CI: cancel older concurrent PR runs #396

	# Copyright 2021, Proofcraft Pty Ltd
	#
	# SPDX-License-Identifier: BSD-2-Clause

	# sel4test simulation runs
	#
	# See sel4test-sim/builds.yml in the repo seL4/ci-actions for configs.

	name: seL4Test-Sim

	on:
	push:
	branches: [master]
	pull_request:

	# To reduce the load we cancel any older runs of this workflow for the current
	# PR. Such runs exist, if there were new pushes to the PR's branch without
	# waiting for the workflow to finish. As a side effect, pushing new commits now
	# becomes a convenient way to cancel all the older runs, e.g. if they are stuck
	# and would only be stopped by the timeout eventually.
	# For deployment to the master branch, the workflow will run on each push, no
	# skipping or cancellation will practically happen.
	concurrency:
	group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && format('pr-{0}', github.event.number) \|\| format('run-{0}', github.run_id) }}
	cancel-in-progress: ${{ github.event_name == 'pull_request' }}

	jobs:
	simulation:
	name: Simulation
	runs-on: ubuntu-latest
	strategy:
	matrix:
	march: [armv7a, armv8a, nehalem, rv32imac, rv64imac]
	compiler: [gcc, clang]
	steps:
	- uses: seL4/ci-actions/sel4test-sim@master
	with:
	march: ${{ matrix.march }}
	compiler: ${{ matrix.compiler }}

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