Post to Slack when `ci.yml` fails on `main` #167

	name: Continuous integration

	on:
	pull_request:
	paths-ignore:
	- '.cookiecutter/*'
	- 'docs/*'
	- 'requirements/*.in'
	- 'requirements/dev.txt'
	- '**/.gitignore'
	- '*.md'
	- 'LICENSE'
	workflow_call:

	jobs:
	backend:
	name: Backend
	runs-on: ubuntu-latest
	env:
	TOX_PARALLEL_NO_SPINNER: 1

	services:
	postgres:
	image: postgres:11.5-alpine
	ports:
	- 5434:5432
	steps:
	- name: Checkout git repo
	uses: actions/checkout@v3

	- name: Setup python
	uses: actions/setup-python@v4
	with:
	python-version-file: '.python-version'

	- name: Update pip
	run: python -m pip install --upgrade pip

	- name: Install tox
	run: python -m pip install 'tox<4'

	- name: Create test databases
	run: \|
	psql -U postgres -h localhost -p 5434 -c 'CREATE DATABASE checkmate_test'
	psql -U postgres -h localhost -p 5434 -c 'CREATE DATABASE checkmate_functests'

	- name: Cache the .tox dir
	uses: actions/cache@v3
	with:
	path: .tox
	key: ${{ runner.os }}-tox-${{ secrets.CACHE_VERSION }}-${{ hashFiles('tox.ini', 'requirements*', 'setup.py', 'setup.cfg') }}
	restore-keys: \|
	${{ runner.os }}-tox-${{ secrets.CACHE_VERSION }}-

	- name: Run tox
	run: tox --parallel auto -e lint,checkformatting,tests,coverage,functests

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