unable to split Firebase functions in multiple fil

问题:

I'm working with firebase functions and arrived to hundreds of functions, and now it is very hard to manage it in single index.js file as shown in their lots of examples

I tried to split that functions in multiple files like:

--firebase.json
--functions
  --node_modules
  --index.js
  --package.json
  --app
    --groupFunctions.js
    --authFunctions.js
    --storageFunctions.js

In this structure i divide my functions in three categories and put in that three files groupFunctions.js, authFunctions.js, and storageFunctions.js. I then tried to import thise files in index.js, but I don't know why it is not working for me.

Here is groupFunctions.js

var functions = require('firebase-functions');
module.exports = function(){
    exports.onGroupCreate = functions.database.ref('/groups/{groupId}')
        .onWrite(event => {
            console.log(`A group is created in database named:${event.params.groupId}.`);
            // some logic...
            //...
        })
}

Here is index.js file:

var functions = require('firebase-functions');
module.exports = require("./app/groupFunctions")();

My editor not giving any warning in this code. But when I deploy this code with firebase deploy --only functions, it does not deploy function. If some functions already exist on firebase console, it remove all functions on deploy.

here is deployment logs:

question is also asked on github

回答1:

Working code example:

file structure:

--firebase.json
--functions
  --node_modules
  --index.js
  --package.json
  --src
    --groupFunctions.js
    --authFunctions.js
    --storageFunctions.js

index.js file:

require('./src/groupFunctions.js')(exports);
require('./src/authFunctions.js')(exports);
require('./src/storageFunctions.js')(exports);

groupFunctions.js file:

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

module.exports = function (e) {
    e.onGroupCreate = functions.database.ref('/groups/{groupId}')
        .onWrite(event => {
            console.log(`A group is created in database named:${event.params.groupId}.`);
            // some logic...
            //...
        })
}

UPDATE: now I have better solution

The full working code is located at https://github.com/malikasinger1/firebase-functions-with-typescript and it's written with cutting edge tech like typescript and webpack. You may use this as a boilerplate/starter.

回答2:

You can pass the exports object to the function in groupFunctions.js, like this:

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

module.exports = function (e) {
    e.onGroupCreate = functions.database.ref('/groups/{groupId}')
        .onWrite(event => {
            console.log(`A group is created in database named:${event.params.groupId}.`);
            // some logic...
            //...
        })
}

Now, in index.js:

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

require("./app/groupFunctions")(module.exports);

The way it works is that modules.exports is a regular JavaScript object, so you can add new properties to that from wherever you want.

回答3:

If you want support for multiple functions inside a file, this Gist show a real example of how to do it

https://gist.github.com/saintplay/3f965e0aea933a1129cc2c9a823e74d7#file-index-js

You can dynamically import functions for every *.function.js

回答4:

//index.js
const glob = require('glob')
const files = glob.sync('./**/*.functions.js', { cwd: __dirname, 
ignore: './node_modules/**' })

files.forEach(file => {
const functionModule = require(file)
const functionNames = Object.keys(functionModule)

functionNames.forEach(functionName => {
    if (!process.env.FUNCTION_NAME || process.env.FUNCTION_NAME === 
    functionName) {
         exports[functionName] = functionModule[functionName]
     }
  })
 })

Folders like so.. will work

 //Example Home.functions.js :
 exports.Home = functions.https..