[Style] Add GitHub action for linter and pre-commit hook for formating

.eslintrc.cjs

@@ -1,9 +1,10 @@
 module.exports = {
-    extends: ['eslint:recommended', 'plugin:@typescript-eslint/recommended'],
+    extends: ['eslint:recommended', 'plugin:@typescript-eslint/recommended', 'plugin:prettier/recommended'],
     parser: '@typescript-eslint/parser',
     plugins: ['@typescript-eslint'],
     root: true,
     rules: {
-        "@typescript-eslint/no-explicit-any": "off"
+        "@typescript-eslint/no-explicit-any": "off",
+        "@typescript-eslint/no-empty-function": "off"
     }
 };

.github/workflows/linter.yaml

@@ -0,0 +1,23 @@
+name: Linter
+
+on:
+  push: {}
+  pull_request: {}
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: '16' # Specify the Node.js version you want to use
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run lint
+        run: npm run lint

.husky/pre-commit

@@ -0,0 +1 @@
+npm run format

package.json

@@ -7,8 +7,10 @@
   "type": "module",
   "scripts": {
     "build": "rollup -c && ./cleanup-index-js.sh",
-    "lint": "npx eslint .",
-    "test": "yarn jest"
+    "lint": "npx eslint ./src/ && npx prettier ./src --check",
+    "test": "yarn jest",
+    "format": "prettier --write \"./src/\"",
+    "prepare": "husky"
   },
   "files": [
     "lib"
@@ -36,7 +38,11 @@
     "@webgpu/types": "^0.1.24",
     "buffer": "^5.7.1",
     "eslint": "^8.41.0",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-prettier": "^5.1.3",
+    "husky": "^9.0.11",
     "jest": "^29.7.0",
+    "prettier": "3.2.5",
     "process": "^0.11.10",
     "rollup": "^2.56.2",
     "rollup-plugin-ignore": "^1.0.10",

src/cache_util.ts

@@ -1,21 +1,20 @@
 import * as tvmjs from "tvmjs";
-import {
-  AppConfig,
-  ModelRecord,
-  prebuiltAppConfig,
-} from "./config";
+import { AppConfig, ModelRecord, prebuiltAppConfig } from "./config";
 
 function findModelRecord(modelId: string, appConfig?: AppConfig): ModelRecord {
   const matchedItem = appConfig?.model_list.find(
-    item => item.model_id == modelId
+    (item) => item.model_id == modelId,
   );
   if (matchedItem !== undefined) {
     return matchedItem;
   }
   throw Error("Cannot find model_url for " + modelId);
 }
 
-export async function hasModelInCache(modelId: string, appConfig?: AppConfig): Promise<boolean> {
+export async function hasModelInCache(
+  modelId: string,
+  appConfig?: AppConfig,
+): Promise<boolean> {
   if (appConfig === undefined) {
     appConfig = prebuiltAppConfig;
   }
@@ -25,7 +24,10 @@ export async function hasModelInCache(modelId: string, appConfig?: AppConfig): P
   return tvmjs.hasNDArrayInCache(modelUrl, "webllm/model", cacheType);
 }
 
-export async function deleteModelAllInfoInCache(modelId: string, appConfig?: AppConfig) {
+export async function deleteModelAllInfoInCache(
+  modelId: string,
+  appConfig?: AppConfig,
+) {
   // function to delete model all information in cache
   if (appConfig === undefined) {
     appConfig = prebuiltAppConfig;
@@ -34,30 +36,43 @@ export async function deleteModelAllInfoInCache(modelId: string, appConfig?: App
   await deleteModelInCache(modelId, appConfig);
   // delete wasm in cache
   await deleteModelWasmInCache(modelId, appConfig);
-  // delete chat config 
+  // delete chat config
   await deleteChatConfigInCache(modelId, appConfig);
 }
 
-
-export async function deleteModelInCache(modelId: string, appConfig?: AppConfig) {
+export async function deleteModelInCache(
+  modelId: string,
+  appConfig?: AppConfig,
+) {
   // delete the model NDArray In Cache
   if (appConfig === undefined) {
     appConfig = prebuiltAppConfig;
   }
   const modelRecord = findModelRecord(modelId, appConfig);
   let modelCache: tvmjs.ArtifactCacheTemplate;
   if (appConfig.useIndexedDBCache) {
-    tvmjs.deleteNDArrayCache(modelRecord.model_url, "webllm/model", "indexeddb");
+    tvmjs.deleteNDArrayCache(
+      modelRecord.model_url,
+      "webllm/model",
+      "indexeddb",
+    );
     modelCache = new tvmjs.ArtifactIndexedDBCache("webllm/model");
   } else {
     tvmjs.deleteNDArrayCache(modelRecord.model_url, "webllm/model", "cache");
     modelCache = new tvmjs.ArtifactCache("webllm/model");
   }
-  await modelCache.deleteInCache(new URL("tokenizer.model", modelRecord.model_url).href);
-  await modelCache.deleteInCache(new URL("tokenizer.json", modelRecord.model_url).href);
+  await modelCache.deleteInCache(
+    new URL("tokenizer.model", modelRecord.model_url).href,
+  );
+  await modelCache.deleteInCache(
+    new URL("tokenizer.json", modelRecord.model_url).href,
+  );
 }
 
-export async function deleteChatConfigInCache(modelId: string, appConfig?: AppConfig) {
+export async function deleteChatConfigInCache(
+  modelId: string,
+  appConfig?: AppConfig,
+) {
   // delete the chat configuration in Cache
   if (appConfig === undefined) {
     appConfig = prebuiltAppConfig;
@@ -73,7 +88,10 @@ export async function deleteChatConfigInCache(modelId: string, appConfig?: AppCo
   await configCache.deleteInCache(configUrl);
 }
 
-export async function deleteModelWasmInCache(modelId: string, appConfig?: AppConfig) {
+export async function deleteModelWasmInCache(
+  modelId: string,
+  appConfig?: AppConfig,
+) {
   // delete the wasm in Cache
   if (appConfig === undefined) {
     appConfig = prebuiltAppConfig;