chore: test biomejs for linting

biome.json

@@ -0,0 +1,72 @@
+{
+	"$schema": "https://biomejs.dev/schemas/2.4.15/schema.json",
+	"vcs": {
+		"enabled": true,
+		"clientKind": "git",
+		"useIgnoreFile": true
+	},
+	"files": {
+		"ignoreUnknown": false,
+		"includes": [
+			"**",
+			"!packages/create-package/**",
+			"!packages/cypress-ct-ui5-webc/**",
+			"!packages/cypress-internal/**",
+			"!packages/icons-business-suite/**",
+			"!packages/icons-tnt/**",
+			"!packages/theming/**",
+			"!packages/tools/**",
+			"!packages/website/**",
+			"!packages/localization/**"
+		]
+	},
+	"formatter": {
+		"enabled": true,
+		"indentStyle": "tab"
+	},
+	"linter": {
+		"enabled": true,
+		"rules": {
+			"recommended": true,
+			"complexity": {
+				"noExtraBooleanCast": "error",
+				"noVoid": "error"
+			},
+			"style": {
+				"noYodaExpression": "error",
+				"useBlockStatements": "error",
+				"noNestedTernary": "error",
+				"useImportType": "error",
+				"noNonNullAssertion": "off"
+			},
+			"suspicious": {
+				"noAlert": "error",
+				"noConsole": "error",
+				"noSparseArray": "error",
+				"noEmptyBlockStatements": "off",
+				"noExplicitAny": "off",
+				"noEmptyInterface": "off"
+			}
+		}
+	},
+	"javascript": {
+		"formatter": {
+			"quoteStyle": "double"
+		}
+	},
+	"assist": {
+		"enabled": true,
+		"actions": {
+			"source": {
+				"organizeImports": "on"
+			}
+		}
+	},
+	"overrides": [
+		{
+			"includes": ["**/*.css"],
+			"formatter": { "enabled": false },
+			"linter": { "enabled": false }
+		}
+	]
+}

eslint-biome-gaps.md

@@ -0,0 +1,41 @@
+# ESLint Rules Without Biome Equivalent
+
+The following rules from `packages/tools/components-package/eslint.js` have no direct equivalent in Biome v2 and are not enforced after the ESLint → Biome migration.
+
+## Base Rules
+
+| ESLint Rule | Notes |
+|---|---|
+| `no-caller` | Disallows `arguments.caller`/`arguments.callee` — no Biome equivalent |
+| `no-extend-native` | Disallows extending native prototypes — no Biome equivalent |
+| `no-iterator` | Disallows `__iterator__` property — no Biome equivalent |
+| `no-labels` | Disallows labeled statements — no Biome equivalent |
+| `no-lone-blocks` | Disallows unnecessary block statements — no Biome equivalent |
+| `no-new-func` | Disallows `new Function()` — no Biome equivalent |
+| `no-new-wrappers` | Disallows `new String/Number/Boolean` — no Biome equivalent |
+| `no-use-before-define` | Disallows use before declaration — no Biome equivalent |
+| `no-array-constructor` | Disallows `new Array()` — no Biome equivalent |
+| `no-new-object` | Disallows `new Object()` — no Biome equivalent |
+| `camelcase` | Enforces camelCase naming — no Biome equivalent |
+| `no-undef` | `correctness/noUndeclaredVariables` exists but excluded — too noisy without type info |
+| `import/extensions: always` | Requires file extensions on imports — no Biome equivalent |
+| `import/consistent-type-specifier-style` | Covered partially by `useImportType` but not identical |
+
+## TypeScript Override Rules (set to "off" in ESLint — rules that don't exist in Biome)
+
+| ESLint Rule | Notes |
+|---|---|
+| `@typescript-eslint/no-unsafe-member-access` | No Biome equivalent |
+| `@typescript-eslint/no-floating-promises` | No Biome equivalent |
+| `@typescript-eslint/no-unsafe-assignment` | No Biome equivalent |
+| `@typescript-eslint/ban-ts-comment` | No Biome equivalent (`noBannedTypes` is unrelated) |
+| `@typescript-eslint/no-unsafe-call` | No Biome equivalent |
+| `@typescript-eslint/unbound-method` | No Biome equivalent |
+| `@typescript-eslint/no-misused-promises` | No Biome equivalent |
+| `lines-between-class-members` | Formatter/style rule — no Biome equivalent |
+
+## Custom Plugin Rules
+
+| ESLint Rule | Notes |
+|---|---|
+| `jsx-no-leaked-values/jsx-no-leaked-values` | Custom plugin for JSX leaked values — no Biome equivalent |

