# AWS SAM transform
[](https://github.com/aws/serverless-application-model/actions/workflows/build.yml)
[](https://github.com/aws/serverless-application-model/actions/workflows/schema.yml)
[](https://pypi.org/project/aws-sam-translator/)
[](https://pypi.org/project/aws-sam-translator/)
[](https://gitpod.io/#https://github.com/aws/serverless-application-model.git)
The [AWS Serverless Application Model](https://aws.amazon.com/serverless/sam/) (AWS SAM) transform is a [AWS CloudFormation macro](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-macros.html) that transforms [SAM templates](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-specification-template-anatomy.html) into [CloudFormation templates](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-anatomy.html).
To use the SAM transform, add `AWS::Serverless-2016-10-31` to the [`Transform` section](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/transform-section-structure.html) of your CloudFormation template.
Benefits of using the SAM transform include:
- Built-in best practices and sane defaults.
- Local testing and debugging with the [AWS SAM CLI](https://github.com/aws/aws-sam-cli).
- Extension of the CloudFormation template syntax.
## Getting started
Save the following as `template.yaml`:
```yaml
Transform: AWS::Serverless-2016-10-31
Resources:
MyFunction:
Type: AWS::Serverless::Function
Properties:
Runtime: nodejs18.x
Handler: index.handler
InlineCode: |
exports.handler = async (event) => {
console.log(event);
}
```
And deploy it with the [SAM CLI](https://github.com/aws/aws-sam-cli):
```bash
sam sync --stack-name sam-app
```
The [`AWS::Serverless::Function`](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-resource-function.html) resource will create a [AWS Lambda](https://aws.amazon.com/lambda/) function that logs [events](https://docs.aws.amazon.com/lambda/latest/dg/gettingstarted-concepts.html#gettingstarted-concepts-event) it receives.
Under the hood, the template is transformed into the JSON equivalent of the following CloudFormation template:
```yaml
Resources:
MyFunction:
Type: AWS::Lambda::Function
Properties:
Code:
ZipFile: |
exports.handler = async (event) => {
console.log(event);
}
Handler: index.handler
Role: !GetAtt MyFunctionRole.Arn
Runtime: nodejs18.x
Tags:
- Key: lambda:createdBy
Value: SAM
MyFunctionRole:
Type: AWS::IAM::Role
Properties:
AssumeRolePolicyDocument:
Version: "2012-10-17"
Statement:
- Action:
- sts:AssumeRole
Effect: Allow
Principal:
Service:
- lambda.amazonaws.com
ManagedPolicyArns:
- arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
Tags:
- Key: lambda:createdBy
Value: SAM
```
For a more thorough introduction, see the [this tutorial](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-getting-started-hello-world.html) in the [Developer Guide](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/what-is-sam.html).
## Contributing
### Setting up development environment
You'll need to have Python 3.8+ installed.
Create a [virtual environment](https://docs.python.org/3/library/venv.html):
```bash
python3 -m venv .venv
source .venv/bin/activate
```
Set up dependencies:
```bash
make init
```
Run tests:
```bash
make pr
```
See [`DEVELOPMENT_GUIDE.md`](DEVELOPMENT_GUIDE.md) for further development instructions, and [`CONTRIBUTING.md`](CONTRIBUTING.md) for the contributing guidelines.
## Getting help
The best way to interact with the team is through GitHub. You can either [create an issue](https://github.com/aws/serverless-application-model/issues/new/choose) or [start a discussion](https://github.com/aws/serverless-application-model/discussions).
You can also join the [`#samdev` channel](https://join.slack.com/t/awsdevelopers/shared_invite/zt-yryddays-C9fkWrmguDv0h2EEDzCqvw) on Slack.
