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Ran 29 Sep 2020 03:36AM UTC

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Build # 35682

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push

travis-ci-com

Committed by

web-flow

Commit Message

Add support for `.pyi` type stubs (including for first-party) (#10759)

There are two use cases for writing `.pyi` type stubs:

1) Writing bindings for third party libraries.
2) Writing stubs for your own code because you prefer it over using type hints/comments.

This PR adds support for both use cases. We allow Python targets to now include `.pyi` files, and update the default globs for `python_library` and `python_tests` to include them. 

We also teach dependency inference about `.pyi` files. For third party reqs, we infer a dep on both the req and the `.pyi` file. For first party stubs, we infer a dep on both the `.py` and `.pyi` files.

Most of our Python functionality works correctly without changes for `.pyi` files, but we have to teach Pytest to not try running over `.pyi` files if they show up in `python_tests` targets, just like we special case `conftest.py`. We also update how we call MyPy; if there is a `.pyi` file and `.py` file, the `.pyi` file takes precedence; otherwise, MyPy would error.

[ci skip-rust]
[ci skip-build-wheels]

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Jobs

ID	Job ID	Ran	Files	Coverage
4	35682.4 (PANTS_CONFIG_FILES="${TRAVIS_BUILD_DIR}/pants.travis-ci.toml" PANTS_DYNAMIC_UI=false LC_ALL="en_US.UTF-8" AWS_BUCKET=ci-public.pantsbuild.org BOOTSTRAPPED_PEX_KEY_PREFIX=daily/${TRAVIS_BUILD_NUMBER}/${TRAVIS_BUILD_ID}/pants.pex NATIVE_ENGINE_SO_KEY_PREFIX=monthly/native_engine_so PYENV_PY27_VERSION=2.7.18 PYENV_PY36_VERSION=3.6.10 PYENV_PY37_VERSION=3.7.7 PYENV_PY38_VERSION=3.8.3 PYENV_ROOT_OSX=${HOME}/.pants_pyenv PYENV_ROOT="${PYENV_ROOT:-${PYENV_ROOT_OSX}}" PATH="${PYENV_ROOT}/shims:${PATH}" AWS_CLI_ROOT="${HOME}/.aws_cli" AWS_ACCESS_KEY_ID__TO_BE_REEXPORTED_ON_DEPLOYS=AKIAV6A6G7RQ2HFZ5KP7 AWS_SECRET_ACCESS_KEY=[secure] RUST_BACKTRACE="all" BOOTSTRAPPED_PEX_KEY_SUFFIX=py36.linux PANTS_REMOTE_CA_CERTS_PATH=/usr/lib/google-cloud-sdk/lib/third_party/grpc/_cython/_credentials/roots.pem CACHE_NAME=python_tests.py36)	29 Sep 2020 03:36AM UTC	0	0.0	Travis Job 35682.4

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