add eslint ci check

.github/workflows/code-quality.yml

@@ -1,6 +1,34 @@
-name: Prettier
+name: Code Quality
 on: pull_request
 jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup node
+        uses: actions/setup-node@v2
+        with:
+          node-version: "12"
+      - name: Checkout the repo
+        uses: actions/checkout@v2
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        env:
+          cache-name: yarn-cache
+        with:
+          path: |
+            ~/.npm
+            ~/.cache
+            **/node_modules
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+      - name: Run yarn install
+        run: yarn install --frozen-lockfile
+      - name: Run yarn lint
+        run: yarn lint
   prettier:
     name: Prettier Formatting
     runs-on: ubuntu-latest

package.json

@@ -20,6 +20,7 @@
   },
   "scripts": {
     "preinstall": "node -e \"if(process.env.npm_execpath.indexOf('yarn') === -1) throw new Error('Please use yarn to install dependencies\\n\\n')\"",
+    "lint": "eslint --ext js,jsx,ts,tsx .",
     "prettier:check": "yarn prettier . --check --ignore-unknown",
     "prettier:write": "yarn prettier . --write --ignore-unknown",
     "setup": "wsrun -me -t setup",