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#!/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|forks [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 " forks 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

$forks = get_forks($username, $repository);

$collaborators = get_collaborators($username, $repository);

if ($forks === false || $collaborators === false)

{

echo "Error: failed to retrieve forks or collaborators\n";

return 1;

}

switch ($scope)

{

case 'collaborators':

$remotes = array_intersect_key($forks, $collaborators);

break;

case 'organisation':

$remotes = array_intersect_key($forks, get_organisation_members($username));

break;

case 'contributors':

$remotes = array_intersect_key($forks, get_contributors($username, $repository));

break;

case 'forks':

$remotes = $forks;

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)

{

return api_url_request("https://api.github.com/$query?per_page=100");

}

function api_url_request($url)

{

$contents = file_get_contents($url, false, stream_context_create(array(

'http' => array(

'header' => "User-Agent: phpBB/1.0\r\n",

),

)));

$sub_request_result = array();

// Check headers for pagination links

if (!empty($http_response_header))

{

foreach ($http_response_header as $header_element)

{

// Find Link Header which gives us a link to the next page

if (strpos($header_element, 'Link: ') === 0)

{

list($head, $header_content) = explode(': ', $header_element);

foreach (explode(', ', $header_content) as $links)

{

list($url, $rel) = explode('; ', $links);

if ($rel == 'rel="next"')

{

// Found a next link, follow it and merge the results

$sub_request_result = api_url_request(substr($url, 1, -1));

}

}

}

}

}

if ($contents === false)

{

return false;

}

$contents = json_decode($contents);

if (isset($contents->message) && strpos($contents->message, 'API Rate Limit') === 0)

{

throw new RuntimeException('Reached github API Rate Limit. Please try again later' . "\n", 4);

}

return ($sub_request_result) ? array_merge($sub_request_result, $contents) : $contents;

}

function get_contributors($username, $repository)

{

$request = api_request("repos/$username/$repository/stats/contributors");

if ($request === false)

{

return false;

}

$usernames = array();

foreach ($request as $contribution)

{

$usernames[$contribution->author->login] = $contribution->author->login;

}

return $usernames;

}

function get_organisation_members($username)

{

$request = api_request("orgs/$username/public_members");

if ($request === false)

{

return false;

}

$usernames = array();

foreach ($request as $member)

{

$usernames[$member->login] = $member->login;

}

return $usernames;

}

function get_collaborators($username, $repository)

{

$request = api_request("repos/$username/$repository/collaborators");

if ($request === false)

{

return false;

}

$usernames = array();

foreach ($request as $collaborator)

{

$usernames[$collaborator->login] = $collaborator->login;

}

return $usernames;

}

function get_forks($username, $repository)

{

$request = api_request("repos/$username/$repository/forks");

if ($request === false)

{

return false;

}

$usernames = array();

foreach ($request as $fork)

{

$usernames[$fork->owner->login] = array(

'username' => $fork->owner->login,

'repository' => $fork->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));

}

}