[skip ci] Add simple local actions runner (#56439)
Summary:
This pulls out shell scripts from an action and runs them locally as a first pass at https://github.com/pytorch/pytorch/issues/55847. A helper script extracts specific steps in some order and runs them:
```bash
$ time -p make lint -j 5 # run lint with 5 CPUs
python scripts/actions_local_runner.py \
--file .github/workflows/lint.yml \
--job 'flake8-py3' \
--step 'Run flake8'
python scripts/actions_local_runner.py \
--file .github/workflows/lint.yml \
--job 'mypy' \
--step 'Run mypy'
python scripts/actions_local_runner.py \
--file .github/workflows/lint.yml \
--job 'quick-checks' \
--step 'Ensure no trailing spaces' \
--step 'Ensure no tabs' \
--step 'Ensure no non-breaking spaces' \
--step 'Ensure canonical include' \
--step 'Ensure no unqualified noqa' \
--step 'Ensure no direct cub include' \
--step 'Ensure correct trailing newlines'
python scripts/actions_local_runner.py \
--file .github/workflows/lint.yml \
--job 'cmakelint' \
--step 'Run cmakelint'
quick-checks: Ensure no direct cub include
quick-checks: Ensure canonical include
quick-checks: Ensure no unqualified noqa
quick-checks: Ensure no non-breaking spaces
quick-checks: Ensure no tabs
quick-checks: Ensure correct trailing newlines
cmakelint: Run cmakelint
quick-checks: Ensure no trailing spaces
mypy: Run mypy
Success: no issues found in 1316 source files
Success: no issues found in 56 source files
flake8-py3: Run flake8
./test.py:1:1: F401 'torch' imported but unused
real 13.89
user 199.63
sys 6.08
```
Mypy/flake8 are by far the slowest, but that's mostly just because they're wasting a bunch of work linting the entire repo.
In followup, we could/should:
* Improve ergonomics (i.e. no output unless there are errors)
* Speed up lint by only linting files changes between origin and HEAD
* Add clang-tidy
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56439
Reviewed By: samestep
Differential Revision: D27888027
Pulled By: driazati
fbshipit-source-id: d6f2a59a45e9d725566688bdac8e909210175996
