Exclude pre-compiled packages matching excludes list

[MickaelBergem]

Description

There are some locally installed packages I don't want to install on my lambda function, such as coverage or mypy. They are in the excludes but somehow are still included in the final ZIP. This change prevents ignored packages from being included in the final ZIP file, resulting for me in a 30% reduction of the lambda size.

This works fine for me locally using Python3.7 and Python3.8

One caveat I just discovered is that patterns (like packagename*) will not be interpreted and will be used as plain strings.

Resulting output:

Downloading and installing dependencies.. - psycopg2==2.7.7: Using locally cached manylinux wheel - pip==19.0.3: ignored, skipping... - mypy==0.720: ignored, skipping... - markupsafe==1.1.1: Using locally cached manylinux wheel - ipdb==0.12.3: ignored, skipping... - cryptography==2.8: Warning! Using precompiled lambda package version 1.9 instead! - coverage==4.5.4: ignored, skipping... - cffi==1.13.2: Using locally cached manylinux wheel - sqlite==python3: Using precompiled lambda package Packaging project as zip. 

GitHub Issues

I have not opened a GitHub issue first, I'm happy to do it if it's really required, but a PR likely describes more what I want to do :)

[coveralls]

Coverage increased (+0.08%) to 73.047% when pulling fa76166 on MickaelBergem:master into 80a6881 on Miserlou:master.

[coveralls]

Coverage increased (+0.08%) to 73.047% when pulling fa76166 on MickaelBergem:master into 80a6881 on Miserlou:master.