mirror of
https://github.com/danog/parallel.git
synced 2024-12-11 16:49:51 +01:00
375 lines
11 KiB
PHP
375 lines
11 KiB
PHP
<?php
|
|
|
|
namespace Amp\Parallel\Context;
|
|
|
|
use Amp\Loop;
|
|
use Amp\Parallel\Sync\ChannelException;
|
|
use Amp\Parallel\Sync\ExitResult;
|
|
use Amp\Parallel\Sync\SynchronizationError;
|
|
use Amp\Process\Process as BaseProcess;
|
|
use Amp\Process\ProcessInputStream;
|
|
use Amp\Process\ProcessOutputStream;
|
|
use Amp\Promise;
|
|
use function Amp\call;
|
|
|
|
final class Process implements Context
|
|
{
|
|
const SCRIPT_PATH = __DIR__ . "/Internal/process-runner.php";
|
|
const KEY_LENGTH = 32;
|
|
|
|
/** @var string|null External version of SCRIPT_PATH if inside a PHAR. */
|
|
private static $pharScriptPath;
|
|
|
|
/** @var string|null PHAR path with a '.phar' extension. */
|
|
private static $pharCopy;
|
|
|
|
/** @var string|null Cached path to located PHP binary. */
|
|
private static $binaryPath;
|
|
|
|
/** @var Internal\ProcessHub */
|
|
private $hub;
|
|
|
|
/** @var \Amp\Process\Process */
|
|
private $process;
|
|
|
|
/** @var \Amp\Parallel\Sync\ChannelledSocket */
|
|
private $channel;
|
|
|
|
/**
|
|
* Creates and starts the process at the given path using the optional PHP binary path.
|
|
*
|
|
* @param string|array $script Path to PHP script or array with first element as path and following elements options
|
|
* to the PHP script (e.g.: ['bin/worker', 'Option1Value', 'Option2Value'].
|
|
* @param string|null $cwd Working directory.
|
|
* @param mixed[] $env Array of environment variables.
|
|
* @param string $binary Path to PHP binary. Null will attempt to automatically locate the binary.
|
|
*
|
|
* @return Promise<Process>
|
|
*/
|
|
public static function run($script, string $cwd = null, array $env = [], string $binary = null): Promise
|
|
{
|
|
$process = new self($script, $cwd, $env, $binary);
|
|
return call(function () use ($process) {
|
|
yield $process->start();
|
|
return $process;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* @param string|array $script Path to PHP script or array with first element as path and following elements options
|
|
* to the PHP script (e.g.: ['bin/worker', 'Option1Value', 'Option2Value'].
|
|
* @param string|null $cwd Working directory.
|
|
* @param mixed[] $env Array of environment variables.
|
|
* @param string $binary Path to PHP binary. Null will attempt to automatically locate the binary.
|
|
*
|
|
* @throws \Error If the PHP binary path given cannot be found or is not executable.
|
|
*/
|
|
public function __construct($script, string $cwd = null, array $env = [], string $binary = null)
|
|
{
|
|
$this->hub = Loop::getState(self::class);
|
|
if (!$this->hub instanceof Internal\ProcessHub) {
|
|
$this->hub = new Internal\ProcessHub;
|
|
Loop::setState(self::class, $this->hub);
|
|
}
|
|
|
|
$options = [
|
|
"html_errors" => "0",
|
|
"display_errors" => "0",
|
|
"log_errors" => "1",
|
|
];
|
|
|
|
if ($binary === null) {
|
|
if (\PHP_SAPI === "cli") {
|
|
$binary = \PHP_BINARY;
|
|
} else {
|
|
$binary = self::$binaryPath ?? self::locateBinary();
|
|
}
|
|
} elseif (!\is_executable($binary)) {
|
|
throw new \Error(\sprintf("The PHP binary path '%s' was not found or is not executable", $binary));
|
|
}
|
|
|
|
// Write process runner to external file if inside a PHAR,
|
|
// because PHP can't open files inside a PHAR directly except for the stub.
