Bump actions/download-artifact from 1 to 4.1.7 in /.github/workflows #1

	# Only test building images
	name: PullRequest

	on:
	pull_request:
	branches:
	- master

	env:
	DOCKER_ORG: pangeo
	GITHUB_SHA: ${{ github.sha }}
	GITHUB_REF: ${{ github.ref }}

	jobs:
	base-image:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout Repository
	uses: actions/checkout@v2

	- name: Build Base Image
	run: \|
	cd base-image
	docker build -t ${DOCKER_ORG}/base-image:PR .

	- name: Save Docker Image
	run: \|
	docker save ${DOCKER_ORG}/base-image:PR \| gzip > base-image.tar.gz

	- name: Upload Base Image
	uses: actions/upload-artifact@v1
	with:
	name: base-image
	path: base-image.tar.gz

	matrix-build:
	needs: base-image
	strategy:
	fail-fast: false
	matrix:
	IMAGE: [base-notebook, pangeo-notebook, ml-notebook]
	name: ${{ matrix.IMAGE }}
	runs-on: ubuntu-latest
	steps:
	- name: Checkout Repository
	uses: actions/checkout@v2

	- name: Download Base Docker Image
	uses: actions/[email protected]
	with:
	name: base-image
	path: ./artifact

	- name: Load Docker Image
	run: \|
	docker load < ./artifact/base-image.tar.gz
	docker images
	# Create temporary Dockerfile
	echo "FROM ${DOCKER_ORG}/base-image:PR" > Dockerfile

	- name: Build Image
	run: \|
	cd ${{ matrix.IMAGE }}
	docker build -t ${DOCKER_ORG}/${{ matrix.IMAGE }}:PR -f ../Dockerfile .

	- name: Export Full Conda Environment
	run: \|
	docker run ${DOCKER_ORG}/${{ matrix.IMAGE }}:PR conda list --export

	- name: Test Image
	run: \|
	docker run -u 1000 -w /srv/test -v $PWD:/srv/test ${DOCKER_ORG}/${{ matrix.IMAGE }}:PR ./run_tests.sh ${{ matrix.IMAGE }}

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