Make the CI stable (no random failures), faster (8 intel cpus) and better orchestrated #4346

	name: BetterTransformer / Python - Test

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	build:
	strategy:
	fail-fast: false
	matrix:
	python-version: [3.8, 3.9]
	os: [ubuntu-20.04, macos-13]

	runs-on: ${{ matrix.os }}
	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Setup Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies 1
	run: \|
	pip install --upgrade pip
	pip install --no-cache-dir torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cpu
	pip install .[tests]

	- name: Test with pytest (stable pytorch)
	working-directory: tests
	run: \|
	pytest bettertransformer -n auto -s -vvvvv --durations=0

	- name: Install dependencies 2
	run: \|
	pip install --no-cache-dir --upgrade --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cpu

	- name: Test with pytest (nightly pytorch)
	working-directory: tests
	run: \|
	pytest bettertransformer -n auto -s -vvvvv --durations=0

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