Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

0.2.0 - 2026-11-10

AWS.Lambda.Runtime.Release.lambda/1 — returns the whole release configuration (include_erts: false, stripped beams, the bootstrap entrypoint and the vm.args/env.sh templates). Any mix release option overrides its defaults, and it accepts :strip_iex, :before_steps and :after_steps. Declare it lazily: releases: [lambda: fn -> AWS.Lambda.Runtime.Release.lambda() end].
AWS.Lambda.Runtime.Release.strip_iex/1 — release step removing IEx from the package.
bootstrap exits with a clear error when bin/lambda is missing, i.e. when the release isn't named lambda.
The lambda-layer-elixir image ships git, tar and zip.

mix aws_lambda.build pulls the multi-arch lambda-layer-elixir:<elixir>-erlang-<erlang> image and selects the architecture with --platform, instead of always pulling the -arm64 tag.
bootstrap and the vm.args/env.sh templates are applied through rel_templates_path and its overlays directory, instead of being copied by custom steps.

AWS.Lambda.Runtime.Release.copy_bootstrap/1 and AWS.Lambda.Runtime.Release.copy_release_files/1 — replace the release configuration in mix.exs with AWS.Lambda.Runtime.Release.lambda/1.

Docker build scripts (docker/erlang, docker/elixir) and READMEs for building the lambda-layer-erlang and lambda-layer-elixir images that mix aws_lambda.build pulls from.
mix aws_lambda.build — --dep/-d flag to install extra dnf packages (e.g. git) in the build container alongside tar.

mix aws_lambda.build — colorized, more consistent step output; internal cleanup.

AWS.Lambda.Runtime.MixRelease (priv/mix/release.exs) — the release steps it configured are documented directly in the README instead.

AWS.Lambda.Runtime — the custom runtime loop: long-polls the Lambda Runtime API, dispatches each invocation to your handler within a supervised, deadline-bounded task, and reports the result or failure back to Lambda without crashing the sandbox.
AWS.Lambda.Runtime.API — a dependency-free :inets/:httpc client for the Lambda Runtime API (2018-06-01).
AWS.Lambda.Runtime.Context — per-invocation context assembled from the Lambda-Runtime-* response headers and the function's environment.
AWS.Lambda.Runtime.Handler — the behaviour your function implements, plus resolution of the _HANDLER environment variable / compile-time config.
AWS.Lambda.Runtime.Application — the OTP application supervising the runtime loop, with a config :aws_lambda_runtime, start_runtime: false escape hatch for environments (like this library's own test suite) that shouldn't start it.
AWS.Lambda.Runtime.MixRelease and AWS.Lambda.Runtime.Release — mix release configuration and steps that package a function for Lambda's provided.al2023 runtime, including the bootstrap entrypoint and Lambda-tuned vm.args/env.sh.
mix aws_lambda.build — packages a function's Lambda release inside the Elixir builder Docker image and downloads the resulting deployment zip.