@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'); 
}

以上的答案为我指明了正确的方向，只是没有一个真正适合我。下面是一个工作原型，一个onCall, onRequest和数据库触发器的例子

foo.js - 随叫随到，随叫随到。

exports.handler = async function(data, context, admin) {
    // const database = admin.database();
    // const firestore = admin.firestore();
    //...
};

bar.js - onRequest

exports.handler = async function(req, res, admin) {
    // const database = admin.database();
    // const firestore = admin.firestore();
    //...
};

jar.js - trigger/document/onCreate .js

exports.handler = async function(snapshot, context, admin) {
    // const database = admin.database();
    // const firestore = admin.firestore();
    //...
};

index.js

//导入firebase管理SDK依赖项

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase); 

// import functions
const foo = require("./foo");
const bar = require("./bar");
const jar = require("./jar");

// onCall for foo.js
exports.foo = functions.https.onCall((data, context) => {
    return foo.handler(data, context, admin);
});

// onRequest for bar.js
exports.bar = functions.https.onRequest((req, res) => {
    return bar.handler(req, res, admin);
});

// document trigger for jar.js
exports.jar = functions.firestore
  .document("parentCollection/{parentCollectionId}")
  .onCreate((snapshot, context) => {
    return jar.handler(snapshot, context, admin);
});

注意:你也可以创建一个子文件夹来存放你的各个函数

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) => {
    ...
};

为了保持简单(但能完成工作)，我个人是这样构造我的代码的。

布局

├── /src/                      
│   ├── index.ts               
│   ├── foo.ts           
│   ├── bar.ts
|   ├── db.ts           
└── package.json  

foo.ts

import * as functions from 'firebase-functions';
export const fooFunction = functions.database()......... {
    //do your function.
}

export const someOtherFunction = functions.database().......... {
    // do the thing.
}

bar.ts

import * as functions from 'firebase-functions';
export const barFunction = functions.database()......... {
    //do your function.
}

export const anotherFunction = functions.database().......... {
    // do the thing.
}

db.ts

import * as admin from 'firebase-admin';
import * as functions from 'firebase-functions';

export const firestore = admin.firestore();
export const realtimeDb = admin.database();

index.ts

import * as admin from 'firebase-admin';
import * as functions from 'firebase-functions';

admin.initializeApp(functions.config().firebase);
// above codes only needed if you use firebase admin

export * from './foo';
export * from './bar';

适用于任何嵌套级别的目录。也只需遵循目录中的模式即可。

这要归功于@zaidfazil的答案

我有这个项目，它有后台函数和http函数。我还有用于单元测试的测试。CI/CD将使您在部署云功能时更加轻松

文件夹结构

|-- package.json
|-- cloudbuild.yaml
|-- functions
    |-- index.js
    |-- background
    |   |-- onCreate
    |       |-- index.js
            |-- create.js
    |
    |-- http
    |   |-- stripe
    |       |-- index.js
    |       |-- payment.js
    |-- utils
        |-- firebaseHelpers.js
    |-- test
        |-- ...
    |-- package.json

注意:utils/文件夹用于在函数之间共享代码

函数/ index.js

在这里，您可以导入所需的所有函数并声明它们。这里不需要逻辑。在我看来，这样更干净。

require('module-alias/register');
const functions = require('firebase-functions');

const onCreate = require('@background/onCreate');
const onDelete = require('@background/onDelete');
const onUpdate = require('@background/onUpdate');

const tours  = require('@http/tours');
const stripe = require('@http/stripe');

const docPath = 'tours/{tourId}';

module.exports.onCreate = functions.firestore.document(docPath).onCreate(onCreate);
module.exports.onDelete = functions.firestore.document(docPath).onDelete(onDelete);
module.exports.onUpdate = functions.firestore.document(docPath).onUpdate(onUpdate);

module.exports.tours  = functions.https.onRequest(tours);
module.exports.stripe = functions.https.onRequest(stripe);

CI / CD

每次将更改推送到回购时都进行持续集成和部署如何?你可以使用谷歌谷歌云构建。它是免费的，直到某个点:)检查这个链接。

。/ cloudbuild.yaml

steps:
  - name: "gcr.io/cloud-builders/npm"
    args: ["run", "install:functions"]
  - name: "gcr.io/cloud-builders/npm"
    args: ["test"]
  - name: "gcr.io/${PROJECT_ID}/firebase"
    args:
      [
        "deploy",
        "--only",
        "functions",
        "-P",
        "${PROJECT_ID}",
        "--token",
        "${_FIREBASE_TOKEN}"
      ]

substitutions:
    _FIREBASE_TOKEN: nothing

Node 8 LTS现在可以与Cloud/Firebase函数一起使用，您可以使用扩展操作符执行以下操作:

/ package.json

"engines": {
  "node": "8"
},

/ index.js

const functions = require("firebase-functions");
const admin = require("firebase-admin");
admin.initializeApp();

module.exports = {
  ...require("./lib/foo.js"),
  // ...require("./lib/bar.js") // add as many as you like
};

/lib/foo.js

const functions = require("firebase-functions");
const admin = require("firebase-admin");

exports.fooHandler = functions.database
  .ref("/food/{id}")
  .onCreate((snap, context) => {
    let id = context.params["id"];

    return admin
      .database()
      .ref(`/bar/${id}`)
      .set(true);
  });