Dependencies #53

	name: Dependencies

	on:
	workflow_call:
	outputs:
	cache_key:
	description: "GH Actions Cache key associated with the built dependencies"
	value: ${{ jobs.build_dependencies.outputs.cache_key }}
	schedule:
	# Rebuild dependencies cache from the "main" branch at the beginning of a new day,
	# so it is accessible from other branches' PRs
	- cron: "10 0 * * *"

	concurrency:
	group: global
	cancel-in-progress: false

	jobs:
	build_dependencies:
	name: Build broker image
	runs-on: ubuntu-latest
	outputs:
	cache_key: ${{ steps.get-cache-key.outputs.cache_key }}
	steps:
	- uses: actions/checkout@v4

	- name: Checkout BlazingMQ
	run: git clone https://github.com/bloomberg/blazingmq

	- name: Generate dependencies cache key
	id: get-cache-key
	run: \|
	echo "cache_key=deps-`date +%y-%m-%d`" >> $GITHUB_OUTPUT

	- name: Cache lookup
	uses: actions/cache/restore@v4
	id: cache-lookup
	with:
	path: blazingmq_image.tar.gz
	key: ${{ steps.get-cache-key.outputs.cache_key }}
	lookup-only: true

	# TODO: pull docker image from the registry once we support it
	- name: Build base BlazingMQ docker image
	if: steps.cache-lookup.outputs.cache-hit != 'true'
	working-directory: blazingmq
	run: docker compose -f docker/single-node/docker-compose.yaml build

	- name: Save built BlazingMQ docker image
	if: steps.cache-lookup.outputs.cache-hit != 'true'
	run: docker save bmqbrkr:latest \| gzip > blazingmq_image.tar.gz

	- name: Save cache
	if: steps.cache-lookup.outputs.cache-hit != 'true'
	uses: actions/cache/save@v4
	with:
	path: blazingmq_image.tar.gz
	key: ${{ steps.get-cache-key.outputs.cache_key }}

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