WordPress SVN Update Plugin

<?php
// Adds the admin page to the wp-admin navigation
function sv_svn_update_pages() {
		add_options_page('SVN Update', 'SVN Update', 8, __FILE__, 'sv_svn_update_page');
}
add_action('admin_menu', 'sv_svn_update_pages');

// Returns array with revision number and path
function sv_template_svn_info() {
	$result = array();
	$info = shell_exec('svn info ' . trailingslashit(TEMPLATEPATH));
	if (preg_match('/Revision: (.*)/', $info, $matches))
		$result['revision'] = intval($matches[1]);
	if (preg_match('/URL: (.*)/', $info, $matches))
			$result['url'] = $matches[1];
	if (preg_match('/Path: (.*)/', $info, $matches))
			$result['path'] = $matches[1];
	return $result;
}
function sv_svn_info($url) {
	$result = array();
	$info = shell_exec('svn info ' . $url );
	if (preg_match('/Revision: (.*)/', $info, $matches))
		$result['revision'] = intval($matches[1]);
	return $result;
}
// Updates the path submitted
function sv_svn_update($path = '') {
	passthru('svn update ' . $path );

}
// Admin Page
function sv_svn_update_page() {
	$info = sv_template_svn_info();
	$svn_info = sv_svn_info($info['url']);
?>
	<div class="wrap">
		<h2><?php _e('SVN Update') ?></h2>

		<?php if (isset($_GET['update'])) : ?>
		
		<h3><?php _e('Updating') ?></h3>
		<pre style="white-space:pre-wrap;"><?php sv_svn_update($_GET['path']) ?></pre>
		
		<?php else : ?>
		
		<h3><?php _e('SVN Update') ?></h3>
		<form method="get" action="options-general.php">
		<table class="form-table">
			<tbody>
				<tr>
			<th scope="row"><?php _e('Current Revision') ?></th>
			<td>
				<?php echo htmlspecialchars($svn_info['revision']) ?>
			</td>
			</tr>
			<th scope="row"><?php _e('Local Revision') ?></th>
			<td>
				<?php echo htmlspecialchars($info['revision']) ?>
			</td>
			</tr>
			<tr>
			<th scope="row"><?php _e('Path to update') ?></th>
			<td>
				<input type="text" id="path" name="path" size="62" value="<?php echo htmlspecialchars($info['path']) ?>" />
				<p><small><?php _e('Change to any local path to update. Defaults to template path.'); ?></small></p>
			</td>
				</tr>
			</tbody>
		</table>

		<p class="submit">
			<input type="hidden" name="page" value="<?php echo htmlspecialchars($_GET['page']) ?>" />
			<input type="submit" name="update" value="<?php _e('Update') ?>" />
		</p>
		
		<h3><?php _e('SVN Info - Template Path') ?></h3>
		<?php
			echo '<pre style="white-space:pre-wrap;">';
			print_r( shell_exec('svn info '. trailingslashit(TEMPLATEPATH)) );
			echo '</pre>';
		?>
		<h3><?php _e('SVN Info - WordPress Install') ?></h3>
		<?php
			echo '<pre style="white-space:pre-wrap;">';
			print_r( shell_exec('svn info ..') );
			echo '</pre>';
		?>
		</form>
		
		<?php endif; ?>
	</div>
<?
}