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Index: scripts/ssh/ssh-exec.php
===================================================================
--- scripts/ssh/ssh-exec.php
+++ scripts/ssh/ssh-exec.php
@@ -61,6 +61,7 @@
$workflows = array(
new ConduitSSHWorkflow(),
+ new DiffusionSSHSubversionServeWorkflow(),
new DiffusionSSHMercurialServeWorkflow(),
new DiffusionSSHGitUploadPackWorkflow(),
new DiffusionSSHGitReceivePackWorkflow(),
Index: src/__phutil_library_map__.php
===================================================================
--- src/__phutil_library_map__.php
+++ src/__phutil_library_map__.php
@@ -547,10 +547,14 @@
'DiffusionSSHMercurialWireClientProtocolChannel' => 'applications/diffusion/ssh/DiffusionSSHMercurialWireClientProtocolChannel.php',
'DiffusionSSHMercurialWireTestCase' => 'applications/diffusion/ssh/__tests__/DiffusionSSHMercurialWireTestCase.php',
'DiffusionSSHMercurialWorkflow' => 'applications/diffusion/ssh/DiffusionSSHMercurialWorkflow.php',
+ 'DiffusionSSHSubversionServeWorkflow' => 'applications/diffusion/ssh/DiffusionSSHSubversionServeWorkflow.php',
+ 'DiffusionSSHSubversionWorkflow' => 'applications/diffusion/ssh/DiffusionSSHSubversionWorkflow.php',
'DiffusionSSHWorkflow' => 'applications/diffusion/ssh/DiffusionSSHWorkflow.php',
'DiffusionServeController' => 'applications/diffusion/controller/DiffusionServeController.php',
'DiffusionSetPasswordPanel' => 'applications/diffusion/panel/DiffusionSetPasswordPanel.php',
'DiffusionSetupException' => 'applications/diffusion/exception/DiffusionSetupException.php',
+ 'DiffusionSubversionWireProtocol' => 'applications/diffusion/protocol/DiffusionSubversionWireProtocol.php',
+ 'DiffusionSubversionWireProtocolTestCase' => 'applications/diffusion/protocol/__tests__/DiffusionSubversionWireProtocolTestCase.php',
'DiffusionSvnCommitParentsQuery' => 'applications/diffusion/query/parents/DiffusionSvnCommitParentsQuery.php',
'DiffusionSvnFileContentQuery' => 'applications/diffusion/query/filecontent/DiffusionSvnFileContentQuery.php',
'DiffusionSvnRawDiffQuery' => 'applications/diffusion/query/rawdiff/DiffusionSvnRawDiffQuery.php',
@@ -2816,10 +2820,14 @@
'DiffusionSSHMercurialWireClientProtocolChannel' => 'PhutilProtocolChannel',
'DiffusionSSHMercurialWireTestCase' => 'PhabricatorTestCase',
'DiffusionSSHMercurialWorkflow' => 'DiffusionSSHWorkflow',
+ 'DiffusionSSHSubversionServeWorkflow' => 'DiffusionSSHSubversionWorkflow',
+ 'DiffusionSSHSubversionWorkflow' => 'DiffusionSSHWorkflow',
'DiffusionSSHWorkflow' => 'PhabricatorSSHWorkflow',
'DiffusionServeController' => 'DiffusionController',
'DiffusionSetPasswordPanel' => 'PhabricatorSettingsPanel',
'DiffusionSetupException' => 'AphrontUsageException',
+ 'DiffusionSubversionWireProtocol' => 'Phobject',
+ 'DiffusionSubversionWireProtocolTestCase' => 'PhabricatorTestCase',
'DiffusionSvnCommitParentsQuery' => 'DiffusionCommitParentsQuery',
'DiffusionSvnFileContentQuery' => 'DiffusionFileContentQuery',
'DiffusionSvnRawDiffQuery' => 'DiffusionRawDiffQuery',
Index: src/applications/diffusion/protocol/DiffusionSubversionWireProtocol.php
===================================================================
--- /dev/null
+++ src/applications/diffusion/protocol/DiffusionSubversionWireProtocol.php
@@ -0,0 +1,188 @@
+<?php
+
+final class DiffusionSubversionWireProtocol extends Phobject {
+
+ private $buffer = '';
+ private $state = 'item';
+ private $expectBytes = 0;
+ private $byteBuffer = '';
+ private $stack = array();
+ private $list = array();
+ private $raw = '';
+
+ private function pushList() {
+ $this->stack[] = $this->list;
+ $this->list = array();
+ }
+
+ private function popList() {
+ $list = $this->list;
+ $this->list = array_pop($this->stack);
+ return $list;
+ }
+
+ private function pushItem($item, $type) {
+ $this->list[] = array(
+ 'type' => $type,
+ 'value' => $item,
+ );
+ }
+
+ public function writeData($data) {
+ $this->buffer .= $data;
+
+ $messages = array();
+ while (true) {
+ if ($this->state == 'item') {
+ $match = null;
+ $result = null;
+ $buf = $this->buffer;
+ if (preg_match('/^([a-z][a-z0-9-]*)\s/i', $buf, $match)) {
+ $this->pushItem($match[1], 'word');
+ } else if (preg_match('/^(\d+)\s/', $buf, $match)) {
+ $this->pushItem((int)$match[1], 'number');
+ } else if (preg_match('/^(\d+):/', $buf, $match)) {
+ // NOTE: The "+ 1" includes the space after the string.
