complete

Complete Example

Multiple shell Lambda functions demonstrating layer composition — each function uses a different combination of tool layers from lambda-shell-layers.

What it demonstrates

• Composing multiple layers per function
• Pulling pre-built layer zips from GitHub Releases via source_url
• One handler file with multiple exported functions
• Each Lambda gets only the layers it needs

Architecture

handler.sh
├── weather()   → runtime
├── events()    → runtime + jq
├── id()        → runtime + jq + uuid
├── runtimes()  → runtime + jq + htmlq
├── status()    → runtime + jq + http-cli
└── qr()        → runtime + qrencode

All layers are fetched from GitHub Releases:

https://github.com/ql4b/lambda-shell-layers/releases/download/<version>/<tool>-<arch>-layer.zip

Usage

terraform init
terraform apply

Invoke each function:

aws lambda invoke --function-name shell-lambda-with-layers-weather /dev/stdout
aws lambda invoke --function-name shell-lambda-with-layers-events /dev/stdout
aws lambda invoke --function-name shell-lambda-with-layers-id /dev/stdout
aws lambda invoke --function-name shell-lambda-with-layers-runtimes /dev/stdout
aws lambda invoke --function-name shell-lambda-with-layers-status /dev/stdout
aws lambda invoke --function-name shell-lambda-with-layers-qr /dev/stdout

Functions

Function	Handler	Layers	Description
weather	handler.weather	runtime	curl only (built-in)
events	handler.events	runtime, jq	GitHub events parsed with jq
id	handler.id	runtime, jq, uuid	Generate UUID, return as JSON
runtimes	handler.runtimes	runtime, jq, htmlq	Scrape AWS docs for Lambda runtimes
status	handler.status	runtime, jq, http-cli	HTTP status check with http-cli
qr	handler.qr	runtime, qrencode	Generate QR code as ANSI art

Configuration

Switch architecture and layer version in main.tf:

locals {
  arch           = "x86_64" # arm64|x86_64
  layers_version = "v0.0.4"
}

All layers and functions will rebuild for the target architecture.