minor polishings in Makefile, add .gitignore

.gitignore

@@ -158,3 +158,6 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+
+
+.DS_Store

lambda-snowpark-connector/.gitignore

@@ -0,0 +1,3 @@
+libs/
+build/
+output.txt

lambda-snowpark-connector/Makefile

@@ -1,26 +1,30 @@
-install:
+usage:                    ## Show this help
+	@grep -Fh "##" $(MAKEFILE_LIST) | grep -Fv fgrep | sed -e 's/:.*##\s*/##/g' | awk -F'##' '{ printf "%-25s %s\n", $$1, $$2 }'
+
+install:     ## Install dependencies
 	pip3 install \
 		--platform manylinux2010_x86_64 \
 		--implementation cp \
 		--only-binary=:all: --upgrade \
-		--target . \
+		--target ./libs \
  		snowflake-connector-python==2.7.9 boto3==1.26.153 botocore==1.29.153
-
-zip:
-	zip -r function-py.zip .
 
-create-function:
+zip:        ## Create the Lambda zip archive
+	mkdir -p build
+	cp -r libs/* build/
+	(cd build && zip -q -r function-py.zip .)
+
+create-function:  ## Create the Lambda function in LocalStack
 	awslocal lambda create-function \
 	--function-name localstack-snowflake-lambda-example \
 	--runtime python3.10 \
 	--timeout 180 \
-	--zip-file fileb://function-py.zip \
+	--zip-file fileb://build/function-py.zip \
 	--handler handler.lambda_handler \
 	--role arn:aws:iam::000000000000:role/lambda-role
 
-local-invoke:
+local-invoke:   ## Invoke the Lambda locally
 	awslocal lambda invoke --function-name localstack-snowflake-lambda-example \
-	--cli-binary-format raw-in-base64-out \
 	--payload '{"body": "test" }' output.txt
 
 start-localstack: