make it easier to test pull request images #193

	name: pr_build

	on:
	pull_request:
	paths:
	- '*'
	- '/*'
	- '!README.md'
	- '!COPYING.LGPL-3'
	- '!.gitattributes'
	- '!.gitignore'
	types:
	- opened
	- reopened
	- synchronize

	env:
	FS_IMAGE: ghcr.io/${{ github.repository }}
	FS_TAG: 0.0.0-pr${{ github.event.pull_request.number }}

	# TODO: Move this to repo config
	jobs:
	build:
	runs-on: ubuntu-22.04

	permissions:
	contents: read
	packages: write
	pull-requests: write

	strategy:
	matrix:
	platform:
	- linux/amd64
	# - linux/arm64

	steps:
	- name: Set up QEMU
	id: qemu
	uses: docker/setup-qemu-action@v1
	with:
	image: tonistiigi/binfmt:latest
	platforms: all
	if: matrix.platform == 'linux/arm64'

	- uses: actions/checkout@v3

	- name: extract git sha
	run: echo "GIT_SHA_SHORT=$(git rev-parse --short HEAD)" >> $GITHUB_ENV

	# Reads in .tools-versions and spits out env variables
	- uses: wistia/[email protected]

	- uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- uses: earthly/actions-setup@v1
	with: { version: "v${{ env.EARTHLY_TOOL_VERSION }}" }

	- run: \|
	earthly \
	--push \
	--platform ${{ matrix.platform }} \
	+docker-tag \
	--GIT_COMMIT=${{ env.GIT_SHA_SHORT }} \
	--GIT_TAG=${{ env.FS_TAG }} \
	--GOLANG_VERSION=${{ env.GOLANG_TOOL_VERSION }} \
	--CI_REGISTRY_IMAGE=${{ env.FS_IMAGE }}

	- uses: mshick/add-pr-comment@v2
	with:
	message: \|
	Temporary image available at `${{ env.FS_IMAGE }}:${{ env.FS_TAG }}`.

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