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patchtester/administrator/components/com_patchtester/PatchTester/Model/PullModel.php
2015-06-16 15:14:41 -04:00

361 lines
8.6 KiB
PHP

<?php
/**
* Patch testing component for the Joomla! CMS
*
* @copyright Copyright (C) 2011 - 2012 Ian MacLennan, Copyright (C) 2013 - 2015 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later
*/
namespace PatchTester\Model;
use Joomla\Registry\Registry;
use PatchTester\Helper;
/**
* Methods supporting pull requests.
*
* @since 2.0
*/
class PullModel extends \JModelBase
{
/**
* Array containing top level non-production folders
*
* @var array
* @since 2.0
*/
protected $nonProductionFolders = array('build', 'docs', 'installation', 'tests');
/**
* Method to parse a patch and extract the affected files
*
* @param string $patch Patch file to parse
*
* @return array Array of files within a patch
*
* @since 2.0
*/
protected function parsePatch($patch)
{
$state = 0;
$files = array();
$lines = explode("\n", $patch);
foreach ($lines AS $line)
{
switch ($state)
{
case 0:
if (strpos($line, 'diff --git') === 0)
{
$state = 1;
}
$file = new \stdClass;
$file->action = 'modified';
break;
case 1:
if (strpos($line, 'index') === 0)
{
$file->index = substr($line, 6);
}
if (strpos($line, '---') === 0)
{
$file->old = substr($line, 6);
}
if (strpos($line, '+++') === 0)
{
$file->new = substr($line, 6);
}
if (strpos($line, 'new file mode') === 0)
{
$file->action = 'added';
}
if (strpos($line, 'deleted file mode') === 0)
{
$file->action = 'deleted';
}
// Binary files are presently unsupported, use this to reset the parser in the meantime
if (strpos($line, 'Binary files') === 0)
{
$state = 0;
}
if (strpos($line, '@@') === 0)
{
$state = 0;
/*
* Check if the patch tester is running in a production environment
* If so, do not patch certain files as errors will be thrown
*/
if (!file_exists(JPATH_ROOT . '/installation/index.php'))
{
$filePath = explode('/', $file->new);
if (in_array($filePath[0], $this->nonProductionFolders))
{
continue;
}
}
$files[] = $file;
}
break;
}
}
return $files;
}
/**
* Patches the code with the supplied pull request
*
* @param integer $id ID of the pull request to apply
*
* @return boolean
*
* @since 2.0
* @throws \RuntimeException
*/
public function apply($id)
{
// Get the Github object
$github = Helper::initializeGithub();
try
{
$rate = $github->authorization->getRateLimit();
}
catch (\Exception $e)
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_COULD_NOT_CONNECT_TO_GITHUB', $e->getMessage()), $e->getCode(), $e);
}
// If over the API limit, we can't build this list
if ($rate->resources->core->remaining == 0)
{
throw new \RuntimeException(
\JText::sprintf('COM_PATCHTESTER_API_LIMIT_LIST', \JFactory::getDate($rate->resources->core->reset))
);
}
try
{
$pull = $github->pulls->get($this->getState()->get('github_user'), $this->getState()->get('github_repo'), $id);
}
catch (\Exception $e)
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_COULD_NOT_CONNECT_TO_GITHUB', $e->getMessage()), $e->getCode(), $e);
}
if (is_null($pull->head->repo))
{
throw new \RuntimeException(\JText::_('COM_PATCHTESTER_REPO_IS_GONE'));
}
// Set up the JHttp object
$options = new Registry;
$options->set('userAgent', 'JPatchTester/2.0');
$options->set('timeout', 120);
$transport = \JHttpFactory::getHttp($options);
try
{
$patch = $transport->get($pull->diff_url)->body;
}
catch (\Exception $e)
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_COULD_NOT_CONNECT_TO_GITHUB', $e->getMessage()), $e->getCode(), $e);
}
$files = $this->parsePatch($patch);
if (!$files)
{
return false;
}
foreach ($files as $file)
{
if ($file->action == 'deleted' && !file_exists(JPATH_ROOT . '/' . $file->old))
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_FILE_DELETED_DOES_NOT_EXIST_S', $file->old));
}
if ($file->action == 'added' || $file->action == 'modified')
