Serve git writes over SSH

Summary: Looks like this is pretty straightforward; same as the reads except mark it as needing PUSH.

Test Plan: Ran `git push`, pushed over SSH to a hosted repo.

Reviewers: btrahan

Reviewed By: btrahan

CC: hach-que, aran

Maniphest Tasks: T2230

Differential Revision: https://secure.phabricator.com/D7425

scripts/ssh/ssh-exec.php

@@ -63,6 +63,7 @@ try {
     new ConduitSSHWorkflow(),
 
     new DiffusionSSHGitUploadPackWorkflow(),
+    new DiffusionSSHGitReceivePackWorkflow(),
   );
 
   $workflow_names = mpull($workflows, 'getName', 'getName');

src/__phutil_library_map__.php

@@ -527,6 +527,7 @@ phutil_register_library_map(array(
     'DiffusionRepositoryPath' => 'applications/diffusion/data/DiffusionRepositoryPath.php',
     'DiffusionRepositoryTag' => 'applications/diffusion/data/DiffusionRepositoryTag.php',
     'DiffusionRequest' => 'applications/diffusion/request/DiffusionRequest.php',
+    'DiffusionSSHGitReceivePackWorkflow' => 'applications/diffusion/ssh/DiffusionSSHGitReceivePackWorkflow.php',
     'DiffusionSSHGitUploadPackWorkflow' => 'applications/diffusion/ssh/DiffusionSSHGitUploadPackWorkflow.php',
     'DiffusionSSHGitWorkflow' => 'applications/diffusion/ssh/DiffusionSSHGitWorkflow.php',
     'DiffusionSSHWorkflow' => 'applications/diffusion/ssh/DiffusionSSHWorkflow.php',
@@ -2716,6 +2717,7 @@ phutil_register_library_map(array(
       0 => 'DiffusionController',
       1 => 'PhabricatorApplicationSearchResultsControllerInterface',
     ),
+    'DiffusionSSHGitReceivePackWorkflow' => 'DiffusionSSHGitWorkflow',
     'DiffusionSSHGitUploadPackWorkflow' => 'DiffusionSSHGitWorkflow',
     'DiffusionSSHGitWorkflow' => 'DiffusionSSHWorkflow',
     'DiffusionSSHWorkflow' => 'PhabricatorSSHWorkflow',

src/applications/diffusion/ssh/DiffusionSSHGitReceivePackWorkflow.php

@@ -0,0 +1,34 @@
+<?php
+
+final class DiffusionSSHGitReceivePackWorkflow
+  extends DiffusionSSHGitWorkflow {
+
+  public function didConstruct() {
+    $this->setName('git-receive-pack');
+    $this->setArguments(
+      array(
+        array(
+          'name'      => 'dir',
+          'wildcard'  => true,
+        ),
+      ));
+  }
+
+  public function isReadOnly() {
+    return false;
+  }
+
+  public function getRequestPath() {
+    $args = $this->getArgs();
+    return head($args->getArg('dir'));
+  }
+
+  protected function executeRepositoryOperations(
+    PhabricatorRepository $repository) {
+    $future = new ExecFuture(
+      'git-receive-pack %s',
+      $repository->getLocalPath());
+    return $this->passthruIO($future);
+  }
+
+}