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<?php

namespace RectorPrefix202308;

require __DIR__ . '/phpyLang.php';
$grammarFileToName = [__DIR__ . '/php5.y' => 'Php5', __DIR__ . '/php7.y' => 'Php7'];
$tokensFile = __DIR__ . '/tokens.y';
$tokensTemplate = __DIR__ . '/tokens.template';
$skeletonFile = __DIR__ . '/parser.template';
$tmpGrammarFile = __DIR__ . '/tmp_parser.phpy';
$tmpResultFile = __DIR__ . '/tmp_parser.php';
$resultDir = __DIR__ . '/../lib/PhpParser/Parser';
$tokensResultsFile = $resultDir . '/Tokens.php';
$kmyacc = \getenv('KMYACC');
if (!$kmyacc) {
    // Use phpyacc from dev dependencies by default.
    $kmyacc = __DIR__ . '/../vendor/bin/phpyacc';
}
$options = \array_flip($argv);
$optionDebug = isset($options['--debug']);
$optionKeepTmpGrammar = isset($options['--keep-tmp-grammar']);
///////////////////
/// Main script ///
///////////////////
$tokens = \file_get_contents($tokensFile);
foreach ($grammarFileToName as $grammarFile => $name) {
    echo "Building temporary {$name} grammar file.\n";
    $grammarCode = \file_get_contents($grammarFile);
    $grammarCode = \str_replace('%tokens', $tokens, $grammarCode);
    $grammarCode = preprocessGrammar($grammarCode);
    \file_put_contents($tmpGrammarFile, $grammarCode);
    $additionalArgs = $optionDebug ? '-t -v' : '';
    echo "Building {$name} parser.\n";
    $output = execCmd("{$kmyacc} {$additionalArgs} -m {$skeletonFile} -p {$name} {$tmpGrammarFile}");
    $resultCode = \file_get_contents($tmpResultFile);
    $resultCode = removeTrailingWhitespace($resultCode);
    ensureDirExists($resultDir);
    \file_put_contents("{$resultDir}/{$name}.php", $resultCode);
    \unlink($tmpResultFile);
    echo "Building token definition.\n";
    $output = execCmd("{$kmyacc} -m {$tokensTemplate} {$tmpGrammarFile}");
    \rename($tmpResultFile, $tokensResultsFile);
    if (!$optionKeepTmpGrammar) {
        \unlink($tmpGrammarFile);
    }
}
////////////////////////////////
/// Utility helper functions ///
////////////////////////////////
function ensureDirExists($dir)
{
    if (!\is_dir($dir)) {
        \mkdir($dir, 0777, \true);
    }
}
function execCmd($cmd)
{
    $output = \trim(\shell_exec("{$cmd} 2>&1"));
    if ($output !== "") {
        echo "> " . $cmd . "\n";
        echo $output;
    }
    return $output;
}