CDK + SAM for local lambda devel

gen_sam_template.sh

#!/bin/sh

# Because I use layers, referenced by a SSM Param I need to replace
# that in the generated template

export LAYERARN="arn:aws:lambda:eu-west-1:xxx:layer:YYYY:1";
export LAYERMATCH="/layers/baseLayer" # <- Param name

if [ -z "$STACK" ]
then
  echo "Usage: STACK=xxx gen_sam_template.sh"
else
  cdk synth $STACK --no-staging > template.yaml

  perl -pi -e 's/$ENV{LAYERMATCH}/$ENV{LAYERARN}/ge' template.yaml

  echo "template.yaml created and LayerArn set to: $LAYERARN"
fi

run_local.sh

#!/bin/sh

## Usage: AWS_REGION=XXX AWS_PROFILE=YYY ./run_local.sh
## Note: must be from same dir as template.yaml
## which is generated using the gen_sam_template.sh

# Get from template.yaml ( see also https://docs.aws.amazon.com/cdk/latest/guide/tools.html#sam )
FUNCTION_REFERENCE=XXXXXXXXX

## Create user specific files that can be put into version control, but not
## step on each other's toes!
export ENVFILE="$USER-env.json"
export EVENTFILE="$USER-event.json"

# Run
sam local invoke --env-vars $ENVFILE --event $EVENTFILE \
     --region $AWS_REGION --profile $AWS_PROFILE $FUNCTION_REFERENCE;

YOURUSER-env.json

{
  "FUNCTION_REFERENCE_FROM_TEMPLATE": {
    "SOME_ENV_KEY: "and-the-value-a-bucket-name-for-example"
  }
}

YOURUSER-event.json

{}