Small PHAR extract script

phar-extract

#!/usr/bin/env php
<?php

error_reporting(E_ALL | E_STRICT);
$opts = getOptions();


# Help
if (array_key_exists('h', $opts)) {
	echo "PHAR content extract by Milo (https://github.com/milo)\n";
	echo "\n";
	echo "Usage: " . basename(__FILE__) . " -s source\n";
	echo "    -s source     path to source PHAR file\n";
	echo "\n";
	echo "  Options:\n";
	echo "    -l            list content only\n";
	echo "    -L            list content only, full filesystem path\n";
	echo "\n";
	echo "    -b [file]     extract boot loader (stub) too (default: PHAR name)\n";
	echo "    -B            show boot loader and exit\n";
	echo "\n";
	echo "    -d directory  extract here (default: PHAR name)\n";
	echo "\n";
	echo "    -h            show this help and exit\n";
	echo "\n";
	exit(2);
}


# Source file check
if (!isset($opts['s'])) {
	echo "Missing -s source PHAR file. Use -h for help.\n";
	exit(2);
}
$srcFile = $opts['s'];
if (!is_file($srcFile)) {
	echo "Source file '$srcFile' is not a file. Use -h for help.\n";
	exit(1);
}


# PHAR open
try {
	$phar = new Phar($srcFile);
} catch (Exception $e) {
	echo "Cannot open PHAR file '$srcFile'. Is really in a PHAR format?\n";
	echo "Original (maybe confusing) error message:\n\t{$e->getMessage()}\n";
	exit(1);
}


# List only
if (($long = array_key_exists('L', $opts)) || array_key_exists('l', $opts)) {
	$trim = strlen('phar://' . realpath($srcFile) . DIRECTORY_SEPARATOR);

	foreach (new RecursiveIteratorIterator($phar) as $path => $foo) {
		echo ($long ? $path : substr($path, $trim)) . "\n";
	}
	exit(0);
}


# Boot loader
if (($show = array_key_exists('B', $opts)) || array_key_exists('b', $opts)) {
	$stub = $phar->getStub();

	if ($show) {
		echo $stub;
		exit(0);
	}

	$dstStub = pathinfo($srcFile, PATHINFO_FILENAME) . '.stub.php';
	if (is_string($opts['b'])) {
		$dstStub = $opts['b'];
	}
}


# Extract
$dstDir = isset($opts['d'])
	? $opts['d']
	: pathinfo($srcFile, PATHINFO_FILENAME);

if (file_exists($dstDir)) {
	echo "Destination '$dstDir' already exists. Use -h for help with other options.\n";
	exit(1);
}

if (isset($dstStub)) {
	if (file_exists($dstStub)) {
		echo "Destination for boot loader (stub) '$dstStub' already exists. Use -h for help.\n";
		exit(1);
	}

	if (file_put_contents($dstStub, $stub) === FALSE) {
		echo "Cannot save boot loader (stub) '$dstStub'.\n";
		exit(1);
	}

	echo "Boot loader (stub) saved to '$dstStub'.\n";
}

if (!mkdir($dstDir, 0700, TRUE)) {
	echo "Cannot create destination directory '$dstDir'.";
	exit(1);
}

$phar->extractTo($dstDir);
echo "Extract to '$dstDir' done.\n";

exit(0);



/** @return array */
function getOptions() {
	$args = isset($_SERVER['argv']) ? $_SERVER['argv'] : array();
	$argc = count($args);
	$opts = array();

	$isOpt = function($s, & $o) {
		if (preg_match('#^-([a-z])$#i', $s, $m)) {
			$o = $m[1];
			return TRUE;
		}
		return FALSE;
	};

	for ($i = 1; $i < $argc; $i++) {
		$curr = $args[$i];
		$next = & $args[$i+1];

		if ($isOpt($curr, $opt)) {
			if ($isOpt($next, $foo)) {
				$opts[$opt] = NULL;
			} else {
				$opts[$opt] = $next;
				$i++;
			}
		} else {
			$opts[] = $curr;
		}
	}

	return $opts;
}