我花了很多时间寻找同样的东西，我认为这是实现它的最佳方法(我使用firebase@7.3.0):

https://codeburst.io/organizing-your-firebase-cloud-functions-67dc17b3b0da

毫不费力;)

啊，Firebase负载节点模块的云函数通常，所以这是有效的

结构:

/functions
|--index.js
|--foo.js
|--bar.js
|--package.json

index.js:

const functions = require('firebase-functions');
const fooModule = require('./foo');
const barModule = require('./bar');

exports.foo = functions.database.ref('/foo').onWrite(fooModule.handler);
exports.bar = functions.database.ref('/bar').onWrite(barModule.handler);

foo.js:

exports.handler = (event) => {
    ...
};

bar.js:

exports.handler = (event) => {
    ...
};

我使用一个普通的JS引导加载器来自动包含我想使用的所有函数。

├── /functions
│   ├── /test/
│   │   ├── testA.js
│   │   └── testB.js
│   ├── index.js
│   └── package.json

index.js(引导)

/**
 * The bootloader reads all directories (single level, NOT recursively)
 * to include all known functions.
 */
const functions = require('firebase-functions');
const fs = require('fs')
const path = require('path')

fs.readdirSync(process.cwd()).forEach(location => {
  if (!location.startsWith('.')) {
    location = path.resolve(location)

    if (fs.statSync(location).isDirectory() && path.dirname(location).toLowerCase() !== 'node_modules') {
      fs.readdirSync(location).forEach(filepath => {
        filepath = path.join(location, filepath)

        if (fs.statSync(filepath).isFile() && path.extname(filepath).toLowerCase() === '.js') {
          Object.assign(exports, require(filepath))
        }
      })
    }
  }
})

---

这个例子index.js文件只在根目录中自动包含目录。它可以扩展到walk目录，honor .gitignore等。不过这对我来说已经足够了。

有了索引文件，添加新函数就很简单了。

/测试/ testA.js

const functions = require('firebase-functions');

exports.helloWorld = functions.https.onRequest((request, response) => {
 response.send("Hello from Firebase!");
});

/测试/ testB.js

const functions = require('firebase-functions');

exports.helloWorld2 = functions.https.onRequest((request, response) => {
 response.send("Hello again, from Firebase!");
});

---

NPM运行服务产生:

λ ~/Workspace/Ventures/Author.io/Firebase/functions/ npm run serve

> functions@ serve /Users/cbutler/Workspace/Ventures/Author.io/Firebase/functions
> firebase serve --only functions


=== Serving from '/Users/cbutler/Workspace/Ventures/Author.io/Firebase'...

i  functions: Preparing to emulate functions.
Warning: You're using Node.js v9.3.0 but Google Cloud Functions only supports v6.11.5.
✔  functions: helloWorld: http://localhost:5000/authorio-ecorventures/us-central1/helloWorld
✔  functions: helloWorld2: http://localhost:5000/authorio-ecorventures/us-central1/helloWorld2

这个工作流程基本上就是“编写并运行”，而不必在每次添加/修改/删除新函数/文件时修改index.js文件。

@jasonsirota的回答很有帮助。但是查看更详细的代码可能会有用，特别是在HTTP触发函数的情况下。

使用与@jasonsirota回答中相同的结构，假设你希望在两个不同的文件中有两个单独的HTTP触发函数:

目录结构:

    /functions
       |--index.js
       |--foo.js
       |--bar.js
       |--package.json

index.js:

'use strict';
const fooFunction = require('./foo');
const barFunction = require('./bar');

// Note do below initialization tasks in index.js and
// NOT in child functions:
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase); 
const database = admin.database();

// Pass database to child functions so they have access to it
exports.fooFunction = functions.https.onRequest((req, res) => {
    fooFunction.handler(req, res, database);
});
exports.barFunction = functions.https.onRequest((req, res) => {
    barFunction.handler(req, res, database);
});

foo.js:

 exports.handler = function(req, res, database) {
      // Use database to declare databaseRefs:
      usersRef = database.ref('users');
          ...
      res.send('foo ran successfully'); 
   }

bar.js:

exports.handler = function(req, res, database) {
  // Use database to declare databaseRefs:
  usersRef = database.ref('users');
      ...
  res.send('bar ran successfully'); 
}

