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Optimize classmap generation by avoiding the use of token_get_all() 

First of all this seems way faster than iterating over all tokens, but
especially it reduces memory usage drastically for very large files
pull/1311/head
Jordi Boggiano 2012-11-10 17:29:45 +01:00
parent 5480f7ba26
commit 8e9678a5ba
1 changed files with 24 additions and 47 deletions
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57
src/Composer/Autoload/ClassMapGenerator.php
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@ -92,59 +92,36 @@ class ClassMapGenerator
*/
private static function findClasses($path)
{
$contents = file_get_contents($path);
$contents = php_strip_whitespace($path);
try {
if (!preg_match('{\b(?:class|interface|trait)\b}i', $contents)) {
return array();
}
$tokens = token_get_all($contents);
} catch (\Exception $e) {
throw new \RuntimeException('Could not scan for classes inside '.$path.": \n".$e->getMessage(), 0, $e);
}
$T_TRAIT = version_compare(PHP_VERSION, '5.4', '<') ? -1 : T_TRAIT;
// strip heredocs/nowdocs
$contents = preg_replace('{<<<\'?(\w+)\'?(?:\r\n|\n|\r)(?:.*?)(?:\r\n|\n|\r)\\1(?=\r\n|\n|\r|;)}s', 'null', $contents);
// strip strings
$contents = preg_replace('{"[^"\\\\]*(\\\\.[^"\\\\]*)*"|\'[^\'\\\\]*(\\\\.[^\'\\\\]*)*\'}', 'null', $contents);
preg_match_all('{(?:\b(?<![\$:>])(?<type>class|interface|trait)\s+(?<name>\S+)|\b(?<![\$:>])(?<ns>namespace)\s+(?<nsname>[^\s;{}\\\\]+(?:\s*\\\\\s*[^\s;{}\\\\]+)*))}i', $contents, $matches);
$classes = array();
$namespace = '';
for ($i = 0, $max = count($tokens); $i < $max; $i++) {
$token = $tokens[$i];
if (is_string($token)) {
continue;
}
for ($i = 0, $len = count($matches['type']); $i < $len; $i++) {
$name = $matches['name'][$i];
$class = '';
switch ($token[0]) {
case T_NAMESPACE:
$namespace = '';
// If there is a namespace, extract it
while (($t = $tokens[++$i]) && is_array($t)) {
if (in_array($t[0], array(T_STRING, T_NS_SEPARATOR))) {
$namespace .= $t[1];
}
}
$namespace .= '\\';
break;
case T_CLASS:
case T_INTERFACE:
case $T_TRAIT:
// Find the classname
while (($t = $tokens[++$i]) && is_array($t)) {
if (T_STRING === $t[0]) {
$class .= $t[1];
} elseif ($class !== '' && T_WHITESPACE == $t[0]) {
break;
}
}
$classes[] = ltrim($namespace . $class, '\\');
break;
default:
break;
if (!empty($matches['ns'][$i])) {
$namespace = str_replace(array(' ', "\t", "\r", "\n"), '', $matches['nsname'][$i]) . '\\';
} else {
$classes[] = ltrim($namespace . $matches['name'][$i], '\\');
}
}
return $classes;
} catch (\Exception $e) {
throw new \RuntimeException('Could not scan for classes inside '.$path.": \n".$e->getMessage(), 0, $e);
}
}
}