This utility aims to provide a simple, repeatable, and efficient process for deploying a Python package as a Lambda.

To encourage separating infrequently changing Python dependencies in a distinct “requirements” layer, by default Drover requires a list of regular expressions to define which files to include in the Lambda function; all other files are placed in a requirements layer that is then attached to the Lambda function.

Next, Drover generates and stores hashes for both the Lambda function and the requirements layer. This allows Drover to avoid redundantly updating the Lambda function and/or requirements layer if no package contents have changed.

As much as possible, Drover avoids altering existing infrastructure. Infrastructure utilities such as Terraform may be used to create a Lambda and manage its surrounding resources and Dover may be used to update the Lambda function as well as its layers.

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