## Learn more
### Workshops and tutorials
- [The Complete AWS SAM Workshop](https://catalog.workshops.aws/complete-aws-sam)
- [AWS Serverless Developer Experience Workshop](https://catalog.us-east-1.prod.workshops.aws/workshops/9a27e484-7336-4ed0-8f90-f2747e4ac65c/en-US)
- [Deploying a "Hello, World!" application](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-getting-started-hello-world.html)
- [Testing in the cloud using the SAM CLI](https://aws.amazon.com/blogs/compute/accelerating-serverless-development-with-aws-sam-accelerate/)
### Documentation
- [SAM Developer Guide](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/what-is-sam.html)
- [SAM template specification](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-specification.html)
- [SAM connectors](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/managing-permissions-connectors.html)
- [SAM policy templates](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-policy-templates.html)
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"description": "# AWS SAM transform\n\n[](https://github.com/aws/serverless-application-model/actions/workflows/build.yml)\n[](https://github.com/aws/serverless-application-model/actions/workflows/schema.yml)\n[](https://pypi.org/project/aws-sam-translator/)\n[](https://pypi.org/project/aws-sam-translator/)\n[](https://gitpod.io/#https://github.com/aws/serverless-application-model.git)\n\nThe [AWS Serverless Application Model](https://aws.amazon.com/serverless/sam/) (AWS SAM) transform is a [AWS CloudFormation macro](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-macros.html) that transforms [SAM templates](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-specification-template-anatomy.html) into [CloudFormation templates](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-anatomy.html).\n\nTo use the SAM transform, add `AWS::Serverless-2016-10-31` to the [`Transform` section](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/transform-section-structure.html) of your CloudFormation template.\n\nBenefits of using the SAM transform include:\n\n- Built-in best practices and sane defaults.\n- Local testing and debugging with the [AWS SAM CLI](https://github.com/aws/aws-sam-cli).\n- Extension of the CloudFormation template syntax.\n\n## Getting started\n\nSave the following as `template.yaml`:\n\n```yaml\nTransform: AWS::Serverless-2016-10-31\nResources:\n MyFunction:\n Type: AWS::Serverless::Function\n Properties:\n Runtime: nodejs18.x\n Handler: index.handler\n InlineCode: |\n exports.handler = async (event) => {\n console.log(event);\n }\n```\n\nAnd deploy it with the [SAM CLI](https://github.com/aws/aws-sam-cli):\n\n```bash\nsam sync --stack-name sam-app\n```\n\nThe [`AWS::Serverless::Function`](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-resource-function.html) resource will create a [AWS Lambda](https://aws.amazon.com/lambda/) function that logs [events](https://docs.aws.amazon.com/lambda/latest/dg/gettingstarted-concepts.html#gettingstarted-concepts-event) it receives.\n\nUnder the hood, the template is transformed into the JSON equivalent of the following CloudFormation template:\n\n```yaml\nResources:\n MyFunction:\n Type: AWS::Lambda::Function\n Properties:\n Code:\n ZipFile: |\n exports.handler = async (event) => {\n console.log(event);\n }\n Handler: index.handler\n Role: !GetAtt MyFunctionRole.Arn\n Runtime: nodejs18.x\n Tags:\n - Key: lambda:createdBy\n Value: SAM\n MyFunctionRole:\n Type: AWS::IAM::Role\n Properties:\n AssumeRolePolicyDocument:\n Version: \"2012-10-17\"\n Statement:\n - Action:\n - sts:AssumeRole\n Effect: Allow\n Principal:\n Service:\n - lambda.amazonaws.com\n ManagedPolicyArns:\n - arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole\n Tags:\n - Key: lambda:createdBy\n Value: SAM\n```\n\nFor a more thorough introduction, see the [this tutorial](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-getting-started-hello-world.html) in the [Developer Guide](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/what-is-sam.html).\n\n## Contributing\n\n### Setting up development environment\n\nYou'll need to have Python 3.8+ installed.\n\nCreate a [virtual environment](https://docs.python.org/3/library/venv.html):\n\n```bash\npython3 -m venv .venv\nsource .venv/bin/activate\n```\n\nSet up dependencies:\n\n```bash\nmake init\n```\n\nRun tests:\n\n```bash\nmake pr\n ```\n \nSee [`DEVELOPMENT_GUIDE.md`](DEVELOPMENT_GUIDE.md) for further development instructions, and [`CONTRIBUTING.md`](CONTRIBUTING.md) for the contributing guidelines.\n\n## Getting help\n\nThe best way to interact with the team is through GitHub. You can either [create an issue](https://github.com/aws/serverless-application-model/issues/new/choose) or [start a discussion](https://github.com/aws/serverless-application-model/discussions).\n\nYou can also join the [`#samdev` channel](https://join.slack.com/t/awsdevelopers/shared_invite/zt-yryddays-C9fkWrmguDv0h2EEDzCqvw) on Slack.\n\n## Learn more\n\n### Workshops and tutorials\n\n- [The Complete AWS SAM Workshop](https://catalog.workshops.aws/complete-aws-sam)\n- [AWS Serverless Developer Experience Workshop](https://catalog.us-east-1.prod.workshops.aws/workshops/9a27e484-7336-4ed0-8f90-f2747e4ac65c/en-US)\n- [Deploying a \"Hello, World!\" application](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-getting-started-hello-world.html)\n- [Testing in the cloud using the SAM CLI](https://aws.amazon.com/blogs/compute/accelerating-serverless-development-with-aws-sam-accelerate/)\n\n### Documentation\n\n- [SAM Developer Guide](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/what-is-sam.html)\n- [SAM template specification](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-specification.html)\n- [SAM connectors](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/managing-permissions-connectors.html)\n- [SAM policy templates](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-policy-templates.html)\n",
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