[lambda] specify multiple folders as a single lambda asset

[ahzia]

Motivation: Right now in order to define a lambda function you need to set where the code resides, e.g. code: lambda.Code.asset('lambda'). Sometimes you would like to define multiple folders, for example, the actual code and node_modules, although packing can be done as a preprocessing step before actually running CDK deploy, it would be cleaner to do it as part of the lambda configuration.
Design aspect:
added a new function fromMultiAsset which takes an array of paths and archives it inside a zip file, then it calls AssetCode() and passes this new file.

closes #984

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[gitpod-io]

[rix0rrr]

I'm sorry, this is not what assets are for, and CDK is not a build tool. If you have a complex asset build step, write a shell script that will assemble your asset from your various source locations into a single directory, then reference that in your CDK app. Either that, or use the aws-lambda-nodejs module.

[ahzia]

I'm sorry, this is not what assets are for, and CDK is not a build tool. If you have a complex asset build step, write a shell script that will assemble your asset from your various source locations into a single directory, then reference that in your CDK app. Either that or use the aws-lambda-nodejs module.

Thanks for your reply @rix0rrr
My solution was based on the issue #984 which is active since 2018 and many people have reached the same issue since then, it was labeled as P1 and feature/enhancement.
kindly take a look at the issue.

[kellertk]

@rix0rrr If we don't want to implement this we should close #984 as well. It's one of the more upvoted and reacted on feature requests.

[aws-cdk-automation]

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[ahzia]

Closed this and opened a new Pull for this: