monorepo 環境で Firebase Cloud Functions の設定

firebase.json

{
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "functions": [
    {
      "codebase": "backend",
      "source": "packages/firebase-functions",
      "ignore": [
        "node_modules",
        ".git",
        "firebase-debug.log",
        "firebase-debug.*.log"
      ],
      "predeploy": [
        "yarn workspace @repos/functions run build"
      ]
    }
  ]
}

packages.json

{
  "name": "@repos/functions",
  "scripts": {
    "build": "tsc",
    "build:watch": "tsc --watch",
    "serve": "npm run build && firebase emulators:start --only functions",
    "shell": "npm run build && firebase functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "engines": {
    "node": "16"
  },
  "main": "lib/firebase-functions/src/index.js",
  "dependencies": {
    "firebase-admin": "^11.6.0",
    "firebase-functions": "^4.2.1"
  },
  "devDependencies": {
    "firebase-functions-test": "^3.0.0",
    "typescript": "^4.9.0"
  },
  "private": true,
  "version": "1.0.0"
}