{
// If the backup file already exists, we can't apply the patch
if (file_exists(JPATH_COMPONENT . '/backups/' . md5($file->new) . '.txt'))
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_CONFLICT_S', $file->new));
}
if ($file->action == 'modified' && !file_exists(JPATH_ROOT . '/' . $file->old))
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_FILE_MODIFIED_DOES_NOT_EXIST_S', $file->old));
}
$url = 'https://raw.github.com/' . urlencode($pull->head->user->login) . '/' . urlencode($pull->head->repo->name)
. '/' . urlencode($pull->head->ref) . '/' . $file->new;
try
{
$file->body = $transport->get($url)->body;
}
catch (\Exception $e)
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_COULD_NOT_CONNECT_TO_GITHUB', $e->getMessage()), $e->getCode(), $e);
}
}
}
jimport('joomla.filesystem.file');
// At this point, we have ensured that we have all the new files and there are no conflicts
foreach ($files as $file)
{
// We only create a backup if the file already exists
if ($file->action == 'deleted' || (file_exists(JPATH_ROOT . '/' . $file->new) && $file->action == 'modified'))
{
if (!\JFile::copy(\JPath::clean(JPATH_ROOT . '/' . $file->old), JPATH_COMPONENT . '/backups/' . md5($file->old) . '.txt'))
{
throw new \RuntimeException(
\JText::sprintf(
'COM_PATCHTESTER_ERROR_CANNOT_COPY_FILE',
JPATH_ROOT . '/' . $file->old,
JPATH_COMPONENT . '/backups/' . md5($file->old) . '.txt'
)
);
}
}
switch ($file->action)
{
case 'modified':
case 'added':
if (!\JFile::write(\JPath::clean(JPATH_ROOT . '/' . $file->new), $file->body))
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_ERROR_CANNOT_WRITE_FILE', JPATH_ROOT . '/' . $file->new));
}
break;
case 'deleted':
if (!\JFile::delete(\JPath::clean(JPATH_ROOT . '/' . $file->old)))
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_ERROR_CANNOT_DELETE_FILE', JPATH_ROOT . '/' . $file->old));
}
break;
}
}
$table = \JTable::getInstance('TestsTable', '\\PatchTester\\Table\\');
$table->pull_id = $pull->number;
$table->data = json_encode($files);
$table->patched_by = \JFactory::getUser()->id;
$table->applied = 1;
$table->applied_version = JVERSION;
if (!$table->store())
{
throw new \RuntimeException($table->getError());
}
return true;
}
/**
* Reverts the specified pull request
*
* @param integer $id ID of the pull request to Reverts
*
* @return boolean
*
* @since 2.0
* @throws \RuntimeException
*/
public function revert($id)
{
$table = \JTable::getInstance('TestsTable', '\\PatchTester\\Table\\');
$table->load($id);
// We don't want to restore files from an older version
if ($table->applied_version != JVERSION)
{
$table->delete();
return $this;
}
$files = json_decode($table->data);
if (!$files)
{
throw new \RuntimeException(\JText::sprintf('COM_PATCHTESTER_ERROR_READING_DATABASE_TABLE', __METHOD__, htmlentities($table->data)));
}
jimport('joomla.filesystem.file');
foreach ($files as $file)
{
switch ($file->action)
{
case 'deleted':
case 'modified':
if (!\JFile::copy(JPATH_COMPONENT . '/backups/' . md5($file->old) . '.txt', JPATH_ROOT . '/' . $file->old))
{
throw new \RuntimeException(
\JText::sprintf(
'COM_PATCHTESTER_ERROR_CANNOT_COPY_FILE',
JPATH_COMPONENT . '/backups/' . md5($file->old) . '.txt',
JPATH_ROOT . '/' . $file->old
)
);
}
if (file_exists(JPATH_COMPONENT . '/backups/' . md5($file->old) . '.txt'))
{
if (!\JFile::delete(JPATH_COMPONENT . '/backups/' . md5($file->old) . '.txt'))
{
throw new \RuntimeException(
\JText::sprintf('COM_PATCHTESTER_ERROR_CANNOT_DELETE_FILE', JPATH_COMPONENT . '/backups/' . md5($file->old) . '.txt')
);
}
}
break;
case 'added':
if (file_exists(JPATH_ROOT . '/' . $file->new))
{
if (!\JFile::delete(JPATH_ROOT . '/' . $file->new))
{
throw new \RuntimeException(
\JText::sprintf('COM_PATCHTESTER_ERROR_CANNOT_DELETE_FILE', JPATH_ROOT . '/' . $file->new)
);
}
}
break;
}
}
$table->delete();
return true;
}
}