Lambda used to deploy other lambdas

index.js

console.log('Preparing deployment function.')
var AWS = require('aws-sdk');
var lambda = new AWS.Lambda();
var lambdasToDeploy = JSON.parse(new Buffer(process.env.CONFIGURATION, 'base64').toString("ascii"));

exports.handler = function(event, context) {
    console.log('Running  deployment function for ' + JSON.stringify(lambdasToDeploy));
    key = event.Records[0].s3.object.key
    bucket = event.Records[0].s3.bucket.name
    version = event.Records[0].s3.object.versionId
    console.log("key" + key + "version" + version)
    lambdasToDeploy.forEach(function(lambdaToDeploy){
        if (key == lambdaToDeploy.key && version) {
            console.log("Uploading to lambda function: " + lambdaToDeploy.name + " using key " + key + " for version " + version);
            var params = {
                FunctionName: lambdaToDeploy.name,
                S3Key: key,
                S3Bucket: bucket,
                S3ObjectVersion: version
            };
            lambda.updateFunctionCode(params, function(err, data) {
                if (err) {
                    console.log(err, err.stack);
                    context.fail(err);
                } else {
                    console.log(data);
                }
            })
        }});
}

template.yaml

AWSTemplateFormatVersion: "2010-09-09"
Transform: 'AWS::Serverless-2016-10-31'
Resources:
  LambdaFunctionToDeploy:
      Type: "AWS::Serverless::Function"
      Properties:
        Handler: index.wopwop
        Runtime: nodejs4.3
        CodeUri: 's3://lambdas/awsome-code.zip'
        Policies:
          - AWSLambdaBasicExecutionRole
          - AWSLambdaExecutedateSNSTopic
        #Configured function
  LambdaDeploymentFunction:
      Type: "AWS::Serverless::Function"
      DependsOn: LambdaFunctionToDeploy
      Properties:
        Handler: index.handler
        Runtime: nodejs4.3
        CodeUri: '<code_uri>'
        Timeout: 60
        Policies:Policies:
          - Version: '2012-10-17'
            Statement:
              - Effect: "Allow"
                Action:
                  - "lambda:UpdateFunctionCode"
                Resource: !GetAtt LambdaFunctionToDeploy.Arn
              - Effect: "Allow"
                Action:
                  - "logs:*"
                Resource: "*"
              - Effect: "Allow"
                Action:
                  - "s3:GetObject"
                Resource: "arn:aws:s3:::<code_bucket>/*"
        Environment:
          Variables:
            CONFIGURATION:
              "Fn::Base64":
                !Sub |
                  [{"key":"awsome-code.zip","name":"${LambdaToDeploy}"}]
        Events:
          CodeUpdated:
            Type: S3
            Properties:
              Bucket: lambdas
              Events: s3:ObjectCreated:*