Download git contributor avatars from GitHub and Gravatar for use with Gource

DownloadAvatarsForGource.php

<?php

// Place in any subfolder of your project, run `php DownloadAvatarsForGource.php`

$list = shell_exec('git shortlog -sne');
if (!$list) {
	return;
}

$lines = explode("\n", $list);

$context = stream_context_create(["http" => ["header"  => "User-agent: DownloadAvatarsForGource"]]);

foreach ($lines as $line) {
	$line = trim($line, " 0123456789>");
	$line = explode('<', $line);
	$line = array_filter($line);
	$user = array_values($line);
	$user[0] = trim($user[0]);

	if (!empty($user[1])) {
		$dataUrl = 'https://api.github.com/search/users?utf8=%E2%9C%93&q='.$user[1].'+in%3Aemail&type=Users';
		$data = @file_get_contents($dataUrl, false, $context);
		if ($data !== false) {
			$data = json_decode($data, true);
			if (!empty($data['items'][0]['avatar_url'])) {
				$image = @file_get_contents($data['items'][0]['avatar_url'], false, $context);
				if ($image != false) {
					file_put_contents($user[0].'.png', $image);
					continue;
				}
			}
		}
	}

	$image = @file_get_contents('https://github.com/'.$user[0].'.png', false, $context);
	if ($image != false) {
		file_put_contents($user[0].'.png', $image);
		continue;
	}

	if ($user[1]) {
		$image = @file_get_contents('http://www.gravatar.com/avatar/'.md5($user[1])."?d=identicon&s=256", false, $context);
		if ($image != false) {
			file_put_contents($user[0].'.png', $image);
			continue;
		}
	}
}