fix: signature check breaks qubes-builder update #145

	# SPDX-FileCopyrightText: 2023 - 2024 Benjamin Grande M. S. <ben.grande.b@gmail.com>
	#
	# SPDX-License-Identifier: GPL-3.0-or-later

	---
	name: Lint

	# yamllint disable-line rule:truthy
	on:
	# yamllint disable-line rule:empty-values
	push:
	branches:
	- main
	pull_request:
	branches:
	- main
	types:
	- opened
	- reopened
	- synchronize

	concurrency:
	group: ci-${{ github.ref }}-1
	cancel-in-progress: true

	jobs:
	lint:
	strategy:
	fail-fast: false
	runs-on: ubuntu-latest
	steps:
	- name: Update package list
	run: sudo apt-get -y update
	- name: Install OS packages
	# yamllint disable-line rule:line-length
	run: sudo apt-get install -y python3-dev python3-pip shellcheck reuse
	# gitlint is available on Debian but Ubuntu has an older version.
	- name: Install pip packages
	run: pip3 install salt-lint gitlint
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: actions/setup-python@v5
	- uses: pre-commit/action@v3.0.1

	- name: Lint commits
	# yamllint disable-line rule:line-length
	run: \|
	if test "${{ github.event_name}}" = "pull_request"
	then
	base="${{ github.event.pull_request.base.sha }}"
	head="${{ github.event.pull_request.head.sha }}"
	else
	base="${{ github.event.before }}"
	head="${{ github.event.after }}"
	fi
	if test "${base}" = "${head}" \|\| test -z "${base}"
	then
	gitlint --debug --commit "${head}"
	else
	gitlint --debug --commits "${base}..${head}"
	fi

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