Periodic Merges (24h) #1548

	# This action periodically merges base branches into staging branches.
	# This is done to
	# * prevent conflicts or rather resolve them early
	# * make all potential breakage happen on the staging branch
	# * and make sure that all major rebuilds happen before the staging
	# branch get’s merged back into its base branch.

	name: "Periodic Merges (24h)"

	on:
	schedule:
	# * is a special character in YAML so you have to quote this string
	# Merge every 24 hours
	- cron: '0 0 * * *'
	workflow_dispatch:

	permissions: {}

	defaults:
	run:
	shell: bash

	jobs:
	periodic-merge:
	if: github.repository_owner == 'NixOS'
	strategy:
	# don't fail fast, so that all pairs are tried
	fail-fast: false
	# certain branches need to be merged in order, like master->staging-next->staging
	# and disabling parallelism ensures the order of the pairs below.
	max-parallel: 1
	matrix:
	pairs:
	- from: release-25.05
	into: staging-next-25.05
	- from: staging-next-25.05
	into: staging-25.05
	- name: merge-base(master,staging) → haskell-updates
	from: master staging
	into: haskell-updates
	uses: ./.github/workflows/periodic-merge.yml
	with:
	from: ${{ matrix.pairs.from }}
	into: ${{ matrix.pairs.into }}
	name: ${{ matrix.pairs.name \|\| format('{0} → {1}', matrix.pairs.from, matrix.pairs.into) }}
	secrets: inherit

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