GHA: Linux: don't track all supported distro versions #1617

	name: Linux

	on:
	push:
	branches:
	- master
	- 'support/*'
	pull_request: {}

	concurrency:
	group: linux-${{ github.event_name == 'push' && github.sha \|\| github.ref }}
	cancel-in-progress: true

	jobs:
	linux:
	name: ${{ matrix.distro }}
	runs-on: ubuntu-latest

	strategy:
	fail-fast: false
	max-parallel: 2
	matrix:
	distro:
	- amazonlinux:2
	- amazonlinux:2023

	# Raspberry Pi OS is close enough to Debian to test just one of them.
	# Its architecture is different, though, and covered by the Docker job.
	- debian:11
	- debian:12

	- fedora:39
	- fedora:40
	- fedora:41

	# openSUSE Leap is close enough to SLES to test just one of them.
	# As openSUSE is much easier to deploy, we test it despite the fact that we don't necessarily
	# support individual versions of openSUSE as long as their SLES counterparts.
	# I.e., remove any opensuse/leap:* line below only if we stopped packaging both openSUSE and SLES!
	- opensuse/leap:15.3
	- opensuse/leap:15.4
	- opensuse/leap:15.5
	- opensuse/leap:15.6

	# We don't actually support Rocky Linux as such!
	# We just use that RHEL clone to test the original.
	- rockylinux:8
	- rockylinux:9

	- ubuntu:20.04
	- ubuntu:22.04
	- ubuntu:24.04
	- ubuntu:24.10

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

	- name: Restore/backup ccache
	uses: actions/cache@v3
	with:
	path: ccache
	key: ccache/${{ matrix.distro }}

	- name: Build
	run: >-
	docker run --rm -v "$(pwd):/icinga2" -e DISTRO=${{ matrix.distro }}
	${{ matrix.distro }} /icinga2/.github/workflows/linux.bash

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