Creating AWS Lambda functions in Python with dependencies

This assumes you have a package called mylambda and a requirements.txt file listing your dependencies.

build.sh:

#!/bin/sh

tmp_dir=$(mktemp -d)
trap "rm -rf '$tmp_dir'" EXIT

pip install -r requirements.txt -t "$tmp_dir"
cp -R mylambda "$tmp_dir/mylambda"

here=$(pwd)
(
    cd $tmp_dir
    zip -r -9 $here/lambda.zip .
)

For installation of the dependencies to work, you need this setup.cfg file in the same directory as build.sh so pip can find it:

[install]
prefix=