+ $this->expectBytes = (int)$match[1] + 1;
+ $this->state = 'bytes';
+ } else if (preg_match('/^(\\()\s/', $buf, $match)) {
+ $this->pushList();
+ } else if (preg_match('/^(\\))\s/', $buf, $match)) {
+ $list = $this->popList();
+ if ($this->stack) {
+ $this->pushItem($list, 'list');
+ } else {
+ $result = $list;
+ }
+ } else {
+ $match = false;
+ }
+
+ if ($match !== false) {
+ $this->raw .= substr($this->buffer, 0, strlen($match[0]));
+ $this->buffer = substr($this->buffer, strlen($match[0]));
+
+ if ($result !== null) {
+ $messages[] = array(
+ 'structure' => $list,
+ 'raw' => $this->raw,
+ );
+ $this->raw = '';
+ }
+ } else {
+ // No matches yet, wait for more data.
+ break;
+ }
+ } else if ($this->state == 'bytes') {
+ $new_data = substr($this->buffer, 0, $this->expectBytes);
+ $this->buffer = substr($this->buffer, strlen($new_data));
+
+ $this->expectBytes -= strlen($new_data);
+ $this->raw .= $new_data;
+ $this->byteBuffer .= $new_data;
+
+ if (!$this->expectBytes) {
+ $this->state = 'byte-space';
+ // Strip off the terminal space.
+ $this->pushItem(substr($this->byteBuffer, 0, -1), 'string');
+ $this->byteBuffer = '';
+ $this->state = 'item';
+ }
+ } else {
+ throw new Exception("Invalid state '{$this->state}'!");
+ }
+ }
+
+ return $messages;
+ }
+
+ /**
+ * Convert a parsed command struct into a wire protocol string.
+ */
+ public function serializeStruct(array $struct) {
+ $out = array();
+
+ $out[] = '( ';
+ foreach ($struct as $item) {
+ $value = $item['value'];
+ $type = $item['type'];
+ switch ($type) {
+ case 'word':
+ $out[] = $value;
+ break;
+ case 'number':
+ $out[] = $value;
+ break;
+ case 'string':
+ $out[] = strlen($value).':'.$value;
+ break;
+ case 'list':
+ $out[] = self::serializeStruct($value);
+ break;
+ default:
+ throw new Exception("Unknown SVN wire protocol structure '{$type}'!");
+ }
+ if ($type != 'list') {
+ $out[] = ' ';
+ }
+ }
+ $out[] = ') ';
+
+ return implode('', $out);
+ }
+
+ public function isReadOnlyCommand(array $struct) {
+ if (empty($struct[0]['type']) || ($struct[0]['type'] != 'word')) {
+ // This isn't what we expect; fail defensively.
+ throw new Exception(
+ pht("Unexpected command structure, expected '( word ... )'."));
+ }
+
+ switch ($struct[0]['value']) {
+ // Authentication command set.
+ case 'EXTERNAL':
+
+ // The "Main" command set. Some of the commands in this command set are
+ // mutation commands, and are omitted from this list.
