1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
<?php declare(strict_types=1);
require __DIR__ . '/phpyLang.php';
$parserToDefines = [
'Php7' => ['PHP7' => true],
'Php8' => ['PHP8' => true],
];
$grammarFile = __DIR__ . '/php.y';
$skeletonFile = __DIR__ . '/parser.template';
$tmpGrammarFile = __DIR__ . '/tmp_parser.phpy';
$tmpResultFile = __DIR__ . '/tmp_parser.php';
$resultDir = __DIR__ . '/../lib/PhpParser/Parser';
$kmyacc = getenv('KMYACC');
if (!$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 ///
///////////////////
foreach ($parserToDefines as $name => $defines) {
echo "Building temporary $name grammar file.\n";
$grammarCode = file_get_contents($grammarFile);
$grammarCode = replaceIfBlocks($grammarCode, $defines);
$grammarCode = preprocessGrammar($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);
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;
}
function replaceIfBlocks(string $code, array $defines): string {
return preg_replace_callback('/\n#if\s+(\w+)\n(.*?)\n#endif/s', function ($matches) use ($defines) {
$value = $defines[$matches[1]] ?? false;
return $value ? $matches[2] : '';
}, $code);
}
|
