Install S:

npm i -g @eahefnawy/s

Start building your serverless library by creating an index.js file that exports your functions, and an optional config object:

const createUser = async (args) => {
  // create user here...
  return user
}

const updateUser = async (args) => {
  // update user here...
  return user
}

const deleteUser = async (args) => {
  // delete user here...
  return user
}

const config = {
  name: 'users', // defaults to parent dir name
  region: 'us-east-2', // defaults to us-east-1
  description: 'library of user functions', // defaults to "S: Build serverless libraries on AWS"
  memory: 512, // defaults to 128
  timeout: 300, // defaults to 10
  env: {
    SOME_TOKEN: 'abc'
  },
  origins: ['example.com'] // origin domains authorized to access your library. defaults to *
}

module.exports = { createUser, updateUser, deleteUser, config }

Sync your serverless library. Notice the returned SID:

$ s
✔ SID: a-qwertyuiop (copied to clipboard)
$

Now you can use your new serverless library by passing the SID and importing the functions you'd like to use:

const S = require('@eahefnawy/s')

const config = {
  SID: 'a-qwertyuiop',
  import: ['createUser', 'updateUser', 'deleteUser']
}

const { createUser, updateUser, deleteUser } = S(config)

const createdUser = await createUser(args)

const updatedUser = await updateUser(args)

const deletedUser = await deleteUser(args)

Check the logs of your serverless library:

$ s logs
Today at 12:02:14 PM Function Called: createUser
Today at 12:02:14 PM Created User eahefnawy
Today at 12:25:59 PM Function Called: updateUser
Today at 12:25:59 PM Updated User eahefnawy
Today at 12:34:12 PM Function Called: deleteUser
Today at 12:34:12 PM Deleted User eahefnawy

Pro Tip: Changing the name or the region results in a new SID. You can make use of environment variables to create different stages based on the library name:

const config = {
  name: `users-${process.env.S_STAGE}`
}

module.exports = { config }