+ case 'reparent':
+ case 'get-latest-rev':
+ case 'get-dated-rev':
+ case 'rev-proplist':
+ case 'rev-prop':
+ case 'get-file':
+ case 'get-dir':
+ case 'check-path':
+ case 'stat':
+ case 'update':
+ case 'get-mergeinfo':
+ case 'switch':
+ case 'status':
+ case 'diff':
+ case 'log':
+ case 'get-file-revs':
+ case 'get-locations':
+
+ // The "Report" command set. These are not actually mutation
+ // operations, they just define a request for information.
+ case 'set-path':
+ case 'delete-path':
+ case 'link-path':
+ case 'finish-report':
+ case 'abort-report':
+
+ // These are used to report command results.
+ case 'success':
+ case 'failure':
+
+ // If we get here, we've matched some known read-only command.
+ return true;
+ default:
+ // Anything else isn't a known read-only command, so require write
+ // access to use it.
+ break;
+ }
+
+ return false;
+ }
+
+}
Index: src/applications/diffusion/protocol/__tests__/DiffusionSubversionWireProtocolTestCase.php
===================================================================
--- /dev/null
+++ src/applications/diffusion/protocol/__tests__/DiffusionSubversionWireProtocolTestCase.php
@@ -0,0 +1,80 @@
+<?php
+
+final class DiffusionSubversionWireProtocolTestCase
+ extends PhabricatorTestCase {
+
+ public function testSubversionWireProtocolParser() {
+ $this->assertSameSubversionMessages(
+ '( ) ',
+ array(
+ array(
+ ),
+ ));
+
+ $this->assertSameSubversionMessages(
+ '( duck 5:quack 42 ( item1 item2 ) ) ',
+ array(
+ array(
+ array(
+ 'type' => 'word',
+ 'value' => 'duck',
+ ),
+ array(
+ 'type' => 'string',
+ 'value' => 'quack',
+ ),
+ array(
+ 'type' => 'number',
+ 'value' => 42,
+ ),
+ array(
+ 'type' => 'list',
+ 'value' => array(
+ array(
+ 'type' => 'word',
+ 'value' => 'item1',
+ ),
+ array(
+ 'type' => 'word',
+ 'value' => 'item2',
+ ),
+ ),
+ ),
+ ),
+ ));
+
+ $this->assertSameSubversionMessages(
+ '( msg1 ) ( msg2 ) ',
+ array(
+ array(
+ array(
+ 'type' => 'word',
+ 'value' => 'msg1',
+ ),
+ ),
+ array(
+ array(
+ 'type' => 'word',
+ 'value' => 'msg2',
+ ),
+ ),
+ ));
+ }
+
+ private function assertSameSubversionMessages($string, array $structs) {
+ $proto = new DiffusionSubversionWireProtocol();
+
+ // Verify that the wire message parses into the structs.
+ $messages = $proto->writeData($string);
+ $messages = ipull($messages, 'structure');
+ $this->assertEqual($structs, $messages, 'parse<'.$string.'>');
+
+ // Verify that the structs serialize into the wire message.
+ $serial = array();
+ foreach ($structs as $struct) {
+ $serial[] = $proto->serializeStruct($struct);
+ }
+ $serial = implode('', $serial);
+ $this->assertEqual($string, $serial, 'serialize<'.$string.'>');
+ }
+}
Index: src/applications/diffusion/ssh/DiffusionSSHGitReceivePackWorkflow.php
===================================================================
--- src/applications/diffusion/ssh/DiffusionSSHGitReceivePackWorkflow.php
+++ src/applications/diffusion/ssh/DiffusionSSHGitReceivePackWorkflow.php
@@ -14,13 +14,10 @@
));
}
- public function getRequestPath() {
+ protected function executeRepositoryOperations() {
$args = $this->getArgs();
- return head($args->getArg('dir'));
- }
-
- protected function executeRepositoryOperations(
- PhabricatorRepository $repository) {
+ $path = head($args->getArg('dir'));
+ $repository = $this->loadRepository($path);
// This is a write, and must have write access.
