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PhabricatorAphlictManagementWorkflow.php
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Thu, Dec 19, 19:02

PhabricatorAphlictManagementWorkflow.php
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<?php
abstract class PhabricatorAphlictManagementWorkflow
extends PhabricatorManagementWorkflow {
private $debug = false;
private $clientHost;
public function didConstruct() {
$this
->setArguments(
array(
array(
'name' => 'client-host',
'param' => 'hostname',
'help' => pht('Hostname to bind to for the client server.'),
),
));
}
public function execute(PhutilArgumentParser $args) {
$this->clientHost = $args->getArg('client-host');
return 0;
}
final public function getPIDPath() {
return PhabricatorEnv::getEnvConfig('notification.pidfile');
}
final public function getPID() {
$pid = null;
if (Filesystem::pathExists($this->getPIDPath())) {
$pid = (int)Filesystem::readFile($this->getPIDPath());
}
return $pid;
}
final public function cleanup($signo = '?') {
global $g_future;
if ($g_future) {
$g_future->resolveKill();
$g_future = null;
}
Filesystem::remove($this->getPIDPath());
exit(1);
}
protected final function setDebug($debug) {
$this->debug = $debug;
}
public static function requireExtensions() {
self::mustHaveExtension('pcntl');
self::mustHaveExtension('posix');
}
private static function mustHaveExtension($ext) {
if (!extension_loaded($ext)) {
echo "ERROR: The PHP extension '{$ext}' is not installed. You must ".
"install it to run aphlict on this machine.\n";
exit(1);
}
$extension = new ReflectionExtension($ext);
foreach ($extension->getFunctions() as $function) {
$function = $function->name;
if (!function_exists($function)) {
echo "ERROR: The PHP function {$function}() is disabled. You must ".
"enable it to run aphlict on this machine.\n";
exit(1);
}
}
}
final protected function willLaunch() {
$console = PhutilConsole::getConsole();
$pid = $this->getPID();
if ($pid) {
throw new PhutilArgumentUsageException(
pht(
'Unable to start notifications server because it is already '.
'running. Use `aphlict restart` to restart it.'));
}
if (posix_getuid() == 0) {
throw new PhutilArgumentUsageException(
pht(
// TODO: Update this message after a while.
'The notification server should not be run as root. It no '.
'longer requires access to privileged ports.'));
}
// Make sure we can write to the PID file.
if (!$this->debug) {
Filesystem::writeFile($this->getPIDPath(), '');
}
// First, start the server in configuration test mode with --test. This
// will let us error explicitly if there are missing modules, before we
// fork and lose access to the console.
$test_argv = $this->getServerArgv();
$test_argv[] = '--test=true';
execx(
'%s %s %Ls',
$this->getNodeBinary(),
$this->getAphlictScriptPath(),
$test_argv);
}
private function getServerArgv() {
$ssl_key = PhabricatorEnv::getEnvConfig('notification.ssl-key');
$ssl_cert = PhabricatorEnv::getEnvConfig('notification.ssl-cert');
$server_uri = PhabricatorEnv::getEnvConfig('notification.server-uri');
$server_uri = new PhutilURI($server_uri);
$client_uri = PhabricatorEnv::getEnvConfig('notification.client-uri');
$client_uri = new PhutilURI($client_uri);
$log = PhabricatorEnv::getEnvConfig('notification.log');
$server_argv = array();
$server_argv[] = '--client-port='.$client_uri->getPort();
$server_argv[] = '--admin-port='.$server_uri->getPort();
$server_argv[] = '--admin-host='.$server_uri->getDomain();
if ($ssl_key) {
$server_argv[] = '--ssl-key='.$ssl_key;
}
if ($ssl_cert) {
$server_argv[] = '--ssl-cert='.$ssl_cert;
}
if (!$this->debug) {
$server_argv[] = '--log='.$log;
}
if ($this->clientHost) {
$server_argv[] = '--client-host='.$this->clientHost;
}
return $server_argv;
}
private function getAphlictScriptPath() {
$root = dirname(phutil_get_library_root('phabricator'));
return $root.'/support/aphlict/server/aphlict_server.js';
}
final protected function launch() {
$console = PhutilConsole::getConsole();
if ($this->debug) {
$console->writeOut(pht("Starting Aphlict server in foreground...\n"));
} else {
Filesystem::writeFile($this->getPIDPath(), getmypid());
}
$command = csprintf(
'%s %s %Ls',
$this->getNodeBinary(),
$this->getAphlictScriptPath(),
$this->getServerArgv());
if (!$this->debug) {
declare(ticks = 1);
pcntl_signal(SIGINT, array($this, 'cleanup'));
pcntl_signal(SIGTERM, array($this, 'cleanup'));
}
register_shutdown_function(array($this, 'cleanup'));
if ($this->debug) {
$console->writeOut("Launching server:\n\n $ ".$command."\n\n");
$err = phutil_passthru('%C', $command);
$console->writeOut(">>> Server exited!\n");
exit($err);
} else {
while (true) {
global $g_future;
$g_future = new ExecFuture('exec %C', $command);
$g_future->resolve();
// If the server exited, wait a couple of seconds and restart it.
unset($g_future);
sleep(2);
}
}
}
/* -( Commands )----------------------------------------------------------- */
final protected function executeStartCommand() {
$console = PhutilConsole::getConsole();
$this->willLaunch();
$pid = pcntl_fork();
if ($pid < 0) {
throw new Exception('Failed to fork()!');
} else if ($pid) {
$console->writeErr(pht("Aphlict Server started.\n"));
exit(0);
}
// When we fork, the child process will inherit its parent's set of open
// file descriptors. If the parent process of bin/aphlict is waiting for
// bin/aphlict's file descriptors to close, it will be stuck waiting on
// the daemonized process. (This happens if e.g. bin/aphlict is started
// in another script using passthru().)
fclose(STDOUT);
fclose(STDERR);
$this->launch();
return 0;
}
final protected function executeStopCommand() {
$console = PhutilConsole::getConsole();
$pid = $this->getPID();
if (!$pid) {
$console->writeErr(pht("Aphlict is not running.\n"));
return 0;
}
$console->writeErr(pht("Stopping Aphlict Server (%s)...\n", $pid));
posix_kill($pid, SIGINT);
$start = time();
do {
if (!PhabricatorDaemonReference::isProcessRunning($pid)) {
$console->writeOut(
"%s\n",
pht('Aphlict Server (%s) exited normally.', $pid));
$pid = null;
break;
}
usleep(100000);
} while (time() < $start + 5);
if ($pid) {
$console->writeErr(pht('Sending %s a SIGKILL.', $pid)."\n");
posix_kill($pid, SIGKILL);
unset($pid);
}
Filesystem::remove($this->getPIDPath());
return 0;
}
private function getNodeBinary() {
if (Filesystem::binaryExists('nodejs')) {
return 'nodejs';
}
if (Filesystem::binaryExists('node')) {
return 'node';
}
throw new PhutilArgumentUsageException(
pht(
'No `nodejs` or `node` binary was found in $PATH. You must install '.
'Node.js to start the Aphlict server.'));
}
}

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