|
|
if (\strpos(self::SCRIPT_PATH, "phar://") === 0) {
|
|
if (self::$pharScriptPath) {
|
|
$scriptPath = self::$pharScriptPath;
|
|
} else {
|
|
$path = \dirname(self::SCRIPT_PATH);
|
|
|
|
if (\substr(\Phar::running(false), -5) !== ".phar") {
|
|
self::$pharCopy = \sys_get_temp_dir() . "/phar-" . \bin2hex(\random_bytes(10)) . ".phar";
|
|
\copy(\Phar::running(false), self::$pharCopy);
|
|
|
|
\register_shutdown_function(static function () {
|
|
@\unlink(self::$pharCopy);
|
|
});
|
|
|
|
$path = "phar://" . self::$pharCopy . "/" . \substr($path, \strlen(\Phar::running(true)));
|
|
}
|
|
|
|
$contents = \file_get_contents(self::SCRIPT_PATH);
|
|
$contents = \str_replace("__DIR__", \var_export($path, true), $contents);
|
|
self::$pharScriptPath = $scriptPath = \tempnam(\sys_get_temp_dir(), "amp-process-runner-");
|
|
\file_put_contents($scriptPath, $contents);
|
|
|
|
\register_shutdown_function(static function () {
|
|
@\unlink(self::$pharScriptPath);
|
|
});
|
|
}
|
|
|
|
// Monkey-patch the script path in the same way, only supported if the command is given as array.
|
|
if (isset(self::$pharCopy) && \is_array($script) && isset($script[0])) {
|
|
$script[0] = "phar://" . self::$pharCopy . \substr($script[0], \strlen(\Phar::running(true)));
|
|
}
|
|
} else {
|
|
$scriptPath = self::SCRIPT_PATH;
|
|
}
|
|
|
|
if (\is_array($script)) {
|
|
$script = \implode(" ", \array_map("escapeshellarg", $script));
|
|
} else {
|
|
$script = \escapeshellarg($script);
|
|
}
|
|
|
|
$command = \implode(" ", [
|
|
\escapeshellarg($binary),
|
|
$this->formatOptions($options),
|
|
\escapeshellarg($scriptPath),
|
|
$this->hub->getUri(),
|
|
$script,
|
|
]);
|
|
|
|
$this->process = new BaseProcess($command, $cwd, $env);
|
|
}
|
|
|
|
private static function locateBinary(): string
|
|
{
|
|
$executable = \strncasecmp(\PHP_OS, "WIN", 3) === 0 ? "php.exe" : "php";
|
|
|
|
$paths = \array_filter(\explode(\PATH_SEPARATOR, \getenv("PATH")));
|
|
$paths[] = \PHP_BINDIR;
|
|
$paths = \array_unique($paths);
|
|
|
|
foreach ($paths as $path) {
|
|
$path .= \DIRECTORY_SEPARATOR . $executable;
|
|
if (\is_executable($path)) {
|
|
return self::$binaryPath = $path;
|
|
}
|
|
}
|
|
|
|
throw new \Error("Could not locate PHP executable binary");
|
|
}
|
|
|
|
private function formatOptions(array $options)
|
|
{
|
|
$result = [];
|
|
|
|
foreach ($options as $option => $value) {
|
|
$result[] = \sprintf("-d%s=%s", $option, $value);
|
|
}
|
|
|
|
return \implode(" ", $result);
|
|
}
|
|
|
|
/**
|
|
* Private method to prevent cloning.
