pythonRequirements.zip contains Mac .so files even with slim: true

[tibbe]

Are you certain it's a bug?

• [X] Yes, it looks like a bug

Are you using the latest plugin release?

• [X] Yes, I'm using the latest plugin release

Is there an existing issue for this?

• [X] I have searched existing issues, it hasn't been reported yet

Issue description

Looking for what's taking up so much space in our pythonRequirements.zip I found (Mac-specific) .so and .dylib files there:

-rwxr-xr-x  1 tibbe  wheel  3672864 Feb 15 14:42 ./python/PIL/.dylibs/libharfbuzz.0.dylib
-rw-r--r--  1 tibbe  wheel  3901268 Feb 15 14:42 ./python/googleapiclient/discovery_cache/documents/compute.v1.json
-rwxr-xr-x  1 tibbe  wheel  4097242 Feb 15 14:42 ./python/cryptography/hazmat/bindings/_rust.abi3.so
-rw-r--r--  1 tibbe  wheel  4143556 Feb 15 14:42 ./python/googleapiclient/discovery_cache/documents/compute.beta.json
-rw-r--r--  1 tibbe  wheel  4720186 Feb 15 14:42 ./python/googleapiclient/discovery_cache/documents/compute.alpha.json
-rw-r--r--  1 tibbe  wheel  5211997 Feb 15 14:42 ./python/googleapiclient/discovery_cache/documents/contentwarehouse.v1.json
-rwxr-xr-x  1 tibbe  wheel  11614701 Feb 15 14:42 ./python/cryptography/hazmat/bindings/_openssl.abi3.so
-rwxr-xr-x  1 tibbe  wheel  12469896 Feb 15 14:42 ./python/grpc/_cython/cygrpc.cpython-39-darwin.so

Sending these to Lambda doesn't make sense, as Lambda runs on Linux x86-64/ARM and not Mac ARM. Why are these files included?

Service configuration (serverless.yml) content

pythonRequirements:
    pythonBin: python3
    slim: true
    layer: true
    noDeploy:
      # Shipped in a separate layer:
      - Pillow


Project is proprietary so I cannot include the whole config.

Command name and used flags

serverless package

Command output

N/A

Environment information

✗ serverless --version
Running "serverless" from node_modules
Framework Core: 3.26.0 (local) 3.26.0 (global)
Plugin: 6.2.2
SDK: 4.3.2

[hrist0stoichev]

slim only removes **/*.py[c|o], **/__pycache__*, and **/*.dist-info* by default. The .so files are trimmed only, not removed. If you want to remove anything else you can use:

slimPatterns:
  - '**/*.so'
  - '**/*.dylib'