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<?php
// explicitly give VERSION via ENV or ask git for current version
$version = getenv('VERSION');
if ($version === false) {
$version = ltrim(exec('git describe --always --dirty', $unused, $code), 'v');
if ($code !== 0) {
fwrite(STDERR, 'Error: Unable to get version info from git. Try passing VERSION via ENV' . PHP_EOL);
exit(1);
}
}
// use first argument as output file or use "leproxy-{version}.php"
$out = isset($argv[1]) ? $argv[1] : ('leproxy-' . $version . '.php');
system('composer install --no-dev --classmap-authoritative');
$classes = require __DIR__ . '/vendor/composer/autoload_classmap.php';
$includes = require __DIR__ . '/vendor/composer/autoload_files.php';
system('composer install');
echo 'Loading ' . count($classes) . ' classes to determine load order...';
// register autoloader which remembers load order
$ordered = array();
spl_autoload_register(function ($name) use ($classes, &$ordered) {
require $classes[$name];
$ordered[$name] = $classes[$name];
});
// use actual include file instead of include wrapper
foreach ($includes as $i => $path) {
$includes[$i] = str_replace('_include.php', '.php', $path);
require $path;
}
// load each class (and its superclasses once) into memory
foreach ($classes as $class => $path) {
class_exists($class, true);
}
echo ' DONE' . PHP_EOL;
// resulting list of all includes and ordered class list
$files = array_merge($includes, $ordered);
echo 'Concatenating ' . count($files) . ' files into ' . $out . '...';
system('sed -n "/\#\!/,/^$/p" leproxy.php | sed -e "s/version dev/version ' . $version . '/" > ' . escapeshellarg($out));
foreach ($files as $file) {
$file = substr($file, strlen(__DIR__) + 1);
system('(echo "# ' . $file . '"; grep -v "<?php" ' . escapeshellarg($file) . ') >> ' . escapeshellarg($out));
}
$file = 'leproxy.php';
system('(echo "# ' . $file . '"; egrep -v "^<\?php|^require " ' . escapeshellarg($file) . ') | sed -e "s/development/release/;/define(\'VERSION\'/c const VERSION=\"' . $version . '\";" >> ' . escapeshellarg($out));
chmod($out, 0755);
echo ' DONE (' . filesize($out) . ' bytes)' . PHP_EOL;
echo 'Optimizing resulting file...';
$small = '';
$all = token_get_all(file_get_contents($out));
// search next non-whitespace/non-comment token
$next = function ($i) use (&$all) {
for ($i = $i + 1; !isset($all[$i]) || is_array($all[$i]) && ($all[$i][0] === T_COMMENT || $all[$i][0] === T_DOC_COMMENT || $all[$i][0] === T_WHITESPACE); ++$i);
return $i;
};
// search previous non-whitespace/non-comment token
$prev = function ($i) use (&$all) {
for ($i = $i -1; $i >= 0 && (!isset($all[$i]) || (is_array($all[$i]) && ($all[$i][0] === T_COMMENT || $all[$i][0] === T_DOC_COMMENT || $all[$i][0] === T_WHITESPACE))); --$i);
return $i;
};
$first = true;
foreach ($all as $i => $token) {
if (is_array($token) && ($token[0] === T_COMMENT || $token[0] === T_DOC_COMMENT)) {
// remove all comments except first
if ($first === true) {
$first = false;
continue;
}
unset($all[$i]);
} elseif (is_array($token) && $token[0] === T_PUBLIC) {
// get next non-whitespace token after `public` visibility
$token = $all[$next($i)];
if (is_array($token) && $token[0] === T_VARIABLE) {
// use shorter variable notation `public $a` => `var $a`
$all[$i] = array(T_VAR, 'var');
} else {
// remove unneeded public identifier `public static function a()` => `static function a()`
unset($all[$i]);
}
} elseif (is_array($token) && $token[0] === T_LNUMBER) {
// Use shorter integer notation `0x0F` => `15` and `011` => `9`.
// Technically, hex codes may be shorter for very large ints, but adding
// another 2 leading chars is rarely worth it.
// Optimizing floats is not really worth it, as they have many special
// cases, such as e-notation and we would lose types for `0.0` => `0`.
$all[$i][1] = (string)intval($token[1], 0);
} elseif (is_array($token) && $token[0] === T_NEW) {
// remove unneeded parenthesis for constructors without args `new a();` => `new a;`
// jump over next token (class name), then next must be open parenthesis, followed by closing
$open = $next($next($i));
$close = $next($open);
if ($all[$open] === '(' && $all[$close] === ')') {
unset($all[$open], $all[$close]);
}
} elseif (is_array($token) && $token[0] === T_STRING) {
// replace certain functions with their shorter alias function name
// http://php.net/manual/en/aliases.php
static $replace = array(
'implode' => 'join',
'fwrite' => 'fputs',
'array_key_exists' => 'key_exists',
'current' => 'pos',
);
// check this has a replacement and "looks like" a function call
// this works on a number of assumptions, such as not being aliased/namespaced
if (isset($replace[$token[1]])) {
$p = $all[$prev($i)];
if ($all[$next($i)] === '(' && (!is_array($p) || !in_array($p[0], array(T_FUNCTION, T_OBJECT_OPERATOR, T_DOUBLE_COLON, T_NEW)))) {
$all[$i][1] = $replace[$all[$i][1]];
}
}
} elseif (is_array($token) && $token[0] === T_EXIT) {
// replace `exit` with shorter alias `die`
// it's a language construct, not a function (see above)
$all[$i][1] = 'die';
} elseif (is_array($token) && $token[0] === T_RETURN) {
// replace `return null;` with `return;`
$t = $next($i);
if (is_array($all[$t]) && $all[$t][0] === T_STRING && $all[$t][1] === 'null' && $all[$next($t)] === ';') {
unset($all[$t]);
}
}
}
$all = array_values($all);
foreach ($all as $i => $token) {
if (is_array($token) && $token[0] === T_WHITESPACE) {
if (strpos($token[1], "\n") !== false) {
$token = strpos("()[]<>=+-*/%|,.:?!'\"\n", substr($small, -1)) === false ? "\n" : '';
} else {
$last = substr($small, -1);
$next = isset($all[$i + 1]) ? substr(is_array($all[$i + 1]) ? $all[$i + 1][1] : $all[$i + 1], 0, 1) : ' ';
$token = (strpos('()[]{}<>;=+-*/%&|,.:?!@\'"' . "\r\n", $last) !== false || strpos('()[]{}<>;=+-*/%&|,.:?!@\'"' . '\\$', $next) !== false) ? '' : ' ';
}
}
$small .= isset($token[1]) ? $token[1] : $token;
}
file_put_contents($out, $small);
echo ' DONE (' . strlen($small) . ' bytes)' . PHP_EOL;