ci: add prettier check

.github/workflows/ci.yml

@@ -0,0 +1,37 @@
+name: CI
+on:
+  # CI is run on main because new branches can only access caches from master, not previous branches.
+  # So building on master allows new PR's to get the cache from before.
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  lint:
+    timeout-minutes: 5
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+
+      - name: install node
+        uses: actions/setup-node@v3
+        with:
+          cache: "yarn"
+          node-version: "18"
+
+      - name: Restore cached dependencies for Node modules
+        id: module-cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ github.workspace }}/node_modules
+          key: ${{ runner.os }}--node--${{ hashFiles('**/yarn.lock') }}
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: Run prettier check
+        run: yarn lint:check

.gitignore

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+node_modules/

.prettierrc.yml

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+semi: true
+trailingComma: 'es5'
+singleQuote: true
+printWidth: 120
+tabWidth: 2
+useTabs: false

package.json

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+{
+  "name": "farcaster-protocol",
+  "version": "0.0.1",
+  "description": "specification of the farcaster protocol",
+  "main": "README.md",
+  "repository": "[email protected]:farcasterxyz/protocol.git",
+  "author": "Varun Srinivasan <[email protected]>",
+  "license": "unlicensed",
+  "devDependencies": {
+    "prettier": "^2.7.1"
+  },
+  "scripts": {
+    "lint": "yarn prettier",
+    "lint:check": "yarn prettier:check",
+    "prettier": "prettier --config \"./.prettierrc.yml\" --write \"**/*.{json,md}\"",
+    "prettier:check": "prettier --config \"./.prettierrc.yml\" --check \"**/*.{json,md}\""
+  }
+}

yarn.lock

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+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+prettier@^2.7.1:
+  version "2.7.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.7.1.tgz#e235806850d057f97bb08368a4f7d899f7760c64"
+  integrity sha512-ujppO+MkdPqoVINuDFDRLClm7D78qbDt0/NR+wp5FqEZOoTNAjPHWj17QRhu7geIHJfcNhRk1XVQmF8Bp3ye+g==