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<?php
// based on https://ocramius.github.io/blog/automated-code-coverage-check-for-github-pull-requests-with-travis/
$inputFile  = __DIR__ . '/../build/logs/clover.xml';
$percentage = min(100, max(0, (int) $argv[1]));

if (!file_exists($inputFile)) {
    throw new InvalidArgumentException('Invalid input file provided');
}

if (!$percentage) {
    throw new InvalidArgumentException('An integer checked percentage must be given as parameter');
}

$xml             = new SimpleXMLElement(file_get_contents($inputFile));
$metrics         = $xml->xpath('//metrics');
$totalElements   = 0;
$checkedElements = 0;

foreach ($metrics as $metric) {
    $totalElements   += (int) $metric['elements'];
    $checkedElements += (int) $metric['coveredelements'];
}

$coverage = ($checkedElements / $totalElements) * 100;

if ($coverage < $percentage) {
    echo 'Code coverage is ' . $coverage . '%, which is below the accepted ' . $percentage . '%' . PHP_EOL;
    exit(1);
}

echo 'Code coverage is ' . $coverage . '% - OK!' . PHP_EOL;