Merge pull request #1404 from elgohr-update/master #184

	name: "Docker"
	on:
	push:
	branches:
	- master
	paths:
	- '.dockerignore'
	- '.github/workflows/docker.yml'
	- 'Dockerfile'
	- 'LICENSE'
	- 'ghc-parser/**'
	- 'html/**'
	- 'ihaskell-display/**'
	- 'ihaskell.cabal'
	- 'ipython-kernel/**'
	- 'jupyterlab-ihaskell/**'
	- 'main/**'
	- 'src/**'
	- 'stack.yaml'
	pull_request:
	paths:
	- '.dockerignore'
	- '.github/workflows/docker.yml'
	- 'Dockerfile'
	- 'LICENSE'
	- 'ghc-parser/**'
	- 'html/**'
	- 'ihaskell-display/**'
	- 'ihaskell.cabal'
	- 'ipython-kernel/**'
	- 'jupyterlab-ihaskell/**'
	- 'main/**'
	- 'src/**'
	- 'stack.yaml'

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Install Stack
	run: \|
	export PATH=$HOME/.local/bin:$PATH
	mkdir -p ~/.local/bin
	curl -L https://get.haskellstack.org/stable/linux-x86_64.tar.gz \| tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
	- name: Check Dockerfile GHC version matches
	run: \|
	set -e
	STACK_GHC_VERSION=$(stack exec -- ghc --version \| awk '{ print $NF }')
	DOCKER_GHC_VERSION=$(sed -n 's/ARG GHC_VERSION=$.*$/\1/p' Dockerfile)
	if [[ ${STACK_GHC_VERSION} != ${DOCKER_GHC_VERSION} ]]; then
	echo 'GHC_VERSION in Dockerfile does not match stack resolver'
	echo "GHC_VERSION should be ${STACK_GHC_VERSION}"
	exit 1
	fi
	- uses: elgohr/Publish-Docker-Github-Action@v5
	with:
	name: gibiansky/ihaskell
	username: ${{ secrets.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_PASSWORD }}
	snapshot: true
	no_push: ${{ github.event_name == 'pull_request' }}

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