$this->requireWriteAccess();
@@ -28,6 +25,7 @@
$future = new ExecFuture(
'git-receive-pack %s',
$repository->getLocalPath());
+
$err = $this->newPassthruCommand()
->setIOChannel($this->getIOChannel())
->setCommandChannelFromExecFuture($future)
Index: src/applications/diffusion/ssh/DiffusionSSHGitUploadPackWorkflow.php
===================================================================
--- src/applications/diffusion/ssh/DiffusionSSHGitUploadPackWorkflow.php
+++ src/applications/diffusion/ssh/DiffusionSSHGitUploadPackWorkflow.php
@@ -14,13 +14,10 @@
));
}
- public function getRequestPath() {
+ protected function executeRepositoryOperations() {
$args = $this->getArgs();
- return head($args->getArg('dir'));
- }
-
- protected function executeRepositoryOperations(
- PhabricatorRepository $repository) {
+ $path = head($args->getArg('dir'));
+ $repository = $this->loadRepository($path);
$future = new ExecFuture('git-upload-pack %s', $repository->getLocalPath());
Index: src/applications/diffusion/ssh/DiffusionSSHMercurialServeWorkflow.php
===================================================================
--- src/applications/diffusion/ssh/DiffusionSSHMercurialServeWorkflow.php
+++ src/applications/diffusion/ssh/DiffusionSSHMercurialServeWorkflow.php
@@ -24,12 +24,10 @@
));
}
- public function getRequestPath() {
- return $this->getArgs()->getArg('repository');
- }
-
- protected function executeRepositoryOperations(
- PhabricatorRepository $repository) {
+ protected function executeRepositoryOperations() {
+ $args = $this->getArgs();
+ $path = $args->getArg('repository');
+ $repository = $this->loadRepository($path);
$args = $this->getArgs();
Index: src/applications/diffusion/ssh/DiffusionSSHSubversionServeWorkflow.php
===================================================================
--- /dev/null
+++ src/applications/diffusion/ssh/DiffusionSSHSubversionServeWorkflow.php
@@ -0,0 +1,259 @@
+<?php
+
+/**
+ * This protocol has a good spec here:
+ *
+ * http://svn.apache.org/repos/asf/subversion/trunk/subversion/libsvn_ra_svn/protocol
+ *
+ */
+final class DiffusionSSHSubversionServeWorkflow
+ extends DiffusionSSHSubversionWorkflow {
+
+ private $didSeeWrite;
+
+ private $inProtocol;
+ private $outProtocol;
+
+ private $inSeenGreeting;
+
+ private $outPhaseCount = 0;
+
+ private $internalBaseURI;
+ private $externalBaseURI;
+
+ public function didConstruct() {
+ $this->setName('svnserve');
+ $this->setArguments(
+ array(
+ array(
+ 'name' => 'tunnel',
+ 'short' => 't',
+ ),
+ ));
+ }
+
+ protected function executeRepositoryOperations() {
+ $args = $this->getArgs();
+ if (!$args->getArg('tunnel')) {
+ throw new Exception("Expected `svnserve -t`!");
+ }
+
+ $future = new ExecFuture('svnserve -t');
+
+ $this->inProtocol = new DiffusionSubversionWireProtocol();
+ $this->outProtocol = new DiffusionSubversionWireProtocol();
+
+ $err = id($this->newPassthruCommand())
+ ->setIOChannel($this->getIOChannel())
+ ->setCommandChannelFromExecFuture($future)
+ ->setWillWriteCallback(array($this, 'willWriteMessageCallback'))
+ ->setWillReadCallback(array($this, 'willReadMessageCallback'))
+ ->execute();
+
+ if (!$err && $this->didSeeWrite) {
+ $this->getRepository()->writeStatusMessage(
+ PhabricatorRepositoryStatusMessage::TYPE_NEEDS_UPDATE,
+ PhabricatorRepositoryStatusMessage::CODE_OKAY);
+ }
+
+ return $err;
+ }
+
+ public function willWriteMessageCallback(
+ PhabricatorSSHPassthruCommand $command,
+ $message) {
+
+ $proto = $this->inProtocol;
+ $messages = $proto->writeData($message);
+
+ $result = array();
+ foreach ($messages as $message) {
+ $message_raw = $message['raw'];
+ $struct = $message['structure'];
+
+ if (!$this->inSeenGreeting) {
+ $this->inSeenGreeting = true;
+
+ // The first message the client sends looks like:
+ //
+ // ( version ( cap1 ... ) url ... )
+ //
+ // We want to grab the URL, load the repository, make sure it exists and
+ // is accessible, and then replace it with the location of the
+ // repository on disk.
+
+ $uri = $struct[2]['value'];
+ $struct[2]['value'] = $this->makeInternalURI($uri);
+
+ $message_raw = $proto->serializeStruct($struct);
+ } else if (isset($struct[0]) && $struct[0]['type'] == 'word') {
+
+ if (!$proto->isReadOnlyCommand($struct)) {
+ $this->didSeeWrite = true;
+ $this->requireWriteAccess($struct[0]['value']);
+ }
+
+ // Several other commands also pass in URLs. We need to translate
+ // all of these into the internal representation; this also makes sure
+ // they're valid and accessible.
