fix race condition (#91) #67

	name: Build Image Generator

	on:
	push:
	branches:
	- main

	env:
	CONTAINER_RELEASE_IMAGE: ghcr.io/mahryct3/magic-rust-discord-bot:${{ github.sha }}-image-generator
	CONTAINER_IMAGE_GENERATOR_IMAGE: ghcr.io/mahryct3/magic-rust-discord-bot:${{ github.ref_name }}-image-generator
	CONTAINER_OLD_IMAGE_GENERATOR_IMAGE: ghcr.io/mahryct3/magic-rust-discord-bot:image-generator-old

	jobs:
	build-docker:
	runs-on: ubuntu-latest
	permissions:
	packages: write
	contents: read

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

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

	- name: Log in to the Container registry
	run: echo "${{ secrets.GITHUB_TOKEN }}" \| docker login ghcr.io -u ${{ github.actor }} --password-stdin

	- name: Build and push Docker image
	run: \|
	if docker pull $CONTAINER_IMAGE_GENERATOR_IMAGE; then
	echo "Existing image found for $CONTAINER_IMAGE_GENERATOR_IMAGE"
	docker build --cache-from $CONTAINER_IMAGE_GENERATOR_IMAGE -f image_generator/Dockerfile -t $CONTAINER_RELEASE_IMAGE .
	docker push $CONTAINER_RELEASE_IMAGE
	docker tag $CONTAINER_IMAGE_GENERATOR_IMAGE $CONTAINER_OLD_IMAGE_GENERATOR_IMAGE
	docker push $CONTAINER_OLD_IMAGE_GENERATOR_IMAGE
	docker tag $CONTAINER_RELEASE_IMAGE $CONTAINER_IMAGE_GENERATOR_IMAGE
	docker push $CONTAINER_IMAGE_GENERATOR_IMAGE
	else
	echo "No existing image found for $CONTAINER_IMAGE_GENERATOR_IMAGE"
	docker build --cache-from $CONTAINER_IMAGE_GENERATOR_IMAGE -f image_generator/Dockerfile -t $CONTAINER_IMAGE_GENERATOR_IMAGE .
	docker push $CONTAINER_IMAGE_GENERATOR_IMAGE
	fi

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