terraform-aws-lambda-layer-build

---

Terraform module that assists in building a lambda layer for your projects external dependencies. Builds are automatically done within AWS-supported docker build containers (obviously docker is required).

Supported runtimes / package managers are:

• Python
  • poetry
• Nodejs
  • npm
  • yarn

Example:

module "dependencies" {
  source = "github.com/atistler/terraform-aws-lambda-layer-build.git"
  layer_name = "my-dependencies"
  package_lock_file = "${path.cwd}/../poetry.lock"
  package_manager = "poetry"
  runtime = "python3.6"
  pre_install_docker_commands = ["yum install -y postgresql-devel"]
}

resource "aws_lambda_function" "tagger" {
  function_name = "my-function"
  role = "some_role_arn"
  s3_bucket = "some_bucket"
  s3_key = "some_key"
  handler = "handler.lambda_handler"
  runtime = "python3.6"
  layers = [
    module.dependencies.layer_arn
  ]
}

Providers

Name	Version
aws	>=2.10.0
external	n/a
null	n/a

Inputs

Name	Description	Type	Default	Required
build_command	The command to run to create the Lambda package zip file	string	"python build.py '$filename' '$runtime' '$package_manager' '$package_lock_file' '$pre_install_docker_commands' '$extra_package_manager_args' '$docker_image'"	no
build_paths	The files or directories used by the build command, to trigger new Lambda package builds whenever build scripts change	list(string)	[ "build.py" ]	no
docker_image	Docker image to use to run package_manager in, if left empty, an AWS docker build container will be used based off of the runtime	string	""	no
extra_package_manager_args	Extra arguments to pass to the given package manager install command	string	""	no
layer_name	The name to give the lambda layer	string	n/a	yes
package_lock_file	The file path to your package_manager specific package_lock_file. In the case of npm that would be package-lock.json, yarn would be yarn.lock, and poetry would be poetry.lock	string	n/a	yes
package_manager	The package manager to use. Nodejs supported package_managers are npm and yarn. Python currently supports poetry	string	n/a	yes
pre_install_docker_commands	List of commands to run in your docker container before running the package manager install	list(string)	[]	no
runtime	The lambda runtime to use (python3.7, nodejs10.x, etc). In the case that a docker_image or docker_file is NOT used, the runtime will be used to determine the AWS build docker image to use.	string	n/a	yes

Outputs

Name	Description
layer_arn	The ARN of the Lambda layer