OCI workflows: ignore commits that only change workflows/alpha-build.… #24

	name: Trigger an alpha release build
	on:
	workflow_dispatch:
	push:
	branches:
	- "main"
	paths:
	- "deps/**"
	- ".github/workflows/**"
	env:
	DEV_WORKFLOW_REPOSITORY: "rabbitmq/server-packages"
	jobs:
	trigger_alpha_build:
	runs-on: ubuntu-latest
	steps:
	- name: Compute prerelease identifier from commit SHA
	run: echo "PRERELEASE_IDENTIFIER=`echo ${{ github.sha }} \| cut -c1-8`" >> $GITHUB_ENV
	- name: Compute event date and time
	run: echo "PRERELEASE_TIMESTAMP=`date --rfc-3339=seconds`" >> $GITHUB_ENV
	- name: Compute event UNIX timestamp
	run: echo "PRERELEASE_UNIX_TIMESTAMP=`date +%s`" >> $GITHUB_ENV
	- name: Trigger an alpha build in ${{ env.DEV_WORKFLOW_REPOSITORY }}
	run: \|
	curl -L \
	-X POST \
	-H "Accept: application/vnd.github+json" \
	-H "Authorization: Bearer ${{ secrets.RABBITMQCI_BOT_TOKEN }}" \
	-H "X-GitHub-Api-Version: 2022-11-28" \
	https://api.github.com/repos/${{ env.DEV_WORKFLOW_REPOSITORY }}/dispatches \
	-d '{ "event_type": "new_4.1.x_alpha", "client_payload": {"release_repository": "${{ env.DEV_WORKFLOW_REPOSITORY }}", "release_description": "Built from https://github.com/rabbitmq/rabbitmq-server/commit/${{ github.sha }} at ${{ env.PRERELEASE_TIMESTAMP }}", "prerelease": true, "prerelease_kind": "alpha", "prerelease_identifier": "${{ env.PRERELEASE_IDENTIFIER }}", "release_title": "Alpha build at ${{ env.PRERELEASE_UNIX_TIMESTAMP }}, version: 4.1.0-alpha.${{ env.PRERELEASE_IDENTIFIER }}", "base_version": "4.1.0" }}'

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