有一种很好的方法可以长期组织所有的云功能。我最近就这么做了，效果完美无缺。

我所做的是根据每个云函数的触发端点将它们组织在单独的文件夹中。每个云函数的文件名都以*.f.js结尾。例如，如果你在user/{userId}/document/{documententid}上有onCreate和onUpdate触发器，那么在functions/user/document/目录下创建两个文件onCreate.f.js和onUpdate.f.js，你的函数将分别命名为userDocumentOnCreate和userDocumentOnUpdate。(1）

下面是一个目录结构示例:

functions/
|----package.json
|----index.js
/----user/
|-------onCreate.f.js
|-------onWrite.f.js
/-------document/
|------------onCreate.f.js
|------------onUpdate.f.js
/----books/
|-------onCreate.f.js
|-------onUpdate.f.js
|-------onDelete.f.js

样本函数

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const db = admin.database();
const documentsOnCreate = functions.database
    .ref('user/{userId}/document/{documentId}')
    .onCreate((snap, context) => {
        // your code goes here
    });
exports = module.exports = documentsOnCreate;

Index.js

const glob = require("glob");
const camelCase = require('camelcase');
const admin = require('firebase-admin');
const serviceAccount = require('./path/to/ServiceAccountKey.json');
try {
    admin.initializeApp({ credential: admin.credential.cert(serviceAccount),
    databaseURL: "Your database URL" });
} catch (e) {
    console.log(e);
}

const files = glob.sync('./**/*.f.js', { cwd: __dirname });
for (let f = 0, fl = files.length; f < fl; f++) {
    const file = files[f];
    const functionName = camelCase(file.slice(0, -5).split('/')); 
    if (!process.env.FUNCTION_NAME || process.env.FUNCTION_NAME === functionName) {
        exports[functionName] = require(file);
      }
}

你可以使用任何你想要的名字。对我来说，onCreate.f.js, onUpdate.f.js等似乎更相关的类型的触发器。

在Babel/Flow的情况下，它看起来像这样:

目录布局

.
├── /build/                     # Compiled output for Node.js 6.x
├── /src/                       # Application source files
│   ├── db.js                   # Cloud SQL client for Postgres
│   ├── index.js                # Main export(s)
│   ├── someFuncA.js            # Function A
│   ├── someFuncA.test.js       # Function A unit tests
│   ├── someFuncB.js            # Function B
│   ├── someFuncB.test.js       # Function B unit tests
│   └── store.js                # Firebase Firestore client
├── .babelrc                    # Babel configuration
├── firebase.json               # Firebase configuration
└── package.json                # List of project dependencies and NPM scripts

src/index.js -主要导出

export * from './someFuncA.js';
export * from './someFuncB.js';

src/db.js - Postgres云SQL客户端

import { Pool } from 'pg';
import { config } from 'firebase-functions';

export default new Pool({
  max: 1,
  user: '<username>',
  database: '<database>',
  password: config().db.password,
  host: `/cloudsql/${process.env.GCP_PROJECT}:<region>:<instance>`,
});

src/store.js - Firebase Firestore客户端

import firebase from 'firebase-admin';
import { config } from 'firebase-functions';

firebase.initializeApp(config().firebase);

export default firebase.firestore();

src/someFuncA.js -函数A

import { https } from 'firebase-functions';
import db from './db';

export const someFuncA = https.onRequest(async (req, res) => {
  const { rows: regions } = await db.query(`
    SELECT * FROM regions WHERE country_code = $1
  `, ['US']);
  res.send(regions);
});

src/someFuncB.js

import { https } from 'firebase-functions';
import store from './store';

export const someFuncB = https.onRequest(async (req, res) => {
  const { docs: regions } = await store
    .collection('regions')
    .where('countryCode', '==', 'US')
    .get();
  res.send(regions);
});

.babelrc

{
  "presets": [["env", { "targets": { "node": "6.11" } }]],
}

firebase.json

{
  "functions": {
    "source": ".",
    "ignore": [
      "**/node_modules/**"
    ]
  }
}

package.json

{
  "name": "functions",
  "verson": "0.0.0",
  "private": true,
  "main": "build/index.js",
  "dependencies": {
    "firebase-admin": "^5.9.0",
    "firebase-functions": "^0.8.1",
    "pg": "^7.4.1"
  },
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-core": "^6.26.0",
    "babel-jest": "^22.2.2",
    "babel-preset-env": "^1.6.1",
    "jest": "^22.2.2"
  },
  "scripts": {
    "test": "jest --env=node",
    "predeploy": "rm -rf ./build && babel --out-dir ./build src",
    "deploy": "firebase deploy --only functions"
  }
}

$ yarn install                  # Install project dependencies
$ yarn test                     # Run unit tests
$ yarn deploy                   # Deploy to Firebase