|
|
*/
|
|
private function __clone()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function start(): Promise
|
|
{
|
|
return call(function () {
|
|
try {
|
|
$pid = yield $this->process->start();
|
|
|
|
yield $this->process->getStdin()->write($this->hub->generateKey($pid, self::KEY_LENGTH));
|
|
|
|
$this->channel = yield $this->hub->accept($pid);
|
|
|
|
return $pid;
|
|
} catch (\Throwable $exception) {
|
|
$this->process->kill();
|
|
throw new ContextException("Starting the process failed", 0, $exception);
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function isRunning(): bool
|
|
{
|
|
return $this->process->isRunning();
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function receive(): Promise
|
|
{
|
|
if ($this->channel === null) {
|
|
throw new StatusError("The process has not been started");
|
|
}
|
|
|
|
return call(function () {
|
|
try {
|
|
$data = yield $this->channel->receive();
|
|
} catch (ChannelException $e) {
|
|
throw new ContextException("The context stopped responding, potentially due to a fatal error or calling exit", 0, $e);
|
|
}
|
|
|
|
if ($data instanceof ExitResult) {
|
|
$data = $data->getResult();
|
|
throw new SynchronizationError(\sprintf(
|
|
'Process unexpectedly exited with result of type: %s',
|
|
\is_object($data) ? \get_class($data) : \gettype($data)
|
|
));
|
|
}
|
|
|
|
return $data;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function send($data): Promise
|
|
{
|
|
if ($this->channel === null) {
|
|
throw new StatusError("The process has not been started");
|
|
}
|
|
|
|
if ($data instanceof ExitResult) {
|
|
throw new \Error("Cannot send exit result objects");
|
|
}
|
|
|
|
return $this->channel->send($data);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function join(): Promise
|
|
{
|
|
if ($this->channel === null) {
|
|
throw new StatusError("The process has not been started");
|
|
}
|
|
|
|
return call(function () {
|
|
try {
|
|
$data = yield $this->channel->receive();
|
|
} catch (\Throwable $exception) {
|
|
if ($this->isRunning()) {
|
|
$this->kill();
|
|
}
|
|
throw new ContextException("Failed to receive result from process", 0, $exception);
|
|
}
|
|
|
|
if (!$data instanceof ExitResult) {
|
|
if ($this->isRunning()) {
|
|
$this->kill();
|
|
}
|
|
throw new SynchronizationError("Did not receive an exit result from process");
|
|
}
|
|
|
|
$this->channel->close();
|
|
|
|
$code = yield $this->process->join();
|
|
if ($code !== 0) {
|
|
throw new ContextException(\sprintf("Process exited with code %d", $code));
|
|
}
|
|
|
|
|
|
return $data->getResult();
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Send a signal to the process.
|
|
*
|
|
* @see \Amp\Process\Process::signal()
|
|
*
|
|
* @param int $signo
|
|
*
|
|
* @throws \Amp\Process\ProcessException
|
|
* @throws \Amp\Process\StatusError
|
|
*/
|
|
public function signal(int $signo)
|
|
{
|
|
$this->process->signal($signo);
|
|
}
|
|
|
|
/**
|
|
* Returns the PID of the process.
|
|
*
|
|
* @see \Amp\Process\Process::getPid()
|
|
*
|
|
* @return int
|
|
*
|
|
* @throws \Amp\Process\StatusError
|
|
*/
|
|
public function getPid(): int
|
|
{
|
|
return $this->process->getPid();
|
|
}
|
|
|
|
/**
|
|
* Returns the STDIN stream of the process.
|
|
*
|
|
* @see \Amp\Process\Process::getStdin()
|
|
*
|
|
* @return ProcessOutputStream
|
|
*
|
|
* @throws \Amp\Process\StatusError
|
|
*/
|
|
public function getStdin(): ProcessOutputStream
|
|
{
|
|
return $this->process->getStdin();
|
|
}
|
|
|
|
/**
|
|
* Returns the STDOUT stream of the process.
|
|
*
|
|
* @see \Amp\Process\Process::getStdout()
|
|
*
|
|
* @return ProcessInputStream
|
|
*
|
|
* @throws \Amp\Process\StatusError
|
|
*/
|
|
public function getStdout(): ProcessInputStream
|
|
{
|
|
return $this->process->getStdout();
|
|
}
|
|
|
|
/**
|
|
* Returns the STDOUT stream of the process.
|
|
*
|
|
* @see \Amp\Process\Process::getStderr()
|
|
*
|
|
* @return ProcessInputStream
|
|
*
|
|
* @throws \Amp\Process\StatusError
|
|
*/
|
|
public function getStderr(): ProcessInputStream
|
|
{
|
|
return $this->process->getStderr();
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function kill()
|
|
{
|
|
$this->process->kill();
|
|
|
|
if ($this->channel !== null) {
|
|
$this->channel->close();
|
|
}
|
|
}
|
|
}
|