
-  value: any
-  key: any
-  type: string
-  refinement: string | undefined
-  message: string
-  explanation?: string
-  branch: Array<any>
-  path: Array<any>
-}
+	value: any;
+	key: any;
+	type: string;
+	refinement: string | undefined;
+	message: string;
+	explanation?: string;
+	branch: Array<any>;
+	path: Array<any>;
+};
 
 /**
  * `StructError` objects are thrown (or returned) when validation fails.
@@ -23,27 +23,27 @@ export type Failure = {
  */
 
 export class StructError extends TypeError {
-  value: any
-  key!: any
-  type!: string
-  refinement!: string | undefined
-  path!: Array<any>
-  branch!: Array<any>
-  failures: () => Array<Failure>;
-  [x: string]: any
+	value: any;
+	key!: any;
+	type!: string;
+	refinement!: string | undefined;
+	path!: Array<any>;
+	branch!: Array<any>;
+	failures: () => Array<Failure>;
+	[x: string]: any;
 
-  constructor(failure: Failure, failures: () => Generator<Failure>) {
-    let cached: Array<Failure> | undefined
-    const { message, explanation, ...rest } = failure
-    const { path } = failure
-    const msg =
-      path.length === 0 ? message : `At path: ${path.join('.')} -- ${message}`
-    super(explanation ?? msg)
-    if (explanation != null) this.cause = msg
-    Object.assign(this, rest)
-    this.name = this.constructor.name
-    this.failures = () => {
-      return (cached ??= [failure, ...failures()])
-    }
-  }
+	constructor(failure: Failure, failures: () => Generator<Failure>) {
+		let cached: Array<Failure> | undefined;
+		const { message, explanation, ...rest } = failure;
+		const { path } = failure;
+		const msg =
+			path.length === 0 ? message : `At path: ${path.join('.')} -- ${message}`;
+		super(explanation ?? msg);
+		if (explanation != null) this.cause = msg;
+		Object.assign(this, rest);
+		this.name = this.constructor.name;
+		this.failures = () => {
+			return (cached ??= [failure, ...failures()]);
+		};
+	}
 }

src/index.ts

@@ -1,6 +1,6 @@
-export * from './error.js'
-export * from './struct.js'
-export * from './structs/coercions.js'
-export * from './structs/refinements.js'
-export * from './structs/types.js'
-export * from './structs/utilities.js'
+export * from './error.js';
+export * from './struct.js';
+export * from './structs/coercions.js';
+export * from './structs/refinements.js';
+export * from './structs/types.js';
+export * from './structs/utilities.js';