Lambda for listing s3 files

s3-file-list.js

const AWS = require('aws-sdk')
if (process.env.AWS_PROFILE) { // eslint-disable-line
  AWS.config.credentials = new AWS.SharedIniFileCredentials({
    profile: process.env.AWS_PROFILE // eslint-disable-line
  })
  AWS.config.logger = console
}
const s3 = new AWS.S3({ apiVersion: '2006-03-01' })
exports.handler = async(event, context) => {
    const objects = await s3.listObjects(event).promise();
    return objects.Contents.map((o) => o.Key)
}