+
+ switch ($struct[0]['value']) {
+ case 'reparent':
+ // ( reparent ( url ) )
+ $struct[1]['value'][0]['value'] = $this->makeInternalURI(
+ $struct[1]['value'][0]['value']);
+ $message_raw = $proto->serializeStruct($struct);
+ break;
+ case 'switch':
+ // ( switch ( ( rev ) target recurse url ... ) )
+ $struct[1]['value'][3]['value'] = $this->makeInternalURI(
+ $struct[1]['value'][3]['value']);
+ $message_raw = $proto->serializeStruct($struct);
+ break;
+ case 'diff':
+ // ( diff ( ( rev ) target recurse ignore-ancestry url ... ) )
+ $struct[1]['value'][4]['value'] = $this->makeInternalURI(
+ $struct[1]['value'][4]['value']);
+ $message_raw = $proto->serializeStruct($struct);
+ break;
+ }
+ }
+
+ $result[] = $message_raw;
+ }
+
+ if (!$result) {
+ return null;
+ }
+
+ return implode('', $result);
+ }
+
+ public function willReadMessageCallback(
+ PhabricatorSSHPassthruCommand $command,
+ $message) {
+
+ $proto = $this->outProtocol;
+ $messages = $proto->writeData($message);
+
+ $result = array();
+ foreach ($messages as $message) {
+ $message_raw = $message['raw'];
+ $struct = $message['structure'];
+
+ if (isset($struct[0]) && ($struct[0]['type'] == 'word')) {
+
+ if ($struct[0]['value'] == 'success') {
+ switch ($this->outPhaseCount) {
+ case 0:
+ // This is the "greeting", which announces capabilities.
+ break;
+ case 1:
+ // This responds to the client greeting, and announces auth.
+ break;
+ case 2:
+ // This responds to auth, which should be trivial over SSH.
+ break;
+ case 3:
+ // This contains the URI of the repository. We need to edit it;
+ // if it does not match what the client requested it will reject
+ // the response.
+ $struct[1]['value'][1]['value'] = $this->makeExternalURI(
+ $struct[1]['value'][1]['value']);
+ $message_raw = $proto->serializeStruct($struct);
+ break;
+ default:
+ // We don't care about other protocol frames.
+ break;
+ }
+
+ $this->outPhaseCount++;
+ } else if ($struct[0]['value'] == 'failure') {
+ // Find any error messages which include the internal URI, and
+ // replace the text with the external URI.
+ foreach ($struct[1]['value'] as $key => $error) {
+ $code = $error['value'][0]['value'];
+ $message = $error['value'][1]['value'];
+
+ $message = str_replace(
+ $this->internalBaseURI,
+ $this->externalBaseURI,
+ $message);
+
+ // Derp derp derp derp derp. The structure looks like this:
+ // ( failure ( ( code message ... ) ... ) )
+ $struct[1]['value'][$key]['value'][1]['value'] = $message;
+ }
+ $message_raw = $proto->serializeStruct($struct);
+ }
+
+ }
+
+ $result[] = $message_raw;
+ }
+
+ if (!$result) {
+ return null;
+ }
+
+ return implode('', $result);
+ }
+
+ private function makeInternalURI($uri_string) {
+ $uri = new PhutilURI($uri_string);
+
+ $proto = $uri->getProtocol();
+ if ($proto !== 'svn+ssh') {
+ throw new Exception(
+ pht(
+ 'Protocol for URI "%s" MUST be "svn+ssh".',
+ $uri_string));
+ }
+
+ $path = $uri->getPath();
+
+ // Subversion presumably deals with this, but make sure there's nothing
+ // skethcy going on with the URI.
+ if (preg_match('(/\\.\\./)', $path)) {
+ throw new Exception(
+ pht(
+ 'String "/../" is invalid in path specification "%s".',
+ $uri_string));
+ }
+
+ $repository = $this->loadRepository($path);
+
+ $path = preg_replace(
+ '(^/diffusion/[A-Z]+)',
+ rtrim($repository->getLocalPath(), '/'),
+ $path);
+
+ if (preg_match('(^/diffusion/[A-Z]+/$)', $path)) {
+ $path = rtrim($path, '/');
+ }
+
+ $uri->setPath($path);
+
+ // If this is happening during the handshake, these are the base URIs for
+ // the request.
