Create CI system for ChAI #2

	name: build-CI-container

	env:
	REGISTRY: ghcr.io
	# NOTE: IMAGE_NAME must be lowercase
	IMAGE_NAME: chai-github-ci
	# NOTE: if this filename changes, also update in the on.paths section below
	DOCKERFILE: .github/docker/Dockerfile

	on:
	push:
	branches: [ main ]
	# This limits the action so it only builds when this file changes
	paths:
	# unfortunately we can't use ${{env.DOCKERFILE}} here
	# see https://docs.github.com/en/actions/learn-github-actions/contexts#context-availability
	- .github/docker/Dockerfile
	# also trigger on changes to this workflow file itself
	- .github/workflows/build-CI-container.yml
	pull_request:
	paths:
	# same as for pushes above
	- .github/docker/Dockerfile
	- .github/workflows/build-CI-container.yml
	# Adds a "manual run" option in the GH UI
	workflow_dispatch:


	jobs:
	build:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write
	steps:
	- name: Checkout Code
	uses: actions/checkout@v4
	- name: Login to GitHub Container Registry
	uses: docker/[email protected]
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: Build Docker Image
	uses: docker/[email protected]
	with:
	file: ${{ env.DOCKERFILE }}
	# example: ghcr.io/chapel-lang/chapel-github-ci:latest
	tags: ${{ env.REGISTRY }}/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}:latest
	- name: Push Docker Image if on main
	uses: docker/[email protected]
	with:
	file: ${{ env.DOCKERFILE }}
	push: true
	tags: ${{ env.REGISTRY }}/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}:latest

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