Migrate CI from Travis to GitHub Actions #4

	name: CI

	on:
	push:
	branches:
	- master
	pull_request:

	jobs:
	test:
	name: PHP ${{ matrix.php }}${{ matrix.prefer-lowest == '--prefer-lowest' && ' (lowest)' \|\| '' }}
	runs-on: ubuntu-latest

	strategy:
	fail-fast: false
	matrix:
	php: ['7.4']
	prefer-lowest: ['', '--prefer-lowest']

	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Setup PHP
	uses: shivammathur/setup-php@v2
	with:
	php-version: ${{ matrix.php }}
	coverage: xdebug
	tools: composer:v2

	- name: Get Composer cache directory
	id: composer-cache
	run: echo "dir=$(composer config cache-files-dir)" >> "$GITHUB_OUTPUT"

	- name: Cache Composer packages
	uses: actions/cache@v4
	with:
	path: ${{ steps.composer-cache.outputs.dir }}
	key: composer-${{ matrix.php }}-${{ matrix.prefer-lowest }}-${{ hashFiles('composer.json') }}
	restore-keys: \|
	composer-${{ matrix.php }}-

	- name: Pin Composer platform to the runtime PHP version
	run: composer config platform.php "$(php -r 'echo PHP_VERSION;')"

	- name: Install dependencies
	run: composer update --no-interaction --prefer-dist ${{ matrix.prefer-lowest }}

	- name: Lint (phpcs)
	run: vendor/bin/phpcs -p --warning-severity=0 src/ tests/

	- name: Unit tests
	run: vendor/bin/phpunit --coverage-clover=./tests/report/coverage.clover

	- name: Upload coverage to Scrutinizer
	# Upload once, from a single representative job (matches the old single Travis upload).
	if: ${{ matrix.prefer-lowest == '' }}
	continue-on-error: true
	run: \|
	wget https://scrutinizer-ci.com/ocular.phar
	php ocular.phar code-coverage:upload --format=php-clover ./tests/report/coverage.clover

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