TypeScript and Lambda Serverless Project Limit

TypeScript and Lambda Serverless Project Limit

Recently, our project deployment met this exception while deploy
An error occurred: DevicePairingUpdatesLambdaFunction - Unzipped size must be smaller than 262144000 bytes (Service: AWSLambda; Status Code: 400; Error Code: InvalidParameterValueException; Request ID:xxxxxxx-11e8-81e6-xxxxxxx).

Look at the limitation for lambda in detail here
https://docs.aws.amazon.com/lambda/latest/dg/limits.html#limits-list
Lambda function deployment package size (compressed .zip/.jar file). 50MB
Size of code/dependencies that you can zip into a deployment package (uncompressed .zip/.jar size). 250

Currently, our projects are packaged and deployed in 2 different ways.
#1 serverless-plugin-typescript plugin
No webpack, no compress map file generated

Run the command >sls package and check the directory .serverless, there will be a zip file, unzip that, the structure will be as follow:
drwxr-xr-x  168 hluo  staff  5376 Sep  6 16:36 node_modules
-rw-r--r--    1 hluo  staff  1017 Dec 31  1979 package.json
drwxr-xr-x    6 hluo  staff   192 Sep  6 16:37 src

The good part for this plugin is that, all the shared dependencies will be under node_modules, the source codes in src directory are all small
-rw-r--r--  1 hluo  staff  2329 Dec 31  1979 accessToken.js
-rw-r--r--  1 hluo  staff  4686 Dec 31  1979 getVCSettings.js
-rw-r--r--  1 hluo  staff  2208 Dec 31  1979 handler.js
-rw-r--r--  1 hluo  staff  4413 Dec 31  1979 utils.js

So in this case, if you have 20 lambda in this serverless.yaml together, you will have all shared dependencies in node_modules, all lambda codes in src directory.
The bad side for this is that all these javascript files are normal files, no compress.

#2 serverless-webpack plugin
Compress map file generated for each lambda functions

Run the command >sls package and check the directory .serverless, there will be a zip file, unzip that, the structure will be as follow:
-rw-r--r--  1 hluo  staff   4.1M Jan  1  1980 handler.js
-rw-r--r--  1 hluo  staff   5.6M Jan  1  1980 handler.js.map

In this way, there is no node_modules, all related javascript dependencies will be compressed and packaged into the lambda js and js.map files.
The good thing is  the files are compressed, so it is smaller than #1 comparing per lambda. But the downside for this plugin is you have no where to share dependencies. So if you have 20 lambda with similar dependencies in one serverless.yaml, you will have 20 bigger js and js.map files, that is why my size get over 50MB.

For example
-rw-r--r--  1 hluo  staff   7.3M Jan  1  1980 deleteDevicePairing.js
-rw-r--r--  1 hluo  staff    10M Jan  1  1980 deleteDevicePairing.js.map
-rw-r--r--  1 hluo  staff   7.3M Jan  1  1980 getPairedDevices.js
-rw-r--r--  1 hluo  staff    10M Jan  1  1980 getPairedDevices.js.map
-rw-r--r--  1 hluo  staff   7.3M Jan  1  1980 updateDevicePairing.js
-rw-r--r--  1 hluo  staff    10M Jan  1  1980 updateDevicePairing.js.map
-rw-r--r--  1 hluo  staff   7.3M Jan  1  1980 updateDeviceSystemName.js
-rw-r--r--  1 hluo  staff    10M Jan  1  1980 updateDeviceSystemName.js.map

I do not know if there are other solutions or plugins, but this is what I found in current situations.

References:
https://docs.aws.amazon.com/lambda/latest/dg/limits.html#limits-list