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<?php declare(strict_types=1);
/*
* This file is part of phpunit/php-code-coverage.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\CodeCoverage\StaticAnalysis;
use function assert;
use function crc32;
use function file_get_contents;
use function file_put_contents;
use function is_file;
use function serialize;
use GlobIterator;
use SebastianBergmann\CodeCoverage\Util\Filesystem;
use SplFileInfo;
/**
* @internal This class is not covered by the backward compatibility promise for phpunit/php-code-coverage
*/
final class CachingFileAnalyser implements FileAnalyser
{
/**
* @var ?string
*/
private static $cacheVersion;
/**
* @var FileAnalyser
*/
private $analyser;
/**
* @var array
*/
private $cache = [];
/**
* @var string
*/
private $directory;
public function __construct(string $directory, FileAnalyser $analyser)
{
Filesystem::createDirectory($directory);
$this->analyser = $analyser;
$this->directory = $directory;
if (self::$cacheVersion === null) {
$this->calculateCacheVersion();
}
}
public function classesIn(string $filename): array
{
if (!isset($this->cache[$filename])) {
$this->process($filename);
}
return $this->cache[$filename]['classesIn'];
}
public function traitsIn(string $filename): array
{
if (!isset($this->cache[$filename])) {
$this->process($filename);
}
return $this->cache[$filename]['traitsIn'];
}
public function functionsIn(string $filename): array
{
if (!isset($this->cache[$filename])) {
$this->process($filename);
}
return $this->cache[$filename]['functionsIn'];
}
/**
* @psalm-return array{linesOfCode: int, commentLinesOfCode: int, nonCommentLinesOfCode: int}
*/
public function linesOfCodeFor(string $filename): array
{
if (!isset($this->cache[$filename])) {
$this->process($filename);
}
return $this->cache[$filename]['linesOfCodeFor'];
}
public function executableLinesIn(string $filename): array
{
if (!isset($this->cache[$filename])) {
$this->process($filename);
}
return $this->cache[$filename]['executableLinesIn'];
}
public function ignoredLinesFor(string $filename): array
{
if (!isset($this->cache[$filename])) {
$this->process($filename);
}
return $this->cache[$filename]['ignoredLinesFor'];
}
public function process(string $filename): void
{
$cache = $this->read($filename);
if ($cache !== false) {
$this->cache[$filename] = $cache;
return;
}
$this->cache[$filename] = [
'classesIn' => $this->analyser->classesIn($filename),
'traitsIn' => $this->analyser->traitsIn($filename),
'functionsIn' => $this->analyser->functionsIn($filename),
'linesOfCodeFor' => $this->analyser->linesOfCodeFor($filename),
'ignoredLinesFor' => $this->analyser->ignoredLinesFor($filename),
'executableLinesIn' => $this->analyser->executableLinesIn($filename),
];
$this->write($filename, $this->cache[$filename]);
}
/**
* @return mixed
*/
private function read(string $filename)
{
$cacheFile = $this->cacheFile($filename);
if (!is_file($cacheFile)) {
return false;
}
return unserialize(
file_get_contents($cacheFile),
['allowed_classes' => false]
);
}
/**
* @param mixed $data
*/
private function write(string $filename, $data): void
{
file_put_contents(
$this->cacheFile($filename),
serialize($data)
);
}
private function cacheFile(string $filename): string
{
return $this->directory . DIRECTORY_SEPARATOR . hash('sha256', $filename . crc32(file_get_contents($filename)) . self::$cacheVersion);
}
private function calculateCacheVersion(): void
{
$buffer = '';
foreach (new GlobIterator(__DIR__ . '/*.php') as $file) {
assert($file instanceof SplFileInfo);
$buffer .= file_get_contents($file->getPathname());
}
self::$cacheVersion = (string) crc32($buffer);
}
}
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