update-lambda-code.sh

# tested with aws cli v1 and a webpack build

# this is the relative path to the folder that contains your build assets
BUILD_FOLDER=build

# you can improve upload speed by naming the files explicitely instead of all (.)
(cd $BUILD_FOLDER && zip bundle.zip .)

export AWS_PROFILE="${AWS_PROFILE:-default}"
echo "Using AWS Profile: $AWS_PROFILE"

# the following section tries to discover the function name. if you set an explicit one via FUNCTION_NAME, this section will be skipped.
if [[ -z "$FUNCTION_NAME" ]]; then
  if [[ -z "$FUNCTION_PREFIX" ]]; then
    echo "Please specify a FUNCTION_PREFIX or full FUNCTION_NAME!"
    exit 1
  fi
  FUNCTION_NAME=`aws lambda list-functions | grep -E -o "\"$FUNCTION_PREFIX.*\"" | tr -d '"'`
  echo "Discovered function name: $FUNCTION_NAME"
else
  echo "Using FUNCTION_NAME env var: $FUNCTION_NAME"
fi

# this is a manual check to confirm that the right function goes to the right account
read "continue?Are you sure that you want to deploy $FUNCTION_NAME to AWS_PROFILE $AWS_PROFILE? (y/N) "
if [[ "$continue" != 'y' ]]; then
  exit 0
fi

start=`date +%s`

aws lambda update-function-code --function-name $FUNCTION_NAME --zip-file fileb://$BUILD_FOLDER/bundle.zip --publish

end=`date +%s`

runtime=$((end-start))
echo "Deployed in $runtime seconds"