Update new_project_from_json.R #81

	name: pre-build-docker

	# Build docker image for a PR (pre-build) containing a new job so that it can be previewed and tested.
	# Current jobs should not need this because they already have a tailored build workflow in `main`.

	on:

	pull_request:
	branches:
	- '**'

	env:
	REGISTRY: ghcr.io
	# all pr-builds are called pre-build
	IMAGE: ghcr.io/${{ github.repository }}-pre-build

	jobs:
	build:
	if: "contains(github.event.head_commit.message, '[pre-build]')"
	runs-on: ubuntu-latest
	env:
	environment: "review"
	permissions:
	contents: read
	packages: write

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3
	with:
	ref: ${{ github.event.pull_request.head.ref }}
	fetch-depth: 0

	- name: Log into registry ${{ env.REGISTRY }}
	uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Set env
	run: \|
	DIFF=$( git diff --name-only HEAD~1 \| head -n 1 )
	echo "CONTEXT=$(dirname $DIFF)" >> $GITHUB_ENV

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2

	# Build and push Docker image with Buildx (don't push on PR)
	# https://github.com/docker/build-push-action
	- name: Build and push Docker image
	uses: docker/build-push-action@v3
	with:
	context: ./${{ env.CONTEXT }}
	tags: ${{ env.IMAGE }}:latest
	push: true
	platforms: linux/amd64

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