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phorge/src/applications/diffusion/protocol/DiffusionCommandEngine.php
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DiffusionCommandEngine.php
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<?php
abstract class DiffusionCommandEngine extends Phobject {
private $repository;
private $protocol;
private $credentialPHID;
private $argv;
private $passthru;
private $connectAsDevice;
private $sudoAsDaemon;
private $uri;
public static function newCommandEngine(PhabricatorRepository $repository) {
$engines = self::newCommandEngines();
foreach ($engines as $engine) {
if ($engine->canBuildForRepository($repository)) {
return id(clone $engine)
->setRepository($repository);
}
}
throw new Exception(
pht(
'No registered command engine can build commands for this '.
'repository ("%s").',
$repository->getDisplayName()));
}
private static function newCommandEngines() {
return id(new PhutilClassMapQuery())
->setAncestorClass(__CLASS__)
->execute();
}
abstract protected function canBuildForRepository(
PhabricatorRepository $repository);
abstract protected function newFormattedCommand($pattern, array $argv);
abstract protected function newCustomEnvironment();
public function setRepository(PhabricatorRepository $repository) {
$this->repository = $repository;
return $this;
}
public function getRepository() {
return $this->repository;
}
public function setURI(PhutilURI $uri) {
$this->uri = $uri;
$this->setProtocol($uri->getProtocol());
return $this;
}
public function getURI() {
return $this->uri;
}
public function setProtocol($protocol) {
$this->protocol = $protocol;
return $this;
}
public function getProtocol() {
return $this->protocol;
}
public function getDisplayProtocol() {
return $this->getProtocol().'://';
}
public function setCredentialPHID($credential_phid) {
$this->credentialPHID = $credential_phid;
return $this;
}
public function getCredentialPHID() {
return $this->credentialPHID;
}
public function setArgv(array $argv) {
$this->argv = $argv;
return $this;
}
public function getArgv() {
return $this->argv;
}
public function setPassthru($passthru) {
$this->passthru = $passthru;
return $this;
}
public function getPassthru() {
return $this->passthru;
}
public function setConnectAsDevice($connect_as_device) {
$this->connectAsDevice = $connect_as_device;
return $this;
}
public function getConnectAsDevice() {
return $this->connectAsDevice;
}
public function setSudoAsDaemon($sudo_as_daemon) {
$this->sudoAsDaemon = $sudo_as_daemon;
return $this;
}
public function getSudoAsDaemon() {
return $this->sudoAsDaemon;
}
protected function shouldAlwaysSudo() {
return false;
}
public function newFuture() {
$argv = $this->newCommandArgv();
$env = $this->newCommandEnvironment();
$is_passthru = $this->getPassthru();
if ($this->getSudoAsDaemon() || $this->shouldAlwaysSudo()) {
$command = call_user_func_array('csprintf', $argv);
$command = PhabricatorDaemon::sudoCommandAsDaemonUser($command);
$argv = array('%C', $command);
}
if ($is_passthru) {
$future = newv('PhutilExecPassthru', $argv);
} else {
$future = newv('ExecFuture', $argv);
}
$future->setEnv($env);
// See T13108. By default, don't let any cluster command run indefinitely
// to try to avoid cases where `git fetch` hangs for some reason and we're
// left sitting with a held lock forever.
$repository = $this->getRepository();
if (!$is_passthru) {
$future->setTimeout($repository->getEffectiveCopyTimeLimit());
}
return $future;
}
private function newCommandArgv() {
$argv = $this->argv;
$pattern = $argv[0];
$argv = array_slice($argv, 1);
list($pattern, $argv) = $this->newFormattedCommand($pattern, $argv);
return array_merge(array($pattern), $argv);
}
private function newCommandEnvironment() {
$env = $this->newCommonEnvironment() + $this->newCustomEnvironment();
foreach ($env as $key => $value) {
if ($value === null) {
unset($env[$key]);
}
}
return $env;
}
private function newCommonEnvironment() {
$repository = $this->getRepository();
$env = array();
// NOTE: Force the language to "C", which overrides locale
// settings. This makes stuff print in English instead of, e.g., French,
// so we can parse the output of some commands, error messages, etc.
// Note that LANG can be ignored if there is LANGUAGE.
// https://we.phorge.it/T15872
$env['LC_ALL'] = 'C';
// Propagate PHABRICATOR_ENV explicitly. For discussion, see T4155.
$env['PHABRICATOR_ENV'] = PhabricatorEnv::getSelectedEnvironmentName();
$as_device = $this->getConnectAsDevice();
$credential_phid = $this->getCredentialPHID();
if ($as_device) {
$device = AlmanacKeys::getLiveDevice();
if (!$device) {
throw new Exception(
pht(
'Attempting to build a repository command (for repository "%s") '.
'as device, but this host ("%s") is not configured as a cluster '.
'device.',
$repository->getDisplayName(),
php_uname('n')));
}
if ($credential_phid) {
throw new Exception(
pht(
'Attempting to build a repository command (for repository "%s"), '.
'but the CommandEngine is configured to connect as both the '.
'current cluster device ("%s") and with a specific credential '.
'("%s"). These options are mutually exclusive. Connections must '.
'authenticate as one or the other, not both.',
$repository->getDisplayName(),
$device->getName(),
$credential_phid));
}
}
if ($this->isAnySSHProtocol()) {
if ($credential_phid) {
$env['PHABRICATOR_CREDENTIAL'] = $credential_phid;
}
if ($as_device) {
$env['PHABRICATOR_AS_DEVICE'] = 1;
}
}
$env += $repository->getPassthroughEnvironmentalVariables();
return $env;
}
public function isSSHProtocol() {
return ($this->getProtocol() == 'ssh');
}
public function isSVNProtocol() {
return ($this->getProtocol() == 'svn');
}
public function isSVNSSHProtocol() {
return ($this->getProtocol() == 'svn+ssh');
}
public function isHTTPProtocol() {
return ($this->getProtocol() == 'http');
}
public function isHTTPSProtocol() {
return ($this->getProtocol() == 'https');
}
public function isAnyHTTPProtocol() {
return ($this->isHTTPProtocol() || $this->isHTTPSProtocol());
}
public function isAnySSHProtocol() {
return ($this->isSSHProtocol() || $this->isSVNSSHProtocol());
}
public function isCredentialSupported() {
return ($this->getPassphraseProvidesCredentialType() !== null);
}
public function isCredentialOptional() {
if ($this->isAnySSHProtocol()) {
return false;
}
return true;
}
public function getPassphraseCredentialLabel() {
if ($this->isAnySSHProtocol()) {
return pht('SSH Key');
}
if ($this->isAnyHTTPProtocol() || $this->isSVNProtocol()) {
return pht('Password');
}
return null;
}
public function getPassphraseDefaultCredentialType() {
if ($this->isAnySSHProtocol()) {
return PassphraseSSHPrivateKeyTextCredentialType::CREDENTIAL_TYPE;
}
if ($this->isAnyHTTPProtocol() || $this->isSVNProtocol()) {
return PassphrasePasswordCredentialType::CREDENTIAL_TYPE;
}
return null;
}
public function getPassphraseProvidesCredentialType() {
if ($this->isAnySSHProtocol()) {
return PassphraseSSHPrivateKeyCredentialType::PROVIDES_TYPE;
}
if ($this->isAnyHTTPProtocol() || $this->isSVNProtocol()) {
return PassphrasePasswordCredentialType::PROVIDES_TYPE;
}
return null;
}
protected function getSSHWrapper() {
$root = dirname(phutil_get_library_root('phabricator'));
return $root.'/bin/ssh-connect';
}
}

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