Squashed commit of the following: #25

	name: tests

	on: [push, pull_request]

	env:
	RUN: docker run --shm-size 1G --rm opendbc /bin/sh -c
	BUILD: \|
	docker pull $(grep -ioP '(?<=^from)\s+\S+' Dockerfile) \|\| true
	docker pull ghcr.io/commaai/opendbc:latest \|\| true
	docker build --cache-from ghcr.io/commaai/opendbc:latest -t opendbc -f Dockerfile .

	jobs:
	test:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	- name: Build Docker image
	run: eval "$BUILD"
	- name: Static analysis
	run: \|
	docker run opendbc bash -c "cd opendbc && git init && git add -A && pre-commit run --all"
	- name: Generator test
	run: \|
	docker run opendbc bash -c "cd opendbc/generator && ./test_generator.py"
	- name: Unit tests
	run: \|
	docker run opendbc bash -c "python -m unittest discover opendbc"
	- name: Push to dockerhub
	if: github.ref == 'refs/heads/master' && github.event_name != 'pull_request' && github.repository == 'commaai/opendbc'
	run: \|
	docker login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
	docker tag opendbc ghcr.io/commaai/opendbc:latest
	docker push ghcr.io/commaai/opendbc:latest

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