package.json

@@ -46,6 +46,7 @@
     "ci:test:prepare": "yarn workspace @ui5/cypress-ct-ui5-webc build && yarn workspace @ui5/cypress-internal build",
     "ci:releasebuild": "npm-run-all --sequential generate ts generateProd generateAPI",
     "ci:lint": "npm-run-all --sequential generate lint",
+
     "ci:testbuild": "npm-run-all --sequential generate ts generateProd bundle ci:test:prepare",
     "ci:deploy": "DEPLOY=true yarn ci:testbuild && yarn generateAPI && yarn workspace @ui5/webcomponents-website ci:build",
     "ci:deploy:nightly": "DEPLOY_NIGHTLY=true yarn ci:testbuild && yarn generateAPI && yarn workspace @ui5/webcomponents-website ci:build:nightly",
@@ -58,15 +59,15 @@
     "ci:test:fiori": "yarn workspace @ui5/webcomponents-fiori test:ssr && yarn workspace @ui5/webcomponents-fiori test:cypress",
     "ci:test:compat": "yarn workspace @ui5/webcomponents-compat test:ssr && yarn workspace @ui5/webcomponents-compat test:cypress",
     "ci:test:ai": "yarn workspace @ui5/webcomponents-ai test:ssr && yarn workspace @ui5/webcomponents-ai test",
-    "lint": "yarn workspaces foreach --all --parallel run lint",
-    "lint:scope": "yarn workspaces foreach --all --parallel run lint:scope",
+    "lint": "biome check .",
     "link-all": "yarn workspaces foreach --all --parallel run link",
     "unlink-all": "yarn workspaces foreach --all --parallel run unlink",
     "prepare": "husky install",
     "husky:commit-msg": "commitlint -e",
     "husky:pre-push": "npm-run-all --sequential husky:commit-msg"
   },
   "devDependencies": {
+    "@biomejs/biome": "2.4.15",
     "@commitlint/cli": "^16.2.3",
     "@commitlint/config-conventional": "^16.2.1",
     "@semantic-release/github": "^11.0.0",

packages/ai/biome.json

@@ -0,0 +1,22 @@
+{
+	"$schema": "https://biomejs.dev/schemas/2.4.15/schema.json",
+	"root": false,
+	"extends": ["../../biome.json"],
+	"files": {
+		"includes": [
+			"**",
+			"!target/**",
+			"!dist/**",
+			"!src/generated/**",
+			"!cypress/**",
+			"!lib/**",
+			"!test/**",
+			"!bundle.*.js",
+			"!rollup.config*.js",
+			"!postcss.config.cjs",
+			"!cypress.config.js",
+			"!package-scripts.cjs",
+			"!.eslintrc.cjs"
+		]
+	}
+}

packages/ai/package.json

@@ -16,7 +16,7 @@
   ],
   "scripts": {
     "clean": "wc-dev clean",
-    "lint": "wc-dev lint",
+    "lint": "",
     "lint:scope": "wc-dev scope.lint",
     "start": "wc-dev start",
     "build": "wc-dev build",

