Prevent including test directory when installing package

[koirikivi]

pip install and python setup.py build also installed the tests directory to the environment. I'm not sure about what the best fix is, but this seems to do the trick and has also been suggested on the internet.

Example output before the fix, showing the error:

$ mkdir foo && pip install . --target foo && ls -l foo  # installing to venv (without --target) had the same problem
... output from pip ...
drwxr-xr-x  3 user user    96 Nov 25 22:25 __pycache__/
drwxr-xr-x 15 user user   480 Nov 25 22:25 graphql/
drwxr-xr-x  8 user user   256 Nov 25 22:25 graphql_core-3.1.2.dist-info/
drwxr-xr-x 12 user user   384 Nov 25 22:25 graphql_server/
drwxr-xr-x  9 user user   288 Nov 25 22:25 graphql_server-3.0.0b2-py3.8.egg-info/
drwxr-xr-x  7 user user   224 Nov 25 22:25 tests/
drwxr-xr-x  8 user user   256 Nov 25 22:25 typing_extensions-3.7.4.3.dist-info/
-rw-r--r--  1 user user 83727 Nov 25 22:25 typing_extensions.py

$ python setup.py build && ls -l build/lib/
running build
running build_py
creating build
creating build/lib
    1 Prevent including test directory when installing package
creating build/lib/graphql_server
copying graphql_server/version.py -> build/lib/graphql_server
copying graphql_server/error.py -> build/lib/graphql_server
copying graphql_server/__init__.py -> build/lib/graphql_server
copying graphql_server/render_graphiql.py -> build/lib/graphql_server
creating build/lib/graphql_server/flask
copying graphql_server/flask/__init__.py -> build/lib/graphql_server/flask
copying graphql_server/flask/graphqlview.py -> build/lib/graphql_server/flask
creating build/lib/graphql_server/aiohttp
    1 [core]
copying graphql_server/aiohttp/__init__.py -> build/lib/graphql_server/aiohttp
copying graphql_server/aiohttp/graphqlview.py -> build/lib/graphql_server/aiohttp
creating build/lib/graphql_server/quart
copying graphql_server/quart/__init__.py -> build/lib/graphql_server/quart
copying graphql_server/quart/graphqlview.py -> build/lib/graphql_server/quart
creating build/lib/graphql_server/webob
copying graphql_server/webob/__init__.py -> build/lib/graphql_server/webob
copying graphql_server/webob/graphqlview.py -> build/lib/graphql_server/webob
creating build/lib/graphql_server/sanic
copying graphql_server/sanic/__init__.py -> build/lib/graphql_server/sanic
copying graphql_server/sanic/graphqlview.py -> build/lib/graphql_server/sanic
creating build/lib/tests
creating build/lib/tests/flask
copying tests/flask/test_graphiqlview.py -> build/lib/tests/flask
copying tests/flask/test_graphqlview.py -> build/lib/tests/flask
copying tests/flask/__init__.py -> build/lib/tests/flask
copying tests/flask/app.py -> build/lib/tests/flask
copying tests/flask/schema.py -> build/lib/tests/flask
creating build/lib/tests/aiohttp
copying tests/aiohttp/test_graphiqlview.py -> build/lib/tests/aiohttp
copying tests/aiohttp/test_graphqlview.py -> build/lib/tests/aiohttp
copying tests/aiohttp/__init__.py -> build/lib/tests/aiohttp
copying tests/aiohttp/app.py -> build/lib/tests/aiohttp
copying tests/aiohttp/schema.py -> build/lib/tests/aiohttp
creating build/lib/tests/quart
copying tests/quart/test_graphiqlview.py -> build/lib/tests/quart
copying tests/quart/test_graphqlview.py -> build/lib/tests/quart
copying tests/quart/__init__.py -> build/lib/tests/quart
copying tests/quart/app.py -> build/lib/tests/quart
copying tests/quart/schema.py -> build/lib/tests/quart
creating build/lib/tests/webob
copying tests/webob/test_graphiqlview.py -> build/lib/tests/webob
copying tests/webob/test_graphqlview.py -> build/lib/tests/webob
copying tests/webob/__init__.py -> build/lib/tests/webob
copying tests/webob/app.py -> build/lib/tests/webob
copying tests/webob/schema.py -> build/lib/tests/webob
creating build/lib/tests/sanic
copying tests/sanic/test_graphiqlview.py -> build/lib/tests/sanic
copying tests/sanic/test_graphqlview.py -> build/lib/tests/sanic
copying tests/sanic/__init__.py -> build/lib/tests/sanic
copying tests/sanic/app.py -> build/lib/tests/sanic
copying tests/sanic/schema.py -> build/lib/tests/sanic
running egg_info
writing graphql_server.egg-info/PKG-INFO
writing dependency_links to graphql_server.egg-info/dependency_links.txt
writing requirements to graphql_server.egg-info/requires.txt
writing top-level names to graphql_server.egg-info/top_level.txt
reading manifest file 'graphql_server.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
no previously-included directories found matching 'bin'
warning: no previously-included files matching '*.py[co]' found anywhere in distribution
warning: no previously-included files matching '__pycache__' found anywhere in distribution
writing manifest file 'graphql_server.egg-info/SOURCES.txt'
total 0
drwxr-xr-x 11 user user 352 Nov 25 22:25 graphql_server/
drwxr-xr-x  7 user user 224 Nov 25 22:25 tests/