Publish AWS Lambda Layer for Python Package with 1 Command ⚡️

publish-lambda-layer.sh

#!/bin/bash

# EXAMPLE USAGE: ./publish-lambda-layer.sh numpy

# check if a package name was provided
if [ -z "$1" ]; then
  echo "Please provide the name of the Python package you want to publish to Lambda as the first argument to this script."
  exit 1
fi

# install the AWS CLI if not already installed
if ! [ -x "$(command -v aws)" ]; then
  echo "Installing the AWS CLI..."
  pip3 install awscli --upgrade
fi

# create a deployment package
echo "Creating deployment package..."
package_name="$1"
package_zip="$package_name.zip"
mkdir $package_name
mkdir $package_name/python
pip3 install --target ./$package_name/python $package_name
cd $package_name
zip -r ../$package_name.zip .
cd ..

# get the package version
package_version=$(pip3 freeze | grep "$package_name==")

# publish the deployment package as a Lambda layer
echo "Publishing deployment package as a Lambda layer..."
aws lambda publish-layer-version \
  --layer-name "$package_name" \
  --zip-file fileb://"$package_zip" \
  --description "$package_name v$package_version" \
  --compatible-runtimes python3.10

# clean up
rm -rf "$package_name" "$package_zip"