+ if ($this->externalBaseURI === null) {
+ $pre = (string)id(clone $uri)->setPath('');
+ $this->externalBaseURI = $pre.'/diffusion/'.$repository->getCallsign();
+ $this->internalBaseURI = $pre.rtrim($repository->getLocalPath(), '/');
+ }
+
+ return (string)$uri;
+ }
+
+ private function makeExternalURI($uri) {
+ $internal = $this->internalBaseURI;
+ $external = $this->externalBaseURI;
+
+ if (strncmp($uri, $internal, strlen($internal)) === 0) {
+ $uri = $external.substr($uri, strlen($internal));
+ }
+
+ return $uri;
+ }
+
+}
Index: src/applications/diffusion/ssh/DiffusionSSHSubversionWorkflow.php
===================================================================
--- /dev/null
+++ src/applications/diffusion/ssh/DiffusionSSHSubversionWorkflow.php
@@ -0,0 +1,10 @@
+<?php
+
+abstract class DiffusionSSHSubversionWorkflow extends DiffusionSSHWorkflow {
+
+ protected function writeError($message) {
+ // Subversion assumes we'll add our own newlines.
+ return parent::writeError($message."\n");
+ }
+
+}
Index: src/applications/diffusion/ssh/DiffusionSSHWorkflow.php
===================================================================
--- src/applications/diffusion/ssh/DiffusionSSHWorkflow.php
+++ src/applications/diffusion/ssh/DiffusionSSHWorkflow.php
@@ -7,6 +7,9 @@
private $hasWriteAccess;
public function getRepository() {
+ if (!$this->repository) {
+ throw new Exception("Call loadRepository() before getRepository()!");
+ }
return $this->repository;
}
@@ -14,9 +17,7 @@
return $this->args;
}
- abstract protected function getRequestPath();
- abstract protected function executeRepositoryOperations(
- PhabricatorRepository $repository);
+ abstract protected function executeRepositoryOperations();
protected function writeError($message) {
$this->getErrorChannel()->write($message);
@@ -27,18 +28,15 @@
$this->args = $args;
try {
- $repository = $this->loadRepository();
- $this->repository = $repository;
- return $this->executeRepositoryOperations($repository);
+ return $this->executeRepositoryOperations();
} catch (Exception $ex) {
$this->writeError(get_class($ex).': '.$ex->getMessage());
return 1;
}
}
- private function loadRepository() {
+ protected function loadRepository($path) {
$viewer = $this->getUser();
- $path = $this->getRequestPath();
$regex = '@^/?diffusion/(?P<callsign>[A-Z]+)(?:/|$)@';
$matches = null;
@@ -74,10 +72,12 @@
pht('This repository is not available over SSH.'));
}
+ $this->repository = $repository;
+
return $repository;
}
- protected function requireWriteAccess() {
+ protected function requireWriteAccess($protocol_command = null) {
if ($this->hasWriteAccess === true) {
return;
}
@@ -87,8 +87,16 @@
switch ($repository->getServeOverSSH()) {
case PhabricatorRepository::SERVE_READONLY:
- throw new Exception(
- pht('This repository is read-only over SSH.'));
+ if ($protocol_command !== null) {
+ throw new Exception(
+ pht(
+ 'This repository is read-only over SSH (tried to execute '.
+ 'protocol command "%s").',
+ $protocol_command));
+ } else {
+ throw new Exception(
+ pht('This repository is read-only over SSH.'));
+ }
break;
case PhabricatorRepository::SERVE_READWRITE:
$can_push = PhabricatorPolicyFilter::hasCapability(
Index: src/infrastructure/ssh/PhabricatorSSHPassthruCommand.php
===================================================================
--- src/infrastructure/ssh/PhabricatorSSHPassthruCommand.php
+++ src/infrastructure/ssh/PhabricatorSSHPassthruCommand.php
@@ -139,6 +139,12 @@
if ($done) {
break;
}
+
+ // If the client has disconnected, kill the subprocess and bail.
+ if (!$io_channel->isOpenForWriting()) {
+ $this->execFuture->resolveKill();
+ break;
+ }
}
list($err) = $this->execFuture->resolve();

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