sdk-go | Testground : SDK for developing test plans in Go | SDK library

Looking at the Using global state section in the official AWS Lambda function handler in Go doc https://docs.aws.amazon.com/lambda/latest/dg/golang-handler.html

suggests to initialise all global state in func init() i.e. Any package level vars which we want to share across multiple lambda invocations go here.
And my understanding is that this initialisation is done once per lambda container start (i.e cold start).

My question is, is it possible to do the same using func main() instead of func init().
Using func init() basically makes my handler function (func LambdaHandler) non unit-testable due to side-effects from func init() running.
Moving the func init() code to func main() seems to solve this easily.
Are there any side effects to using func main() vs func init()

Code Example

Using func init()

The documentation specifies this code to activate a factor:

I have a log file containing one JSON record per line.

When I try to initialize the input variable to do a PutItem on DynamoDB table using aws go sdk v2, it gives me an error - missing type in composite literal. I looked at the struct PutItemInput here - https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/dynamodb@v1.2.2#PutItemInput I don't understand how to get rid of this error? id is the partition key in mytable

I'm having a problem downloading large files from an AWS S3 bucket using the golang client, I'm not an expert with golang so I would appreciate any help.

I'm creating a simple API that expose an endpoint using gin-gonic framework, when someone sends a request to that endpoint the app download a huge CSV file from an AWS S3 bucket and save the contents of the file in a local DB.

When the file size is 200 mb it works correctly but with bigger files, say 500 mb, I start getting out of memory errors.

I'm using this portion of code to create the session and donwload the file:

I'm putting and reading files to S3 using the AWS golang v2 SDK. Locally I am using local stack and thus need to set the param S3ForcePathStyle. But, I can't find where to set this parameter in the config.

This is what my config looks like:

I am attempting to create an AWS Lambda with Go, but I am getting an error when compiling. I have already run go get for the lambda dependency and the package resolves, just not the Start method that I see in examples such as: https://docs.aws.amazon.com/lambda/latest/dg/golang-handler.html

If anyone has any insight as to why this is happening I would greatly appreciate it, thank you. Also, please let me know if there is anything else I can add that would be beneficial in solving this.

Build error:

i am working with aws-sdk-v2 and I want to make a minimum working example using "secretsmanager" service.

I am trying to follow the steps in this similiar example which is using "kms" service.

here is my script:

I'm trying to migrate from aws-sdk-go to aws-sdk-go-v2. But, I am using localstack locally to mimic some aws services such as sqs and s3. I'm not sure how to configure the new sdk to use the localstack endpoint instead of the real one.

For example, in the v1 SDK I can point it to localstack by setting the endpoint here: