#!/usr/bin/env php
<?php
/**
*
* @package phpBB3
* @copyright (c) 2011 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/

function show_usage()
{
	$filename = basename(__FILE__);

	echo "$filename adds repositories of a github network as remotes to a local git repository.\n";
	echo "\n";

	echo "Usage: [php] $filename -s collaborators|organisation|contributors|network [OPTIONS]\n";
	echo "\n";

	echo "Scopes:\n";
	echo "  collaborators                 Repositories of people who have push access to the specified repository\n";
	echo "  contributors                  Repositories of people who have contributed to the specified repository\n";
	echo "  organisation                  Repositories of members of the organisation at github\n";
	echo "  network                       All repositories of the whole github network\n";
	echo "\n";

	echo "Options:\n";
	echo " -s scope                       See description above (mandatory)\n";
	echo " -u github_username             Overwrites the github username (optional)\n";
	echo " -r repository_name             Overwrites the repository name (optional)\n";
	echo " -m your_github_username        Sets up ssh:// instead of git:// for pushable repositories (optional)\n";
	echo " -d                             Outputs the commands instead of running them (optional)\n";
	echo " -h                             This help text\n";

	exit(1);
}

// Handle arguments
$opts = getopt('s:u:r:m:dh');

if (empty($opts) || isset($opts['h']))
{
	show_usage();
}

$scope			= get_arg($opts, 's', '');
$username		= get_arg($opts, 'u', 'phpbb');
$repository 	= get_arg($opts, 'r', 'phpbb3');
$developer		= get_arg($opts, 'm', '');
$dry_run		= !get_arg($opts, 'd', true);
run(null, $dry_run);
exit(work($scope, $username, $repository, $developer));

function work($scope, $username, $repository, $developer)
{
	// Get some basic data
	$network		= get_network($username, $repository);
	$collaborators	= get_collaborators($username, $repository);

	if ($network === false || $collaborators === false)
	{
		echo "Error: failed to retrieve network or collaborators\n";
		return 1;
	}

	switch ($scope)
	{
		case 'collaborators':
			$remotes = array_intersect_key($network, $collaborators);
		break;

		case 'organisation':
			$remotes = array_intersect_key($network, get_organisation_members($username));
		break;

		case 'contributors':
			$remotes = array_intersect_key($network, get_contributors($username, $repository));
		break;

		case 'network':
			$remotes = $network;
		break;

		default:
			show_usage();
	}

	if (file_exists('.git'))
	{
		add_remote($username, $repository, isset($collaborators[$developer]));
	}
	else
	{
		clone_repository($username, $repository, isset($collaborators[$developer]));
	}

	// Add private security repository for developers
	if ($username == 'phpbb' && $repository == 'phpbb3' && isset($collaborators[$developer]))
	{
		run("git remote add $username-security " . get_repository_url($username, "$repository-security", true));
	}

	// Skip blessed repository.
	unset($remotes[$username]);

	foreach ($remotes as $remote)
	{
		add_remote($remote['username'], $remote['repository'], $remote['username'] == $developer);
	}

	run('git remote update');
}

function clone_repository($username, $repository, $pushable = false)
{
	$url = get_repository_url($username, $repository, false);
	run("git clone $url ./ --origin $username");

	if ($pushable)
	{
		$ssh_url = get_repository_url($username, $repository, true);
		run("git remote set-url --push $username $ssh_url");
	}
}

function add_remote($username, $repository, $pushable = false)
{
	$url = get_repository_url($username, $repository, false);
	run("git remote add $username $url");

	if ($pushable)
	{
		$ssh_url = get_repository_url($username, $repository, true);
		run("git remote set-url --push $username $ssh_url");
	}
}

function get_repository_url($username, $repository, $ssh = false)
{
	$url_base = ($ssh) ? 'git@github.com:' : 'git://github.com/';

	return $url_base . $username . '/' . $repository . '.git';
}

function api_request($query)
{
	$contents = file_get_contents("http://github.com/api/v2/json/$query");
	if ($contents === false)
	{
		return false;
	}
	return json_decode($contents);
}

function get_contributors($username, $repository)
{
	$request = api_request("repos/show/$username/$repository/contributors");
	if ($request === false)
	{
		return false;
	}

	$usernames = array();
	foreach ($request->contributors as $contributor)
	{
		$usernames[$contributor->login] = $contributor->login;
	}

	return $usernames;
}

function get_organisation_members($username)
{
	$request = api_request("organizations/$username/public_members");
	if ($request === false)
	{
		return false;
	}

	$usernames = array();
	foreach ($request->users as $member)
	{
		$usernames[$member->login] = $member->login;
	}

	return $usernames;
}

function get_collaborators($username, $repository)
{
	$request = api_request("repos/show/$username/$repository/collaborators");
	if ($request === false)
	{
		return false;
	}

	$usernames = array();
	foreach ($request->collaborators as $collaborator)
	{
		$usernames[$collaborator] = $collaborator;
	}

	return $usernames;
}

function get_network($username, $repository)
{
	$request = api_request("repos/show/$username/$repository/network");
	if ($request === false)
	{
		return false;
	}

	$usernames = array();
	foreach ($request->network as $network)
	{
		$usernames[$network->owner] = array(
			'username'		=> $network->owner,
			'repository'	=> $network->name,
		);
	}

	return $usernames;
}

function get_arg($array, $index, $default)
{
	return isset($array[$index]) ? $array[$index] : $default;
}

function run($cmd, $dry = false)
{
	static $dry_run;

	if (is_null($cmd))
	{
		$dry_run = $dry;
	}
	else if (!empty($dry_run))
	{
		echo "$cmd\n";
	}
	else
	{
		passthru(escapeshellcmd($cmd));
	}
}
e/drakx/log/?h=drakx-installer-images-2.92&amp;id=bf9b18e40a897ed029d5fa65840a02332d8e485f'>root</a>/<a href='/software/drakx/log/perl-install?h=drakx-installer-images-2.92&amp;id=bf9b18e40a897ed029d5fa65840a02332d8e485f'>perl-install</a>/<a href='/software/drakx/log/perl-install/share?h=drakx-installer-images-2.92&amp;id=bf9b18e40a897ed029d5fa65840a02332d8e485f'>share</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th></th><th class='left'>Commit message (<a href='/software/drakx/log/perl-install/share?h=drakx-installer-images-2.92&amp;id=bf9b18e40a897ed029d5fa65840a02332d8e485f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Age</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=adacd16f063aa87662388e6810eed86ff659f4a0'>change a bit how strings are passed to advertising system</a></td><td>Guillaume Cottenceau</td><td><span title='2003-06-12 20:55:54 +0000'>2003-06-12</span></td><td>16</td><td><span class='deletions'>-1252</span>/<span class='insertions'>+1632</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=f849b68fce455b013d4493fc372e8da41147dd57'>cooker</a></td><td>Guillaume Cottenceau</td><td><span title='2003-06-06 15:10:14 +0000'>2003-06-06</span></td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+0</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=98d8aa6727de9bdba8ef650bbc669f241d06467b'>updated Estonien, Japanese, Albanian and Vietnamese po files</a></td><td>Pablo Saratxaga</td><td><span title='2003-06-03 14:30:57 +0000'>2003-06-03</span></td><td>3</td><td><span class='deletions'>-3301</span>/<span class='insertions'>+3539</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=98e86b68ead1420e25051733c2169553f5a73c9e'>Update</a></td><td>Arkadiusz Lipiec</td><td><span title='2003-06-02 17:55:36 +0000'>2003-06-02</span></td><td>1</td><td><span class='deletions'>-195</span>/<span class='insertions'>+308</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=8ecb343fbabb87cd4bdcc65e5d2ad52574ca0f55'>updated Spanish translations</a></td><td>Fabián Mandelbaum</td><td><span title='2003-06-02 14:42:15 +0000'>2003-06-02</span></td><td>1</td><td><span class='deletions'>-154</span>/<span class='insertions'>+271</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=3e71d95d16e0602d4ba0e22c6dc5054a66220172'>changed the name of the russian phonetic layout</a></td><td>Pablo Saratxaga</td><td><span title='2003-05-31 10:02:24 +0000'>2003-05-31</span></td><td>47</td><td><span class='deletions'>-6454</span>/<span class='insertions'>+11245</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=6c1748195382462f95fafbee578f8e8eb69d7309'>updated Vietnamese file</a></td><td>Pablo Saratxaga</td><td><span title='2003-05-30 18:31:40 +0000'>2003-05-30</span></td><td>2</td><td><span class='deletions'>-67</span>/<span class='insertions'>+68</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=039f6d5d590742c5ee4c2fae96fb37d01f8a9b17'>updated Albanian file</a></td><td>Pablo Saratxaga</td><td><span title='2003-05-28 15:32:12 +0000'>2003-05-28</span></td><td>1</td><td><span class='deletions'>-5</span>/<span class='insertions'>+46</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=e3da407f233805e159a7bfd42e1363738bc9687d'>updated pot file</a></td><td>Pablo Saratxaga</td><td><span title='2003-05-26 15:23:24 +0000'>2003-05-26</span></td><td>1</td><td><span class='deletions'>-3</span>/<span class='insertions'>+43</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=85e90a38fe5dbd0b88e7a8254c29e55714b34fa3'>updated pot file</a></td><td>Pablo Saratxaga</td><td><span title='2003-05-22 17:39:30 +0000'>2003-05-22</span></td><td>2</td><td><span class='deletions'>-75</span>/<span class='insertions'>+134</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=9daaa3f09953412921ea636ce409bd830afe8443'>updated pot file</a></td><td>Pablo Saratxaga</td><td><span title='2003-05-20 23:54:27 +0000'>2003-05-20</span></td><td>2</td><td><span class='deletions'>-98</span>/<span class='insertions'>+147</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=869ec05f3d954962ae1c66c27a018b979d0629bf'>updated German, Estonian and Finnish files</a></td><td>Pablo Saratxaga</td><td><span title='2003-05-20 10:43:15 +0000'>2003-05-20</span></td><td>3</td><td><span class='deletions'>-1420</span>/<span class='insertions'>+1964</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=1a375e61453fc7d7a32fbdc475f84a8b908a5847'>update french translation</a></td><td>Thierry Vignaud</td><td><span title='2003-05-20 09:37:27 +0000'>2003-05-20</span></td><td>1</td><td><span class='deletions'>-67</span>/<span class='insertions'>+54</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=120da3b0016efb83c568cbfe43b1735d8ec29a87'>updated Spanish translations</a></td><td>Fabián Mandelbaum</td><td><span title='2003-05-19 13:52:26 +0000'>2003-05-19</span></td><td>1</td><td><span class='deletions'>-221</span>/<span class='insertions'>+176</span></td></tr>
<tr><td class='commitgraph'>* </td><td><a href='/software/drakx/commit/perl-install/share?h=drakx-installer-images-2.92&amp;id=411e0e9d500d91cf111fb93209acd7d461ee2453'>updated pot file</a></td><td>Pablo Saratxaga</td><td><span title='2003-05-16 15:55:38 +0000'>2003-05-16</span>