Clarify commit message guidelines and improve error messages #62

	# Copyright (c) 2024, Zededa, Inc.
	# SPDX-License-Identifier: Apache-2.0
	---
	name: Lint Commit Messages

	on: # yamllint disable-line rule:truthy
	push:
	branches:
	- "master"
	- "[0-9]+.[0-9]+"
	- "[0-9]+.[0-9]+-stable"
	pull_request:
	branches:
	- "master"
	- "[0-9]+.[0-9]+"
	- "[0-9]+.[0-9]+-stable"

	jobs:
	commitlint:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	ref: ${{ github.base_ref }}
	fetch-depth: 0

	- name: Fetch the PR's head ref
	run: \|
	git fetch origin ${{ github.event.pull_request.head.sha }}:${{ github.event.pull_request.head.ref }}
	git checkout ${{ github.event.pull_request.head.ref }}

	- name: Create virtual environment
	run: \|
	cd tools/check-commit-messages
	python3 -m venv .venv
	source .venv/bin/activate
	pip install -r requirements.txt

	- name: Lint commit messages
	run: \|
	cd tools/check-commit-messages
	source .venv/bin/activate
	python check_commit_messages.py ${{ github.event.pull_request.base.sha }}

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