# AWS CodeCommit to S3

This pattern implements the solution outlined on the ["Automate event-driven backups from CodeCommit to Amazon S3 using CodeBuild and CloudWatch Events" Presciptive Guidance](https://docs.aws.amazon.com/prescriptive-guidance/latest/patterns/automate-event-driven-backups-from-codecommit-to-amazon-s3-using-codebuild-and-cloudwatch-events.html#automate-event-driven-backups-from-codecommit-to-amazon-s3-using-codebuild-and-cloudwatch-events-tools). 

Learn more about this pattern at Serverless Land Patterns: https://serverlessland.com/patterns/codecommit-s3.

Important: this application uses various AWS services and there are costs associated with these services after the Free Tier usage - please see the [AWS Pricing page](https://aws.amazon.com/pricing/) for details. You are responsible for any AWS costs incurred. No warranty is implied in this example.

## Requirements

* [Create an AWS account](https://portal.aws.amazon.com/gp/aws/developer/registration/index.html) if you do not already have one and log in. The IAM user that you use must have sufficient permissions to make necessary AWS service calls and manage AWS resources.
* [AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2.html) installed and configured
* [Git Installed](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
* [AWS Serverless Application Model](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install.html) (AWS SAM) installed

## Deployment Instructions

1. Create a new directory, navigate to that directory in a terminal and clone the GitHub repository:
    ``` 
    git clone https://github.com/aws-samples/serverless-patterns
    ```
1. Change directory to the pattern directory:
    ```
    cd codecommit-s3
    ```
1. From the command line, use AWS SAM to deploy the AWS resources for the pattern as specified in the template.yml file:
    ```
    sam deploy --guided  --capabilities CAPABILITY_NAMED_IAM
    ```
1. During the prompts:
    * Enter a stack name
    * Enter the desired AWS Region
    * Allow SAM CLI to create IAM roles with the required permissions.

    Once you have run `sam deploy --guided` mode once and saved arguments to a configuration file (samconfig.toml), you can use `sam deploy` in future to use these defaults.

1. Note the outputs from the SAM deployment process. These contain the resource names and/or ARNs which are used for testing.

## How it works

When the content of a CodeCommit repository is modified (for example, by a git push command), it notifies EventBridge of the repository change. EventBridge then invokes AWS CodeBuild with the CodeCommit repository information. CodeBuild clones the entire CodeCommit repository, packages it into a .zip file and uploads the it to an S3 bucket.
During deployment, the pattern uses a Lambda function and a CloudFormation Custom Resource to create the CodeBuild's buildspec.yml template.

## Testing

1. Create or use a pre-existing CodeCommit repository
1. Update the repository content
1. Verify that the zip file is created on the backup bucket, under the folder `repositories`


## Cleanup
 
1. Delete the stack
    ```bash
    aws cloudformation delete-stack --stack-name STACK_NAME
    ```
1. Confirm the stack has been deleted
    ```bash
    aws cloudformation list-stacks --query "StackSummaries[?contains(StackName,'STACK_NAME')].StackStatus"
    ```
----
Copyright 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.

SPDX-License-Identifier: MIT-0