mirror of
https://github.com/nikic/PHP-Parser.git
synced 2025-01-16 22:58:15 +01:00
81 lines
2.2 KiB
PHP
81 lines
2.2 KiB
PHP
<?php declare(strict_types=1);
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require __DIR__ . '/phpyLang.php';
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$parserToDefines = [
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'Php7' => ['PHP7' => true],
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'Php8' => ['PHP8' => true],
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];
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$grammarFile = __DIR__ . '/php.y';
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$skeletonFile = __DIR__ . '/parser.template';
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$tmpGrammarFile = __DIR__ . '/tmp_parser.phpy';
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$tmpResultFile = __DIR__ . '/tmp_parser.php';
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$resultDir = __DIR__ . '/../lib/PhpParser/Parser';
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$kmyacc = getenv('KMYACC');
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if (!$kmyacc) {
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// Use phpyacc from dev dependencies by default.
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$kmyacc = __DIR__ . '/../vendor/bin/phpyacc';
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}
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$options = array_flip($argv);
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$optionDebug = isset($options['--debug']);
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$optionKeepTmpGrammar = isset($options['--keep-tmp-grammar']);
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///////////////////
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/// Main script ///
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///////////////////
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foreach ($parserToDefines as $name => $defines) {
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echo "Building temporary $name grammar file.\n";
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$grammarCode = file_get_contents($grammarFile);
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$grammarCode = replaceIfBlocks($grammarCode, $defines);
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$grammarCode = preprocessGrammar($grammarCode);
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file_put_contents($tmpGrammarFile, $grammarCode);
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$additionalArgs = $optionDebug ? '-t -v' : '';
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echo "Building $name parser.\n";
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$output = execCmd("$kmyacc $additionalArgs -m $skeletonFile -p $name $tmpGrammarFile");
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$resultCode = file_get_contents($tmpResultFile);
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$resultCode = removeTrailingWhitespace($resultCode);
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ensureDirExists($resultDir);
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file_put_contents("$resultDir/$name.php", $resultCode);
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unlink($tmpResultFile);
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if (!$optionKeepTmpGrammar) {
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unlink($tmpGrammarFile);
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}
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}
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////////////////////////////////
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/// Utility helper functions ///
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////////////////////////////////
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function ensureDirExists($dir) {
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if (!is_dir($dir)) {
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mkdir($dir, 0777, true);
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}
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}
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function execCmd($cmd) {
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$output = trim(shell_exec("$cmd 2>&1") ?? '');
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if ($output !== "") {
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echo "> " . $cmd . "\n";
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echo $output;
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}
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return $output;
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}
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function replaceIfBlocks(string $code, array $defines): string {
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return preg_replace_callback('/\n#if\s+(\w+)\n(.*?)\n#endif/s', function ($matches) use ($defines) {
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$value = $defines[$matches[1]] ?? false;
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return $value ? $matches[2] : '';
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}, $code);
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}
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