Git pull all, a script that forks mutliple 'git submodule pull' actions. Much faster than "--recurse-submodules".

git_pull_all.php

#!/usr/bin/php
<?php

$path = trim(`pwd`);
$submodulePath = $path . DIRECTORY_SEPARATOR . ".gitmodules";

$commands = array("cd {$path} && git pull");

if(is_file($submodulePath)) {
	$ini = parse_ini_file($submodulePath, true);

	if(count($ini) > 0) {
		foreach($ini as $module) {
			$pullPath = $path . DIRECTORY_SEPARATOR . $module["path"];
			$commands[] = "cd {$pullPath} && git pull";
		}		
	}
}

$pids = array();
foreach($commands as $cmd) {
	$pid = pcntl_fork();
	if($pid > 0) {
		$pids[] = $pid;
		continue;
	} else if($pid == 0) {
		run($cmd);
		exit;
	} else {
		exit("Unable to fork.");
	}
}

print "Forked " . count($pids) . " job" . ($pids != 1 ? 's' : '') . ". Waiting for completion:" . PHP_EOL;

foreach($pids as $pid) {
	pcntl_wait($pid);
}

function run($command) {
	ob_start();
	echo $command . PHP_EOL;
	$out = exec($command);
	echo $out . PHP_EOL . PHP_EOL;	
}