packages/base/biome.json

@@ -0,0 +1,32 @@
+{
+	"$schema": "https://biomejs.dev/schemas/2.4.15/schema.json",
+	"root": false,
+	"extends": ["../../biome.json"],
+	"files": {
+		"includes": [
+			"**",
+			"!test/**",
+			"!lib/**",
+			"!dist/**",
+			"!src/generated/**",
+			"!src/thirdparty/**",
+			"!cypress/**",
+			"!bundle.esm.js",
+			"!bundle.es5.js",
+			"!rollup.config*.js",
+			"!cypress.config.js",
+			"!postcss.config.cjs",
+			"!package-scripts.cjs",
+			"!.eslintrc.cjs",
+			"!src/renderer/directives/style-map.js",
+			"!src/util/metaUrl.js",
+			"!src/ssr-dom*",
+			"!index.js",
+			"!src/jsx-runtime.ts",
+			"!src/jsx-dev-runtime.ts",
+			"!jsx-runtime.d.ts",
+			"!jsx-dev-runtime.d.ts",
+			"!jsx-utils.ts"
+		]
+	}
+}

packages/base/package-scripts.cjs

@@ -24,7 +24,7 @@ const scripts = {
 		"generated": `ui5nps-script "${LIB}/rimraf/rimraf.js src/generated`,
 		"dist": `ui5nps-script "${LIB}/rimraf/rimraf.js dist`,
 	},
-	lint: `ui5nps-script "${LIB}/eslint/eslint.js"`,
+	lint: ``,
 	generate: "ui5nps clean build.i18n integrate copy generateAssetParameters generateVersionInfo generateStyles generateFontFace build.jsonImports",
 	prepare: "ui5nps clean build.i18n integrate copy generateAssetParameters generateVersionInfo generateStyles generateFontFace typescript integrate.no-remaining-require build.jsonImports",
 	typescript: "tsc -b",

packages/base/package.json

@@ -44,7 +44,7 @@
   "types": "./dist",
   "scripts": {
     "clean": "wc-dev clean",
-    "lint": "wc-dev lint",
+    "lint": "",
     "start": "wc-dev start",
     "build": "wc-dev build",
     "generate": "wc-dev generate",

packages/compat/biome.json

@@ -0,0 +1,22 @@
+{
+	"$schema": "https://biomejs.dev/schemas/2.4.15/schema.json",
+	"root": false,
+	"extends": ["../../biome.json"],
+	"files": {
+		"includes": [
+			"**",
+			"!target/**",
+			"!dist/**",
+			"!src/generated/**",
+			"!cypress/**",
+			"!lib/**",
+			"!test/**",
+			"!bundle.*.js",
+			"!rollup.config*.js",
+			"!postcss.config.cjs",
+			"!cypress.config.js",
+			"!package-scripts.cjs",
+			"!.eslintrc.cjs"
+		]
+	}
+}

packages/compat/package.json

@@ -16,7 +16,7 @@
   ],
   "scripts": {
     "clean": "wc-dev clean",
-    "lint": "wc-dev lint",
+    "lint": "",
     "lint:scope": "wc-dev scope.lint",
     "start": "wc-dev start",
     "build": "wc-dev build",

packages/fiori/biome.json

@@ -0,0 +1,23 @@
+{
+	"$schema": "https://biomejs.dev/schemas/2.4.15/schema.json",
+	"root": false,
+	"extends": ["../../biome.json"],
+	"files": {
+		"includes": [
+			"**",
+			"!target/**",
+			"!dist/**",
+			"!src/generated/**",
+			"!cypress/**",
+			"!lib/**",
+			"!test/**",
+			"!bundle.*.js",
+			"!rollup.config*.js",
+			"!cypress.config.js",
+			"!postcss.config.cjs",
+			"!package-scripts.cjs",
+			"!src/illustrations/js-imports/illustrations.js",
+			"!.eslintrc.cjs"
+		]
+	}
+}

packages/fiori/package.json

@@ -30,7 +30,7 @@
   },
   "scripts": {
     "clean": "wc-dev clean",
-    "lint": "wc-dev lint",
+    "lint": "",
     "lint:scope": "wc-dev scope.lint",
     "start": "wc-dev start",
     "watch": "wc-dev watch",