Move CI from CircleCI to Github Actions #1

	name: Lint checks release version of PyTorch on Linux CPU

	on:
	pull_request:
	push:
	branches:
	- main
	workflow_dispatch:

	jobs:
	lint:
	strategy:
	matrix:
	python_version: ["3.9"]
	fail-fast: false
	uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
	with:
	runner: linux.2xlarge
	repository: pytorch/opacus
	timeout: 60
	script: \|
	echo '::group::Create conda env with correct Python version'
	set -x
	PYTHON_VERSION="${{ matrix.python_version }}"
	conda create --yes --quiet -n test python="${PYTHON_VERSION}"
	conda activate test
	python --version \| grep "${PYTHON_VERSION}"
	echo '::endgroup::'

	echo '::group::Install dependencies via pip, including extra deps.'
	./scripts/install_via_pip.sh
	echo '::endgroup::'

	echo '::group::Lint with flake8'
	flake8 --config ./.github/flake8_config.ini
	echo '::endgroup::'

	echo '::group::Lint with black'
	black --check --diff --color .
	echo '::endgroup::'

	echo '::group::Check import order with isort'
	isort -v -l 88 -o opacus --lines-after-imports 2 -m 3 --trailing-comma --check-only .
	echo '::endgroup::'

Provide feedback