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[AsseticBundle] added a --watch option to the assetic:dump command #109

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Merged
3 commits merged into from
Feb 27, 2011
Merged

[AsseticBundle] added a --watch option to the assetic:dump command #109

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8025665
[AsseticBundle] added a --watch option to the assetic:dump command
kriswallsmith Feb 25, 2011
4816b9e
[AsseticBundle] added a simple cache to --watch so it picks up where …
kriswallsmith Feb 25, 2011
3ce1d82
[AsseticBundle] added error handling to --watch
kriswallsmith Feb 25, 2011
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122 changes: 112 additions & 10 deletions src/Symfony/Bundle/AsseticBundle/Command/DumpCommand.php
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Original file line number Diff line number Diff line change
Expand Up @@ -11,9 +11,12 @@

namespace Symfony\Bundle\AsseticBundle\Command;

use Assetic\Asset\AssetInterface;
use Assetic\Factory\LazyAssetManager;
use Symfony\Bundle\FrameworkBundle\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

/**
Expand All @@ -29,6 +32,7 @@ protected function configure()
->setName('assetic:dump')
->setDescription('Dumps all assets to the filesystem')
->addArgument('base_dir', InputArgument::OPTIONAL, 'The base directory')
->addOption('watch', null, InputOption::VALUE_NONE, 'Check for changes every second')
;
}

Expand All @@ -39,18 +43,116 @@ protected function execute(InputInterface $input, OutputInterface $output)
}

$am = $this->container->get('assetic.asset_manager');
foreach ($am->all() as $name => $asset) {
$output->writeln('<info>[asset]</info> '.$name);
$asset->load();

$target = $baseDir . '/' . $asset->getTargetUrl();
if (!is_dir($dir = dirname($target))) {
$output->writeln('<info>[dir+]</info> '.$dir);
mkdir($dir);

if ($input->getOption('watch')) {
return $this->watch($am, $baseDir, $output, $this->container->getParameter('kernel.debug'));
}

foreach ($am->getNames() as $name) {
$this->dumpAsset($am->get($name), $baseDir, $output);
}
}

/**
* Watches a asset manager for changes.
*
* This method includes an infinite loop the continuously polls the asset
* manager for changes.
*
* @param LazyAssetManager $am The asset manager
* @param string $baseDir The base directory to write to
* @param OutputInterface $output The command output
* @param Boolean $debug Debug mode
*/
protected function watch(LazyAssetManager $am, $baseDir, OutputInterface $output, $debug = false)
{
$refl = new \ReflectionClass('Assetic\\AssetManager');
$prop = $refl->getProperty('assets');
$prop->setAccessible(true);

$cache = sys_get_temp_dir().'/assetic_watch_'.substr(sha1($baseDir), 0, 7);
if (file_exists($cache)) {
$previously = unserialize(file_get_contents($cache));
} else {
$previously = array();
}

$error = '';
while (true) {
try {
foreach ($am->getNames() as $name) {
if ($asset = $this->checkAsset($am, $name, $previously)) {
$this->dumpAsset($asset, $baseDir, $output);
}
}

// reset the asset manager
$prop->setValue($am, array());
if ($debug) {
$am->load();
}

file_put_contents($cache, serialize($previously));
$error = '';

sleep(1);
} catch (\Exception $e) {
if ($error != $msg = $e->getMessage()) {
$output->writeln('<error>[error]</error> '.$msg);
$error = $msg;
}
}
}
}

/**
* Checks if an asset should be dumped.
*
* @param LazyAssetManager $am The asset manager
* @param string $name The asset name
* @param array $previously An array of previous visits
*
* @return AssetInterface|Boolean The asset if it should be dumped
*/
protected function checkAsset(LazyAssetManager $am, $name, array &$previously)
{
$formula = $am->hasFormula($name) ? serialize($am->getFormula($name)) : null;
$asset = $am->get($name);
$mtime = $asset->getLastModified();

if (isset($previously[$name])) {
$changed = $previously[$name]['mtime'] != $mtime || $previously[$name]['formula'] != $formula;
} else {
$changed = true;
}

$previously[$name] = array('mtime' => $mtime, 'formula' => $formula);

return $changed ? $asset : false;
}

/**
* Writes an asset.
*
* @param AssetInterface $asset An asset
* @param string $baseDir The base directory to write to
* @param OutputInterface $output The command output
*
* @throws RuntimeException If there is a problem writing the asset
*/
protected function dumpAsset(AssetInterface $asset, $baseDir, OutputInterface $output)
{
$target = rtrim($baseDir, '/') . '/' . $asset->getTargetUrl();
if (!is_dir($dir = dirname($target))) {
$output->writeln('<info>[dir+]</info> '.$dir);
if (false === @mkdir($dir)) {
throw new \RuntimeException('Unable to create directory '.$dir);
}
}

$output->writeln('<info>[file+]</info> '.$asset->getTargetUrl());
file_put_contents($target, $asset->dump());
$output->writeln('<info>[file+]</info> '.$target);
if (false === @file_put_contents($target, $asset->dump())) {
throw new \RuntimeException('Unable to write file '.$target);
}
}
}