Bump actions/checkout from 3 to 4 #22

	name: create conda environments

	on:
	pull_request:
	paths:
	- '.github/workflows/create-conda-envs.yml'
	- '.github/actions/create-conda-envs/*'
	- 'src/reference/environments/env/*.ya?ml'
	workflow_dispatch:
	inputs:
	cylc_flow_version:
	description: 'Version to install.'
	required: true

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	test_conda_install:
	runs-on: ubuntu-latest
	timeout-minutes: 30
	strategy:
	matrix:
	python: [3.7, 3.8, 3.9]
	steps:
	- name: checkout cylc-doc
	uses: actions/checkout@v4

	- name: configure python
	uses: actions/setup-python@v4
	with:
	python-version: '3.9'

	- name: install setuptools
	run: \|
	# pick up deps for version processing
	pip install 'setuptools>=50'

	- name: checkout cylc-flow init file
	run: \|
	# needed to extract the cylc-flow version
	LIB_PATH='src/lib/cylc/flow'
	mkdir -p "$LIB_PATH"
	curl \
	https://raw.githubusercontent.com/cylc/cylc-flow/master/cylc/flow/__init__.py \
	> "$LIB_PATH/__init__.py"

	- name: create conda envs
	uses: ./.github/actions/create-conda-envs
	with:
	python_version: ${{ matrix.python }}
	cylc_flow_version: ${{ github.event.inputs.cylc_flow_version }}

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